IndentedTextWriter Clase

Definición

public ref class IndentedTextWriter : System::IO::TextWriter

public class IndentedTextWriter : System.IO.TextWriter

type IndentedTextWriter = class
    inherit TextWriter

Public Class IndentedTextWriter
Inherits TextWriter

Herencia

Object

MarshalByRefObject

TextWriter

IndentedTextWriter

Ejemplos

En el ejemplo de código siguiente se muestra el uso de un IndentedTextWriter para escribir texto en distintos niveles de sangría.

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

using namespace System;
using namespace System::CodeDom;
using namespace System::CodeDom::Compiler;
using namespace System::ComponentModel;
using namespace System::IO;
using namespace System::Windows::Forms;
public ref class Form1: public System::Windows::Forms::Form
{
private:
   System::Windows::Forms::TextBox^ textBox1;

   String^ CreateMultilevelIndentString()
   {
      
      // Creates a TextWriter to use as the base output writer.
      System::IO::StringWriter^ baseTextWriter = gcnew System::IO::StringWriter;
      
      // Create an IndentedTextWriter and set the tab string to use 
      // as the indentation string for each indentation level.
      System::CodeDom::Compiler::IndentedTextWriter^ indentWriter = gcnew IndentedTextWriter( baseTextWriter,"    " );
      
      // Sets the indentation level.
      indentWriter->Indent = 0;
      
      // Output test strings at stepped indentations through a recursive loop method.
      WriteLevel( indentWriter, 0, 5 );
      
      // Return the resulting string from the base StringWriter.
      return baseTextWriter->ToString();
   }


   void WriteLevel( IndentedTextWriter^ indentWriter, int level, int totalLevels )
   {
      
      // Output a test string with a new-line character at the end.
      indentWriter->WriteLine( "This is a test phrase. Current indentation level: {0}", level );
      
      // If not yet at the highest recursion level, call this output method for the next level of indentation.
      if ( level < totalLevels )
      {
         
         // Increase the indentation count for the next level of indented output.
         indentWriter->Indent++;
         
         // Call the WriteLevel method to write test output for the next level of indentation.
         WriteLevel( indentWriter, level + 1, totalLevels );
         
         // Restores the indentation count for this level after the recursive branch method has returned.
         indentWriter->Indent--;
      }
      else
      // Outputs a string using the WriteLineNoTabs method.
            indentWriter->WriteLineNoTabs( "This is a test phrase written with the IndentTextWriter.WriteLineNoTabs method." );
      // Outputs a test string with a new-line character at the end.
      indentWriter->WriteLine( "This is a test phrase. Current indentation level: {0}", level );
   }


   void button1_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
   {
      textBox1->Text = CreateMultilevelIndentString();
   }


public:
   Form1()
   {
      System::Windows::Forms::Button^ button1 = gcnew System::Windows::Forms::Button;
      this->textBox1 = gcnew System::Windows::Forms::TextBox;
      this->SuspendLayout();
      this->textBox1->Anchor = (System::Windows::Forms::AnchorStyles)(System::Windows::Forms::AnchorStyles::Top | System::Windows::Forms::AnchorStyles::Bottom | System::Windows::Forms::AnchorStyles::Left | System::Windows::Forms::AnchorStyles::Right);
      this->textBox1->Location = System::Drawing::Point( 8, 40 );
      this->textBox1->Multiline = true;
      this->textBox1->Name = "textBox1";
      this->textBox1->Size = System::Drawing::Size( 391, 242 );
      this->textBox1->TabIndex = 0;
      this->textBox1->Text = "";
      button1->Location = System::Drawing::Point( 11, 8 );
      button1->Name = "button1";
      button1->Size = System::Drawing::Size( 229, 23 );
      button1->TabIndex = 1;
      button1->Text = "Generate string using IndentedTextWriter";
      button1->Click += gcnew System::EventHandler( this, &Form1::button1_Click );
      this->AutoScaleBaseSize = System::Drawing::Size( 5, 13 );
      this->ClientSize = System::Drawing::Size( 407, 287 );
      this->Controls->Add( button1 );
      this->Controls->Add( this->textBox1 );
      this->Name = "Form1";
      this->Text = "IndentedTextWriter example";
      this->ResumeLayout( false );
   }

};


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

using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.ComponentModel;
using System.IO;
using System.Windows.Forms;

namespace IndentedTextWriterExample
{
    public class Form1 : System.Windows.Forms.Form
    {
        private System.Windows.Forms.TextBox textBox1;

        private string CreateMultilevelIndentString()
        {
            // Creates a TextWriter to use as the base output writer.
            System.IO.StringWriter baseTextWriter = new System.IO.StringWriter();

            // Create an IndentedTextWriter and set the tab string to use
            // as the indentation string for each indentation level.
            System.CodeDom.Compiler.IndentedTextWriter indentWriter = new IndentedTextWriter(baseTextWriter, "    ");

            // Sets the indentation level.
            indentWriter.Indent = 0;

            // Output test strings at stepped indentations through a recursive loop method.
            WriteLevel(indentWriter, 0, 5);

            // Return the resulting string from the base StringWriter.
            return baseTextWriter.ToString();
        }

        private void WriteLevel(IndentedTextWriter indentWriter, int level, int totalLevels)
        {
            // Output a test string with a new-line character at the end.
            indentWriter.WriteLine("This is a test phrase. Current indentation level: "+level.ToString());

            // If not yet at the highest recursion level, call this output method for the next level of indentation.
            if( level < totalLevels )
            {
                // Increase the indentation count for the next level of indented output.
                indentWriter.Indent++;

                // Call the WriteLevel method to write test output for the next level of indentation.
                WriteLevel(indentWriter, level+1, totalLevels);

                // Restores the indentation count for this level after the recursive branch method has returned.
                indentWriter.Indent--;
            }
            else
            {
                // Outputs a string using the WriteLineNoTabs method.
                indentWriter.WriteLineNoTabs("This is a test phrase written with the IndentTextWriter.WriteLineNoTabs method.");
            }

            // Outputs a test string with a new-line character at the end.
            indentWriter.WriteLine("This is a test phrase. Current indentation level: "+level.ToString());
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            textBox1.Text = CreateMultilevelIndentString();
        }

        public Form1()
        {
            System.Windows.Forms.Button button1 = new System.Windows.Forms.Button();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.SuspendLayout();
            this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                | System.Windows.Forms.AnchorStyles.Left)
                | System.Windows.Forms.AnchorStyles.Right)));
            this.textBox1.Location = new System.Drawing.Point(8, 40);
            this.textBox1.Multiline = true;
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(391, 242);
            this.textBox1.TabIndex = 0;
            this.textBox1.Text = "";
            button1.Location = new System.Drawing.Point(11, 8);
            button1.Name = "button1";
            button1.Size = new System.Drawing.Size(229, 23);
            button1.TabIndex = 1;
            button1.Text = "Generate string using IndentedTextWriter";
            button1.Click += new System.EventHandler(this.button1_Click);
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(407, 287);
            this.Controls.Add(button1);
            this.Controls.Add(this.textBox1);
            this.Name = "Form1";
            this.Text = "IndentedTextWriter example";
            this.ResumeLayout(false);
        }

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

Imports System.CodeDom
Imports System.CodeDom.Compiler
Imports System.ComponentModel
Imports System.IO
Imports System.Windows.Forms

Public Class Form1
   Inherits System.Windows.Forms.Form
   Private textBox1 As System.Windows.Forms.TextBox 
   
   Private Function CreateMultilevelIndentString() As String
        ' Create a TextWriter to use as the base output writer.
        Dim baseTextWriter As New System.IO.StringWriter
      
        ' Create an IndentedTextWriter and set the tab string to use 
        ' as the indentation string for each indentation level.
        Dim indentWriter = New IndentedTextWriter(baseTextWriter, "    ")

        ' Set the indentation level.
        indentWriter.Indent = 0

        ' Output test strings at stepped indentations through a recursive loop method.
        WriteLevel(indentWriter, 0, 5)
      
        ' Return the resulting string from the base StringWriter.
        Return baseTextWriter.ToString()
    End Function

    Private Sub WriteLevel(ByVal indentWriter As IndentedTextWriter, ByVal level As Integer, ByVal totalLevels As Integer)
        ' Outputs a test string with a new-line character at the end.
        indentWriter.WriteLine(("This is a test phrase. Current indentation level: " + level.ToString()))

        ' If not yet at the highest recursion level, call this output method for the next level of indentation.
        If level < totalLevels Then
            ' Increase the indentation count for the next level of indented output.
            indentWriter.Indent += 1

            ' Call the WriteLevel method to write test output for the next level of indentation.
            WriteLevel(indentWriter, level + 1, totalLevels)

            ' Restores the indentation count for this level after the recursive branch method has returned.
            indentWriter.Indent -= 1

        Else
            ' Output a string using the WriteLineNoTabs method.
            indentWriter.WriteLineNoTabs("This is a test phrase written with the IndentTextWriter.WriteLineNoTabs method.")
        End If

        ' Outputs a test string with a new-line character at the end.
        indentWriter.WriteLine(("This is a test phrase. Current indentation level: " + level.ToString()))
    End Sub

    Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
        textBox1.Text = CreateMultilevelIndentString()
    End Sub

    Public Sub New()
        Dim button1 As New System.Windows.Forms.Button
        Me.textBox1 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        Me.textBox1.Anchor = CType(System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left Or System.Windows.Forms.AnchorStyles.Right, System.Windows.Forms.AnchorStyles)
        Me.textBox1.Location = New System.Drawing.Point(8, 40)
        Me.textBox1.Multiline = True
        Me.textBox1.Name = "textBox1"
        Me.textBox1.Size = New System.Drawing.Size(391, 242)
        Me.textBox1.TabIndex = 0
        Me.textBox1.Text = ""
        button1.Location = New System.Drawing.Point(11, 8)
        button1.Name = "button1"
        button1.Size = New System.Drawing.Size(229, 23)
        button1.TabIndex = 1
        button1.Text = "Generate string using IndentedTextWriter"
        AddHandler button1.Click, AddressOf Me.button1_Click
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(407, 287)
        Me.Controls.Add(button1)
        Me.Controls.Add(Me.textBox1)
        Me.Name = "Form1"
        Me.Text = "IndentedTextWriter example"
        Me.ResumeLayout(False)
    End Sub

    <STAThread()> _
    Shared Sub Main()
        Application.Run(New Form1)
    End Sub
End Class

Comentarios

IndentedTextWriter extiende un TextWriter proporcionando métodos que insertan una cadena de tabulación y realizan un seguimiento del nivel de sangría actual. El texto con formato con varios niveles de sangría es útil para el código generado, por lo que las implementaciones del generador de código CodeDOM usan esta clase.

La cadena de tabulación es la cadena de la que consta cada sangría. Normalmente, la cadena de tabulación contiene espacios en blanco.

Constructores

Campos

Propiedades

Métodos

Implementaciones de interfaz explícitas

Métodos de extensión

Se aplica a