WebPartManager.EditDisplayMode Field

Reference

Definition

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

Assembly:: System.Web.dll

Important

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Represents the display mode in which end users can edit and modify server controls. This field is read-only.

public: static initonly System::Web::UI::WebControls::WebParts::WebPartDisplayMode ^ EditDisplayMode;

public static readonly System.Web.UI.WebControls.WebParts.WebPartDisplayMode EditDisplayMode;

 staticval mutable EditDisplayMode : System.Web.UI.WebControls.WebParts.WebPartDisplayMode

Public Shared ReadOnly EditDisplayMode As WebPartDisplayMode

Field Value

WebPartDisplayMode

Examples

The following code example demonstrates how to work with the EditDisplayMode field programmatically. The code populates a drop-down list with the supported display modes for the page, which in this case are browse, design, and edit. To support editing, an <asp:EditorZone> element is in the page. Notice that, in the Page_PreRender method, the code checks whether the current DisplayMode property is set to EditDisplayMode. If so, Label1 will be visible, and if not, Label1 will be hidden.

<%@ 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 Page_Init(object sender, EventArgs e)
  {
    foreach (WebPartDisplayMode mode in mgr.SupportedDisplayModes)
    {
      string modeName = mode.Name;
      if (mode.IsEnabled(mgr))
      {
        ListItem item = new ListItem(modeName, modeName);
        DisplayModeDropdown.Items.Add(item);
      }      
    }
  }

  protected void DisplayModeDropdown_SelectedIndexChanged(object 
    sender, EventArgs e)
  {
    String selectedMode = DisplayModeDropdown.SelectedValue;
    WebPartDisplayMode mode = 
      mgr.SupportedDisplayModes[selectedMode];
    if (mode != null)
      mgr.DisplayMode = mode;
  }

  protected void Page_PreRender(object sender, EventArgs e)
  {
    if (mgr.DisplayMode == WebPartManager.EditDisplayMode)
      Label1.Visible = true;
    else
      Label1.Visible = false;
  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr" runat="server">
      </asp:WebPartManager>
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:Calendar ID="Calendar1" runat="server" 
            Title="My Calendar" />
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:WebPartZone ID="WebPartZone2" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            DisplayMode="HyperLink" 
            ID="BulletedList1" 
            runat="server"
            Title="My Links">
            <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:EditorZone ID="EditorZone1" runat="server">
        <ZoneTemplate>
          <asp:AppearanceEditorPart runat="server" 
            ID="Appearance1">
          </asp:AppearanceEditorPart>
          <asp:LayoutEditorPart runat="server" ID="Layout1">
          </asp:LayoutEditorPart>
        </ZoneTemplate>
      </asp:EditorZone>
      <hr />
      <asp:Label ID="Label1" runat="server" 
        Text="Currently in Edit Mode" 
        Font-Bold="true"
        Font-Size="125%" />
      <br />
      <asp:DropDownList ID="DisplayModeDropdown" runat="server" 
        AutoPostBack="true"
        Width="120"
        OnSelectedIndexChanged=
        "DisplayModeDropdown_SelectedIndexChanged">
      </asp:DropDownList>
    </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 Page_Init(ByVal sender As Object, _
    ByVal e As EventArgs)
    Dim mode As WebPartDisplayMode
    For Each mode In mgr.SupportedDisplayModes
      Dim modeName As String = mode.Name
      If mode.IsEnabled(mgr) Then
        Dim item As ListItem = New ListItem(modeName, modeName)
        DisplayModeDropdown.Items.Add(item)
      End If
    Next
    
  End Sub

  Protected Sub DisplayModeDropdown_SelectedIndexChanged(ByVal _
    sender As Object, ByVal e As EventArgs)
    Dim selectedMode As String = _
      DisplayModeDropdown.SelectedValue
    Dim mode As WebPartDisplayMode = _
      mgr.SupportedDisplayModes(selectedMode)
    If mode IsNot Nothing Then
      mgr.DisplayMode = mode
    End If
  End Sub
  
  Protected Sub Page_PreRender(ByVal sender As Object, _
    ByVal e As System.EventArgs)
    If mgr.DisplayMode.Equals(WebPartManager.EditDisplayMode) Then
      Label1.Visible = True
    Else
      Label1.Visible = False
    End If
  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="mgr" runat="server">
      </asp:WebPartManager>
      <asp:WebPartZone ID="WebPartZone1" runat="server">
        <ZoneTemplate>
          <asp:Calendar ID="Calendar1" runat="server" 
            Title="My Calendar" />
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:WebPartZone ID="WebPartZone2" runat="server">
        <ZoneTemplate>
          <asp:BulletedList 
            DisplayMode="HyperLink" 
            ID="BulletedList1" 
            runat="server"
            Title="My Links">
            <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:EditorZone ID="EditorZone1" runat="server">
        <ZoneTemplate>
          <asp:AppearanceEditorPart runat="server" 
            ID="Appearance1">
          </asp:AppearanceEditorPart>
          <asp:LayoutEditorPart runat="server" ID="Layout1">
          </asp:LayoutEditorPart>
        </ZoneTemplate>
      </asp:EditorZone>
      <hr />
      <asp:Label ID="Label1" runat="server" 
        Text="Currently in Edit Mode" 
        Font-Bold="true"
        Font-Size="125%" />
      <br />
      <asp:DropDownList ID="DisplayModeDropdown" runat="server" 
        AutoPostBack="true"
        Width="120"
        OnSelectedIndexChanged=
        "DisplayModeDropdown_SelectedIndexChanged">
      </asp:DropDownList>
    </div>
    </form>
</body>
</html>

After you load the page in a browser, you are in browse mode by default. Notice the label on the page is hidden. Use the drop-down list control to switch the page to edit mode. Notice that, because of the code in the Page_PreRender method, the label is now visible. Click the Edit verb in the verbs menu on one of the controls, to enable editing of that specific control.

Remarks

The EditDisplayMode field references a custom WebPartDisplayMode object that is created and contained by the WebPartManager control. Because this is a static object, you can refer to it directly through the WebPartManager class without needing an instance of the control.

When a page that contains Web Parts controls first loads, it is in BrowseDisplayMode (browse mode) by default. When users want to edit or modify a server control, they must first switch the page to EditDisplayMode (edit mode). Second, they must select a specific server control to edit, by clicking the edit verb on the verbs menu in that control's header. After the control is in edit mode, the editing user interface (UI) appears for editing the selected control.

To enable edit mode on a page, the page must contain at least one EditorZone zone that includes one or more of the provided editing controls, such as the LayoutEditorPart control, or custom editing controls.

Applies to

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