am gettin specific cast not alowed error an anybody help

[prasanth1802]

string Empid = e.Item.Cells[1].Text;
string Empname = ((TextBox)e.Item.Cells[2].Controls[0]).Text;
string date = ((TextBox)e.Item.Cells[3].Controls[0]).Text;
string Special=((TextBox)e.Item.Cells[4].Controls[0]).Text;
string Sex=((TextBox)e.Item.Cells[5].Controls[0]).Text;



am getting Specified cast is not valid.
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.InvalidCastException: Specified cast is not valid.

Source Error:


Line 236: string date = ((TextBox)e.Item.Cells[3].Controls[0]).Text;
Line 237: string Special=((TextBox)e.Item.Cells[4].Controls[0]).Text;
Line 238: string Sex=((TextBox)e.Item.Cells[5].Controls[0]).Text;
Line 239:
Line 240: //DateTime dt= String.Format("{0:d}", date);