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Grid Edit Mode DDL

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Mark
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Mark asked on 03 Dec 2013, 10:39 PM
Is there any way to replace a text box in edit mode with a drop down list?

Thanks,
Mark

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Princy
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answered on 04 Dec 2013, 03:43 AM
Hi Mark,

I'm not clear about your requirement, but to have DropDownList in edit mode you can use a GridTemplateColumn. Please try the below code snippet.

ASPX:
<telerik:GridTemplateColumn HeaderText="City" UniqueName="City">
    <ItemTemplate>
      <%# Eval("City") %>
    </ItemTemplate>
    <EditItemTemplate>
     <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource1" DataTextField="City" DataValueField="City">
     </asp:DropDownList>
    </EditItemTemplate>
</telerik:GridTemplateColumn>

Thanks,
Princy
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Mark
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answered on 04 Dec 2013, 01:57 PM
Princy,

Thanks for the reply.  My solution is entirely in code-behind.  I do not explicitly generate the edit forms, but allow telerik to do it instead.  I would like to override one of the text-boxes and replace it with a drop-down-list.  Something like "Title of Courtesy" in the following link:

http://demos.telerik.com/aspnet-ajax/grid/examples/data-editing/edit-form-types/defaultcs.aspx

I see that in this demo the edit form is built from the ground up.  Is there any way to just replace the text-box that is auto-generated?

Thanks,
Mark
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Princy
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answered on 05 Dec 2013, 04:33 AM
Hi Mark,

I guess, you want to make a BoundColumn which is TextBox in edit mode to a DropDownList. Please try the sample code snippet.

C#:
RadGrid grid;
protected void Page_Init(object sender, System.EventArgs e)
 {
 DefineGridStructure();
 }
private void DefineGridStructure()
 {
    grid = new RadGrid();
    grid.ID = "RadGrid1";
    grid.DataSourceID = "SqlDataSource1";
    grid.Skin = "Hay";     
    grid.AllowPaging = true;    
    grid.AutoGenerateColumns = false;
    grid.AutoGenerateEditColumn = true;
    grid.ItemCreated += new GridItemEventHandler(grid_ItemCreated);
    grid.ItemDataBound += new GridItemEventHandler(grid_ItemDataBound);   
        
    grid.MasterTableView.DataKeyNames = new string[] { "OrderID" };
 
    GridBoundColumn boundColumn = new GridBoundColumn();
    grid.MasterTableView.Columns.Add(boundColumn);
    boundColumn.DataField = "OrderID";
    boundColumn.HeaderText = "OrderID";
        
    boundColumn = new GridBoundColumn();
    grid.MasterTableView.Columns.Add(boundColumn);
    boundColumn.DataField = "ShipCity";
    boundColumn.HeaderText = "ShipCity";
    boundColumn.UniqueName = "ShipCity";       
        
    this.PlaceHolder1.Controls.Add(grid);
 }
void grid_ItemCreated(object sender, GridItemEventArgs e)
 {
    if (e.Item is GridEditableItem && e.Item.IsInEditMode)
    {
        GridEditableItem edit = (GridEditableItem)e.Item;
        TextBox txt = (TextBox)edit["ShipCity"].Controls[0];
        txt.Visible = false; //Hide the TextBox
        DropDownList dropdownlist = new DropDownList(); //Create DropDownList
        dropdownlist.ID = "dropdownlist1";
        dropdownlist.DataSourceID = "SqlDataSource2";
        dropdownlist.DataTextField = "ShipCity";
        dropdownlist.DataValueField = "ShipCity";         
        edit["ShipCity"].Controls.Add(dropdownlist);   //Add the control to the column
    }
 }
void grid_ItemDataBound(object sender, GridItemEventArgs e)
 {
    if (e.Item is GridEditableItem && e.Item.IsInEditMode)
    {
        GridEditableItem edit = (GridEditableItem)e.Item;       
        DropDownList drop = (DropDownList)edit.FindControl("dropdownlist1");
        drop.SelectedValue = DataBinder.Eval(edit.DataItem, "ShipCity").ToString(); //To set the selected value of the row
    }
 }

Thanks,
Princy
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Mark
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