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ZZZ
int dummy=Convert.ToInt32(das.Tables[0].Rows[0].ItemArray[0].ToString());
MessageBox.Show(dummy.ToString());
this.combo_opNaam.SelectedValue=dummy;
MessageBox.Show(this.combo_opNaam.SelectedValue.ToString());
first messagebox : 16,
second: "object reference is not set to an instance of an oject"
MessageBox.Show(dummy.ToString());
this.combo_opNaam.SelectedValue=dummy;
MessageBox.Show(this.combo_opNaam.SelectedValue.ToString());
first messagebox : 16,
second: "object reference is not set to an instance of an oject"