Answer Posted / karthikeyant

some changes made in the above code

cmd.Connection = CON; //_cmd is sqlCommand and
CON is Connection
_cmd.CommandText = "select
Book_Code,ISBN,Title_Of_book from Book_Master";

SqlDataReader dr = _cmd.ExecuteReader();
DataTable dataTable = new DataTable();
dataTable.Load(dr);
dr.Close();
_cmd.Dispose();

dataGridView2.DataSource = dataTable;

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