Load a Dropped File Sample
This sample will open and display the contents of a file dropped on the sample. Methods demonstrated in this sample include:
In this sample, event handlers monitor the PreviewDragOver and PreviewDrop events on a TextBox. When an object is dragged over the TextBox, a PreviewDragOver event handler checks to see if the object is a single file, and adjusts the DragDropEffects to indicate that a single file can be dropped, and anything else cannot. When a single file is dropped on the TextBox, a PreviewDrop event handler displays the file contents in the TextBox.
This sample demonstrates a specific feature of the Windows Presentation Foundation (WPF) and, consequently, does not follow application development best practices. For comprehensive coverage of Windows Presentation Foundation (WPF) and Microsoft .NET Framework application development best practices, refer to the following as appropriate:
Accessibility - Accessibility Best Practices
Security - Windows Presentation Foundation Security
Localization - WPF Globalization and Localization Overview
Building the Sample
Install the Windows Software Development Kit (SDK) and open its build environment command window. On the Start menu, point to All Programs, Microsoft Windows SDK, and then click CMD Shell.
Download the sample, usually from the software development kit (SDK) documentation, to your hard disk drive.
To build the sample from the build environment command window, go to the source directory of the sample. At the command prompt, type MSBUILD.
To build the sample in Microsoft Visual Studio, load the sample solution or project file and then press CTRL+SHIFT+B.
Running the Sample
To run the compiled sample from the build environment command window, execute the .exe file in the Bin\Debug or Bin\Release folder contained under the sample source code folder.
To run the compiled sample with debugging in Visual Studio, press F5.