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Server-side Programming Overview

You can configure the settings of RadMultiSelect and create its elements in the code-behind via the Server-Side API of the control.

RadMultiSelect Server-side Events

Below you can see a list of the server-side events available in the RadMultiSelect:

RadMultiSelect Public Properties and Methods

For a list with the server-side properties and methods of the control, see the Server-Side API of the RadMultiSelect class. You can also find it in the intellisense in Visual Studio.

Get Selected Items Text and Value

RadMultiSelect exposes the Text and Value server-side properties that contain the information from the DataTextField and DataValueField fields respectively.

Example 1: Get selected items value and text from RadMultiSelect

<telerik:RadMultiSelect ID="RadMultiSelect1" runat="server" Filter="Contains" Width="400px" Placeholder="Select items...">

<asp:Button ID="Button1" runat="server" Text="Get Data" OnClick="Button1_Click" />
protected void Page_Load(object sender, EventArgs e)
    if (!IsPostBack)
        RadMultiSelect1.DataTextField = "textField";
        RadMultiSelect1.DataValueField = "valueField";
        RadMultiSelect1.DataSource = GetData();

private object GetData()
    DataTable dt = new DataTable();

    for (int i = 0; i < 10; i++)
        dt.Rows.Add("Item " + i, i);

    return dt;

protected void Button1_Click(object sender, EventArgs e)
    var selectedValues = RadMultiSelect1.Value;

    foreach (string value in selectedValues)
        MultiSelectItem selectedItem = RadMultiSelect1.Items.FindChildByValue(value);
        string result = string.Format("Selected item with text: <strong>{0}</strong> and value: <strong>{1}</strong><br />", selectedItem.Text, selectedItem.Value);
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Not IsPostBack Then
        RadMultiSelect1.DataTextField = "textField"
        RadMultiSelect1.DataValueField = "valueField"
        RadMultiSelect1.DataSource = GetData()
    End If
End Sub

Private Function GetData() As Object
    Dim dt As DataTable = New DataTable()

    For i As Integer = 0 To 10 - 1
        dt.Rows.Add("Item " & i, i)

    Return dt
End Function

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim selectedValues = RadMultiSelect1.Value

    For Each value As String In selectedValues
        Dim selectedItem As MultiSelectItem = RadMultiSelect1.Items.FindChildByValue(value)
        Dim result As String = String.Format("Selected item with text: <strong>{0}</strong> and value: <strong>{1}</strong><br />", selectedItem.Text, selectedItem.Value)
End Sub
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