WebPartManager.Zones Property

Reference

Definition

Namespace:: System.Web.UI.WebControls.WebParts

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets a reference to a collection of all the WebPartZoneBase zones on a Web page.

public:
 property System::Web::UI::WebControls::WebParts::WebPartZoneCollection ^ Zones { System::Web::UI::WebControls::WebParts::WebPartZoneCollection ^ get(); };

[System.ComponentModel.Browsable(false)]
public System.Web.UI.WebControls.WebParts.WebPartZoneCollection Zones { get; }

[<System.ComponentModel.Browsable(false)>]
member this.Zones : System.Web.UI.WebControls.WebParts.WebPartZoneCollection

Public ReadOnly Property Zones As WebPartZoneCollection

Property Value

WebPartZoneCollection

A WebPartZoneCollection that references a set of WebPartZoneBase zones.

Attributes: BrowsableAttribute

Examples

The following code example demonstrates how to use the Zones property programmatically to access individual WebPartZoneBase zone controls. Notice that in the declarative markup for the Web page, there are two <asp:webpartzone> elements, each containing a server control. In the <script> section of the page, the code uses the Zones property to access the individual zones, listing all the zone IDs and then changing the background color on the second zone.

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

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

  protected void Button1_Click(object sender, EventArgs e)
  {
    foreach (WebPartZone zone in WebPartManager1.Zones)
    {
      Label1.Text += zone.ID + "<br />";
    }
  }

  protected void Button2_Click(object sender, EventArgs e)
  {
    WebPartManager1.Zones["WebPartZone2"].BackColor = System.Drawing.Color.LightBlue;
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
      <!-- Reference the WebPartManager control. -->
    <asp:WebPartManager ID="WebPartManager1" runat="server" />
    <div>
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            DisplayMode="HyperLink" 
            ID="BulletedList1" 
            runat="server"
            Title="My Links"
            ExportMode="All">
            <asp:ListItem Value="http://www.microsoft.com">
            Microsoft
            </asp:ListItem>
            <asp:ListItem Value="http://www.msn.com">
            MSN
            </asp:ListItem>
            <asp:ListItem Value="http://www.contoso.com">
            Contoso Corp.
            </asp:ListItem>
          </asp:BulletedList>
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:WebPartZone ID="WebPartZone2" runat="server">
        <ZoneTemplate>
          <asp:Calendar ID="Calendar1" runat="server" 
            Title="My Calendar" />        
        </ZoneTemplate>
      </asp:WebPartZone>
      <hr />
      <asp:Button ID="Button1" runat="server" 
        Text="List Zone IDs" 
        OnClick="Button1_Click" />
      <asp:Button ID="Button2" runat="server" 
        Text="Change Zone BackColor" 
        OnClick="Button2_Click" />  
      <br />
      <asp:Label ID="Label1" runat="server" text="" />
    </div>
    </form>
</body>
</html>

<%@ Page Language="vb" %>

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

  Protected Sub Button1_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    Dim zone As WebPartZone
    For Each zone In WebPartManager1.Zones
      Label1.Text += zone.ID & "<br />"
    Next
  End Sub

  Protected Sub Button2_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    WebPartManager1.Zones("WebPartZone2").BackColor = _
      System.Drawing.Color.LightBlue
  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
      <!-- Reference the WebPartManager control. -->
    <asp:WebPartManager ID="WebPartManager1" runat="server" />
    <div>
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            DisplayMode="HyperLink" 
            ID="BulletedList1" 
            runat="server"
            Title="My Links"
            ExportMode="All">
            <asp:ListItem Value="http://www.microsoft.com">
            Microsoft
            </asp:ListItem>
            <asp:ListItem Value="http://www.msn.com">
            MSN
            </asp:ListItem>
            <asp:ListItem Value="http://www.contoso.com">
            Contoso Corp.
            </asp:ListItem>
          </asp:BulletedList>
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:WebPartZone ID="WebPartZone2" runat="server">
        <ZoneTemplate>
          <asp:Calendar ID="Calendar1" runat="server" 
            Title="My Calendar" />        
        </ZoneTemplate>
      </asp:WebPartZone>
      <hr />
      <asp:Button ID="Button1" runat="server" 
        Text="List Zone IDs" 
        OnClick="Button1_Click" />
      <asp:Button ID="Button2" runat="server" 
        Text="Change Zone BackColor" 
        OnClick="Button2_Click" />  
      <br />
      <asp:Label ID="Label1" runat="server" text="" />
    </div>
    </form>
</body>
</html>

Note that for the code example to work, you must add a setting in the Web.config file to enable exporting Web Parts description files. Ensure that you have a Web.config file in the same directory as the Web page for this code example. Within the <system.web> section, make sure there is a <webParts> element with an enableExport attribute set to true, as in the following markup.

<webParts enableExport="true">

...

</webParts>

After you load the page into a browser, if you click the List Zone IDs button, the code uses the Zones property to list the IDs of all zones in the collection. If you click the Change Zone BackColor button, the code changes the background color of the second zone.

Remarks

The Zones property is used by the WebPartManager control to track the WebPartZoneBase zones on a Web page. Note that the property does not reference all types of zones; it references only zones that derive from the WebPartZoneBase class, including WebPartZone zones.

Although the collection referenced by the property is read-only, you can use it to access the individual objects in the collection and work with them programmatically.

Applies to

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