需要通过P/Invoke调用Shell API来实现。
VB.NET的代码：
Module Module1
Sub Main()
Console.WriteLine(DeleteToRecycleBin("C:\A"))
End Sub
Function DeleteToRecycleBin(ByVal path As String) As Integer
Dim pm As New SHFILEOPSTRUCT
With pm
.wFunc = Convert.ToUInt32(FO_DELETE)
.pFrom = path & Chr(0)
.pTo = Nothing
.fFlags = Convert.ToUInt16(FOF_ALLOWUNDO Or FOF_NOCONFIRMATION)
End With
Return SHFileOperation(pm)
End Function
Public Const FO_DELETE As Integer = &H3
Public Const FOF_NOCONFIRMATION As Short = &H10
Public Const FOF_ALLOWUNDO As Short = &H40
Declare Unicode Function SHFileOperation Lib "shell32.dll" (<In, Out()> ByVal sfo As SHFILEOPSTRUCT) As Int32
1<structlayout(layoutkind.sequential, charset:="CharSet.Ansi)"> _
2Public Class SHFILEOPSTRUCT
3Public hwnd As IntPtr
4Public wFunc As UInt32
5Public pFrom As String
6Public pTo As String
7Public fFlags As UInt16
8Public fAnyOperationsAborted As Int32
9Public hNameMappings As IntPtr
10Public lpszProgressTitle As String
11End Class
12End Module
13
14调用：DeleteToRecycleBin("C:\A")
15
16C#代码：
17private const int FO_DELETE = 0x3;
18private const ushort FOF_NOCONFIRMATION = 0x10;
19private const ushort FOF_ALLOWUNDO = 0x40;
20
21[DllImport("shell32.dll", SetLastError=true, CharSet=CharSet.Unicode)]
22private static extern int SHFileOperation([In,Out] _SHFILEOPSTRUCT str);
23
24[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
25public class _SHFILEOPSTRUCT
26{
27public IntPtr hwnd;
28public UInt32 wFunc;
29public string pFrom;
30public string pTo;
31public UInt16 fFlags;
32public Int32 fAnyOperationsAborted;
33public IntPtr hNameMappings;
34public string lpszProgressTitle;
35}
36
37public static int Delete(string path)
38{
39_SHFILEOPSTRUCT pm = new _SHFILEOPSTRUCT();
40pm.wFunc = FO_DELETE;
41pm.pFrom = path + '\0';
42pm.pTo = null;
43pm.fFlags = FOF_ALLOWUNDO ¦ FOF_NOCONFIRMATION;
44return SHFileOperation(pm);
45}
46调用：Class1.Delete("C:\\\temp.txt");
47
48注：返回值为0表示调用成功，非0表示调用失败。
49需要引用System.Runtime.InteropServices命名空间。
50
51主题词：回收站，删除文件，P/Invoke，SHFileOperation</structlayout(layoutkind.sequential,>