现在我有这个:

da = new SqlDataAdapter("SELECT * FROM LOGIN WHERE RECHTEN=2", conn);
dtt = new DataTable();
da.Fill(dtt);
for (int i = 0; i < dtt.Rows.Count; i++)
{
    txtKlantid.Items.Add(dtt.Rows[i]["klantId"]);
}


现在它仅显示klantId,但我也想显示名称。然后,当klantId和名称出现时,我只能说klantId

selectedUserId = combobox.Text;


编辑:

//这是我初始化COMBOBOX的地方

        da = new SqlDataAdapter("SELECT (kg.voornaam+' '+kg.achternaam + ' - ' + CONVERT(varchar,l.klantId)) AS dispValue FROM LOGIN l inner join klantGegevens kg on l.klantId=kg.klantid WHERE RECHTEN=2", conn);
        dtt = new DataTable();
        da.Fill(dtt);
        txtKlantid.DisplayMember = "dispValue";
        txtKlantid.ValueMember = "klantId";
        txtKlantid.DataSource = dtt;


//这是删除用户的按钮

  private void btnDeleteUser_Click(object sender, EventArgs e)
        {

            if (userInformation.addPersonsPermission)
            {
                int selectedUserId = Convert.ToInt32(((DataRowView)txtKlantid.SelectedValue)["klantId"]);
                if (users.deleteKlantAdmin(selectedUserId))
                {
                    MetroMessageBox.Show(this, "Gebruiker "+selectedUserId+" is verwijderd", "Verwijderd");
                }
                else
                {
                    MetroMessageBox.Show(this, "Er ging iets fout, contacteer de beheerder", "Fout");
                }

            }
            else
            {
                loginAddUser addUserLogin = new loginAddUser();
                addUserLogin.ShowDialog();
            }
        }

最佳答案

在这种情况下,DisplayMemberValueMember属性将成为您的朋友。

请避免仅从表格中选择所有字段以填充您的组合框。您可以做类似的事情,

da = new SqlDataAdapter("SELECT (name + ' - ' + CONVERT(varchar,klantId)) AS dispValue, klantId FROM LOGIN WHERE RECHTEN=2", conn);
dtt = new DataTable();
da.Fill(dtt);
txtKlantid.DisplayMember = "dispValue";
txtKlantid.ValueMember = "klantId";
txtKlantid.DataSource = dtt;


在此示例中,txtKlantid.SelectedValue将为您提供klantId值,而txtKlantid.Text将为您提供name - klantId值。

希望这可以帮助...

关于c# - 如何在组合框中显示2列? (多个值),我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/30592925/

10-11 12:24