FileInfo.Delete 方法
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
永久删除文件。
public:
override void Delete();public override void Delete ();override this.Delete : unit -> unitPublic Overrides Sub Delete ()例外
目标文件打开或在运行 Microsoft Windows NT 的计算机上进行内存映射。
- 或 -
在文件中存在开放句柄，并且操作系统是 Windows XP 或更早的版本。 枚举目录和文件可能会导致此开放句柄出现。 有关详细信息，请参阅如何：枚举目录和文件。
调用方没有所要求的权限。
路径是一个目录。
示例
下面的示例演示 Delete 方法。
using namespace System;
using namespace System::IO;
int main()
{
String^ path = "c:\\MyTest.txt";
FileInfo^ fi1 = gcnew FileInfo( path );
try
{
StreamWriter^ sw = fi1->CreateText();
if ( sw )
delete (IDisposable^)sw;
String^ path2 = String::Concat( path, "temp" );
FileInfo^ fi2 = gcnew FileInfo( path2 );
//Ensure that the target does not exist.
fi2->Delete();
//Copy the file.
fi1->CopyTo( path2 );
Console::WriteLine( "{0} was copied to {1}.", path, path2 );
//Delete the newly created file.
fi2->Delete();
Console::WriteLine( "{0} was successfully deleted.", path2 );
}
catch ( Exception^ e )
{
Console::WriteLine( "The process failed: {0}", e );
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//c:\MyTest.txt was copied to c:\MyTest.txttemp.
//c:\MyTest.txttemp was successfully deleted.
using System;
using System.IO;
class Test
{
public static void Main()
{
string path = @"c:\MyTest.txt";
FileInfo fi1 = new FileInfo(path);
try
{
using (StreamWriter sw = fi1.CreateText()) {}
string path2 = path + "temp";
FileInfo fi2 = new FileInfo(path2);
//Ensure that the target does not exist.
fi2.Delete();
//Copy the file.
fi1.CopyTo(path2);
Console.WriteLine("{0} was copied to {1}.", path, path2);
//Delete the newly created file.
fi2.Delete();
Console.WriteLine("{0} was successfully deleted.", path2);
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//c:\MyTest.txt was copied to c:\MyTest.txttemp.
//c:\MyTest.txttemp was successfully deleted.
Imports System.IO
Imports System.Text
Public Class Test
Public Shared Sub Main()
Dim path As String = "c:\MyTest.txt"
Dim fi As FileInfo = New FileInfo(path)
Try
Dim sw As StreamWriter = fi.CreateText()
sw.Close()
Dim path2 As String = path + "temp"
Dim fi2 As FileInfo = New FileInfo(path2)
'Ensure that the target does not exist.
fi2.Delete()
'Copy the file.
fi.CopyTo(path2)
Console.WriteLine("{0} was copied to {1}.", path, path2)
'Delete the newly created file.
fi2.Delete()
Console.WriteLine("{0} was successfully deleted.", path2)
Catch e As Exception
Console.WriteLine("The process failed: {0}", e.ToString())
End Try
End Sub
End Class
'This code produces output similar to the following;
'results may vary based on the computer/file structure/etc.:
'
'c:\MyTest.txt was copied to c:\MyTest.txttemp.
'c:\MyTest.txttemp was successfully deleted.
以下示例创建、关闭和删除文件。
using namespace System;
using namespace System::IO;
int main()
{
// Create a reference to a file.
FileInfo^ fi = gcnew FileInfo( "temp.txt" );
// Actually create the file.
FileStream^ fs = fi->Create();
// Modify the file as required, and then close the file.
fs->Close();
// Delete the file.
fi->Delete();
}
using System;
using System.IO;
public class DeleteTest
{
public static void Main()
{
// Create a reference to a file.
FileInfo fi = new FileInfo("temp.txt");
// Actually create the file.
FileStream fs = fi.Create();
// Modify the file as required, and then close the file.
fs.Close();
// Delete the file.
fi.Delete();
}
}
Imports System.IO
Public Class DeleteTest
Public Shared Sub Main()
' Create a reference to a file.
Dim fi As New FileInfo("temp.txt")
' Actually create the file.
Dim fs As FileStream = fi.Create()
' Modify the file as required, and then close the file.
fs.Close()
' Delete the file.
fi.Delete()
End Sub
End Class
注解
如果文件不存在，此方法不执行任何操作。
