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I have the code below
 
It throws an error Object reference not set to an instance of object
 
TextBox rateCenterName = (TextBox)row.FindControl("txtRateCenterName");
 
cmd.Parameters.Add("@RateCenterName", OleDbType.VarChar).Value = rateCenterName.Text;
 

kindly help me out
 
Thanks,
Arjun
Posted 24-Feb-12 3:32am
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Solution 1

From Control.FindControl documentation[^]:

Return Value
The specified control, or a null reference (Nothing in Visual Basic) if the specified control does not exist.



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Solution 2

Check the textbox variable for null before using it:
 
TextBox rateCenterName = (TextBox)row.FindControl("txtRateCenterName");
cmd.Text.Parameters.Add("@RateCenterName", OleDbType.VarChar).Value = (rateCenterName != null) ? rateCenterName.Text : "";
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Solution 3

textbox's name in it's properties and in the code was different
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Solution 4

TextBox = (TextBox)row.FindControl("txtRateCenterName");
 if(rateCenterName !=null)
{
cmd.Parameters.Add("@RateCenterName", OleDbType.VarChar).Value =rateCenterName.Text;
}
 
check "txtRateCenterName" control is exist or not in "row"
 
if you are using GridView then search the TextBox control in
row.Cells[yourcellIndex]
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