在后面的代码中加载DataTemplate时，转换器不起作用

Question

I loaded the datatemplate for image column in code behind . Please refer the below code snippet,

        FrameworkElementFactory fef = new FrameworkElementFactory(typeof(Image));
        Binding bind = new Binding() { Path=new PropertyPath(imagecolumn.MappingName),Converter = new StringToImageConverter(),Mode=BindingMode.TwoWay };         
        fef.SetBinding(Image.SourceProperty,new Binding(imagecolumn.MappingName));
        DataTemplate template = new DataTemplate() { VisualTree = fef };            
        this.imagecolumn.CellItemTemplate = template;          

But my converter is not invoked. I need to load different images in each row of the column . Am i missed anything ? Please share any idea

Answer 1

You instantiate a new Binding but you never use it. Do this:

    FrameworkElementFactory fef = new FrameworkElementFactory(typeof(Image));
    Binding bind = new Binding() { Path=new PropertyPath("MappingName"),Converter = new StringToImageConverter(),Mode=BindingMode.TwoWay,Source=imagecolumn };         
    fef.SetBinding(Image.SourceProperty, bind); // here you just created 
    //another instance of Binding instead  of using your bind variable
    DataTemplate template = new DataTemplate() { VisualTree = fef };            
    this.imagecolumn.CellItemTemplate = template;  

EDIT: Have a look at FrameworkElementFactory . In the remarks it sais:

This class is a deprecated way to programmatically create templates, which are subclasses of FrameworkTemplate such as ControlTemplate or DataTemplate; not all of the template functionality is available when you create a template using this class. The recommended way to programmatically create a template is to load XAML from a string or a memory stream using the Load method of the XamlReader class.

Maybe you should do it the recommended way.