DataTemplate and HierarchyChildTemplate

[Eric]

Hi,

I would like to create a Grid using Hierarchy programmatically

 

radGridView.ChildTableDefinitions.Add(new GridViewTableDefinition());
var g = new FrameworkElementFactory(typeof(TextBlock));
g.SetValue(TextBlock.TextProperty, "TEST");
DataTemplate dt = new DataTemplate();
dt.VisualTree = g;
radGridView.HierarchyChildTemplate = dt;

I can developp/reduce hierarchy but nothing in details. I did the same into xaml code with success.

How to code correctly datatemplate ?

Thanks 

Regards

Eric

 

[Ivan Ivanov]

Hello,

Generally, using FrameworkElementFactory is one of the ways to create DataTemplates at runtime. Alternatively, you can use XamlReader.Load() to create DataTemplates from strings, which might be the more powerful approach, but in my opinion it is more difficult to maintain. Both techniques should be equally viable for this scenario. 
As for the code snippet that you sent, it looks good to me. You only have to add dt.Seal() before using it to initialize the HierarchyChildTemplate. Can you please confirm whether this change fixed things up?

Regards,
Ivan Ivanov
Telerik

[Eric]

Hi Ivan,

You're right, I added dt.Seal() and all work perfectly. I also tried to use xaml string with success. Here is the alternative code:

 

string dataTemplate = "<DataTemplate><TextBlock Text=\"TEST\"/></DataTemplate>";
var context = new ParserContext();
context.XamlTypeMapper = new XamlTypeMapper(new string[0]);
context.XmlnsDictionary.Add("", "http://schemas.microsoft.com/winfx/2006/xaml/presentation");
context.XmlnsDictionary.Add("x", "http://schemas.microsoft.com/winfx/2006/xaml");
context.XmlnsDictionary.Add("telerik", "http://schemas.telerik.com/2008/xaml/presentation");

var template = (DataTemplate)XamlReader.Parse(dataTemplate, context);
radGridView.HierarchyChildTemplate = template;

Regards

Eric

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