[asemshahen5]

تفضل :

PHP كود :

private void textBox1_TextChanged(object sender, EventArgs e)
        {
            DataTable QDt = new DataTable();
            QDt.Clear();
            cmd = new SqlCommand("select NAME_OF_CONTRACTOR from CONTRACTORS where Project_Number ='" + comboBox2.Text.ToString() + "'", sqlcon);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(QDt);
            if (QDt.Rows.Count > 0)
            {
                comboBox3.Items.Clear();
                foreach (DataRow str in QDt.Rows)
                {
                    comboBox3.Items.Add(str[0].ToString());
                }
            } 
        } 


   
أي شيء آخر فقط أخبرني .