DataFormats Class
Assembly: System.Windows.Forms (in system.windows.forms.dll)
The IDataObject and DataObject classes also use the static format list to determine the type of data that is retrieved from the system Clipboard, or that is transferred in a drag-and-drop operation.
The GetFormat method allows you to:
-
Get a predefined DataFormats.Format object for a format name or ID number.
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Add a new format name/ID number pair to the static list in this class, and to register the format with the Windows registry as a Clipboard format when you pass it the format name.
You can get the Id number or format Name from the appropriate property in the DataFormats.Format instance.
The following code example creates a new data format named myFormat. The code then creates a MyNewObject which it stores in a DataObject. The DataObject is copied to the Clipboard.
Next, the DataObject is retrieved from the Clipboard and the MyNewObject is recovered. The value of the MyNewObject is printed in a text box. This code requires that textBox1 has been created and placed on a form.
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
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; } }
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.