Object reference not set to an instance of an object - ASP.NET

[itsvineeth209]

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.NullRefe renceException: Object reference not set to an instance of an object.

Source Error:


Line 236: GridViewRow row = GridView1.Rows[i];
Line 237:
Line 238: bool isChecked = ((CheckBox)row. FindControl("Ch eckBox2")).Chec ked;
Line 239:
Line 240: if (isChecked)


Source File: h:\Office Works\Projects\ Sample Applications\Gr idViewVitCode.a spx.cs Line: 238


Plz solve this problem

[nateraaaa]

This error occurs when a control or variable you are trying to access is NULL. In this case either row is NULL or the CheckBox does not exist. Run a debugger and see which value is NULL.

Nathan

[Surajs]

The value in ((CheckBox)row. FindControl("Ch eckBox2")).Chec ked; might not be initialized. Please check if there is any value being taken in it. you can use break points to do it.