我有一个下拉框(comboBox)的错误
我的代码:
SqlConnection conn = new SqlConnection();
try
{
conn = new SqlConnection(@"Data Source=SHARKAWY;Initial Catalog=Booking;Persist Security Info=True;User ID=sa;Password=123456");
string query = "select FleetName, FleetID from fleets";
SqlCommand cmd = new SqlCommand(query, conn);
cmd.CommandText = query;
conn.Open();
SqlDataReader drd = cmd.ExecuteReader();
while (drd.Read())
{
cmbTripName.Items.Add(drd["FleetName"].ToString());
cmbTripName.ValueMember = drd["FleetID"].ToString();
cmbTripName.DisplayMember = drd["FleetName"].ToString();
}
}
catch
{
MessageBox.Show("Error ");
}
数据呈现在组合框中,但是当你改变选中的值成员(valumember)时,显示成员(displaymember)并没有一起改变。
现在它可以工作,但是当我点击按钮来展示数据时。
private void button1_Click(object sender, EventArgs e)
{
label1.Text = cmbTripName.DisplayMember;
label2.Text = cmbTripName.ValueMember;
}
这将会显示:
FleetName
FleetID
它不会显示实际的数值。
label1.Text = cmbTripName.DisplayMember; label2.Text = cmbTripName.ValueMember;
- Ahmed Sharkawy