1
00:00:00,270 --> 00:00:01,080
Welcome back.

2
00:00:01,080 --> 00:00:07,410
In this video we're going to be doing some essential fixes to our application so we've made good progress

3
00:00:07,410 --> 00:00:13,650
so far but there are certain things are boats the application that can be changed I can be you know

4
00:00:13,750 --> 00:00:17,410
refined and just list a few of them.

5
00:00:17,430 --> 00:00:24,060
Well we want to do is make sure that only one window at a time comes up meaning when I in my application

6
00:00:24,060 --> 00:00:25,990
say that I want to add a car.

7
00:00:26,070 --> 00:00:33,540
Let me just log in quickly so we can see exactly what I'm talking about when I say I want to launch

8
00:00:33,560 --> 00:00:38,790
a managed vehicle listing I don't want to be able to click that and have so many instances of the same

9
00:00:38,790 --> 00:00:39,540
window open.

10
00:00:39,540 --> 00:00:45,710
So we're going to be modifying or application so that only one window comes up at a time.

11
00:00:45,750 --> 00:00:46,900
That's one.

12
00:00:46,920 --> 00:00:55,490
And another thing that we will want to do is to do our grid auto refresh so we didn't get to do that

13
00:00:55,770 --> 00:00:59,130
but we want to do that where if I add a new car right.

14
00:00:59,160 --> 00:01:05,670
No I don't have to come back and click refresh but the grid should automatically refresh and show me

15
00:01:05,700 --> 00:01:07,800
the new car outside of that.

16
00:01:07,800 --> 00:01:12,660
Anything else would just be refining the messages and the visual cues that we give to our users with

17
00:01:12,690 --> 00:01:14,590
each operation that they complete.

18
00:01:14,820 --> 00:01:19,350
And then we will upload our application to GitHub.

19
00:01:19,710 --> 00:01:20,910
So let's get started.

20
00:01:20,910 --> 00:01:27,090
I'm going to exit the application and the first thing that we're going to tackle is opening one window

21
00:01:27,150 --> 00:01:28,170
at a time.

22
00:01:28,230 --> 00:01:31,330
No they're for too much two ways to do this one.

23
00:01:31,440 --> 00:01:37,890
While one will help us maintain the MDI child the pattern that we have been using where when a window

24
00:01:37,890 --> 00:01:42,330
comes up as an MDI child they cannot be moved outside of the main window.

25
00:01:42,330 --> 00:01:47,280
And the other one is as short as that dialogue where that window will appear.

26
00:01:47,310 --> 00:01:54,300
Nothing else underneath that new window will be active until that new window is exited but then that's

27
00:01:54,300 --> 00:02:00,000
at the expense of it being an MBA child where it will sit on top and explain exactly what I mean.

28
00:02:00,480 --> 00:02:07,770
So let's start off with the manager equally still rather let us go to the main window and then I will

29
00:02:08,640 --> 00:02:12,400
look in one of these I have this option here.

30
00:02:12,420 --> 00:02:18,360
This button click event where I said I'd rent out the record and add another one for the managed vehicle

31
00:02:18,360 --> 00:02:19,440
listing fired.

32
00:02:20,400 --> 00:02:29,940
So I am going to modify the order into the record button click event to show a dialog instead.

33
00:02:29,940 --> 00:02:36,720
Now the problem with short dialogue is that I can't sit the appear and and then show a dialogue.

34
00:02:36,720 --> 00:02:41,840
You'll get an error part so you can show an MDI child.

35
00:02:41,850 --> 00:02:45,210
So after sitting in that appearance it becomes a dead child.

36
00:02:45,210 --> 00:02:48,240
And then I can show the window as I named my child.

37
00:02:48,270 --> 00:02:53,580
However I would have to omit or at least rearrange this line of code.

38
00:02:53,670 --> 00:03:02,110
So I'd have to put Shaw above the MDI Parent Line and I would have to say sure dialogue.

39
00:03:02,390 --> 00:03:09,360
So wanted shows dialogue pretty much that show MBA that MBA child sitting in their parents sitting gets

40
00:03:09,360 --> 00:03:11,530
nullified it's irrelevant at that point.

41
00:03:11,550 --> 00:03:13,720
But let's see what happens when a short dialogue.

42
00:03:13,720 --> 00:03:16,170
So let me start.

43
00:03:16,170 --> 00:03:16,530
All right.

44
00:03:16,560 --> 00:03:21,360
So we modified the man at her entire record.

45
00:03:21,360 --> 00:03:26,070
And so when I click monitor into records that's a click event.

46
00:03:26,070 --> 00:03:27,220
Right.

47
00:03:27,240 --> 00:03:27,500
And I.

48
00:03:27,600 --> 00:03:28,080
Oh sorry.

49
00:03:28,090 --> 00:03:33,790
It's this event at her entire record when I select that notice that it is not an immediate child.

50
00:03:33,810 --> 00:03:37,110
This window launched well outside of the main window.

51
00:03:37,110 --> 00:03:42,960
However I can't do anything outside of it while it is on the screen and you can see it blinking that

52
00:03:43,020 --> 00:03:47,870
each time it blinks that's me clicking something instead of me in windows I got over me in window I

53
00:03:47,880 --> 00:03:53,970
don't interact with anything and as a result only this window will remain active until I exit it and

54
00:03:53,970 --> 00:03:57,520
then I can proceed with anything else and application.

55
00:03:57,540 --> 00:04:04,380
So that's one very simple way of allowing are ensuring that only one instance of the windows open at

56
00:04:04,440 --> 00:04:05,800
any given time.

57
00:04:05,850 --> 00:04:15,240
Like I said though as you can see the window operates independently off the main window which may not

58
00:04:15,300 --> 00:04:18,160
necessarily be a bad thing depending on your objectives.

59
00:04:18,170 --> 00:04:20,660
So I mean in this situation it's not a bad thing.

60
00:04:20,670 --> 00:04:25,800
I can move it are owned and I can't do anything else until I close it.

61
00:04:25,800 --> 00:04:26,430
Right.

62
00:04:26,430 --> 00:04:28,830
So when I close it then it's business as usual.

63
00:04:28,830 --> 00:04:33,460
So that's not necessarily the worst thing that can happen really.

64
00:04:33,480 --> 00:04:38,490
So that is how you can go both ensuring one instance off the window is up.

65
00:04:38,490 --> 00:04:43,350
So if you want you could change out all of these shows to show dialogue.

66
00:04:43,500 --> 00:04:49,050
Once again though it has to happen before the MDI period line or else you get an error.

67
00:04:49,050 --> 00:04:54,210
So you could actually just remove this line where you set the MDA appearance if you're going to be showing

68
00:04:54,210 --> 00:04:55,920
the dialog.

69
00:04:55,920 --> 00:05:02,750
However I'm going to show you another method using the managed vehicle listing menu click event.

70
00:05:03,080 --> 00:05:10,910
So this one no I'm actually it's going to be far more lines of code and a little more goes into the

71
00:05:10,910 --> 00:05:11,770
thought process.

72
00:05:11,870 --> 00:05:18,270
But the fact is that I will retain the fact that this window has an MDI period.

73
00:05:18,440 --> 00:05:18,770
All right.

74
00:05:18,770 --> 00:05:26,920
So for the other window which is monetary closings or move some code I wrote the code already.

75
00:05:26,930 --> 00:05:29,860
So let me just walk you through it.

76
00:05:29,900 --> 00:05:37,580
So what's going to happen is that we're going to be checking all of the open forms in the application.

77
00:05:37,580 --> 00:05:39,370
So on button click right.

78
00:05:39,390 --> 00:05:44,720
When manage VK listing when that button is clicked and we're able to show we're going to initialize

79
00:05:44,720 --> 00:05:46,620
we're going to set that parent.

80
00:05:46,820 --> 00:05:54,460
But then I'm going to also check to see if there is any open form inside the application as I want of

81
00:05:54,470 --> 00:06:00,710
a fact describe it a bit I do all of that first and then if there is none then I initialize a new object

82
00:06:01,100 --> 00:06:02,330
and then sure the window.

83
00:06:02,330 --> 00:06:03,650
So let's do it that way.

84
00:06:03,640 --> 00:06:04,160
All right.

85
00:06:04,340 --> 00:06:10,070
So the first thing I want to do and then you'll see if you research it you'll see a number of ways of

86
00:06:10,070 --> 00:06:11,810
doing it so be be used for each loop.

87
00:06:11,810 --> 00:06:16,070
Some people use different methods but the concept remains the same.

88
00:06:16,070 --> 00:06:22,280
I'm actually going to use the link because link allows us to iterate through any list or collection

89
00:06:22,970 --> 00:06:26,710
just like if for using a for loop or a for each loop.

90
00:06:26,800 --> 00:06:33,500
So a link is not necessarily unique to only database queries but if you have a list that you want to

91
00:06:33,500 --> 00:06:40,340
interrogate just as if it was a list of requests going from the database side list of objects you can

92
00:06:40,340 --> 00:06:42,970
do the same thing using the link anyway.

93
00:06:43,010 --> 00:06:43,310
Right.

94
00:06:43,730 --> 00:06:49,570
So the first thing I want to do is declare some variables I'm going to say var open forms.

95
00:06:50,100 --> 00:06:50,660
All right.

96
00:06:50,750 --> 00:06:56,810
And then what I want to store in here is the number of or all the open forms in the application so I

97
00:06:56,810 --> 00:07:02,450
say application dot and then I can use open forms.

98
00:07:02,450 --> 00:07:02,900
All right.

99
00:07:02,900 --> 00:07:09,410
So this is giving me a little collection all of the forms owned by the applications that application

100
00:07:09,410 --> 00:07:12,760
is what comes up or what starts to run on we click start.

101
00:07:12,790 --> 00:07:13,540
Right.

102
00:07:13,550 --> 00:07:21,950
And then all of the forms are the open forms would be any window that is open at the time off it's running.

103
00:07:21,980 --> 00:07:22,270
All right.

104
00:07:22,580 --> 00:07:28,530
So I say application that open forms but then I want to do and I kind of list of forms.

105
00:07:28,530 --> 00:07:32,180
So while it's open forms as you can see it's a different data type.

106
00:07:32,180 --> 00:07:39,690
So I want to see a dot and then cast and I'm really casting it to the data type of a form.

107
00:07:39,710 --> 00:07:47,360
So I'm basically saying give me a list of the open forms in the data type form which is what I know.

108
00:07:47,450 --> 00:07:51,110
All right so remember that everything is off the base class farm.

109
00:07:51,170 --> 00:07:54,280
So I want all of them at the base class farm.

110
00:07:54,290 --> 00:08:00,770
So it will handle that type casting for me and then give me a list of the open forms of all of the data

111
00:08:00,770 --> 00:08:02,470
type farm.

112
00:08:02,540 --> 00:08:08,390
Now after I get that list off the open forms I'm going to declare another variable where I want to say

113
00:08:08,390 --> 00:08:12,010
is open so var is open there.

114
00:08:12,020 --> 00:08:15,060
So this is really going to be a boolean rights I'm saying via.

115
00:08:15,080 --> 00:08:20,510
But it's really going to be a boolean and I I'm telling you this because of how I named it is open.

116
00:08:20,510 --> 00:08:28,700
So usually it was a Boolean if you have noticed before you can you know take note of it know that whenever

117
00:08:28,700 --> 00:08:32,630
I declare a boolean I say is this or is that right.

118
00:08:32,720 --> 00:08:35,120
And that's a common pattern in programming.

119
00:08:35,120 --> 00:08:44,180
So I would just say VAR is open and then I'm going to say Give me the list of forms so I say open forms

120
00:08:45,430 --> 00:08:53,210
and then say dot no when I say that if you just look through this list you'll see that all of the options

121
00:08:53,240 --> 00:08:57,530
that we had in the link are here and available at first are defaults.

122
00:08:57,650 --> 00:09:00,440
You have the weird of the selectee of all of them.

123
00:09:00,440 --> 00:09:03,020
The one I'm interested in this time is any.

124
00:09:03,040 --> 00:09:03,350
Right.

125
00:09:03,350 --> 00:09:08,270
So any of those to stipulate a condition.

126
00:09:08,330 --> 00:09:12,920
Is there anything that has this condition and it will give you a true or false.

127
00:09:12,920 --> 00:09:13,240
All right.

128
00:09:13,700 --> 00:09:18,520
So I can see any and then blow up my land.

129
00:09:18,530 --> 00:09:19,310
Expression.

130
00:09:19,320 --> 00:09:22,330
So cue arrow and then cue dot.

131
00:09:22,340 --> 00:09:25,760
So I'm checking if there is any farm.

132
00:09:25,820 --> 00:09:27,430
So if I say kudos to you.

133
00:09:27,430 --> 00:09:33,760
Notice that all of these just the options we see when we are creating a new instance of a farm.

134
00:09:33,760 --> 00:09:34,160
Right.

135
00:09:34,160 --> 00:09:35,420
It's the same thing.

136
00:09:35,420 --> 00:09:42,580
So would you say if there is any farm and then I can do this too is I can say by text or by name so

137
00:09:42,580 --> 00:09:44,240
I'll just stick to a name.

138
00:09:44,330 --> 00:09:48,610
So if there is any form with then name right.

139
00:09:48,640 --> 00:09:55,450
That much is or is equivalent to the name of whatever I'm able to bring up so remember that the name

140
00:09:55,540 --> 00:09:59,770
of the farm is pretty much the class name right.

141
00:09:59,800 --> 00:10:06,970
So I can say is there any form with the name manage vehicle listing because I'm a to launch manage vehicle

142
00:10:06,970 --> 00:10:14,170
listing so I want to know if there is any farm that is open that has the name of the farm I'm about

143
00:10:14,170 --> 00:10:15,400
to launch right.

144
00:10:16,180 --> 00:10:19,910
And then if it is not.

145
00:10:19,960 --> 00:10:22,570
Or if not is open.

146
00:10:22,570 --> 00:10:27,750
I remember that this really translates to if is open is equivalent to falls.

147
00:10:27,820 --> 00:10:33,750
So if it is not open already then I will do all of this.

148
00:10:33,880 --> 00:10:34,350
All right.

149
00:10:34,570 --> 00:10:41,110
So this one has a bit more lines of code but once again the point is that we're just checking to see

150
00:10:41,500 --> 00:10:48,990
if there is any open farm currently with the same name as the one I want to launch.

151
00:10:49,030 --> 00:10:52,850
And if there isn't then I can go ahead and lodge it.

152
00:10:52,870 --> 00:10:59,110
I don't need an ETS because it's either true or false so if it's false then would launch it if it's

153
00:10:59,110 --> 00:10:59,890
true then.

154
00:10:59,890 --> 00:11:02,320
Well we skipped over everything and nothing happens.

155
00:11:02,320 --> 00:11:02,940
Right.

156
00:11:02,980 --> 00:11:05,490
So let's try that one.

157
00:11:05,530 --> 00:11:05,860
All right.

158
00:11:05,860 --> 00:11:11,700
So I'm about to launch manage vehicle listing that's the click event that we just modified.

159
00:11:11,830 --> 00:11:14,980
So when I click manage vehicle listing it will launch the window.

160
00:11:15,010 --> 00:11:18,150
Notice it's the launching as an MBA child.

161
00:11:18,250 --> 00:11:20,970
I didn't change anything about the way it launched.

162
00:11:20,980 --> 00:11:24,160
However if I click the button again and I'm clicking right.

163
00:11:24,160 --> 00:11:29,200
No I see the most is moving and I'm clicking you'll only see one instance coming up.

164
00:11:29,200 --> 00:11:34,660
That's because it's is checking all the open farms and seeing that there is an open forum with that

165
00:11:34,660 --> 00:11:40,390
name already so nothing should happen if I close it and then click it again then it will work and then

166
00:11:40,390 --> 00:11:42,730
ever subsequent click does nothing.

167
00:11:42,760 --> 00:11:51,190
So we see that that is one way that we can retain that MDI child behavior but ensure that only one window

168
00:11:51,370 --> 00:11:52,770
comes up at a time.

169
00:11:54,390 --> 00:11:56,690
So you can use either method.

170
00:11:56,850 --> 00:12:05,400
Like I said the short dialogue doesn't allow for the MDA child but it does give the farm that is launching

171
00:12:05,400 --> 00:12:12,390
kind of the autonomy of not being a child but then based on your application flow under your expectations

172
00:12:12,600 --> 00:12:15,690
then you can use either one that you wish.

173
00:12:16,410 --> 00:12:16,880
No.

174
00:12:16,880 --> 00:12:27,020
Moving on we want to start looking at our grid refresh know what we want to do is ensure that after

175
00:12:27,020 --> 00:12:35,540
we do that that I'd edit operation or add delete operation that our grid refreshes automatically.

176
00:12:35,540 --> 00:12:41,840
So what happens right now is that when you add or edit a record it will you know say the success message

177
00:12:41,870 --> 00:12:48,700
but then you still have to go back to your the manage list and then you just launch applications so

178
00:12:48,700 --> 00:12:49,480
we can see.

179
00:12:49,680 --> 00:12:50,120
All right.

180
00:12:50,120 --> 00:12:54,950
So like I was saying we have to when we launch manage vehicle listing.

181
00:12:54,950 --> 00:13:03,770
If I add a new car right then I would have to come back here and then refresh manually for me to see

182
00:13:03,770 --> 00:13:04,340
the changes.

183
00:13:04,340 --> 00:13:11,060
So I want to modify that after the car and I click submit and it has been saved to the database that

184
00:13:11,060 --> 00:13:18,770
the grid refreshes and I don't I will actually be able to delete and remove or remove the need for this

185
00:13:18,770 --> 00:13:20,080
refresh button.

186
00:13:20,540 --> 00:13:27,710
So no we'll have to actually get creative just like we had to kind of get creative with the log in form

187
00:13:28,010 --> 00:13:35,840
where when we were launching our main window remember that we had to modify it to put in an object off

188
00:13:35,840 --> 00:13:43,700
the log in form into our constructor so that we could manipulate the properties of the log in form when

189
00:13:43,700 --> 00:13:46,340
we wanted or which in this case was to close it.

190
00:13:46,340 --> 00:13:53,390
So what I'm going to have to do is whatever window is launching or manage windows so manage vehicle

191
00:13:53,390 --> 00:14:00,600
listing I'm going to have to pass an object off this into the ad edit window.

192
00:14:00,860 --> 00:14:01,390
All right.

193
00:14:01,400 --> 00:14:08,060
Or even if it's the edit whichever one but once I'm caught in that window I need to pass an object of

194
00:14:08,150 --> 00:14:12,890
this into that phone showing called into that constructor call.

195
00:14:13,010 --> 00:14:13,730
Right.

196
00:14:13,760 --> 00:14:21,820
And then from this window when it launches I'll be able to you know execute with a populate grid function

197
00:14:21,830 --> 00:14:22,290
call.

198
00:14:22,820 --> 00:14:29,170
So I have a function called populate grid which runs of course runs the query sorry.

199
00:14:29,180 --> 00:14:31,710
To actually populate its own grid.

200
00:14:31,850 --> 00:14:33,080
And right now it's private.

201
00:14:33,080 --> 00:14:37,570
So we'll just do the out and then we'll seal all of the changes someone to do it with a manager eco

202
00:14:37,570 --> 00:14:44,500
listing and then I'm going to challenge you to get it done with the current records window also.

203
00:14:44,720 --> 00:14:44,960
All right.

204
00:14:46,010 --> 00:14:47,090
So let's get started.

205
00:14:47,120 --> 00:14:53,400
So the first thing that I want to do is modify my constructors and add edit vehicle so I'd edit vehicle

206
00:14:53,400 --> 00:15:00,920
ahead clean constructor and the constructor that took an object off the car.

207
00:15:01,160 --> 00:15:11,930
Now what I'm going to have to do is modify this so that I have one my private property off type manage

208
00:15:12,650 --> 00:15:17,180
vehicle listing so I'm making this global because I don't know when I'm going to need it.

209
00:15:17,180 --> 00:15:22,880
So after make it global just like I had to do with a log in and everything else that's up here and then

210
00:15:22,880 --> 00:15:29,280
I'm going to call it manage vehicle listing and then I'm going to tell this constructor.

211
00:15:29,300 --> 00:15:38,240
So just copy this quickly that it should take this concept to that had no parameters initially it should

212
00:15:38,240 --> 00:15:44,000
take parameter off type money vehicle listing on this what I want to say it does underscore manage vehicle

213
00:15:44,000 --> 00:15:48,880
listing but then the prob the parameter won't have the underscore.

214
00:15:49,440 --> 00:15:50,110
All right.

215
00:15:50,120 --> 00:15:56,740
So either constructor is supposed to take an object of manage vehicle listing.

216
00:15:57,000 --> 00:16:04,670
Now I can modify this parameter and say something like equals NULL which would then say that you may

217
00:16:04,670 --> 00:16:07,580
or may not need to pass of value in.

218
00:16:07,580 --> 00:16:07,940
All right.

219
00:16:07,940 --> 00:16:12,100
So to make it not a requirement I can see equals.

220
00:16:12,120 --> 00:16:12,430
No.

221
00:16:12,440 --> 00:16:19,220
So if you have to call this constructor but you don't want to pass in that window or this object then

222
00:16:19,520 --> 00:16:25,780
this would kind of help to ease the frustration that would happen at that point right.

223
00:16:26,090 --> 00:16:31,790
So I can do that for both of these parameters and C equals no just in case the person wants to call

224
00:16:31,790 --> 00:16:37,040
the ad or edit constructor without passing in the manage vehicle.

225
00:16:37,040 --> 00:16:42,320
Sorry I said use of what's it's really you the programmer I'm catering to this point.

226
00:16:42,320 --> 00:16:42,590
All right.

227
00:16:42,950 --> 00:16:52,700
So after we've gotten our parameters we want to initialize our local or our private object that we just

228
00:16:52,700 --> 00:16:58,250
declared or to initialize it to whatever value comes in to manage vehicle listing.

229
00:16:58,250 --> 00:17:02,000
So if it's not it's not if it's not no then we get an object.

230
00:17:02,000 --> 00:17:02,680
Right.

231
00:17:03,110 --> 00:17:08,500
So manage vehicle listing easy on the square miles you go this thing is equal to that.

232
00:17:08,660 --> 00:17:12,840
And I'll just take this line and repeat it below.

233
00:17:12,860 --> 00:17:23,800
All right and so whenever our window launches it will have some knowledge of the Managed vehicle listing

234
00:17:24,520 --> 00:17:25,990
window that called it.

235
00:17:26,010 --> 00:17:32,770
So it's easy enough to declare an object off one inside off their own time but then each time we declare

236
00:17:32,770 --> 00:17:34,780
an object it's a brand new object.

237
00:17:34,780 --> 00:17:37,390
It's not the object that exists.

238
00:17:37,400 --> 00:17:37,750
All right.

239
00:17:37,960 --> 00:17:42,850
So we want to make sure that we're tracking the one that exists are the one that called it because we

240
00:17:42,850 --> 00:17:47,380
know that the one that called it is the one that is open in the background currently showing the grid.

241
00:17:47,380 --> 00:17:48,070
All right.

242
00:17:48,070 --> 00:17:51,620
So I going to know go back.

243
00:17:51,640 --> 00:17:52,270
Sorry.

244
00:17:52,330 --> 00:18:00,980
Go back to manage equally listing and then I'm going to make sure that I just hold onto control and

245
00:18:00,980 --> 00:18:03,680
click and then I can just double click.

246
00:18:03,680 --> 00:18:06,640
So if you have more than want instances it will financially double click.

247
00:18:06,650 --> 00:18:08,340
Which one you want to jump to.

248
00:18:08,420 --> 00:18:16,210
So then my function calls to add edits vehicle or mine edit vehicle.

249
00:18:16,250 --> 00:18:22,730
Yes I noticed that there is no arrow because I did set the parameter to be knowledgeable.

250
00:18:22,750 --> 00:18:23,000
Right.

251
00:18:23,000 --> 00:18:27,080
So because I said it to be knowledgeable and let me just change it our own and just show you exactly

252
00:18:27,080 --> 00:18:27,900
what I mean.

253
00:18:27,980 --> 00:18:33,560
If I did not say that he can be equal to null then manage vehicle listing.

254
00:18:33,560 --> 00:18:38,660
This constructor would then give me a red line because then it saying that it doesn't have a constructor

255
00:18:38,660 --> 00:18:43,130
that takes all arguments it needs and it needs to pass in an argument.

256
00:18:43,130 --> 00:18:50,210
Because I said it can be equal to no let me find it back because I said it can be equal to no.

257
00:18:50,360 --> 00:18:56,810
Then I can proceed to meet the regular function call it if I want to are the regular constructor call

258
00:18:56,810 --> 00:18:58,760
without passing a parameter.

259
00:18:58,760 --> 00:18:59,030
All right.

260
00:18:59,030 --> 00:19:04,520
So that is one of those things that I'm just showing you just in case that you wanted to be more versatile.

261
00:19:04,940 --> 00:19:07,110
Either way I'm going to pass in this.

262
00:19:07,130 --> 00:19:15,410
So this surplus in some object of the manage vehicle listing window that is making the call to add edit

263
00:19:15,530 --> 00:19:16,150
vehicle.

264
00:19:16,170 --> 00:19:16,660
Right.

265
00:19:16,760 --> 00:19:23,000
So I'll put this in for the ad click and also do the same for the edit.

266
00:19:23,030 --> 00:19:28,880
So they see the edit click is the same thing it's passing in car which is our required parameter but

267
00:19:28,910 --> 00:19:31,380
it's not crying all the time all the money.

268
00:19:31,380 --> 00:19:32,110
Vehicle listing.

269
00:19:32,120 --> 00:19:36,500
However I will say comma this all right.

270
00:19:36,500 --> 00:19:38,540
No that that is done.

271
00:19:38,540 --> 00:19:45,620
What will happen is that when we add or edit the vehicle once we complete our operation in this function

272
00:19:45,620 --> 00:19:46,510
call.

273
00:19:46,550 --> 00:19:47,270
All right.

274
00:19:47,300 --> 00:19:52,450
The expectation is that our grid is going to refresh.

275
00:19:52,460 --> 00:19:58,700
So what I'm going to do is before show in the message box and seeing everything is completed I'm going

276
00:19:58,700 --> 00:19:59,480
to put in

277
00:20:02,270 --> 00:20:09,950
call to our objects to underscore manage vehicle listing and then I would call populates grid.

278
00:20:10,220 --> 00:20:12,220
No notice that I can't call it.

279
00:20:12,230 --> 00:20:14,810
It's not coming up in the this sense.

280
00:20:14,920 --> 00:20:17,830
And even if I type it all out it's not calling it.

281
00:20:17,870 --> 00:20:18,530
All right.

282
00:20:18,590 --> 00:20:20,960
So what happens is that it is private.

283
00:20:21,050 --> 00:20:25,160
So it's private over inside of our managed vehicle listing.

284
00:20:25,160 --> 00:20:28,410
Let me see if I can find it quickly.

285
00:20:28,610 --> 00:20:29,580
It's private here.

286
00:20:29,580 --> 00:20:32,060
Second call it from outside.

287
00:20:32,060 --> 00:20:37,520
So if I make it public then that problem gets solved.

288
00:20:37,520 --> 00:20:43,350
So I say public void populate grid and then we'll be able to call it.

289
00:20:43,370 --> 00:20:45,550
So let's review the expectation here.

290
00:20:45,560 --> 00:20:55,610
When I click save on whether it's an ad for operation or an edit operation the expectation is that our

291
00:20:55,730 --> 00:21:03,230
you know we do everything that we know we do we check if it's edit mode and we populate or object accordingly.

292
00:21:03,230 --> 00:21:08,350
So you see that we kind of repeated code and we kind of reflected that the last time sort of a BBC if

293
00:21:08,350 --> 00:21:09,390
change is here.

294
00:21:09,440 --> 00:21:16,570
However BBC if change is here and I really wouldn't want to repeat those things all the time right.

295
00:21:16,580 --> 00:21:26,410
So what I'll do is remove these lines of code so I'm just refactoring right now and then I'm going to

296
00:21:26,680 --> 00:21:32,320
take the same lines of code that were repeated and then put them outside of the check if it is a mode

297
00:21:32,320 --> 00:21:33,120
or not.

298
00:21:33,120 --> 00:21:33,390
All right.

299
00:21:34,090 --> 00:21:36,520
So check if it is valid.

300
00:21:36,520 --> 00:21:40,700
Else if it is edit mode then we want to do this.

301
00:21:40,810 --> 00:21:46,390
If it is not it it more than we want to do that either way at the end of the day we want to see if the

302
00:21:46,400 --> 00:21:49,870
changes populate the grid and then.

303
00:21:49,900 --> 00:21:51,820
Sure analogy.

304
00:21:51,910 --> 00:21:59,520
Just make a generic message operation completed refresh to see changes and then we close.

305
00:21:59,590 --> 00:21:59,920
All right.

306
00:22:00,340 --> 00:22:05,210
So then what should happen is that when we click save on it does either operation.

307
00:22:05,350 --> 00:22:13,120
It's actually just going to populate the grid call the populate grid function in the manage in the manage

308
00:22:13,120 --> 00:22:18,880
vehicle listings window and a room without populate grid is what runs the query since the data source

309
00:22:18,880 --> 00:22:25,300
and all of the operations in between and then that should trigger the refresh off the grid.

310
00:22:25,330 --> 00:22:26,470
So let's that that's.

311
00:22:26,970 --> 00:22:27,330
All right.

312
00:22:27,330 --> 00:22:36,250
So we launch our monitors vehicle listing window I click add new car and then I'm going to see the ME

313
00:22:37,210 --> 00:22:45,940
is high on a sorry high on day i 20.

314
00:22:46,050 --> 00:23:00,090
This is twin to 19 model sorry the VIN is it just puts in something random the year is 20 18 and the

315
00:23:00,090 --> 00:23:08,330
license plate is that we click save changes it says operation is completed refresh to see changes Okay

316
00:23:08,340 --> 00:23:10,230
fine but then look at that.

317
00:23:10,290 --> 00:23:13,250
It's already refreshed for me so I can change a message.

318
00:23:13,250 --> 00:23:17,660
No I don't need to tell them to click refresh second of the refresh button there.

319
00:23:17,700 --> 00:23:23,940
But the point is that the operation would refresh the grid automatically.

320
00:23:23,990 --> 00:23:24,540
All right.

321
00:23:24,570 --> 00:23:25,620
The same for edit.

322
00:23:25,890 --> 00:23:31,770
If I say I wanted to edit this and I wanted to clean up this Vin a bit because I put in the wrong video.

323
00:23:33,570 --> 00:23:33,960
All right.

324
00:23:33,960 --> 00:23:36,340
And then save changes operation completed.

325
00:23:36,340 --> 00:23:39,310
Now you see the changed Vin.

326
00:23:39,330 --> 00:23:43,310
Going in and everything is happening real time right.

327
00:23:43,320 --> 00:23:46,560
So that's all you can do that grid refresh operation.

328
00:23:46,560 --> 00:23:48,710
So I did it with a manage vehicle listing.

329
00:23:48,780 --> 00:23:50,390
Well I didn't do it with the lead car.

330
00:23:50,390 --> 00:23:54,310
Let me make sure I did it with the lead car so I no longer have this car in my fleet.

331
00:23:54,310 --> 00:23:55,090
In fact delete.

332
00:23:55,110 --> 00:23:58,060
You see that nothing happened so delete.

333
00:23:58,080 --> 00:23:58,890
Nothing happens.

334
00:23:58,890 --> 00:24:03,500
No visual cue of anything but if I refresh you'll see that it disappears.

335
00:24:03,600 --> 00:24:04,110
All right.

336
00:24:04,800 --> 00:24:07,320
If I tried to delete again I would have gotten an error.

337
00:24:07,650 --> 00:24:15,790
So what we want to do then is make sure that our delete function tells us that the operation was successful.

338
00:24:15,840 --> 00:24:18,480
And it refreshes at the same time.

339
00:24:18,510 --> 00:24:21,420
You mean you want to give them a yes or no.

340
00:24:21,420 --> 00:24:24,210
Are you sure you want to delete kind of prompt.

341
00:24:24,300 --> 00:24:29,560
So I'm back in the mileage vehicle listing so initially I'd try it.

342
00:24:29,580 --> 00:24:36,100
Ah re fresh using this function but that kind of does something different from what we want to do.

343
00:24:36,130 --> 00:24:45,090
Someone to remove this and then what we're going to do is say 1 if the person clicks the delete button

344
00:24:45,360 --> 00:24:53,670
we get the the details you know we get the object and everything and then what I'm going to do is write

345
00:24:53,670 --> 00:24:57,690
some code and I wrote it quickly so I'll just explain it to you.

346
00:24:57,720 --> 00:25:03,870
So what we're doing is doing a message box that allows us to prompt the user.

347
00:25:03,870 --> 00:25:07,370
Are you sure you want to delete so when you click the delete button.

348
00:25:07,470 --> 00:25:12,960
It's going to retrieve the record is going to retrieve the idea and the record associated with the I.T.

349
00:25:12,960 --> 00:25:13,650
sorry.

350
00:25:13,650 --> 00:25:15,950
And then we're launching a dialog box.

351
00:25:15,960 --> 00:25:20,970
Now remember that the dialog box is a box that comes up that prevents you from interacting with any

352
00:25:20,970 --> 00:25:22,350
other open window right.

353
00:25:22,710 --> 00:25:28,390
So this dialog box our dialog result is the data type and object is D.R..

354
00:25:28,410 --> 00:25:34,440
That's what we're calling it and we're seeing I want a dialog results that has the value off our message

355
00:25:34,440 --> 00:25:35,330
box.

356
00:25:35,400 --> 00:25:39,760
So and then this the message we're showing are you sure you want to delete this record.

357
00:25:39,840 --> 00:25:45,410
You can put in even more details in this if you want because you already retrieved the car object sake

358
00:25:45,410 --> 00:25:51,870
and say Are you sure you want to delete the car name so to speak or the car model car make if you want

359
00:25:52,470 --> 00:25:56,220
and then this is the title of the dialog box which is delete.

360
00:25:56,370 --> 00:25:59,680
Then we see we want to show message box buttons.

361
00:25:59,700 --> 00:26:02,940
Yes no or console so when it comes up it will come up with that.

362
00:26:02,950 --> 00:26:07,490
Yes I know and I cancel button and then we're showing an icon.

363
00:26:07,500 --> 00:26:12,300
That's a warning call we're warning that we're letting them know that they're just entered the danger

364
00:26:12,300 --> 00:26:12,960
zone right.

365
00:26:13,620 --> 00:26:19,080
And then after we've prompted them we're seeing if the result is yes.

366
00:26:19,080 --> 00:26:25,440
Meaning they click the yes button then we want to proceed to remove the car.

367
00:26:25,560 --> 00:26:26,070
All right.

368
00:26:26,070 --> 00:26:33,250
And then having removed the car we can call populate grid all right.

369
00:26:33,440 --> 00:26:35,410
And a spelling error there.

370
00:26:35,540 --> 00:26:41,990
So we can call populates grid and then that should refresh our grid.

371
00:26:42,020 --> 00:26:44,410
So let's try that lead operation.

372
00:26:44,660 --> 00:26:44,960
All right.

373
00:26:44,960 --> 00:26:48,860
So we're back and our goal is to try to delete Toyota.

374
00:26:48,950 --> 00:26:52,460
I don't think Toyota has any rental records associated with it.

375
00:26:52,460 --> 00:26:58,360
I can always check so I can always just go over view the archive and I don't see anything with Toyota.

376
00:26:58,370 --> 00:27:01,480
So I shouldn't have any difficulty deleting Toyota.

377
00:27:01,610 --> 00:27:04,960
I click delete and then it's giving me that dialog box.

378
00:27:04,970 --> 00:27:06,980
Are you sure you want to delete this record.

379
00:27:06,980 --> 00:27:08,950
Yes no maybe so I click.

380
00:27:08,960 --> 00:27:09,390
Yes.

381
00:27:09,440 --> 00:27:15,010
And then boom it removes it and then it refreshes the grid automatically for me.

382
00:27:15,020 --> 00:27:16,150
All right let's try.

383
00:27:16,170 --> 00:27:17,860
Subaru also if I.

384
00:27:17,870 --> 00:27:18,350
No.

385
00:27:18,470 --> 00:27:19,500
Then nothing happens.

386
00:27:19,500 --> 00:27:19,970
Exactly.

387
00:27:19,980 --> 00:27:22,930
Cancel then nothing happens.

388
00:27:22,940 --> 00:27:27,760
But then once I click yes then it is removed.

389
00:27:27,760 --> 00:27:28,070
All right.

390
00:27:28,400 --> 00:27:32,040
So we just cleaned up our application a bit.

391
00:27:32,040 --> 00:27:34,290
We made sure that's only one window opens.

392
00:27:34,430 --> 00:27:39,470
And we also put in some grid refresh capabilities into our windows.

393
00:27:39,470 --> 00:27:41,450
So I did it with managed vehicle listing.

394
00:27:41,450 --> 00:27:47,450
I'm challenging you to try and repeat those steps with the managed rental records either way in the

395
00:27:47,450 --> 00:27:53,090
next video we're going to be checking in our code into source control I would love all the code ready

396
00:27:53,180 --> 00:28:00,350
and available and commented so you can check the repository for the completed code in case you need.