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Create DataTemplate in code behind

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野的像风
野的像风 2020-11-27 05:12

How do i add controls to datatemplates programmatically?

For Example. Below I\'ve created TextBlock and DataTemplate.

TextBlock text = new TextBlock(
3条回答
  • 眼角桃花
    眼角桃花 (楼主)
    2020-11-27 05:36

    I know it is an work-around, but I published a tip in code project (http://www.codeproject.com/Tips/808808/Create-Data-and-Control-Templates-using-Delegates) that allows you to create a data-template using a delegate. For example:

    TemplateGenerator.CreateDataTemplate(() => new TextBox());

    This will be enough to create a datatemplate that creates a new textbox. If you want a binding too, it could be written like:

    TemplateGenerator.CreateDataTemplate
(
  () =>
  {
    var result = new TextBox();
    result.SetBinding(TextBox.TextProperty, "PathForTheBinding");
    return result;
  }
);

    The code of the TemplateGenerator is the following:

    /// 
/// Class that helps the creation of control and data templates by using delegates.
/// 
public static class TemplateGenerator
{
  private sealed class _TemplateGeneratorControl:
    ContentControl
  {
    internal static readonly DependencyProperty FactoryProperty = DependencyProperty.Register("Factory", typeof(Func), typeof(_TemplateGeneratorControl), new PropertyMetadata(null, _FactoryChanged));

    private static void _FactoryChanged(DependencyObject instance, DependencyPropertyChangedEventArgs args)
    {
      var control = (_TemplateGeneratorControl)instance;
      var factory = (Func)args.NewValue;
      control.Content = factory();
    }
  }

  /// 
  /// Creates a data-template that uses the given delegate to create new instances.
  /// 
  public static DataTemplate CreateDataTemplate(Func factory)
  {
    if (factory == null)
      throw new ArgumentNullException("factory");

    var frameworkElementFactory = new FrameworkElementFactory(typeof(_TemplateGeneratorControl));
    frameworkElementFactory.SetValue(_TemplateGeneratorControl.FactoryProperty, factory);

    var dataTemplate = new DataTemplate(typeof(DependencyObject));
    dataTemplate.VisualTree = frameworkElementFactory;
    return dataTemplate;
  }

  /// 
  /// Creates a control-template that uses the given delegate to create new instances.
  /// 
  public static ControlTemplate CreateControlTemplate(Type controlType, Func factory)
  {
    if (controlType == null)
      throw new ArgumentNullException("controlType");

    if (factory == null)
      throw new ArgumentNullException("factory");

    var frameworkElementFactory = new FrameworkElementFactory(typeof(_TemplateGeneratorControl));
    frameworkElementFactory.SetValue(_TemplateGeneratorControl.FactoryProperty, factory);

    var controlTemplate = new ControlTemplate(controlType);
    controlTemplate.VisualTree = frameworkElementFactory;
    return controlTemplate;
  }
}



    And it has a method for ControlTemplates too.
    
    
    
             
    
                                                        
    
            
            
    
              
                
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