(09-07-19, 07:33 PM)asemshahen5 كتب : عدله ليصبح كهذا :

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 (comboBox3.Items.Count>0)
            {
                comboBox3.Items.Clear();
            }
            if (QDt.Rows.Count > 0)
            {
                foreach (DataRow str in QDt.Rows)
                {
                    comboBox3.Items.Add(str[0].ToString());
                }
            } 
        } 


(09-07-19, 07:50 PM)asemshahen5 كتب : في بداية الصفحة الاكواد عدل الكود التالي ليصبح هكذا :

PHP كود :

       public FRM_CONTRACTOR_ACCOUNT_MANAGEMENT()
        {
            InitializeComponent();
            comboBox2.DataSource = frm2.dt;
            comboBox2.DisplayMember = "Project_Number";
            comboBox2.ValueMember = "S_N";
            comboBox2.SelectedIndex = 1;
            comboBox2.SelectedIndex = 0;
        }