HelpNavigator Enumerazione

Definizione

Spazio dei nomi:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Specifica le costanti che indicano quali elementi del file della Guida visualizzare.

public enum class HelpNavigator

public enum HelpNavigator

type HelpNavigator = 

Public Enum HelpNavigator

Ereditarietà

Object

ValueType

Enum

HelpNavigator

Campi

AssociateIndex	-2147483643	Il file della Guida viene aperto sulla voce dell'indice corrispondente alla prima lettera dell'argomento specificato.
Find	-2147483644	Il file della Guida viene aperto sulla pagina della ricerca.
Index	-2147483645	Il file della Guida viene aperto sull'indice.
KeywordIndex	-2147483642	Il file della Guida viene aperto sull'argomento con la voce di indice specificata, se esistente. In caso contrario verrà visualizzata la voce dell'indice più vicina alla parola chiave specificata.
TableOfContents	-2147483646	Il file della Guida viene aperto sul sommario.
Topic	-2147483647	Il file della Guida viene aperto su un argomento specificato, se esistente.
TopicId	-2147483641	Il file della Guida viene aperto sull'argomento indicato da un identificatore numerico dell'argomento.

Esempio

Nell'esempio di codice seguente viene visualizzato un modulo con tre pulsanti che possono essere usati per interagire con il file della Guida mspaint.chm. Il pulsante Mostra indice della Guida visualizza la scheda Indice per il file della Guida. Il pulsante Mostra guida visualizza il contenuto nel file della Guida in base al valore selezionato nell'elenco Guida guida . Il pulsante Mostra parola chiave visualizza il contenuto nel file della Guida in base alla parola chiave specificata nella casella di testo Parola chiave.

Ad esempio, per visualizzare la pagina Della Guida ovali in base al valore dell'indice, selezionare il valore KeywordIndex nell'elenco a discesa Guida guida, digitare ovali nella casella di testo Parametro e quindi fare clic sul pulsante Mostra guida. Per visualizzare l'argomento della Guida "Per disegnare con un pennello" nella parola chiave digitare mspaint.chm::/paint_brush.htm nella casella di testo Parola chiave e quindi fare clic sul pulsante Mostra parola chiave .

Nell'esempio viene usato il ShowHelp metodo per visualizzare le diverse schede della Guida e gli argomenti della Guida e il ShowHelpIndex metodo per visualizzare l'indice della Guida.

#using <System.dll>
#using <System.Drawing.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Drawing;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;
public ref class Form1: public System::Windows::Forms::Form
{
private:
   String^ helpfile;
   System::Windows::Forms::Button^ showIndex;
   System::Windows::Forms::Button^ showHelp;
   System::Windows::Forms::Label ^ label1;
   System::Windows::Forms::ComboBox^ navigatorCombo;
   System::Windows::Forms::Button^ showKeyword;
   System::Windows::Forms::TextBox^ keyword;
   System::Windows::Forms::Label ^ label2;
   System::Windows::Forms::Label ^ label3;
   System::Windows::Forms::TextBox^ parameterTextBox;

public:
   Form1()
   {
      helpfile = "mspaint.chm";
      this->showIndex = gcnew System::Windows::Forms::Button;
      this->showHelp = gcnew System::Windows::Forms::Button;
      this->navigatorCombo = gcnew System::Windows::Forms::ComboBox;
      this->label1 = gcnew System::Windows::Forms::Label;
      this->showKeyword = gcnew System::Windows::Forms::Button;
      this->keyword = gcnew System::Windows::Forms::TextBox;
      this->label2 = gcnew System::Windows::Forms::Label;
      this->label3 = gcnew System::Windows::Forms::Label;
      this->parameterTextBox = gcnew System::Windows::Forms::TextBox;
      
      // Help Navigator Label
      this->label1->Location = System::Drawing::Point( 112, 64 );
      this->label1->Size = System::Drawing::Size( 168, 16 );
      this->label1->Text = "Help Navigator:";
      
      // Keyword Label 
      this->label2->Location = System::Drawing::Point( 120, 184 );
      this->label2->Size = System::Drawing::Size( 100, 16 );
      this->label2->Text = "Keyword:";
      
      // Parameter Label
      this->label3->Location = System::Drawing::Point( 112, 120 );
      this->label3->Size = System::Drawing::Size( 168, 16 );
      this->label3->Text = "Parameter:";
      
      // Show Index Button
      this->showIndex->Location = System::Drawing::Point( 16, 16 );
      this->showIndex->Size = System::Drawing::Size( 264, 32 );
      this->showIndex->TabIndex = 0;
      this->showIndex->Text = "Show Help Index";
      this->showIndex->Click += gcnew System::EventHandler( this, &Form1::showIndex_Click );
      
      // Show Help Button
      this->showHelp->Location = System::Drawing::Point( 16, 80 );
      this->showHelp->Size = System::Drawing::Size( 80, 80 );
      this->showHelp->TabIndex = 1;
      this->showHelp->Text = "Show Help";
      this->showHelp->Click += gcnew System::EventHandler( this, &Form1::showHelp_Click );
      
      // Show Keyword Button
      this->showKeyword->Location = System::Drawing::Point( 16, 192 );
      this->showKeyword->Size = System::Drawing::Size( 88, 32 );
      this->showKeyword->TabIndex = 4;
      this->showKeyword->Text = "Show Keyword";
      this->showKeyword->Click += gcnew System::EventHandler( this, &Form1::showKeyword_Click );
      
      // Help Navigator ComboBox
      this->navigatorCombo->DropDownStyle = System::Windows::Forms::ComboBoxStyle::DropDownList;
      this->navigatorCombo->Location = System::Drawing::Point( 112, 80 );
      this->navigatorCombo->Size = System::Drawing::Size( 168, 21 );
      this->navigatorCombo->TabIndex = 2;
      
      // Keyword TextBox
      this->keyword->Location = System::Drawing::Point( 120, 200 );
      this->keyword->Size = System::Drawing::Size( 160, 20 );
      this->keyword->TabIndex = 5;
      this->keyword->Text = "";
      
      // Parameter TextBox
      this->parameterTextBox->Location = System::Drawing::Point( 112, 136 );
      this->parameterTextBox->Size = System::Drawing::Size( 168, 20 );
      this->parameterTextBox->TabIndex = 8;
      this->parameterTextBox->Text = "";
      
      // Set up how the form should be displayed and add the controls to the form.
      this->ClientSize = System::Drawing::Size( 292, 266 );
      array<System::Windows::Forms::Control^>^formControls = {this->parameterTextBox,this->label3,this->label2,this->keyword,this->showKeyword,this->label1,this->navigatorCombo,this->showHelp,this->showIndex};
      this->Controls->AddRange( formControls );
      this->FormBorderStyle = System::Windows::Forms::FormBorderStyle::FixedDialog;
      this->Text = "Help App";
      
      // Load the various values of the HelpNavigator enumeration
      // into the combo box.
      TypeConverter^ converter;
      converter = TypeDescriptor::GetConverter( HelpNavigator::typeid );
      System::Collections::IEnumerator^ myEnum = converter->GetStandardValues()->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         Object^ value = safe_cast<Object^>(myEnum->Current);
         navigatorCombo->Items->Add( value );
      }
   }

private:
   void showIndex_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      
      // Display the index for the help file.
      Help::ShowHelpIndex( this, helpfile );
   }

   void showHelp_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      
      // Display Help using the Help navigator enumeration
      // that is selected in the combo box. Some enumeration
      // values make use of an extra parameter, which can
      // be passed in through the Parameter text box.
      HelpNavigator navigator = HelpNavigator::TableOfContents;
      if ( navigatorCombo->SelectedItem != nullptr )
      {
         navigator =  *safe_cast<HelpNavigator^>(navigatorCombo->SelectedItem);
      }

      Help::ShowHelp( this, helpfile, navigator, parameterTextBox->Text );
   }

   void showKeyword_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      
      // Display help using the provided keyword.
      Help::ShowHelp( this, helpfile, keyword->Text );
   }
};

[STAThread]
int main()
{
   Application::Run( gcnew Form1 );
}

using System;
using System.Drawing;
using System.ComponentModel;
using System.Windows.Forms;

public class Form1 : System.Windows.Forms.Form
{
    private const string helpfile = "mspaint.chm";
    private System.Windows.Forms.Button showIndex;
    private System.Windows.Forms.Button showHelp;
    private System.Windows.Forms.Label label1;
    private System.Windows.Forms.ComboBox navigatorCombo;
    private System.Windows.Forms.Button showKeyword;
    private System.Windows.Forms.TextBox keyword;
    private System.Windows.Forms.Label label2;
    private System.Windows.Forms.Label label3;
    private System.Windows.Forms.TextBox parameterTextBox;

    [STAThread]
    static void Main() 
    {
        Application.Run(new Form1());
    }

    public Form1()
    {
        this.showIndex = new System.Windows.Forms.Button();
        this.showHelp = new System.Windows.Forms.Button();
        this.navigatorCombo = new System.Windows.Forms.ComboBox();
        this.label1 = new System.Windows.Forms.Label();
        this.showKeyword = new System.Windows.Forms.Button();
        this.keyword = new System.Windows.Forms.TextBox();
        this.label2 = new System.Windows.Forms.Label();
        this.label3 = new System.Windows.Forms.Label();
        this.parameterTextBox = new System.Windows.Forms.TextBox();

        // Help Navigator Label
        this.label1.Location = new System.Drawing.Point(112, 64);
        this.label1.Size = new System.Drawing.Size(168, 16);
        this.label1.Text = "Help Navigator:";

        // Keyword Label
        this.label2.Location = new System.Drawing.Point(120, 184);
        this.label2.Size = new System.Drawing.Size(100, 16);
        this.label2.Text = "Keyword:";

        // Parameter Label
        this.label3.Location = new System.Drawing.Point(112, 120);
        this.label3.Size = new System.Drawing.Size(168, 16);
        this.label3.Text = "Parameter:";

        // Show Index Button
        this.showIndex.Location = new System.Drawing.Point(16, 16);
        this.showIndex.Size = new System.Drawing.Size(264, 32);
        this.showIndex.TabIndex = 0;
        this.showIndex.Text = "Show Help Index";
        this.showIndex.Click += new System.EventHandler(this.showIndex_Click);

        // Show Help Button
        this.showHelp.Location = new System.Drawing.Point(16, 80);
        this.showHelp.Size = new System.Drawing.Size(80, 80);
        this.showHelp.TabIndex = 1;
        this.showHelp.Text = "Show Help";
        this.showHelp.Click += new System.EventHandler(this.showHelp_Click);

        // Show Keyword Button
        this.showKeyword.Location = new System.Drawing.Point(16, 192);
        this.showKeyword.Size = new System.Drawing.Size(88, 32);
        this.showKeyword.TabIndex = 4;
        this.showKeyword.Text = "Show Keyword";
        this.showKeyword.Click += new System.EventHandler(this.showKeyword_Click);

        // Help Navigator ComboBox
        this.navigatorCombo.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
        this.navigatorCombo.Location = new System.Drawing.Point(112, 80);
        this.navigatorCombo.Size = new System.Drawing.Size(168, 21);
        this.navigatorCombo.TabIndex = 2;

        // Keyword TextBox
        this.keyword.Location = new System.Drawing.Point(120, 200);
        this.keyword.Size = new System.Drawing.Size(160, 20);
        this.keyword.TabIndex = 5;
        this.keyword.Text = "";

        // Parameter TextBox
        this.parameterTextBox.Location = new System.Drawing.Point(112, 136);
        this.parameterTextBox.Size = new System.Drawing.Size(168, 20);
        this.parameterTextBox.TabIndex = 8;
        this.parameterTextBox.Text = "";

        // Set up how the form should be displayed and add the controls to the form.
        this.ClientSize = new System.Drawing.Size(292, 266);
        this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                        this.parameterTextBox, this.label3,
                                        this.label2, this.keyword,
                                        this.showKeyword, this.label1,
                                        this.navigatorCombo, this.showHelp,
                                        this.showIndex});
        this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
        this.Text = "Help App";

        // Load the various values of the HelpNavigator enumeration
        // into the combo box.
        TypeConverter converter;
        converter = TypeDescriptor.GetConverter(typeof(HelpNavigator));
        foreach(object value in converter.GetStandardValues()) 
        {
            navigatorCombo.Items.Add(value);
        }
    }

    private void showIndex_Click(object sender, System.EventArgs e)
    {
        // Display the index for the help file.
        Help.ShowHelpIndex(this, helpfile);
    }
    private void showHelp_Click(object sender, System.EventArgs e)
    {
        // Display Help using the Help navigator enumeration
        // that is selected in the combo box. Some enumeration
        // values make use of an extra parameter, which can
        // be passed in through the Parameter text box.
        HelpNavigator navigator = HelpNavigator.TableOfContents;
        if (navigatorCombo.SelectedItem != null)
        {
            navigator = (HelpNavigator)navigatorCombo.SelectedItem;
        }
        Help.ShowHelp(this, helpfile, navigator, parameterTextBox.Text);
    }
    private void showKeyword_Click(object sender, System.EventArgs e)
    {
        // Display help using the provided keyword.
        Help.ShowHelp(this, helpfile, keyword.Text);
    }
}

Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms

Public Class Form1
    Inherits System.Windows.Forms.Form
    Private helpfile As String = "mspaint.chm"
    Private WithEvents showIndex As System.Windows.Forms.Button
    Private WithEvents showHelp As System.Windows.Forms.Button
    Private WithEvents label1 As System.Windows.Forms.Label
    Private WithEvents navigatorCombo As System.Windows.Forms.ComboBox
    Private WithEvents showKeyword As System.Windows.Forms.Button
    Private WithEvents keyword As System.Windows.Forms.TextBox
    Private WithEvents label2 As System.Windows.Forms.Label
    Private WithEvents label3 As System.Windows.Forms.Label
    Private WithEvents parameterTextBox As System.Windows.Forms.TextBox

    <STAThread()> _
    Shared Sub Main()
        Application.Run(New Form1)
    End Sub
    
    Public Sub New()
        Me.showIndex = New System.Windows.Forms.Button
        Me.showHelp = New System.Windows.Forms.Button
        Me.navigatorCombo = New System.Windows.Forms.ComboBox
        Me.label1 = New System.Windows.Forms.Label
        Me.showKeyword = New System.Windows.Forms.Button
        Me.keyword = New System.Windows.Forms.TextBox
        Me.label2 = New System.Windows.Forms.Label
        Me.label3 = New System.Windows.Forms.Label
        Me.parameterTextBox = New System.Windows.Forms.TextBox

        ' Help Navigator Label
        Me.label1.Location = New System.Drawing.Point(112, 64)
        Me.label1.Size = New System.Drawing.Size(168, 16)
        Me.label1.Text = "Help Navigator:"

        ' Keyword Label
        Me.label2.Location = New System.Drawing.Point(120, 184)
        Me.label2.Size = New System.Drawing.Size(100, 16)
        Me.label2.Text = "Keyword:"

        ' Parameter Label
        Me.label3.Location = New System.Drawing.Point(112, 120)
        Me.label3.Size = New System.Drawing.Size(168, 16)
        Me.label3.Text = "Parameter:"

        ' Show Index Button
        Me.showIndex.Location = New System.Drawing.Point(16, 16)
        Me.showIndex.Size = New System.Drawing.Size(264, 32)
        Me.showIndex.TabIndex = 0
        Me.showIndex.Text = "Show Help Index"

        ' Show Help Button
        Me.showHelp.Location = New System.Drawing.Point(16, 80)
        Me.showHelp.Size = New System.Drawing.Size(80, 80)
        Me.showHelp.TabIndex = 1
        Me.showHelp.Text = "Show Help"

        ' Show Keyword Button
        Me.showKeyword.Location = New System.Drawing.Point(16, 192)
        Me.showKeyword.Size = New System.Drawing.Size(88, 32)
        Me.showKeyword.TabIndex = 4
        Me.showKeyword.Text = "Show Keyword"

        ' Help Navigator Combo
        ' 
        Me.navigatorCombo.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList
        Me.navigatorCombo.Location = New System.Drawing.Point(112, 80)
        Me.navigatorCombo.Size = New System.Drawing.Size(168, 21)
        Me.navigatorCombo.TabIndex = 2

        ' Keyword TextBox
        Me.keyword.Location = New System.Drawing.Point(120, 200)
        Me.keyword.Size = New System.Drawing.Size(160, 20)
        Me.keyword.TabIndex = 5
        Me.keyword.Text = ""
        ' 
        ' Parameter TextBox
        ' 
        Me.parameterTextBox.Location = New System.Drawing.Point(112, 136)
        Me.parameterTextBox.Size = New System.Drawing.Size(168, 20)
        Me.parameterTextBox.TabIndex = 8
        Me.parameterTextBox.Text = ""

        ' Set up how the form should be displayed and add the controls to the form.
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.parameterTextBox, _
                                Me.label3, Me.label2, Me.keyword, Me.showKeyword, _
                                Me.label1, Me.navigatorCombo, Me.showHelp, Me.showIndex})
        Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog
        Me.Text = "Help App"

        ' Load the various values of the HelpNavigator enumeration
        ' into the combo box. 
        Dim converter As TypeConverter
        converter = TypeDescriptor.GetConverter(GetType(HelpNavigator))

        Dim value As Object
        For Each value In converter.GetStandardValues()
            navigatorCombo.Items.Add(value)
        Next value
    End Sub

    Private Sub showIndex_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles showIndex.Click
        ' Display the index for the Help file.
        Help.ShowHelpIndex(Me, helpfile)
    End Sub
    Private Sub showHelp_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles showHelp.Click
        ' Display Help using the Help navigator enumeration
        ' that is selected in the combo box. Some enumeration
        ' values make use of an extra parameter, which can
        ' be passed in through the Parameter text box.
        Dim navigator As HelpNavigator = HelpNavigator.TableOfContents
        If (navigatorCombo.SelectedItem IsNot Nothing) Then
            navigator = CType(navigatorCombo.SelectedItem, HelpNavigator)
        End If
        Help.ShowHelp(Me, helpfile, navigator, parameterTextBox.Text)
    End Sub
    Private Sub showKeyword_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles showKeyword.Click
        ' Display Help using the provided keyword. 
        Help.ShowHelp(Me, helpfile, keyword.Text)
    End Sub
End Class

Commenti

Questa enumerazione viene usata dalle Help classi e HelpProvider per fornire l'accesso a elementi specifici di un file della Guida. Ad esempio, se usato con il HelpProvider componente che fornisce F1 Help, è possibile specificare il valore TopicId o Topic per aprire la Guida a un argomento specifico del contesto.