Openfiledialog Multiple Files C#
Multiple filetyps in one filter - OpenFileDialog.NET Framework Also discuss all the other Microsoft libraries that are built on or extend the.NET Framework, including Managed Extensibility Framework (MEF), Charting Controls, CardSpace, Windows Identity Foundation (WIF), Point of Sale (POS), Transactions. OpenFileDialog has a number of properties and methods that make it a flexible way to get users to pick a file. In this tip, I present an example that shows how you can use OpenFileDialog in VB.NET.
-->Definition
Gets or sets a value indicating whether the dialog box allows multiple files to be selected.
Property Value
true if the dialog box allows multiple files to be selected together or concurrently; otherwise, false. The default value is false.
Examples
The following code example allows the user to select a number of images and display them in PictureBox controls on a Form. It demonstrates initializing an OpenFileDialog, setting the Title and Filter properties, and allowing the user to select multiple files by setting the Multiselect property to true. This code example assumes that your form already has an OpenFileDialog control named openFileDialog1, a Button named SelectFileButton, and a FlowLayoutPanel named flowLayoutPanel1.
Remarks
Use the FileNames property to access the full list of selected file names.
Applies to
See also
- FileNamesFileNamesFileNamesFileNames
- FilterFilterFilterFilter
C# File Open Dialog Example
-->The System.Windows.Forms.OpenFileDialog component opens the Windows dialog box for browsing and selecting files. To open and read the selected files, you can use the OpenFileDialog.OpenFile method, or create an instance of the System.IO.StreamReader class. The following examples show both approaches.
In .NET Framework, to get or set the FileName property requires a privilege level granted by the System.Security.Permissions.FileIOPermission class. The examples run a FileIOPermission permission check, and can throw an exception due to insufficient privileges if run in a partial-trust context. For more information, see Code access security basics.
You can build and run these examples as .NET Framework apps from the C# or Visual Basic command line. For more information, see Command-line building with csc.exe or Build from the command line.
Starting with .NET Core 3.0, you can also build and run the examples as Windows .NET Core apps from a folder that has a .NET Core Windows Forms <folder name>.csproj project file.
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Example: Read a file as a stream with StreamReader
Openfiledialog Multiple Files C Tutorial
The following example uses the Windows Forms Button control's Click event handler to open the OpenFileDialog with the ShowDialog method. After the user chooses a file and selects OK, an instance of the StreamReader class reads the file and displays its contents in the form's text box. For more information about reading from file streams, see FileStream.BeginRead and FileStream.Read.
Example: Open a file from a filtered selection with OpenFile
The following example uses the Button control's Click event handler to open the OpenFileDialog with a filter that shows only text files. After the user chooses a text file and selects OK, the OpenFile method is used to open the file in Notepad.
