ToolZone.InstructionText Proprietà

public:
 virtual property System::String ^ InstructionText { System::String ^ get(); void set(System::String ^ value); };

public virtual string InstructionText { get; set; }

member this.InstructionText : string with get, set

Public Overridable Property InstructionText As String

Valore della proprietà

Stringa che contiene le indicazioni per gli utenti finali. Un valore predefinito appropriato per specifiche zone strumenti viene fornito dalle classi ToolZone derivate.

Esempio

Nell'esempio di codice seguente viene illustrato come usare la InstructionText proprietà con un controllo ereditato ToolZone . Nell'esempio viene illustrato come modificare il valore del testo dell'istruzione visualizzato in un EditorZone controllo utilizzando questa proprietà.

La prima parte dell'esempio di codice è un controllo utente a cui viene fatto riferimento nella pagina e consente di passare la pagina a modalità di visualizzazione diverse. Per altre informazioni sulle modalità di visualizzazione e su come consentire agli utenti di spostarsi tra di essi, vedere Procedura dettagliata: Modifica delle modalità di visualizzazione in una pagina web part.

<%@ 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>

<%@ control language="vb" classname="DisplayModeMenuVB"%>
<script runat="server">
  ' Use a field to reference the current WebPartManager.
  Dim _manager As WebPartManager

  Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs)
    AddHandler Page.InitComplete, AddressOf InitComplete
  End Sub

  Sub InitComplete(ByVal sender As Object, ByVal e As System.EventArgs)
    _manager = WebPartManager.GetCurrentWebPartManager(Page)
      
    Dim browseModeName As String = WebPartManager.BrowseDisplayMode.Name
      
    ' Fill the dropdown with the names of supported display modes.
    Dim mode As WebPartDisplayMode
    For Each mode In _manager.SupportedDisplayModes
      Dim modeName As String = mode.Name
      ' Make sure a mode is enabled before adding it.
      If mode.IsEnabled(_manager) Then
        Dim item As New ListItem(modeName, modeName)
        DisplayModeDropdown.Items.Add(item)
      End If
    Next mode
      
    ' 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 Then
      Panel2.Visible = True
      If _manager.Personalization.Scope = PersonalizationScope.User Then
        RadioButton1.Checked = True
      Else
        RadioButton2.Checked = True
      End If
    End If
   
  End Sub

  ' Change the page to the selected display mode.
  Sub DisplayModeDropdown_SelectedIndexChanged(ByVal sender As Object, _
    ByVal e As EventArgs)
    
    Dim selectedMode As String = DisplayModeDropdown.SelectedValue   
    Dim mode As WebPartDisplayMode = _
      _manager.SupportedDisplayModes(selectedMode)
    If Not (mode Is Nothing) Then
      _manager.DisplayMode = mode
    End If

  End Sub
   
  ' Set the selected item equal to the current display mode.
  Sub Page_PreRender(ByVal sender As Object, ByVal e As EventArgs)
    Dim items As ListItemCollection = DisplayModeDropdown.Items
    Dim selectedIndex As Integer = _
      items.IndexOf(items.FindByText(_manager.DisplayMode.Name))
    DisplayModeDropdown.SelectedIndex = selectedIndex

  End Sub

  ' Reset all of a user's personalization data for the page.
  Protected Sub LinkButton1_Click(ByVal sender As Object, _
    ByVal e As EventArgs)
    
    _manager.Personalization.ResetPersonalizationState()
    
  End Sub

  ' If not in User personalization scope, toggle into it.
  Protected Sub RadioButton1_CheckedChanged(ByVal sender As Object, _
    ByVal e As EventArgs)
    
    If _manager.Personalization.Scope = PersonalizationScope.Shared Then
      _manager.Personalization.ToggleScope()
    End If

  End Sub
   
  ' If not in Shared scope, and if user is allowed, toggle the scope.
  Protected Sub RadioButton2_CheckedChanged(ByVal sender As Object, _
    ByVal e As EventArgs)
    
    If _manager.Personalization.CanEnterSharedScope AndAlso _
      _manager.Personalization.Scope = PersonalizationScope.User Then
      _manager.Personalization.ToggleScope()
    End If

  End Sub

</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>

La seconda parte dell'esempio di codice mostra una classe parziale che contiene il codice per aggiornare la proprietà a livello di codice nel Button1_Click metodo .

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;
  }
}

Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts

Partial Public Class Toolzone_overview_vb

    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
        If TextBox1.Text = String.Empty Or TextBox1.Text.Length < 0 Then
            EditorZone1.InstructionText = String.Empty
        Else
            EditorZone1.InstructionText = Server.HtmlEncode(TextBox1.Text)
        End If
        TextBox1.Text = String.Empty
    End Sub

End Class

La terza parte dell'esempio di codice mostra una pagina Web che contiene due controlli ereditati ToolZone : un CatalogZone controllo e un EditorZone controllo . Ogni ToolZone controllo imposta alcune proprietà nel markup dichiarativo della pagina.

<%@ 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>

<%@ Page Language="VB" 
  Codefile="Toolzone_overview.vb"
  Inherits="Toolzone_overview_vb"  %>
<%@ register TagPrefix="uc1" 
  TagName="DisplayModeMenuVB" 
  Src="DisplayModeMenuVB.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:DisplayModeMenuVB 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>

È possibile caricare la pagina in un browser e passare tra le varie modalità di visualizzazione della pagina per vedere il comportamento delle diverse zone degli strumenti. Impostare la pagina in modalità di modifica, immettere del testo nella casella di testo e fare clic su Aggiorna testo zona modifica per visualizzare l'effetto dell'aggiornamento a livello di codice della InstructionText proprietà. Il testo dell'istruzione viene visualizzato nella parte superiore della zona.

Commenti

La InstructionText proprietà viene utilizzata per contenere un set di istruzioni fornite per gli utenti finali quando viene visualizzato un determinato ToolZone controllo.

Il valore di questa proprietà, se impostato, può essere salvato automaticamente in un file di risorse usando uno strumento di progettazione. Per altre informazioni, vedere LocalizableAttribute Globalizzazione e localizzazione.

Note per gli eredi

Le zone degli strumenti nel set di controlli Web part che derivano dalla ToolZone classe (vedere le zone elencate nella panoramica della classe) eseguono l'override della ToolZoneInstructionText proprietà per fornire istruzioni predefinite per gli utenti finali.

Si applica a

Vedi anche

• InstructionTextStyle
• controlli web part ASP.NET