validate drop downs

[Najid Hanif]

Hi, In my grid I have 2 drop downs. I would like to either change the values or not let the grid be updated depending on what has been selected in the drop downs.

For example:
If the status drop down = unassigned then the assignedto drop down also has to = unassigned.
If the status drop down = assigned then the assignedto drop down can't = unassigned.

What is the best way to go about doing this?

Thanks

[Shinu]

Hello Najid,

I am not very clear about your requirement and as far as I understood you want to set the values of second dropdown based on the selected value of the first combobox.
Here is a sample code to achieve the requirement.
C#:

<telerik:GridTemplateColumn UniqueName="ContactTitle" HeaderText="ContactTitle">
     <EditItemTemplate>
         <telerik:RadComboBox ID="RadComboBox1" AutoPostBack="true"runat="serverOnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
         </telerik:RadComboBox>
     </EditItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridTemplateColumn UniqueName="TemplateColumn">
     <EditItemTemplate>
         <telerik:RadComboBox ID="RadComboBox2"  runat="server">
         </telerik:RadComboBox>
     </EditItemTemplate>
</telerik:GridTemplateColumn>

C#:

protected void RadComboBox1_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)
   {
       RadComboBox rdcbx = (RadComboBox)o;
       GridEditableItem editedItem = rdcbx.NamingContainer as GridEditableItem;
       RadComboBox ddList = editedItem.FindControl("RadComboBox2") as RadComboBox;
       // change the data source for ddList here
        .....
   }

Please elaborate your scenario if it doesn't helps.

Thanks,
Shinu.

[Sebastian]

You may also review the implementations in these two live demos, guys:
http://demos.telerik.com/aspnet-ajax/grid/examples/programming/accessingcellsandrows/defaultcs.aspx
http://demos.telerik.com/aspnet-ajax/controls/examples/integration/gridwithtreeviewcomboboxeditors/defaultcs.aspx?product=grid

Greetings,
Sebastian
the Telerik team

[Najid Hanif]

Sorry this does not help much. Let me put it this may. How can I code this:

OnSelectedIndexChanged
If value of dropdown1 == "X" then Update selection of dropdown2 to "X"

Note: I don't need to repopulate the drop down contents based on selection.

[Princy]

Hello Najid,

You can set the selectedvalue as follows.
C#:

protected void RadCombobox1_SelectedIndexChanged(object sender, RadComboBoxSelectedIndexChangedEventArgs e)
   {
       RadComboBox rdcbx = (RadComboBox)sender;
       GridEditableItem editedItem = rdcbx.NamingContainer as GridEditableItem;
       RadComboBox ddList = editedItem.FindControl("RadCombobox2") as RadComboBox;
       if (rdcbx.SelectedValue == "2")//sample value
       {
           ddList.SelectedValue = "2";
       }
   }

Thanks,
Princy.