[Solved] Help me!

[Dao]

Operations with MS DropDownList in EditItemTemplate of GridTemplateColumn
After clicking edit, the data in the label does not show on RadGrid.
I must Comment
        //else if (e.Item is GridDataItem && !e.Item.IsInEditMode && Page.IsPostBack)
       //{
         //  GridDataItem item = e.Item as GridDataItem;
         //  Label label = item.FindControl("Label1") as Label;
           // update the label value
         //  label.Text = Session["updatedValue"];
     //  }
Run Ok,
But SelectValue DropDownList not good. :(
I have two rows and two Droplist value. When I Select Value 1 is not always the default Select Value is the value 2 in Session.
Pls

[Shinu]

Hi Dao,

When using dropdownlist in EditItemTemplate, you can save the selected value in a Session variable and then set that value for the label in ItemTemplate. The same Session variable can be used to select the default item in the dropdown control on subsequent editing. Can you confirm that you are storing correct values in the session variable?

-Shinu.

[Dao]

Hi Shinu
  view code:

<telerik:radgrid id="RadGrid1" runat="server" AutoGenerateColumns="False">
           <MasterTableView>
              <Columns>
                 <telerik:GridBoundColumn UniqueName="ContactName" ReadOnly="True" HeaderText="ContactName"
                   DataField= "ContactName" />
                 <telerik:GridTemplateColumn UniqueName="TemplateColumn" HeaderText="Country">
                    <ItemTemplate>
                       <asp:Label id="Label1" runat="server">
                          <%# DataBinder.Eval(Container.DataItem, "Country") %>
                       </asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                       <asp:DropDownList id="ddl" runat="server" />
                    </EditItemTemplate>
                 </telerik:GridTemplateColumn>
                 <telerik:GridEditCommandColumn UniqueName="EditCommandColumn" />
              </Columns>
           </MasterTableView>
</telerik:radgrid>

    protected void RadGrid1_UpdateCommand(object source, GridCommandEventArgs e)
    {
        GridEditableItem UpdateItem = e.Item as GridEditableItem;
        DropDownList list = UpdateItem.FindControl("ddl") as DropDownList;
        Session["updatedValue"] = list.SelectedValue;
        //any code here
    }

As for example in http://www.telerik.com/help/aspnet-ajax/grdoperationswithdropdownlistinedititemtemplate.html

Value is saved after clicking Update. But I want to get value and save the session when clicking the Edit button.

Help :(

[Dao]

 Peoples help me. Or can show me how nearly identical to that you find elsewhere.

[Dao]

I found on google but found no one do this.

As for example in http://www.telerik.com/help/aspnet-ajax/grdoperationswithdropdownlistinedititemtemplate.html
Data is compared when click on Update. It is not necessary. I do not want to follow as Telerik sqlDataSource do.

So someone help me. Shinu you say:

"When using dropdownlist in EditItemTemplate, you can save the selected value in a Session variable and then set the value for that label in ItemTemplate. The same Session variable can be used to select the default item in the dropdown control on subsequent editing. Can you confirm that you are storing the correct values in session variable? "

So please show me demo your code.

Try,try,retry hic :(

[Shinu]

Hi Dao,

I guess you are not able to set the selecteditem in dropdown at the first time after clicking the Edit button. If so, you can get the value of label by using GetDataKeyValue() method and set as the dropdown selected item. Can you try following code snippet and see whether it is working fine for you?

CS:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
    if (e.Item is GridEditFormItem && e.Item.IsInEditMode)
    {
        GridEditFormItem item = e.Item as GridEditFormItem;
        // access/modify the edit item template settings here
        DropDownList list = item.FindControl("List1") as DropDownList;
        list.DataSource = Country_values;
        list.DataBind();
        if (Session["updatedValue"] != null)
        {
            list.SelectedValue = Session["updatedValue"].ToString();
        }
        else
        {
            // Get the griddataitem and set the selected value initially
            GridDataItem dataItem = (GridDataItem)item.ParentItem;
            list.SelectedValue = dataItem.GetDataKeyValue("Country").ToString(); // Set the selected value initially
        }
    }
    . . .
}

Note: Set the DataKeyNames of Radgrid MasterTableView as "Country".

Thanks,
Shinu.