Answer Posted / ramachandraprabu

SqlConnection conn = new SqlConnection(strCon);
SqlCommand CmdSql = new SqlCommand("INSERT INTO Customers
(Firstname,Lastname,Address)Values('" + textbox1.Text
+ "', '"+textbox2.Test+"', '"+textbox3.Text+"')", conn);
CmdSql.ExecuteNonQuery();


\\If u use Html control we must use
textbox1.value
\\If u use asp.net controls we have to use
textbox1.text

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