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This sample has three examples of drag-and-drop functionality on a form in a Windows application:
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| This sample code is provided to illustrate a concept and should not be used in applications or Web sites, as it may not illustrate the safest coding practices. Microsoft assumes no liability for incidental or consequential damages should the sample code be used for purposes other than as intended. |
To open the sample file in Solution Explorer
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Click Download Sample.
The File Download message box appears.
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Click Open, and on the left column of the zip folder window, click Extract all files.
The Extraction Wizard opens.
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Click Next. You can change the directory that the files will be extracted to, and then click Next again.
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Make sure that the Show extracted files check box is selected, and click Finish.
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Double-click the sample's .sln file.
The sample solution is displayed in Solution Explorer. You might get a security warning that says the solution location is not trusted. Click OK to continue.
To run this sample
Demonstrates
This sample has three examples of drag-and-drop.
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TextBox Demonstrates how to prevent a drop on a control. You can drag text from one TextBox control to two others, one of which does not have the AllowDrop property set to True.
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TreeView Demonstrates how to move nodes from one TreeView control to another.
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PictureBox Demonstrates how to copy images. You can drag images from one PictureBox to another. The AllowDrop property does not appear in the Properties window, and so is set to True in the code.
The data to be dragged should be an instance of the String, Bitmap, or MetaFile class, or an object that implements the ISerializable or IDataObject interface.
See Also