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ToolZone.InstructionText Property

  • Reference

Definition

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

Gets or sets the text in a ToolZone control that provides directions for end users.

public virtual string InstructionText { get; set; }

Property Value

String

A string that contains the directions for end users. A default value appropriate to specific tool zones is provided by derived ToolZone classes.

Examples

The following code example shows how to use the InstructionText property with an inherited ToolZone control. The example shows how to change the value of the instruction text that appears in an EditorZone control by using this property.

The first part of the code example is a user control that is referenced in the page, and enables you to switch the page to different display modes. For more information on display modes and enabling users to switch among them, see Walkthrough: Changing Display Modes on a Web Parts Page.

<%@ control language="C#" classname="DisplayModeMenuCS"%>
<script runat="server">
  
 // Use a field to reference the current WebPartManager.
  WebPartManager _manager;

  void Page_Init(object sender, EventArgs e)
  {
    Page.InitComplete += new EventHandler(InitComplete);
  }  

  void InitComplete(object sender, System.EventArgs e)
  {
    _manager = WebPartManager.GetCurrentWebPartManager(Page);

    String browseModeName = WebPartManager.BrowseDisplayMode.Name;

    // Fill the dropdown with the names of supported display modes.
    foreach (WebPartDisplayMode mode in _manager.SupportedDisplayModes)
    {
      String modeName = mode.Name;
      // Make sure a mode is enabled before adding it.
      if (mode.IsEnabled(_manager))
      {
        ListItem item = new ListItem(modeName, modeName);
        DisplayModeDropdown.Items.Add(item);
      }
    }

    // If shared scope is allowed for this user, display the scope-switching
    // UI and select the appropriate radio button for the current user scope.
    if (_manager.Personalization.CanEnterSharedScope)
    {
      Panel2.Visible = true;
      if (_manager.Personalization.Scope == PersonalizationScope.User)
        RadioButton1.Checked = true;
      else
        RadioButton2.Checked = true;
    }
    
  }
 
  // Change the page to the selected display mode.
  void DisplayModeDropdown_SelectedIndexChanged(object sender, EventArgs e)
  {
    String selectedMode = DisplayModeDropdown.SelectedValue;

    WebPartDisplayMode mode = _manager.SupportedDisplayModes[selectedMode];
    if (mode != null)
      _manager.DisplayMode = mode;
  }

  // Set the selected item equal to the current display mode.
  void Page_PreRender(object sender, EventArgs e)
  {
    ListItemCollection items = DisplayModeDropdown.Items;
    int selectedIndex = 
      items.IndexOf(items.FindByText(_manager.DisplayMode.Name));
    DisplayModeDropdown.SelectedIndex = selectedIndex;
  }

  // Reset all of a user's personalization data for the page.
  protected void LinkButton1_Click(object sender, EventArgs e)
  {
    _manager.Personalization.ResetPersonalizationState();
  }

  // If not in User personalization scope, toggle into it.
  protected void RadioButton1_CheckedChanged(object sender, EventArgs e)
  {
    if (_manager.Personalization.Scope == PersonalizationScope.Shared)
      _manager.Personalization.ToggleScope();
  }

  // If not in Shared scope, and if user is allowed, toggle the scope.
  protected void RadioButton2_CheckedChanged(object sender, EventArgs e)
  {
    if (_manager.Personalization.CanEnterSharedScope && 
        _manager.Personalization.Scope == PersonalizationScope.User)
      _manager.Personalization.ToggleScope();
  }
</script>
<div>
  <asp:Panel ID="Panel1" runat="server" 
    Borderwidth="1" 
    Width="230" 
    BackColor="lightgray"
    Font-Names="Verdana, Arial, Sans Serif" >
    <asp:Label ID="Label1" runat="server" 
      Text=" Display Mode" 
      Font-Bold="true"
      Font-Size="8"
      Width="120" 
      AssociatedControlID="DisplayModeDropdown"/>
    <asp:DropDownList ID="DisplayModeDropdown" runat="server"  
      AutoPostBack="true" 
      Width="120"
      OnSelectedIndexChanged="DisplayModeDropdown_SelectedIndexChanged" />
    <asp:LinkButton ID="LinkButton1" runat="server"
      Text="Reset User State" 
      ToolTip="Reset the current user's personalization data for the page."
      Font-Size="8" 
      OnClick="LinkButton1_Click" />
    <asp:Panel ID="Panel2" runat="server" 
      GroupingText="Personalization Scope"
      Font-Bold="true"
      Font-Size="8" 
      Visible="false" >
      <asp:RadioButton ID="RadioButton1" runat="server" 
        Text="User" 
        AutoPostBack="true"
        GroupName="Scope" OnCheckedChanged="RadioButton1_CheckedChanged" />
      <asp:RadioButton ID="RadioButton2" runat="server" 
        Text="Shared" 
        AutoPostBack="true"
        GroupName="Scope" 
        OnCheckedChanged="RadioButton2_CheckedChanged" />
    </asp:Panel>
  </asp:Panel>
</div>

The second part of the code example shows a partial class that contains the code to update the property programmatically in the Button1_Click method.

Important

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

public partial class Toolzone_overview_cs : System.Web.UI.Page
{
  protected void Button1_Click(Object sender, EventArgs e)
  {
    if(string.IsNullOrEmpty(TextBox1.Text))
      EditorZone1.InstructionText = String.Empty;
    else
      EditorZone1.InstructionText = Server.HtmlEncode(TextBox1.Text);
      TextBox1.Text = String.Empty;
  }
}

The third part of the code example shows a Web page that contains two inherited ToolZone controls: a CatalogZone control and an EditorZone control. Each ToolZone control sets some properties in the declarative markup of the page.

Important

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

<%@ Page Language="C#" 
  Codefile="Toolzone_overview.cs"
  Inherits="Toolzone_overview_cs"  %>
<%@ register TagPrefix="uc1" 
  TagName="DisplayModeMenuCS" 
  Src="DisplayModeMenuCS.ascx" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Tool Zone Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
      <asp:WebPartManager ID="WebPartManager1" Runat="server" />
      <uc1:DisplayModeMenuCS ID="DisplayModeMenu1" runat="server" />
      <asp:WebPartZone ID="WebPartZone1" Runat="server" >
        <ZoneTemplate>
          <asp:BulletedList 
            ID="BulletedList1" 
            Runat="server"
            DisplayMode="HyperLink" 
            Title="Favorite Links" >
            <asp:ListItem Value="http://msdn.microsoft.com">MSDN</asp:ListItem>
            <asp:ListItem Value="http://www.asp.net">ASP.NET</asp:ListItem>
            <asp:ListItem Value="http://www.msn.com">MSN</asp:ListItem>
          </asp:BulletedList>
        </ZoneTemplate>
      </asp:WebPartZone>
      <asp:EditorZone 
        ID="EditorZone1" 
        Runat="server">
        <HeaderVerbStyle Font-Underline="true" />
        <ZoneTemplate>
          <asp:AppearanceEditorPart ID="AppearanceEditorPart1" Runat="server" />
          <asp:LayoutEditorPart ID="LayoutEditorPart1" Runat="server" /> 
        </ZoneTemplate>
      </asp:EditorZone>
      <asp:CatalogZone ID="CatalogZone1" Runat="server">
        <LabelStyle Font-Italic="true" />
        <ZoneTemplate>
          <asp:DeclarativeCatalogPart ID="DeclarativeCatalogPart1" Runat="server">
            <WebPartsTemplate>
              <asp:Calendar ID="Calendar1" Runat="server" Title="My Calendar" />
            </WebPartsTemplate>
          </asp:DeclarativeCatalogPart>
        </ZoneTemplate>
      </asp:CatalogZone>
      <asp:Button ID="Button1" Runat="server" Text="Update Edit Zone Text" OnClick="Button1_Click" />
      <asp:TextBox ID="TextBox1" Runat="server"></asp:TextBox>
    </div>
    </form>
</body>
</html>

You can load the page in a browser and switch among the various page display modes to see how the different tool zones behave. Switch the page into edit mode, enter some text into the text box, and click Update Edit Zone Text to see the effect of programmatically updating the InstructionText property. The instruction text appears near the top of the zone.

Remarks

The InstructionText property is used to hold a set of instructions that are provided for end users when a particular ToolZone control is displayed.

The value of this property, when set, can be saved automatically to a resource file by using a designer tool. For more information, see LocalizableAttribute and Globalization and Localization.

Notes to Inheritors

Tool zones in the Web Parts control set that derive from the ToolZone class (see the zones listed in the ToolZone class overview) override the InstructionText property to provide default instructions for end users.

Applies to

See also