Hi,

What is the correct way to sbuclass a datagrid that we want to use in the
designer that includes default columns?

I am trying to create a control that inherits from DataGrid and performs
some standard manipulation (such as creating default columns)....



public class MyGrid : System.Windows.Forms.DataGrid



I add columns either with the designer or on the constructor:


//
// dataGridTableStyle
//
this.dataGridTableStyle.DataGrid = this;
this.dataGridTableStyle.GridColumnStyles.AddRange(new    
System.Windows.Forms.DataGridColumnStyle[] {this.dataGridNameColumn});
this.dataGridTableStyle.MappingName = "ArrayList";
//
// dataGridNameColumn
//
this.dataGridNameColumn.HeaderText = "Name";
this.dataGridNameColumn.MappingName = "Name";


Now, if I add my grid to the ToolBox and add it to a form, a new instance
of the GridTableSytle and and GridColumnStyle is created in the form.  I
get an error because I now have 2 TableStyles with the same MappingName. 
If I delete the TableStyle collection from the designer then it then works
ok and only the instance created on the class is used.

Thanks,

Jeronimo Bertran

Hi Jeronimo,

Welcome to ASPNET newsgroup.
Regarding on the problem you mentioned, it seems related to winform
control's Design-time developing. Based on my understanding , ASP.NET's
datagrid control is much different from the winform datagrid, they have
different underlying mechanism and design-time support. So if convenient ,I
suggest you repost the quesiton in

public.dotnet.framework.windowsforms newsgroup or its sub groups.

Thanks,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)

Yes, it has to do with the WinForms control... I didn't notice the aspnet
part on the newsgroup name.

Thanks,

Nevermind Jeronimo,

If you have any question on webform developing, please feel free to post in
ASPNET group. We'll be glad to
assist you.   :--)

Thanks,

Steven Cheng
Microsoft Online Support

Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)

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