DataBoundLiteralControl クラスとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

DataBoundLiteralControl クラス

データバインディング式および静的なリテラルテキストを保持します。このクラスは継承できません。

名前空間: System.Web.UI
アセンブリ: System.Web (system.web.dll 内)
構文

Visual Basic (宣言)

Public NotInheritable Class
 DataBoundLiteralControl
    Inherits Control
    Implements ITextControl

Visual Basic (使用法)

Dim instance As DataBoundLiteralControl

public sealed class DataBoundLiteralControl
 : Control, ITextControl

C++

public ref class DataBoundLiteralControl sealed
 : public Control, ITextControl

public final class DataBoundLiteralControl
 extends Control implements ITextControl

JScript

public final class DataBoundLiteralControl
 extends Control implements ITextControl

解説

DataBoundLiteralControl クラスは、Text プロパティの値をビューステートに永続化します。

使用例

DataBoundLiteralControl オブジェクトを取得するクラスを作成し、このオブジェクトの Text プロパティを表示する方法を次のコード例に示します。

Visual Basic

Imports System
Imports System.Web
Imports System.Web.UI


Namespace Samples.AspNet.VB.Controls 
   
   Public Class MyControlVB
      Inherits Control     

      <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand,
 Name:="FullTrust")> _
      Protected Overrides Sub
 Render(Output As HtmlTextWriter)
         ' Checks if a DataBoundLiteralControl object is present.
         If HasControls() And TypeOf
 Controls(0) Is DataBoundLiteralControl Then
            

            ' Obtains the DataBoundLiteralControl instance.
            Dim boundLiteralControl As DataBoundLiteralControl
 = CType(Controls(0), DataBoundLiteralControl)
            ' Retrieves the text in the boundLiteralControl object.
            Dim text As String
 = boundLiteralControl.Text
            output.Write(("<h4>Your Message: "
 + text + "</h4>"))
         End If 
      End Sub 'Render  

   End Class 'MyControl
End Namespace 'MyUserControl

using System;
using System.Web;
using System.Web.UI;

namespace Samples.AspNet.CS.Controls 
{

   public class MyControl : Control 
   {
 
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand,
 Name="FullTrust")] 
    protected override void Render(HtmlTextWriter
 output) 
    {
      // Checks if a DataBoundLiteralControl object is present.
      if ( (HasControls()) && (Controls[0] is DataBoundLiteralControl)
 ) 
      {
        // Obtains the DataBoundLiteralControl instance.
        DataBoundLiteralControl boundLiteralControl = (DataBoundLiteralControl)Controls[0];
        // Retrieves the text in the boundLiteralControl object.
        String text = boundLiteralControl.Text;
        output.Write("<h4>Your Message: " +text+"</h4>");

      }
    }
   }    
}

/*File name: myDataBoundLiteralControl.jsl */
import System.*;
import System.Web.*;
import System.Web.UI.*;

public class MyControl extends Control
{
    protected void Render(HtmlTextWriter output)
    {
        // Checks if a DataBoundLiteralControl object is present.
        if (HasControls() && get_Controls().get_Item(0)
            instanceof DataBoundLiteralControl) {
            // Obtains the DataBoundLiteralControl instance.
            DataBoundLiteralControl boundLiteralControl =
                (DataBoundLiteralControl)get_Controls().get_Item(0);
            // Retrieves the text in the boundLiteralControl object.
            String text = boundLiteralControl.get_Text();
            output.Write("<h4>Your Message: " + text + "</h4>");
        }
    } //Render 
} //MyControl