how to check asp:objectdatasource is empty or not

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I am using asp.Net object data source and need to check if it is empty i want to put some logic. ~~please help~~

 protected override void Page_Load(object sender, EventArgs e)
{
    if (myobjectdatasource == null)
            {
                //do something here
            }
            else
            {
                //do something here
            }
}

Posted 11-Dec-11 23:10pm

Gufran_khan

Updated 11-Dec-11 23:18pm

Rajesh Anuhya

v2

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Rajesh Anuhya 12-Dec-11 5:18am

What is the Error you are getting?

1 solution

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member60 · Answer 1 · 2011-12-11T23:19:00

Solution 1

In the ObjectDataSource's Selected method, cast e.ReturnValue to whatever container/collection object you expect to return and test if it is empty or null.

eg:

C#

if (((ArrayList)e.ReturnValue).Count == 0 || (ArrayList)e.ReturnValue == null)
{

       lblNoOrders.Text = "There are 0 results returned.";
}

Posted 11-Dec-11 23:19pm

member60

Comments

Gufran_khan 12-Dec-11 5:50am

Thanks for your kind reply.
but i cannot cast. as you can check in code i need to check in pageload event. and i cannot change BLL where selected method is defined.

jiji2663 8-Jul-13 2:35am

Great...
In ObjectDataSource's Selected method
if(e.ReturnValue==null)
lblNoOrders.Text = "There are 0 results returned.";