WPF代码注意事项,开发常见问题，知识总结

代码注意事项：

1、代码实现的样式赋值

  XXX.Style = TryFindResource("StyleName") as Style;

 

2.WPF中FindName方法的使用

　(1)简单的使用　前台代码：

"btnName"  Click= "btnName_Click" >Test Method FindName

　　后台代码:

 private void btnName_Click(object sender, RoutedEventArgs e)

{

　　Button b = FindName("btnName") as Button;

　　MessageBox.Show(b.Name);

}

（2）在模板中使用FindName方法

     "childGrid" >
         "rootBtn" >


                     "btnName"  Click= "btnName_Click" >Test Method FindName

　后台代码：

private  void  btnName_Click( object  sender, RoutedEventArgs e)
    {
        Button b = rootBtn.Template.FindName( "btnName" ,rootBtn) as  Button;
        MessageBox.Show(b.Name);
    }

3.使用多个绑定参数

"23"  Command= "{Binding AddCommand}"    Content= "计算"
                HorizontalAlignment= "Left"  Margin= "20,0,0,49"  Name= "button1"  VerticalAlignment= "Bottom"  Width= "75" >

               "{StaticResource ParameterConverter}" >
                   "Text"  ElementName= "textBox1" />
                   "Text"  ElementName= "textBox2" />

4、将代码写在XAML中

    private  void  button1_Click( object  sender, RoutedEventArgs e)
    {
        button1.Background = Brushes.Blue;
        button1.Content = "The code is in XAML" ;
        MessageBox.Show( "hi" );
    }
    ]]>
    "23"  Margin= "46,56,32,0"  Name= "button1"  VerticalAlignment= "Top"  Click= "button1_Click" >Click me!

5、各属性对应的C#代码

    5.1

　 等效代码如下：

Grid g = new  Grid();
Button b = new  Button();
b.Width = 100;
b.Height = 100;
b.Content = "Test Button" ;
b.Foreground = Brushes.LightBlue;
g.Children.Add(b);
myWindow.AddChild(g);

 6、ItemContainerGenerator.ContainerFromIndex方法的使用

TreeViewItem item = (TreeViewItem)myTreeView.ItemContainerGenerator.ContainerFromIndex(1);

7、WPF获取子控件和父控件方法　

public  class  Globals
    {
        ///
        /// 获取父控件方法。该方法将根据当前控件，遍历查找其父控件是否存在。参数1是表示当前子控件名，参数2是要查询父控件名；
        ///
        public  T GetParentObject(DependencyObject obj, string  name) where  T : FrameworkElement
        {
            DependencyObject parent = VisualTreeHelper.GetParent(obj);

            while  (parent != null )
            {
                if  (parent is  T && (((T)parent).Name == name | string .IsNullOrEmpty(name)))
                {
                    return  (T)parent;
                }

                parent = VisualTreeHelper.GetParent(parent);
            }

            return  null ;
        }

        ///
        /// 该方法将根据当前控件，遍历查找其子控件是否存在。参数1是表示当前父控件名，参数2是要查询子控件名；
        ///
        public  T GetChildObject(DependencyObject obj, string  name) where  T : FrameworkElement
        {
            DependencyObject child = null ;
            T grandChild = null ;

            for  ( int  i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
            {
                child = VisualTreeHelper.GetChild(obj, i);

                if  (child is  T && (((T)child).Name == name | string .IsNullOrEmpty(name)))
                {
                    return  (T)child;
                }
                else
                {
                    grandChild = GetChildObject(child, name);
                    if  (grandChild != null )
                        return  grandChild;
                }
            }

            return  null ;

        }

        ///
        /// 该方法将把所有子控件作为List集合返回到客户端。
        /// 其中第一个参数是父控件参数，而第二个参数是特定子控件名称，
        /// 如果需要遍历全部子控件，第二个参数留空即可。
        ///
        public  List GetChildObjects(DependencyObject obj, string  name) where  T : FrameworkElement
        {
            DependencyObject child = null ;
            List childList = new  List();

            for  ( int  i = 0; i <= VisualTreeHelper.GetChildrenCount(obj) - 1; i++)
            {
                child = VisualTreeHelper.GetChild(obj, i);

                if  (child is  T && (((T)child).Name == name || string .IsNullOrEmpty(name)))
                {
                    childList.Add((T)child);
                }

                childList.AddRange(GetChildObjects(child, "" ));
            }

            return  childList;

        }
    }

　　

XAML：

Globals VTHelper = new  Globals();
StackPanel sp = VTHelper.GetChildObject( this .LayoutRoot, "spDemoPanel" );
Grid layoutGrid = VTHelper.GetParentObject( this .spDemoPanel, "LayoutRoot" );
List textblock = VTHelper.GetChildObjects( this .LayoutRoot, "" );

　　

8.GridSplitter控件的使用：

        "90*"  />
        "Auto"  />
        "180*"  />


        "190*"  />
        "Auto"  />
        "70*"  />

    "ButtonA"  Margin= "3"  Grid.Row= "0"  Grid.Column= "0"  Grid.RowSpan= "3"  />
    "ButtonB"  Margin= "3"  Grid.Row= "0"  Grid.Column= "2"  />
    "ButtonC"  Margin= "3"  Grid.Row= "2"  Grid.Column= "2"  />
    "3"  HorizontalAlignment= "Stretch"  VerticalAlignment= "Stretch"    Grid.Row= "0"  Grid.Column= "1"  Grid.RowSpan= "3" >
    "3"  VerticalAlignment= "Stretch"  HorizontalAlignment= "Stretch"   Grid.Row= "1"  Grid.Column= "2" >

效果图:

9.UniformGrid控件中每行没列都相等

    "ButtonA"  />
    "ButtonB"  />
    "ButtonC"  />
    "ButtonD"  />
    "ButtonE"  />
    "ButtonF"  />
    "ButtonG"  />
    "ButtonH"  />

如图：

 

 

 

本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2011/09/07/2159169.html，如需转载请自行联系原作者