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File Permissions in C#
For File Permission in C#, use the FileIOPermission Class. It controls the ability to access files and folders.
The following are the properties of File Permissions class −
Sr.No. | Methods & Description |
---|---|
1 | AllFiles Gets or sets the permitted access to all files. |
2 | AllLocalFiles Gets or sets the permitted access to all local files. |
The following are the methods of File Permission class −
Sr.No. | Methods & Description |
---|---|
1 | AddPathList(FileIOPermissionAccess, String) This method adds access for the specified file or directory to the existing state of the permission |
2 | Copy() This method creates and returns an identical copy of the current permission. |
3 | GetType() The GetType() method gets the type of the current instance. |
4 | ToXml() Creates an XML encoding of the permission and its current state. |
Let us see an example to work wuth FileIOPermission Class in C#. Here, the Demand() method forces a SecurityException at run time if all callers higher in the call stack have not been granted the permission specified by the current instance −
Example
using System; using System.IO; using System.Security.Permissions; using System.Security; public class Demo { public static void Main() { FileIOPermission file= new FileIOPermission(PermissionState.None); file.AllLocalFiles = FileIOPermissionAccess.Read; try { Console.WriteLine("Demands the permission to determine whether the application has permission to read the files"); file.Demand(); } catch (SecurityException s) { Console.WriteLine(s.Message); } } }
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