GridDropDownColumn in EditMode

[Furqan]

In my RadGrid, I am creating columns dynamically in code behind. One column is a GridDropDownColumn which is created as follows.

GridDropDownColumn columnn = new GridDropDownColumn();
TRG.MasterTableView.Columns.Add(columnn);

columnn.ListDataMember = "Department";
columnn.DataField = "Id";
columnn.ListTextField = "Name";
columnn.ListValueField = "Id";
columnn.DropDownControlType = GridDropDownColumnControlType.RadComboBox;
columnn.UniqueName = "Department";
columnn.HeaderText = "Department";

ListDataMemeber is set to corresponding table name in DataSet to which the RadGrid is bound.

Now, this column appears fine in as a Bound Column Display mode , and appears as a RadComboBox in Edit Mode, with correct values.

However, the issue is that the "ExtractValuesFromItem" in Radgrid_UpdateCommand doesn't get the value for this GridDropDownColumn.

protected void MyGrid_UpdateCommand(object sender, Telerik.Web.UI.GridCommandEventArgs e)

{

    Hashtable NewData = new Hashtable();

    e.Item.OwnerTableView.ExtractValuesFromItem(NewData, (GridEditableItem)e.Item);

}


If there are total 12 columns in my RadGrid, then, there are 11 in "NewData" hashtable, and the GridDropDownColumn's value is missing.

What is the correct way to achieve this?


[Maria Ilieva]

Hello,

Note that normally the ExtractValuesFromItem method is used in the ItemCommand event when performing manual updates as shown in this help topic. Also another option of getting the newly entered values would be to access the controls inside the particular item and get there values manually as shown in this help topic (section "Accessing the value of cells in edit mode").
It will be helpful if you could post the whole page and code behind so we can have a better idea of how you use this code.

All the best,
Maria Ilieva
the Telerik team

[Furqan]

Thanks a lot Telerik team,

I got this resolved by accessing cells manually as shown at http://www.telerik.com/help/aspnet-ajax/grid-accessing-cells-and-rows.html.

Thanks

[Brian]

I am running into this as well.  Even though this can be solved manually, I would like to know why it doesn't work with GridDropDownColumn and RadDropDownList.  It seems dropdowns don't get returned with:
     e.Item.OwnerTableView.ExtractValuesFromItem(NewData, (GridEditableItem)e.Item);

[Brian]

Ok, I figured out the difference.  In the edit form template, I was using <%# DataBinder.Eval(Container, "DataItem.SITEID")%> which was being return in the NewData hashtable. Changing it to <%# Bind("SITEID") %> made it work.  Somehow behind the scenes, ExtractValuesFromItem sees the field via the "Bind()".

 

The non-working example:

 <telerik:RadDropDownList ID="rddSiteId" TabIndex="3" runat="server" DataValueField="SITEID" DataTextField="SITENAME" DropDownHeight="300px" DataSourceID="ObjectDataSource_Sites" Style='<%# (Container is GridEditFormInsertItem) ? "": "display:none;" %>' SelectedValue='<%# DataBinder.Eval(Container, "DataItem.SITEID")%>'></telerik:RadDropDownList>

 

The working example:

<telerik:RadDropDownList ID="rddSiteId" TabIndex="3" runat="server" DataValueField="SITEID" DataTextField="SITENAME" DropDownHeight="300px" DataSourceID="ObjectDataSource_Sites" Style='<%# (Container is GridEditFormInsertItem) ? "": "display:none;" %>' SelectedValue='<%# Bind("SITEID") %>'></telerik:RadDropDownList>

Cheers :)