DataFormats クラスとは? わかりやすく解説

DataFormats クラス

static定義済み Clipboard 形式名を提供します。これらを使用して IDataObject に格納するデータ形式識別します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文構文

public class DataFormats
public ref class DataFormats
public class DataFormats
public class DataFormats
解説解説
使用例使用例

myFormat という名前の新しデータ形式作成するコード例次に示します。このコードMyNewObject作成して DataObject格納しますDataObjectClipboardコピーされます。

次に DataObjectClipboard から取得されMyNewObject復元されます。MyNewObject の値はテキスト ボックス表示されます。このコードでは、textBox1作成されており、フォーム上に配置されている必要があります

Option Explicit
Option Strict

Imports System
Imports System.Windows.Forms

Public Class MyClass1
    Inherits Form
    Private textBox1 As TextBox

    Public Sub MyClipboardMethod()
        ' Creates a new data format.
        Dim myFormat As DataFormats.Format
 = _
            DataFormats.GetFormat("myFormat")
        
        ' Creates a new object and store it in a DataObject using myFormat
 
        ' as the type of format. 
        Dim myObject As New
 MyNewObject()
        Dim myDataObject As New
 DataObject(myFormat.Name, myObject)
        
        ' Copies myObject into the clipboard.
        Clipboard.SetDataObject(myDataObject)
        
        ' Performs some processing steps.
        ' Retrieves the data from the clipboard.
        Dim myRetrievedObject As IDataObject
 = Clipboard.GetDataObject()
        
        ' Converts the IDataObject type to MyNewObject type. 
        Dim myDereferencedObject As MyNewObject
 = _
            CType(myRetrievedObject.GetData(myFormat.Name), MyNewObject)
        
        ' Print the value of the Object in a textBox.
        textBox1.Text = myDereferencedObject.MyObjectValue
    End Sub 'MyClipboardMethod
End Class 'MyClass


' Creates a new type.
<Serializable()> Public Class MyNewObject
    Inherits Object
    Private myValue As String
    
    
    ' Creates a default constructor for the class.
    Public Sub New()
        myValue = "This is the value of the class"
    End Sub 'New
    
    ' Creates a property to retrieve or set the value.
    
    Public Property MyObjectValue() As
 String
        Get
            Return myValue
        End Get
        Set
            myValue = value
        End Set
    End Property
End Class 'MyNewObject

using System;
using System.Windows.Forms;

public class MyClass : Form {
    protected TextBox textBox1;
    
    public void MyClipboardMethod() {
       // Creates a new data format.
       DataFormats.Format myFormat = DataFormats.GetFormat("myFormat");
       
       /* Creates a new object and stores it in
 a DataObject using myFormat 
        * as the type of format. */
       MyNewObject myObject = new MyNewObject();
       DataObject myDataObject = new DataObject(myFormat.Name,
 myObject);
 
       // Copies myObject into the clipboard.
       Clipboard.SetDataObject(myDataObject);
 
       // Performs some processing steps.
 
       // Retrieves the data from the clipboard.
       IDataObject myRetrievedObject = Clipboard.GetDataObject();
 
       // Converts the IDataObject type to MyNewObject type. 
       MyNewObject myDereferencedObject = (MyNewObject)myRetrievedObject.GetData(myFormat.Name);
 
       // Prints the value of the Object in a textBox.
       textBox1.Text = myDereferencedObject.MyObjectValue;
    }
 }
 
 // Creates a new type.
 [Serializable]
 public class MyNewObject : Object {
    private string myValue;
 
    // Creates a default constructor for the class.
    public MyNewObject() {
       myValue = "This is the value of the class";
    }
 
    // Creates a property to retrieve or set the value.
    public string MyObjectValue {
       get {
          return myValue;
       }
       set {
          myValue = value;
       }
    }
 }

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

using namespace System;
using namespace System::Windows::Forms;

// Creates a new type.

[Serializable]
public ref class MyNewObject: public
 Object
{
private:
   String^ myValue;

public:

   // Creates a default constructor for the class.
   MyNewObject()
   {
      myValue = "This is the value of the class";
   }


   property String^ MyObjectValue 
   {

      // Creates a property to retrieve or set the value.
      String^ get()
      {
         return myValue;
      }

      void set( String^ value )
      {
         myValue = value;
      }

   }

};

public ref class MyClass: public
 Form
{
protected:
   TextBox^ textBox1;

public:
   void MyClipboardMethod()
   {
      
      // Creates a new data format.
      DataFormats::Format^ myFormat = DataFormats::GetFormat( "myFormat"
 );
      
      /* Creates a new object and stores it in
 a DataObject using myFormat 
               * as the type of format. */
      MyNewObject^ myObject = gcnew MyNewObject;
      DataObject^ myDataObject = gcnew DataObject( myFormat->Name,myObject );
      
      // Copies myObject into the clipboard.
      Clipboard::SetDataObject( myDataObject );
      
      // Performs some processing steps.
      // Retrieves the data from the clipboard.
      IDataObject^ myRetrievedObject = Clipboard::GetDataObject();
      
      // Converts the IDataObject type to MyNewObject type. 
      MyNewObject^ myDereferencedObject = dynamic_cast<MyNewObject^>(myRetrievedObject->GetData(
 myFormat->Name ));
      
      // Prints the value of the Object in a textBox.
      textBox1->Text = myDereferencedObject->MyObjectValue;
   }

};

import System.*;
import System.Windows.Forms.*;

public class MyClass extends Form
{
    protected TextBox textBox1;

    public void MyClipboardMethod()
    {
        // Creates a new data format.
        DataFormats.Format myFormat = DataFormats.GetFormat("myFormat");
        /*  Creates a new object and stores it in
 a DataObject using myFormat 
            as the type of format. 
         */
        MyNewObject myObject = new MyNewObject();
        DataObject myDataObject = new DataObject(myFormat.get_Name()
,myObject);

        // Copies myObject into the clipboard.
        Clipboard.SetDataObject(myDataObject);

        // Performs some processing steps.
        // Retrieves the data from the clipboard.
        IDataObject myRetrievedObject = Clipboard.GetDataObject();

        // Converts the IDataObject type to MyNewObject type. 
        MyNewObject myDereferencedObject = 
            (MyNewObject)(myRetrievedObject.GetData(myFormat.get_Name()));

        // Prints the value of the Object in a textBox.
        textBox1.set_Text(myDereferencedObject.get_MyObjectValue());
    } //MyClipboardMethod
} //MyClass

// Creates a new type.
/** @attribute Serializable()
 */
public class MyNewObject extends Object
{
    private String myValue;
    // Creates a default constructor for the class.
    public MyNewObject()
    {
        myValue = "This is the value of the class";
    } //MyNewObject

    // Creates a property to retrieve or set the value.
    /** @property 
     */
    public String get_MyObjectValue()
    {
        return myValue;
    } //get_MyObjectValue

    /** @property 
     */
    public void set_MyObjectValue(String value)
    {
        myValue = value;
    } //set_MyObjectValue
} //MyNewObject
import System;
import System.Windows.Forms;

public class MyClass extends
 Form {
    protected var textBox1 : TextBox;
    
    public function MyClipboardMethod() {
       // Create a new data format.
       var myFormat : DataFormats.Format = DataFormats.GetFormat("myFormat");
       
       /* Create a new object and store it in a DataObject import
 the myFormat 
        * as the type of format. */
       var myObject : MyNewObject = new MyNewObject();
       var myDataObject : DataObject = new
 DataObject("myFormat", myObject);
 
       // Copy myObject into the clipboard.
       Clipboard.SetDataObject(myDataObject);
 
       // Perform some processing steps.
 
       // Retrieve the data from the clipboard.
       var myRetrievedObject : IDataObject = Clipboard.GetDataObject();
 
       // Convert the IDataObject type to MyNewObject type. 
       var myDereferencedObject : MyNewObject = MyNewObject(myRetrievedObject.GetData("myFormat"));
 
       // Print the value of the Object in a textBox.
       textBox1.Text = myDereferencedObject.MyObjectValue;
    }
 }
 
 // Create a new type.
Serializable public class MyNewObject extends
 Object {
    private var myValue : String;
 
    // Create a default constructor for the class.
    public function MyNewObject() {
       myValue = "This is the value of the class";
    }
 
    // Create a property to retrieve or set the value.
    public function get
 MyObjectValue() : String {
          return myValue;
    }
       
    public function set
 MyObjectValue(value : String) {
          myValue = value;
    }
 }
 
継承階層継承階層
System.Object
  System.Windows.Forms.DataFormats
スレッド セーフスレッド セーフ
この型の public static (Visual Basic では Shared) メンバはすべて、スレッド セーフです。インスタンス メンバ場合は、スレッド セーフであるとは限りません。
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参照参照
関連項目
DataFormats メンバ
System.Windows.Forms 名前空間
Clipboard クラス
DataObject
DataFormats.Format
IDataObject
SetData
GetData
GetFormats
GetDataPresent
GetData
GetDataPresent
GetFormats
SetData



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