Hello Alexander,
I completely agree with you that the null text should be shown whenever there is no item selected in a
DropDownList, but until they will fix this, i would suggest you try this workaround:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Telerik.WinControls.UI;
namespace TestDropDownListNullText
{
public partial class Form1 : Form
{
public RadDropDownList radDropDownList1;
public Form1()
{
InitializeComponent();
this.Load += new EventHandler(Form1_Load);
}
void Form1_Load(object sender, EventArgs e)
{
radDropDownList1 = new RadDropDownList();
radDropDownList1.Dock = DockStyle.Top;
this.Controls.Add(radDropDownList1);
radDropDownList1.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList;
radDropDownList1.PopupClosing += new RadPopupClosingEventHandler(radDropDownList1_PopupClosing);
radDropDownList1.DataSource = new TestsCollection(10);
radDropDownList1.DisplayMember = "Name";
radDropDownList1.Text = "Please select something...";
}
void radDropDownList1_PopupClosing(object sender, RadPopupClosingEventArgs args)
{
if (string.IsNullOrEmpty(radDropDownList1.Text))
{
radDropDownList1.Text = "Please select something...";
}
}
}
#region Business Objects
public class Test
{
public int Id
{
get;
set;
}
public string Name
{
get;
set;
}
public Test(int id, string name)
{
this.Id = id;
this.Name = name;
}
}
public class TestsCollection : List<Test>
{
public TestsCollection(int noItems)
{
for (int i = 0; i < noItems; i++)
{
this.Add(new Test(i, "test" + i));
}
}
}
#endregion Business Objects
}
Hope this helps, if you have any other questions or comments, please let me know,
Best Regards,
Emanuel Varga