Question

I want to create my own DataGrid control. Add my project User Control and
derive it from DataGrid but it gives and error in buid.

DataGridControl.xaml.cs :
public partial class DataGridControl : DataGrid
{
…some codes
}

Error : Partial declarations of ‘DataGridControl’ must not specify different base classes .. DataGridControl.g.i.cs

I change this row public partial class DataGridControl : System.Windows.Controls.UserControl to
public partial class DataGridControl : System.Windows.Controls.DataGrid
in DataGridControl.g.i.cs file but it back againg automatically.

How can I solve this problem please help

Answer 1

If you check the DataGrid reference, you can see that it’s inheriting from Control and not UserControl, that’s why you can’t make it the way you wanted.

What you can do however, is to create a Custom Control, which is just a C# class extending DataGrid. You can then add that to your layout using a XAML namespace include, template using the default DataGrid template as a starting point and implement all the custom functionality you want in your custom class.

For more info see this tutorial: http://www.silverlightshow.net/items/Creating-a-Silverlight-Custom-Control-The-Basics.aspx