Can anyone explain me this code

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Label l1 = (Label)GridView1.Rows[0].FindControl("Label1");
            RadioButtonList rbl = (RadioButtonList)GridView1.Rows[0].FindControl("RadioButtonList1");
            
            ((Dictionary<Int32, string>)Session["res"])[Int32.Parse(l1.Text.TrimEnd('.'))] = rbl.SelectedValue;

What I have tried:

how to create an instance for the code

Posted 5-Apr-18 5:28am

Member 13764464

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Comments

MiteshUmta 5-Apr-18 11:37am

above code is for accessing the control from gridview row. there is no need to create instance.

Member 13764464 5-Apr-18 11:39am

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 94: RadioButtonList rbl = (RadioButtonList)GridView1.Rows[0].FindControl("RadioButtonList1");
Line 95:
Line 96: ((Dictionary<Int32, string>)Session["res"])[Int32.Parse(l1.Text.TrimEnd('.'))] = rbl.SelectedValue;
Line 97:
Line 98: try

F-ES Sitecore 5-Apr-18 11:49am

Something you reference is "null", so that might be Session["res"], l1 or rbl. We can't run your code so we can't know, you'll need to debug to find out. Once you've found out you then need to work out why it is null and what to do when it's null...again something we can't know as we don't know your business rules.

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