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GridViewComboBoxColumn in hierarchic GridView

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Bruno
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Bruno asked on 08 Mar 2011, 10:02 AM

Hello,

I am new at using Telerik products.

I am using a GridView with Hierarchic levels.
I am trying to add a combo box in it, so I created a GridViewComboBoxColumn object , and added it to the GridView like this :

myGridView.MasterGridViewTemplate.Columns.Add(myComboBoxColumn);  and it works.

But now, I want to add the combo to the hierachical second level on the GridView, something like that :

myGridView.MasterGridViewTemplate.ChildGridViewTemplates.Insert(4,myComboBoxColumn);

but I get an error message telling that a GridViewComboBoxColumn object is not assignable to a GridViewTemplate.

So please can you tell me how I could add the GridViewComboBoxColumn to the GridView at this level ?

Thank you.

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Emanuel Varga
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answered on 08 Mar 2011, 11:34 AM
Hello Bruno,

You can add any column to the GridViewTemplates collection like so:
var comboBoxColumn = new GridViewComboBoxColumn();
radGridView1.Templates[0].Columns.Add(comboBoxColumn);

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga
Telerik WinForms MVP
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Bruno
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answered on 08 Mar 2011, 12:24 PM

Thank you for your answer.

Now I can add the field to the grid, but when added, it doesn't react like a combo box, but just like an empty text box (???)
When I tried to add it to the higher level of the GridView (just for a test), it worked perfectly like a combo box.

Here is the code I use for adding the combo to the templates level of the GridView :

 

 

 

 

var myCombo= new GridViewAdvComboBoxColumn
            {
                FieldName = "MyValues",
                HeaderText = "Valeurs",
                MinWidth = 150,
                MaxWidth = 150,
                UniqueName = "MyValues",
                Width = 150,
                DataSource = SessionTabParent.AssociatedSession.InvoicingController.GetDataById(myId),
                DisplayMember = "myLabel",
                ValueMember = "myLabel"
            };
  
           myGridView.MasterGridViewTemplate.ChildGridViewTemplates[0].Columns.Add(myCombo);

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Bruno
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answered on 08 Mar 2011, 02:47 PM

Sorry, it seems that my GridView was in read-only mode, and that's why the Combo appeared like an empty textbox.
Now it works, but the dropdown part is not visible until I click on the combo field.

Is there a way to make it graphically obvious that it is a combo box, even when no clicking at it ?
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Emanuel Varga
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answered on 08 Mar 2011, 03:18 PM
Hello again,

No, sorry, this is the default behavior for a combo box in the grid.

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga
Telerik WinForms MVP
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Alexander
Telerik team
answered on 10 Mar 2011, 04:27 PM
Hello Bruno,

Thank you for your question.

As Emanuel said, the default behavior of GridViewComboBoxColumn is to show the DropDownList editor only in edit mode. You can create a Custom Cell to customize the cell elements and appearance according to your requirements.

I hope it helps.

Best wishes,
Alexander
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Bruno
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Emanuel Varga
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Bruno
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Alexander
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