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Add GridDropDownColumn at runtime

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Bryan
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Bryan asked on 09 Dec 2008, 09:31 AM
Hello everyone,

Right now I need to add a GridDropDownColumn at runtime, not design time, and the dropdowmitem's data come from a Dictionary, the key is the item's value, the value is the item's text. How can I do it?

Part of my code looks like :

        Dictionary<stringstring> dicValues = DropdownListData as Dictionary<stringstring>;  
        if (dicValues != null)  
        {  
            GridDropDownListColumnEditor editor = gridColumn.ColumnEditor as GridDropDownListColumnEditor;  
            foreach (KeyValuePair<stringstring> value in dicValues)  
            {  
                editor.DropDownListControl.Items.Add(new ListItem(value.Value, value.Key));  
            }  
        } 

But I got nothing, when I switch to the edit model, the dropdownlist has no items. Any one know how to do this?

Thanks and Best regards,

Bryan.

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Sebastian
Telerik team
answered on 11 Dec 2008, 02:33 PM
Hello Bryan,

The built-in GridDropDownColumn is designed to be used mainly with DataTables in order to easily map and generate their dropdown items values in conjunction with the DataField/ListValueField/DataSourceID/ListDataMember values of the column.

For custom objects collections consider replacing the GridDropDownColumn with template column holding MS DropDownList in its edit template (generating/binding the items for the MS DropDownList inside the ItemDataBound handler of RadGrid). Review this topics from the documentation which elaborates on the same subject:

http://www.telerik.com/help/aspnet-ajax/grdoperationswithdropdownlistinedititemtemplate.html

How to generate columns in the grid programmatically you can see from this article.

Kind regards,
Sebastian
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