Warning: file_get_contents(/data/phpspider/zhask/data//catemap/4/wpf/14.json): failed to open stream: No such file or directory in /data/phpspider/zhask/libs/function.php on line 167

Warning: Invalid argument supplied for foreach() in /data/phpspider/zhask/libs/tag.function.php on line 1116

Notice: Undefined index: in /data/phpspider/zhask/libs/function.php on line 180

Warning: array_chunk() expects parameter 1 to be array, null given in /data/phpspider/zhask/libs/function.php on line 181
C# 如何在ControlTemplate中声明事件处理程序?_C#_Wpf - Fatal编程技术网

C# 如何在ControlTemplate中声明事件处理程序?

C# 如何在ControlTemplate中声明事件处理程序?,c#,wpf,C#,Wpf,我有以下控制模板: <ControlTemplate> <Grid VerticalAlignment="Stretch" HorizontalAlignment="Left" Width="400"> <Grid.ColumnDefinitions> <ColumnDefinition Width="18" /> <ColumnDefinition Width="20*

我有以下
控制模板

<ControlTemplate>
    <Grid VerticalAlignment="Stretch" HorizontalAlignment="Left" Width="400">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="18" />
            <ColumnDefinition Width="20*" />
            <ColumnDefinition Width="20*" />
            <ColumnDefinition Width="20*" />
            <ColumnDefinition Width="45" />
        </Grid.ColumnDefinitions>
        <TextBox Grid.Column="1" Template="{StaticResource watermark}" HorizontalAlignment="Stretch" Margin="4,0,0,4" Tag="Number" />
        <TextBox Grid.Column="2" Template="{StaticResource watermark}" HorizontalAlignment="Stretch" Margin="4,0,0,4" Tag="Login" />
        <TextBox Grid.Column="3" Template="{StaticResource watermark}" HorizontalAlignment="Stretch" Margin="4,0,0,4" Tag="Password" />
        <Button Grid.Column="4" HorizontalAlignment="Stretch" Content="Add" Margin="4,0,0,4" Click="AddUser_Click"/>
    </Grid>
</ControlTemplate>

如何写入
AddUser\u单击
以访问文本框
Text
属性


upd:我只是想说清楚。我知道如何连接
单击此处的事件处理程序。问题是如何读取其中文本框的内容,因为我无法给它们命名,因为它们位于模板中

你能做的就是给按钮起个名字“PART_Button”。然后重写控件中的OnApplyTemplate方法。在代码中,您可以

var btn = this.Template.FindName("PART_Button", this) as Button;
btn.Click += ...

在当前文件的指令所指向的类中搜索事件处理程序,这允许您内联添加事件处理程序,而无需费心重写该类,并通过添加处理程序来重写,而不管您声明ControlTemplate的位置如何

MainWindow.xaml:

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
  <Button Content="asdf">
    <Button.Style>
      <Style TargetType="Button">
        <Setter Property="Template">
          <Setter.Value>
            <ControlTemplate TargetType="Button">
              <Button Content="{TemplateBinding Content}" Click="Button_Click"/>
            </ControlTemplate>
          </Setter.Value>
        </Setter>
      </Style>
    </Button.Style>
  </Button>
</Window>

MainWindow.xaml.cs:

using System.Windows;
namespace WpfApplication1
{
  /// <summary>
  /// Interaction logic for MainWindow.xaml
  /// </summary>
  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
      MessageBox.Show("Button clicked!");
    }
  }
}
使用System.Windows;
命名空间WpfApplication1
{
/// 
///MainWindow.xaml的交互逻辑
/// 
公共部分类主窗口:窗口
{
公共主窗口()
{
初始化组件();
}
私有无效按钮\u单击(对象发送者,路由目标e)
{
MessageBox.Show(“单击按钮!”);
}
}
}

如果您有权访问templatedparent(选择EdItem、FindVisualParent等),则可以在文本框中应用名称。ControlTemplate用于ComboBoxItem的示例

private void AddUser_Click(object sender, RoutedEventArgs e)
{
    ComboBoxItem comboBoxItem = GetVisualParent<ComboBoxItem>(button);
    TextBox textBox = comboBoxItem.Template.FindName("numberTextBox", comboBoxItem) as TextBox;
    //...
}
private void AddUser\u单击(对象发送者,路由目标)
{
ComboBoxItem ComboBoxItem=GetVisualParent(按钮);
TextBox TextBox=comboBoxItem.Template.FindName(“numberTextBox”,comboBoxItem)作为TextBox;
//...
}
获取ControlTemplate中文本框的另一种方法是使用可视化树。像这样的

private void AddUser_Click(object sender, RoutedEventArgs e)
{
    Button button = sender as Button;
    Grid parentGrid = GetVisualParent<Grid>(button);
    List<TextBox> textBoxes = GetVisualChildCollection<TextBox>(parentGrid);
    foreach (TextBox textBox in textBoxes)
    {
        if (textBox.Tag == "Number")
        {
            // Do something..
        }
        else if (textBox.Tag == "Login")
        {
            // Do something..
        }
        else if (textBox.Tag == "Password")
        {
            // Do something..
        }
    }
}
private void AddUser\u单击(对象发送者,路由目标)
{
按钮按钮=发送器为按钮;
Grid parentGrid=GetVisualParent(按钮);
列表文本框=GetVisualChildCollection(父网格);
foreach(文本框中的文本框)
{
如果(textBox.Tag==“数字”)
{
//做点什么。。
}
else if(textBox.Tag==“登录”)
{
//做点什么。。
}
else if(textBox.Tag==“密码”)
{
//做点什么。。
}
}
}
以及GetVisualParent和GetVisualChildCollection的实现

public static T GetVisualParent<T>(object childObject) where T : Visual
{
    DependencyObject child = childObject as DependencyObject;
    // iteratively traverse the visual tree
    while ((child != null) && !(child is T))
    {
        child = VisualTreeHelper.GetParent(child);
    }
    return child as T;
}

public static List<T> GetVisualChildCollection<T>(object parent) where T : Visual
{
    List<T> visualCollection = new List<T>();
    GetVisualChildCollection(parent as DependencyObject, visualCollection);
    return visualCollection;
}
private static void GetVisualChildCollection<T>(DependencyObject parent, List<T> visualCollection) where T : Visual
{
    int count = VisualTreeHelper.GetChildrenCount(parent);
    for (int i = 0; i < count; i++)
    {
        DependencyObject child = VisualTreeHelper.GetChild(parent, i);
        if (child is T)
        {
            visualCollection.Add(child as T);
        }
        else if (child != null)
        {
            GetVisualChildCollection(child, visualCollection);
        }
    }
}
publicstatict GetVisualParent(objectchildobject),其中T:Visual
{
DependencyObject子对象=作为DependencyObject的子对象;
//迭代遍历可视化树
while((child!=null)&&&!(child是T))
{
child=visualtreeheloper.GetParent(child);
}
返回子对象作为T;
}
公共静态列表GetVisualChildCollection(对象父对象),其中T:Visual
{
List visualCollection=新列表();
GetVisualChildCollection(父对象作为DependencyObject,visualCollection);
返回视觉采集;
}
私有静态void GetVisualChildCollection(DependencyObject父对象,列出visualCollection),其中T:Visual
{
int count=VisualTreeHelper.GetChildrenCount(父级);
for(int i=0;i
我没有幸运地找到我的复选框PART\u checkbox,带有

 this.Template.FindName("control name", this)
方法 但是

成功了

“资源字典”存根

<Style x:Key="OGrid" TargetType="{x:Type local:OrientationGrid}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:OrientationGrid}" x:Name="PART_Control">
                    <CheckBox  x:Name="PART_CheckBox"/>
                            ...
答案基于:

<Style x:Key="OGrid" TargetType="{x:Type local:OrientationGrid}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type local:OrientationGrid}" x:Name="PART_Control">
                    <CheckBox  x:Name="PART_CheckBox"/>
                            ...
    public override void OnApplyTemplate()
    {
        base.OnApplyTemplate();
        CheckBox chkbx = GetTemplateChild("PART_CheckBox") as CheckBox;
        chkbx.Checked += Chkbx_Checked;
    }

    private void Chkbx_Checked(object sender, RoutedEventArgs e)
    {
        MessageBox.Show("Event Raised");
    }
    ...