SqlException (0x80131904): Incorrect syntax near '('.
string s11 = "update SessionItem(ItemName,Quantity,Price,Date,Month) set ItemName='" + TextBox7.Text + "',Quantity='" + nb + "',Price='" + TextBox9.Text + "',Date='" + dt1 + "',Month='" + month1 + "' where ItemName='" + TextBox7.Text + "' ";
SqlCommand cmdh = new SqlCommand(s11, DbConnection.mCon);
cmdh.ExecuteNonQuery();