Asp net listbox multiple selection

User-68639941 posted
you can use ListBox with SelectionMode="Multiple Apples Grapes Oranges Pear to read the values int[] indexes = this.lbxfruit.GetSelectedIndices[]; for [int index = 0; index < indexes.Length; index++] items += this.lbxfruit.Items[indexes[index]].Text + ",";

public: virtual property System::Web::UI::WebControls::ListSelectionMode SelectionMode { System::Web::UI::WebControls::ListSelectionMode get[]; void set[System::Web::UI::WebControls::ListSelectionMode value]; }; public virtual System.Web.UI.WebControls.ListSelectionMode SelectionMode { get; set; } member this.SelectionMode : System.Web.UI.WebControls.ListSelectionMode with get, set Public Overridable Property SelectionMode As ListSelectionMode ListSelectionMode

One of the ListSelectionMode values. The default value is Single.

Examples

The following example illustrates how to use the SelectionMode property to allow the user to select multiple selections from the ListBox control.

ListBox Example void SubmitBtn_Click[Object sender, EventArgs e] { Message.Text = "You chose:
"; // Iterate through the Items collection of the ListBox and // display the selected items. foreach [ListItem item in ListBox1.Items] { if[item.Selected] { Message.Text += item.Text + "
"; } } }

ListBox Example

Select items from the list and click Submit.
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6



ListBox Example Sub SubmitBtn_Click[sender As Object, e As EventArgs] Message.Text = "You chose:
" ' Iterate through the Items collection of the ListBox and ' display the selected items. Dim item As ListItem For Each item in ListBox1.Items If item.Selected Then Message.Text &= item.Text & "
" End If Next End Sub

ListBox Example

Select items from the list and click Submit.
Item 1 Item 2 Item 3 Item 4 Item 5 Item 6

Remarks

Use the SelectionMode property to specify the mode behavior of the ListBox control. Setting this property to ListSelectionMode.Single indicates only a single item can be selected from the ListBox control, while ListSelectionMode.Multiple specifies multiple items can be selected.

The value of the SelectionMode property is stored in view state.

Applies to

• ListSelectionMode
• ListBox Web Server Control Overview

asp.net listbox get multiple selected items

The following asp.net c# example code demonstrate us how can we get ListBox control's selected items programmatically when ListBox selection mode is multiple. ListBox control 'SelectionMode' property have two possible values 'Multiple' and 'Single'. Multiple mode allow us to select more than one items from ListBox control. When users select items from ListBox which SelectionMode is Multiple, then it is more complicated to get the selected items programmatically at run time.

We can get ListBox selected items on ListBox SelectedIndexChanged event or manually by a Button click without AutoPostBack. To get the ListBox selected items, at first we perform a Linq query to get the ListBox items which ListItem object's 'Selected' property value is 'true'. Then we loop through the selected items collection and display on web browser with items text and value..

listbox-get-multiple-selected-items.aspx

protected void Page_Load[object sender, EventArgs e] { if[!Page.IsPostBack] { //auto height of listbox to remove vertical scrollbar ListBox1.Rows = ListBox1.Items.Count; } } protected void ListBox1_SelectedIndexChanged[object sender, EventArgs e] { //linq query to get all selected items from listbox var items = from ListItem li in ListBox1.Items where li.Selected == true select li; Label1.Text = "you selected....
"; //loop through selected items in listbox foreach[ListItem li in items] { //selected item text and value. Label1.Text +=li.Text + " | "+li.Value + "
"; } } asp.net listbox get multiple selected items

I can't find a way to select multiple items in an ASP.NET ListBox in the code behind? Is this something needs to be done in Javascript?