con = new OleDbConnection("provider=oraoledb.oracle.1;user id=scott;password=tiger"); daEmp = new OleDbDataAdapter("select * from emp", con); daDept = new OleDbDataAdapter("select * from dept", con); //---------------------------- ds = new DataSet(); //--------------------------------------- daEmp.Fill(ds, "emp"); dataGridView1.DataSource = ds.Tables["emp"]; //------------------------------------------- daDept.Fill(ds, "dept"); cmbDname.DataSource = ds.Tables["dept"]; cmbDname.DisplayMember = "dname"; cmbDname.ValueMember = "deptno"; //------------------------------------------------- pictureBox1.DataBindings.Add("Image", ds.Tables["emp"], "photo2", true, DataSourceUpdateMode.OnPropertyChanged); txtEmpno.DataBindings.Add("text", ds.Tables["emp"], "empno"); txtEname.DataBindings.Add("text", ds.Tables["emp"], "ename"); txtSal.DataBindings.Add("text", ds.Tables["emp"], "sal"); cmbDname.DataBindings.Add("selectedvalue", ds.Tables["emp"], "deptno"); dtpHireDate.DataBindings.Add("text", ds.Tables["emp"], "hiredate"); txtJob.DataBindings.Add("text", ds.Tables["emp"], "job"); OleDbCommandBuilder cmb = new OleDbCommandBuilder(daEmp); bmb = this.BindingContext[ds.Tables["emp"]]; } Im using the above code to insert picture of employee but when i Try to save it using bmb.EndCurrentEdit(); daEmp.Update(ds.Tables["emp"]); Im getting an error Dynamic SQL generation for the UpdateCommand is not supported against a SelectCommand that does not return any key column information. I have tried to change the data type in Oracle from blob to long raw but Im getting the same issue. Could u plz let me know what is the error Table emp already having primary key The problem occur only when the line binding of picturebox is ther. If i committed the line of picturebox no error the record will be saved. In Sql server I have tried same table and same column it is working. In sql server I declare the column of employee photo as image data type. But in oracle I have tried Long raw and blob data type it is not working