Szerkesztés

Megosztás a következőn keresztül:

HtmlSelect.Items Property

  • Reference

Definition

Namespace:
System.Web.UI.HtmlControls
Assembly:
System.Web.dll

Gets a collection that contains the items listed in an HtmlSelect control.

public:
 property System::Web::UI::WebControls::ListItemCollection ^ Items { System::Web::UI::WebControls::ListItemCollection ^ get(); };
[System.ComponentModel.Browsable(false)]
public System.Web.UI.WebControls.ListItemCollection Items { get; }
[<System.ComponentModel.Browsable(false)>]
member this.Items : System.Web.UI.WebControls.ListItemCollection
Public ReadOnly Property Items As ListItemCollection

Property Value

ListItemCollection

A ListItemCollection that contains the items listed in an HtmlSelect control.

Attributes
BrowsableAttribute

Examples

The following code example demonstrates how to use the Items collection to iterate through the items in the HtmlSelect control and determine which items are selected.


<%@ Page Language="C#" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    void Button_Click (Object sender, EventArgs e)
    {
        
        Label1.Text = "You selected:";

        for (int i = 0; i <= Select1.Items.Count - 1; i++)
        {
           if (Select1.Items[i].Selected)
              Label1.Text += "<br />    -" + Select1.Items[i].Text;
        }

    }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

<head>
    <title> HtmlSelect Example </title>
</head>
<body>
<form id="form1" runat="server">
    
    <h3> HtmlSelect Example </h3>

    Select items from the list: <br /><br />

    <select id="Select1" 
            multiple="true"
            runat="server">

        <option value="1" selected="selected"> Item 1 </option>
        <option value="2"> Item 2 </option>
        <option value="3"> Item 3 </option>
        <option value="4"> Item 4 </option>
        <option value="5"> Item 5 </option>
        <option value="6"> Item 6 </option>

    </select>
    <br /><br />

    <button id="Button1"
            onserverclick="Button_Click"
            runat="server">

        Submit

    </button>
    <br /><br />

    <asp:Label id="Label1"
         runat="server"/>

   </form>
</body>
</html>


<%@ Page Language="VB" AutoEventWireup="True" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

    Sub Button_Click (sender As Object, e As EventArgs)
        
        Dim i As Integer

        Label1.Text = "You selected:"
        For i = 0 to Select1.Items.Count - 1
  
            If Select1.Items(i).Selected Then
               Label1.Text = Label1.Text & "<br />    -" _
                   & Select1.Items(i).Text
            End If         

        Next i

    End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >

<head>
    <title> HtmlSelect Example </title>
</head>
<body>
<form id="form1" runat="server">

    <h3> HtmlSelect Example </h3>

    Select items from the list: <br /><br />

    <select id="Select1" 
            multiple="true"
            runat="server">

        <option value="1" selected="selected"> Item 1 </option>
        <option value="2"> Item 2 </option>
        <option value="3"> Item 3 </option>
        <option value="4"> Item 4 </option>
        <option value="5"> Item 5 </option>
        <option value="6"> Item 6 </option>

    </select>
    <br /><br />

    <button id="Button1"
            onserverclick="Button_Click"
            runat="server">

        Submit

    </button>
    <br /><br />

    <asp:Label id="Label1"
         runat="server"/>

   </form>
</body>
</html>

Remarks

Use the Items collection to manage the items listed in the HtmlSelect control. You can programmatically add items to, remove items from, and insert items into the collection.

The Items collection is commonly used to iterate through the items in the HtmlSelect control. For example, when multiple items are selected, you can iterate through the Items collection to determine which items are selected.

Applies to

See also