FileInfo.Create 方法
创建文件。
**命名空间:**System.IO
**程序集:**mscorlib（在 mscorlib.dll 中）
语法
声明
Public Function Create As FileStream
用法
Dim instance As FileInfo
Dim returnValue As FileStream
returnValue = instance.Create
public FileStream Create ()
public:
FileStream^ Create ()
public FileStream Create ()
public function Create () : FileStream
返回值
新文件。
备注
默认情况下，将向所有用户授予对新文件的完全读/写访问权限。
此方法是由 File.Create 提供的功能的包装。
下表列出了其他典型或相关的 I/O 任务的示例。
若要执行此操作... |
请参见本主题中的示例... |
|---|---|
创建文本文件。 |
|
写入文本文件。 |
|
读取文本文件。 |
|
向文件中追加文本。 |
|
复制文件。 |
|
重命名或移动文件。 |
|
删除文件。 |
|
读取二进制文件。 |
|
写入二进制文件。 |
|
创建目录。 |
示例
下面的示例创建对文件的引用，然后使用 FileInfo.Create() 在磁盘上创建此文件。
Imports System
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 'Main
End Class 'DeleteTest
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();
}
}
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();
}
import System.*;
import System.IO.*;
public class DeleteTest
{
public static void main(String[] args)
{
// 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();
} //main
} //DeleteTest
import System;
import System.IO;
public class DeleteTest {
public static function Main() : void {
// Create a reference to a file.
var fi : FileInfo = new FileInfo("temp.txt");
// Actually create the file.
var fs : FileStream = fi.Create();
// Modify the file as required, and then close the file.
fs.Close();
// Delete the file.
fi.Delete();
}
}
DeleteTest.Main();
下面的示例创建一个文件，向其中添加一些文本，然后从此文件中读取。
Imports System
Imports System.IO
Imports System.Text
Public Class Test
Public Shared Sub Main()
Dim path As String = "c:\temp\MyTest.txt"
Dim fi As FileInfo = New FileInfo(path)
' Delete the file if it exists.
If fi.Exists() Then
fi.Delete()
End If
'Create the file.
Dim fs As FileStream = fi.Create()
Dim info As Byte() = New UTF8Encoding(True).GetBytes("This is some text in the file.")
'Add some information to the file.
fs.Write(info, 0, info.Length)
fs.Close()
'Open the stream and read it back.
Dim sr As StreamReader = fi.OpenText()
Do While sr.Peek() >= 0
Console.WriteLine(sr.ReadLine())
Loop
sr.Close()
End Sub
End Class
using System;
using System.IO;
using System.Text;
class Test
{
public static void Main()
{
string path = @"c:\temp\MyTest.txt";
FileInfo fi = new FileInfo(path);
// Delete the file if it exists.
if (fi.Exists)
{
fi.Delete();
}
//Create the file.
using (FileStream fs = fi.Create())
{
Byte[] info =
new UTF8Encoding(true).GetBytes("This is some text in the file.");
//Add some information to the file.
fs.Write(info, 0, info.Length);
}
//Open the stream and read it back.
using (StreamReader sr = fi.OpenText())
{
string s = "";
while ((s = sr.ReadLine()) != null)
{
Console.WriteLine(s);
}
}
}
}
using namespace System;
using namespace System::IO;
using namespace System::Text;
int main()
{
String^ path = "c:\\temp\\MyTest.txt";
FileInfo^ fi = gcnew FileInfo( path );
// Delete the file if it exists.
if ( fi->Exists )
{
fi->Delete();
}
//Create the file.
FileStream^ fs = fi->Create();
try
{
array<Byte>^info = (gcnew UTF8Encoding( true ))->GetBytes( "This is some text in the file." );
//Add some information to the file.
fs->Write( info, 0, info->Length );
}
finally
{
if ( fs )
delete (IDisposable^)fs;
}
//Open the stream and read it back.
StreamReader^ sr = fi->OpenText();
try
{
String^ s = "";
while ( s = sr->ReadLine() )
{
Console::WriteLine( s );
}
}
finally
{
if ( sr )
delete (IDisposable^)sr;
}
}
.NET Framework 安全性
- FileIOPermission 用于读取和写入文件。关联的枚举：FileIOPermissionAccess.Read、FileIOPermissionAccess.Write
平台
Windows 98、Windows 2000 SP4、Windows CE、Windows Millennium Edition、Windows Mobile for Pocket PC、Windows Mobile for Smartphone、Windows Server 2003、Windows XP Media Center Edition、Windows XP Professional x64 Edition、Windows XP SP2、Windows XP Starter Edition
.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。
版本信息
.NET Framework
受以下版本支持：2.0、1.1、1.0
.NET Compact Framework
受以下版本支持：2.0、1.0
请参见
参考
FileInfo 类
FileInfo 成员
System.IO 命名空间