At first I have to find a row and then I have to change it. So I use Rows.Find() method for finding specific row and then I set its 6. col with this code
this.dSet.Tables[0].Rows.Find( txt1.text.Trim() )[5] = this.txt5.Text.Trim();
but it gave this error.
An unhandled exception of type 'System.Data.MissingPrimaryKeyException' occurred in system.data.dll
Additional information: Table doesn't have a primary key.
But Tables[0] have primary key. Why it gave this error? pls help