RAD-GRID gets invisible after ajax call.

[Mohsin]

Hi Experts,

I have a radGrid on my aspx page with some input controls. 
In radGrid i have 2 columns one is GridEditCommandColumn for editing record and other is GridButtonColumn for deleting record. I also placed radAjaxPanel and radAjaxLoading panel. All input controls and grid resides under raAjaxPanel.
When I click edit button from grid it populates all the input controls and grid gets disappear. Similarly when i click delete button from grid it makes an ajax call like edit button does and disappears the grid.

Can anyone please help me out.

Thanks,
Mohsin

[Shinu]

Hello Mohsin,

I guess you are binding the grid in PageLoad event, which is Simple data binding technique.Try binding the Grrd uding using "AdvancedData binding" using NeedDataSource event.

For more information about this can be available here.

-Shinu.

[Mohsin]

Hi Shinu,

This works for me. But I have other problems as well.....first how can i add dropdown list dynamically and populate from database when press edit button? and how can I hide those fields that shows key fields(customerID, CountryID...etc).

Thanks,
Mohsin

[Shinu]

Hello Moshin,
You can add the DropDown from the aspx itself.
One suggestion is to use GridDraopDownColumn which shown text in normal mode and DropDown in Edit mode.
aspx:

<telerik:GridDropDownColumn DataSourceID="SqlDataSource1" DataField="CustomerID"
HeaderText="CustomerID" ListTextField="Region" ListValueField="CustomerID" UniqueName="CustomerID">
</telerik:GridDropDownColumn>

For your second query, you can set the property ReadOnly for the key field columns, that prevents the value from editing.
aspx:

<telerik:GridBoundColumn  ReadOnly="true" DataField="orderID" HeaderText="orderID" SortExpression="orderID"
UniqueName="orderID">

Thanks,
Shinu.

[Mohsin]

Hi Shinu,

Thanks for the prompt help. It really works for me. 
I tried adding asp dropdown and populate from database it works and also i added griddropdowncolumn and bind that column from database but I uses the DataSourceID attribute that you mentioned in your reply. How can I achieve databinding without dataScoureID attribute????

Regards,
Mohsin

[Shinu]

Hello Mohsin,

One approach is to access the control from code behind and populate form there. Here is a sample code.
C#:

protected void RadGrid1_ItemDataBound(object sender, GridItemEventArgs e)
{
   if (e.Item is GridEditFormItem && e.Item.IsInEditMode)//Checks whether the grid is in edit mode.
        {
            GridEditFormItem editItem = (GridEditFormItem)e.Item;
            RadComboBox Combo1= (RadComboBox)editItem["CustomerID"].Controls[0];
            CustomerID.DataSource =//set the datasource here
        }
}

Thanks,
Shinu.