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validate drop downs

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This is a migrated thread and some comments may be shown as answers.
Najid Hanif
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Najid Hanif asked on 15 Sep 2011, 11:27 PM
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

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Shinu
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answered on 16 Sep 2011, 06:40 AM
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.
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Sebastian
Telerik team
answered on 16 Sep 2011, 08:30 AM
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
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Najid Hanif
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answered on 19 Sep 2011, 08:22 PM
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.
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Princy
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answered on 20 Sep 2011, 08:37 AM
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.
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Najid Hanif
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Shinu
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Sebastian
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Najid Hanif
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Princy
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