The GridDropDownColumn is not bound under view mode

[Jin]

I have a RadGrid with GridDropDownColumn. Then I set the DataField attribute for the dropdownlist. When loading the GridView, the column display null. I don't know why it will be null.

 <telerik:GridDropDownColumn DataField="PV_TYPE" ListTextField="PV_TYPE" UniqueName="PvType" HeaderText="PV Type">
                            </telerik:GridDropDownColumn>

[Shinu]

Hi Jin,

When in browser mode, GridDropDownColumn looks and behaves like a standard GridBoundColumn. When in edit mode, however, it displays a drop-down control for each edited cell in the column. In order to bind this column type, you should set the DataSourceID property to the ID of a data source control.
aspx:

<telerik:GridDropDownColumn DataField="EmployeeID" ListTextField="EmployeeID" ListValueField="EmployeeID" DataSourceID="SqlDataSource1" ></telerik:GridDropDownColumn>

Thanks,
Shinu.

[Jin]

Thanks for your response. In fact, my problem is the  GridDropDownColumn don't show a value in View mode. As my understanding, once the DataFiled is set, it should bind a value to the GridDropDownColumn as a lable in view mode.

[Shinu]

Hi,

In order to make the GridDropDownColumn to show value in view mode, you should set DataSource as shown below.
aspx:

<telerik:GridDropDownColumn DataField="EmployeeID"  DropDownControlType="RadComboBox" ListTextField="EmployeeID" ListValueField="EmployeeID" DataSourceID="SqlDataSource1" ></telerik:GridDropDownColumn>

Also you can bind the column in edit mode as shown below.
C#:

protected void RadGrid1_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e)
{
 if (e.Item is GridEditableItem & e.Item.IsInEditMode)
 {
   GridEditableItem EditItem = (GridEditableItem)e.Item;
   RadComboBox combo = (RadComboBox)EditItem["dropdown"].Controls[0];
   combo.DataTextField = "EmployeeID";
   combo.DataValueField = "EmployeeID";
   combo.DataSourceID = "SqlDataSource1";
 }
}

Thanks,
Shinu.