Silverlight的几个知识点

首先添加一个Grid

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1. <Gridx:Name="GTest"ShowGridLines="False"SizeChanged="GTest_SizeChanged">  </Grid> 

<Grid x:Name="GTest" ShowGridLines="False" SizeChanged="GTest_SizeChanged" ></Grid>

1. Grid动态添加新的列和行。

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1. this.GTest.RowDefinitions.Add(new RowDefinition() {Height=new GridLength(30) }); 
2. this.GTest.ColumnDefinitions.Add(new ColumnDefinition() { Width =new GridLength(1, GridUnitType.Star) }); 

this.GTest.RowDefinitions.Add(new RowDefinition() {Height=new GridLength(30) });this.GTest.ColumnDefinitions.Add(new ColumnDefinition() { Width = new GridLength(1, GridUnitType.Star) });

2. 为Grid动态添加Border的样式。

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1. Border tempBorder =new Border(); 
2. tempBorder.BorderThickness =new Thickness(1); 
3. tempBorder.BorderBrush =new SolidColorBrush(Colors.Red); 
4. tempBorder.SetValue(Grid.ColumnProperty, 1); 
5. tempBorder.SetValue(Grid.ColumnSpanProperty, 2); 
6. this.GTest.Children.Add(tempBorder); 

Border tempBorder = new Border();tempBorder.BorderThickness = new Thickness(1);tempBorder.BorderBrush = new SolidColorBrush(Colors.Red);tempBorder.SetValue(Grid.ColumnProperty, 1);tempBorder.SetValue(Grid.ColumnSpanProperty, 2);this.GTest.Children.Add(tempBorder);

3. 动态添加Button及Button的背景图片。

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1. // Add new button 
2.                Button btnNew =new Button(); 
3.                ImageBrush imageBrush =new ImageBrush(); 
4.                imageBrush.ImageSource =new BitmapImage(new Uri(@"../Images/New.gif", UriKind.Relative)); 
5.                btnNew.Background = imageBrush; 
6.                btnNew.Width = 20; 
7.                btnNew.Height = 20; 
8.                btnNew.SetValue(Grid.ColumnProperty, 0); 
9.                btnNew.SetValue(Grid.RowProperty, iContentStart); 
10.                btnNew.Click +=new RoutedEventHandler(btnNew_Click); 
11.                titlePanel.Children.Add(btnNew); 

// Add new button Button btnNew = new Button(); ImageBrush imageBrush = new ImageBrush(); imageBrush.ImageSource = new BitmapImage(new Uri(@"../Images/New.gif", UriKind.Relative)); btnNew.Background = imageBrush; btnNew.Width = 20; btnNew.Height = 20; btnNew.SetValue(Grid.ColumnProperty, 0); btnNew.SetValue(Grid.RowProperty, iContentStart); btnNew.Click += new RoutedEventHandler(btnNew_Click); titlePanel.Children.Add(btnNew);

4. 鼠标移动事件。

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1. Rectangle rec =new Rectangle(); 
2.             rec.Stroke =new SolidColorBrush(Colors.Black); 
3.             rec.Fill =new SolidColorBrush(Colors.Orange); 
4.             rec.MouseLeftButtonDown +=new MouseButtonEventHandler(rec_MouseLeftButtonDown); 
5.             rec.MouseLeftButtonUp +=new MouseButtonEventHandler(rec_MouseLeftButtonUp); 
6.             rec.MouseMove +=new MouseEventHandler(rec_MouseMove); 
7.  
8. // Mouse Down Method 
9.        private void rec_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) 
10.         { 
11.             FrameworkElement element = senderas FrameworkElement; 
12.             mousePosition = e.GetPosition(null); 
13.             trackingMouseMove =true; 
14.  
15.            if (null != element) 
16.             { 
17.                 element.CaptureMouse(); 
18.                 element.Cursor = Cursors.Hand; 
19.             } 
20.             
21.         } 
22.  
23. // Mouse Move Method 
24. privatevoid rec_MouseMove(object sender, MouseEventArgs e) 
25. { 
26. FrameworkElement element = senderas FrameworkElement; 
27.    if (trackingMouseMove) 
28.     { 
29.        double deltaV = e.GetPosition(null).Y - mousePosition.Y; 
30.         double deltaH = e.GetPosition(null).X - mousePosition.X; 
31.        double newTop = deltaV + (double)element.GetValue(Canvas.TopProperty); 
32.         double newLeft = deltaH + (double)element.GetValue(Canvas.LeftProperty); 
33.  
34.         element.SetValue(Canvas.TopProperty, newTop); 
35.         element.SetValue(Canvas.LeftProperty, newLeft); 
36.  
37.         mousePosition = e.GetPosition(null); 
38.     } 
39. } 
40. // Mouse Move Method 
41.        private void rec_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) 
42.         { 
43.             FrameworkElement element = senderas FrameworkElement; 
44.  
45.             Canvas.SetTop(element, 15); 
46.              
47.             trackingMouseMove =false; 
48.             element.ReleaseMouseCapture(); 
49.  
50.             mousePosition.X = mousePosition.Y = 0; 
51.             element.Cursor =null; 
52.  
53.            if (pop != null) 
54.             { 
55.                 pop.IsOpen =false; 
56.             } 
57.  
58.            // Update the datebase 
59.         } 

Rectangle rec = new Rectangle(); rec.Stroke = new SolidColorBrush(Colors.Black); rec.Fill = new SolidColorBrush(Colors.Orange); rec.MouseLeftButtonDown +=new MouseButtonEventHandler(rec_MouseLeftButtonDown); rec.MouseLeftButtonUp += new MouseButtonEventHandler(rec_MouseLeftButtonUp); rec.MouseMove += new MouseEventHandler(rec_MouseMove);// Mouse Down Method private void rec_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { FrameworkElement element = sender as FrameworkElement; mousePosition = e.GetPosition(null); trackingMouseMove = true; if (null != element) { element.CaptureMouse(); element.Cursor = Cursors.Hand; } }// Mouse Move Method private void rec_MouseMove(object sender, MouseEventArgs e){FrameworkElement element = sender as FrameworkElement; if (trackingMouseMove) { double deltaV = e.GetPosition(null).Y - mousePosition.Y; double deltaH = e.GetPosition(null).X - mousePosition.X; double newTop = deltaV + (double)element.GetValue(Canvas.TopProperty); double newLeft = deltaH + (double)element.GetValue(Canvas.LeftProperty); element.SetValue(Canvas.TopProperty, newTop); element.SetValue(Canvas.LeftProperty, newLeft); mousePosition = e.GetPosition(null); }}// Mouse Move Method private void rec_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { FrameworkElement element = sender as FrameworkElement; Canvas.SetTop(element, 15); trackingMouseMove = false; element.ReleaseMouseCapture(); mousePosition.X = mousePosition.Y = 0; element.Cursor = null; if (pop != null) { pop.IsOpen = false; } // Update the datebase } 

5, Grid的形状改变的时候，去改变Grid的类似那些Canvas控件的形状。

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1. // First Remove the control in the Grid and ReBuild those controls that have been removed 
2.         private void GTest_SizeChanged(object sender, SizeChangedEventArgs e) 
3.         { 
4.             List<UIElement> controlsToRemove =new List<UIElement>(); 
5.            int RowsCount = this.GTest.RowDefinitions.Count; 
6.  
7.            for (int i = 2; i < RowsCount; i++) 
8.             { 
9.                 controlsToRemove = (from pControlin GTest.Children 
10.                                     where (i == (int)pControl.GetValue(Grid.RowProperty)) 
11.                                     select pControl).ToList<UIElement>(); 
12.  
13.                for (int j = 0; j < controlsToRemove.Count; j++) 
14.                 { 
15.                     GTest.Children.Remove(controlsToRemove[j]); 
16.                 } 
17.  
18.                this.GTest.RowDefinitions.Remove(this.GTest.RowDefinitions[2]); 
19.             } 
20.  
21.             BuildTR(postCollection); 
22.         } 

// First Remove the control in the Grid and ReBuild those controls that have been removed private void GTest_SizeChanged(object sender, SizeChangedEventArgs e) { List<UIElement> controlsToRemove = new List<UIElement>(); int RowsCount = this.GTest.RowDefinitions.Count; for (int i = 2; i < RowsCount; i++) { controlsToRemove = (from pControl in GTest.Children where (i == (int)pControl.GetValue(Grid.RowProperty)) select pControl).ToList<UIElement>(); for (int j = 0; j < controlsToRemove.Count; j++) { GTest.Children.Remove(controlsToRemove[j]); } this.GTest.RowDefinitions.Remove(this.GTest.RowDefinitions[2]); } BuildTR(postCollection); }

6，利用WebService异步操作后台数据。

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1.        private void UserControl_Loaded(object sender, RoutedEventArgs e) 
2.         { 
3.             BuildTRYear(); 
4.             BuildTRMonth(); 
5.  
6.             BlogWebServiceSoapClient client =new BlogWebServiceSoapClient(); 
7.             client.GetPostsCompleted +=new EventHandler<GetPostsCompletedEventArgs>(client_GetPostsCompleted); 
8.             client.GetPostsAsync(); 
9.         } 
10.  
11. privatevoid client_GetPostsCompleted(object sender, GetPostsCompletedEventArgs e) 
12.         { 
13.            if (e.Error == null) 
14.             { 
15.                 postCollection = e.Result; 
16.                 BuildTR(postCollection); 
17.             } 
18.         } 

private void UserControl_Loaded(object sender, RoutedEventArgs e) { BuildTRYear(); BuildTRMonth(); BlogWebServiceSoapClient client = new BlogWebServiceSoapClient(); client.GetPostsCompleted +=new EventHandler<GetPostsCompletedEventArgs>(client_GetPostsCompleted); client.GetPostsAsync(); }private void client_GetPostsCompleted(object sender, GetPostsCompletedEventArgs e) { if (e.Error == null) { postCollection = e.Result; BuildTR(postCollection); } }

7，怎样去创建一个PopUp对话框，并设置他的位置和样式，以下代码是我写的一个popup类，用户就可以New一个，然后传入参数

contentTxt就是popup要显示的内容，xOffsite，yOffsite距离父控件的位置，canvas，父控件，这个popup不具有通用行，但是很好改，就可以去适合自己的popup对话框。

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1. publicclass ContentPop 
2.   { 
3.      private string content =string.Empty; 
4.  
5.      private bool isAdd =true; 
6.  
7.      public bool IsAdd 
8.       { 
9.          get { return isAdd; } 
10.          set { isAdd = value; } 
11.       } 
12.  
13.      public string Content 
14.       { 
15.          get { return content; } 
16.          set 
17.           { 
18.               content = value; 
19.              if (thisPopUp.Child != null) 
20.               { 
21.                   thisPopUp.Child =null; 
22.                   AddContent(content); 
23.               } 
24.           } 
25.       } 
26.       private bool isOpen = false; 
27.  
28.       public bool IsOpen 
29.       { 
30.          get { return isOpen; } 
31.          set 
32.           { 
33.               isOpen = value; 
34.               thisPopUp.IsOpen = isOpen; 
35.           } 
36.       } 
37.      private Popup thisPopUp = null; 
38.  
39.      public Popup ThisPopUp 
40.       { 
41.          get { return thisPopUp; } 
42.       } 
43.      private double xOffsite; 
44.  
45.      public double XOffsite 
46.       { 
47.          get { return xOffsite; } 
48.          set 
49.           { 
50.               xOffsite = value; 
51.               thisPopUp.HorizontalOffset = xOffsite; 
52.           } 
53.       } 
54.       private double yOffsite; 
55.  
56.       public double YOffsite 
57.       { 
58.          get { return yOffsite; } 
59.          set 
60.           { 
61.               yOffsite = value; 
62.               thisPopUp.VerticalOffset = yOffsite; 
63.           } 
64.       } 
65.  
66.       private Canvas parantCanvas; 
67.  
68.       public Canvas ParantCanvas 
69.       { 
70.          get { return parantCanvas; } 
71.          set 
72.           { 
73.               parantCanvas = value; 
74.               parantCanvas.Children.Add(thisPopUp); 
75.           } 
76.       } 
77.      private Border border = null; 
78.  
79.      public ContentPop(string content,double xOffsite,double yOffsite,Canvas canvas) 
80.       { 
81.           thisPopUp =new Popup(); 
82.  
83.           AddContent(content); 
84.  
85.           canvas.Children.Add(thisPopUp); 
86.           thisPopUp.HorizontalOffset = xOffsite; 
87.           thisPopUp.VerticalOffset = xOffsite; 
88.  
89.           thisPopUp.IsOpen =true; 
90.  
91.          this.content = content; 
92.          this.xOffsite = xOffsite; 
93.          this.yOffsite = yOffsite; 
94.          this.isOpen = true; 
95.       } 
96.  
97.      private void AddContent(string content) 
98.       { 
99.          if (thisPopUp.Child == null) 
100.           { 
101.               border =new Border(); 
102.               border.BorderBrush =new SolidColorBrush(Colors.Black); 
103.               border.BorderThickness =new Thickness(0); 
104.  
105.               StackPanel panel1 =new StackPanel(); 
106.  
107.               TextBlock textblock1 =new TextBlock(); 
108.               textblock1.Text = content; 
109.               textblock1.Opacity = 100; 
110.               panel1.Children.Add(textblock1); 
111.               border.Child = panel1; 
112.  
113.               thisPopUp.Child = border; 
114.           } 
115.       } 
116.   }