Access RadDropDownList in Grid EditItemTemplate to fill it with values from a data source

[Max]

Hello everybody,

I already searched for the solution of my problem but did not find anything to work. I Build a RadGrid an bind it to a SQL Datasource. Now I want to fill the Dropdownlists in the Radgrid with values from a different code behind stored procedure. Somehow I can not access the two DropDownLists from my code behind. I would be very thankful if someone could help me out. Here is my code:

<telerik:RadGrid runat="server" ID="gridFktWipoHague" Culture="de-DE">
    <MasterTableView>
        <Columns>
            <telerik:GridBoundColumn DataField="LAND_KZ" ReadOnly="true">
            </telerik:GridBoundColumn>
            <telerik:GridTemplateColumn DataField="PMMA_Add">
                <EditItemTemplate>
                    <telerik:RadDropDownList runat="server" ID="PMMA_Add_DropDown">
                    </telerik:RadDropDownList>
                </EditItemTemplate>
            </telerik:GridTemplateColumn>
            <telerik:GridDateTimeColumn DataField="HAGUE_DATUM">
            </telerik:GridDateTimeColumn>
            <telerik:GridTemplateColumn>
                <EditItemTemplate>
                    <telerik:RadDropDownList runat="server" ID="HAGUE_Add_DropDown">
                    </telerik:RadDropDownList>
                </EditItemTemplate>
            </telerik:GridTemplateColumn>
            <telerik:GridBoundColumn DataField="HAGUE_DELETE">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn ReadOnly="true" DataField="Counter_pm">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn ReadOnly="true" DataField="Counter_ps">
            </telerik:GridBoundColumn>
            <telerik:GridCheckBoxColumn DataField="TMVIEW">
            </telerik:GridCheckBoxColumn>
        </Columns>
    </MasterTableView>
    <ExportSettings>
        <Pdf PageWidth="">
        </Pdf>
    </ExportSettings>

</telerik:RadGrid>

Thank you very much,

Max

[Princy]

Hi Max,

Please try the following code snippet to access EditItemTemplate controls from code behind.

C#:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
  if (e.Item is GridEditableItem && e.Item.IsInEditMode)
  {
   GridEditableItem editItem = (GridEditableItem)e.Item;
   //Access the RadDropDownList
   RadDropDownList rddlAdd = (RadDropDownList)editItem.FindControl("PMMA_Add_DropDown");
   rddlAdd.DataSource = //Set datasource
   //Assign the values to be displayed
   rddlAdd.DataTextField = "";
   rddlAdd.DataValueField = "";
  }
}

Thanks,
Princy

[Max]

Thank you very much for the fast answer Princy!

Now I am able to access the control. Unfortunately, although I bind a DataView as Source, the DropDownList still is displayed as empty? 
Is there an exact time in the pages loading steps when I have to fire the ItemDataBound Event?

Thank you very much again!

Max

[Max]

Dear Princy,

now I got yout solution working and switched to using a RadComboBox. All without Problem.
Now I implemented a loop to read Databank Entries and compare them with my combobox item values, when they are the same I check the box item. I want this for every combobox in every row seperately, unfortunately when the page is loaded all comboboxes in the GridView have the same items checked.

Again I would appreciate your help! Thank you very much!

[Princy]

Hi Max,

I'm not clear about your requirement, I guess you wan to bind the ComboBox with the corresponding row values. Please try the following code snippet.

ASPX:

<telerik:GridTemplateColumn HeaderText="ShipCountry">
    <ItemTemplate>
        <telerik:RadComboBox ID="rcbCountry" runat="server">
        </telerik:RadComboBox>
    </ItemTemplate>
</telerik:GridTemplateColumn>

C#:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
  if (e.Item is GridDataItem)
  {
   GridDataItem dataItem = (GridDataItem)e.Item;
   RadComboBox rcbCountry = (RadComboBox)dataItem.FindControl("rcbCountry");
   //bind combobox with data
   //set the selected value
   rcbCountry.SelectedValue = DataBinder.Eval(dataItem.DataItem, "ShipCountry").ToString();
  }
}

Thanks,
Princy

[Max]

Dear Princy,

thank you again for you answer!

What I want is to check different checkboxes and therefore entries in each row. For every row the checkbox entries are the same, only the state (checked/unchecked) of the row specific checkboxes should be differen. Here some code to make it a bit clearer:

foreach (DataRowView item in mainHagueSource)
{
    if (item["PMMA_Add"].ToString() != "")
    {
        string strAdd = item["PMMA_Add"].ToString();
        string[] strAddArray = strAdd.Split(',');

        foreach (RadComboBoxItem comboItem in comboAddPMMA.Items)
        {
            foreach (string addItem in strAddArray)
            {
                if (addItem == comboItem.Value.ToString())
                {
                    comboItem.Checked = true;
                    strPMMANumbers.Add(comboItem.Value.ToString());
                }
            }
        }
    }
}

Bye

Max

[Max]

Hello again,

I got it solved. Bad Brainbug. As you sure see from the code I checked every row in the MainDatasource for every single Combobox.....
With ID comparison everthing works fine.

Thank you very much for your help!

best regards,

Max