假設文件具有以下屬性:ReadOnly, Hidden, Archived, System
。 如何刪除一個屬性?(例如只讀)如何從文件中刪除單個屬性(例如ReadOnly)?
如果我使用:
Io.File.SetAttributes("File.txt",IO.FileAttributes.Normal)
它會刪除所有的屬性。
假設文件具有以下屬性:ReadOnly, Hidden, Archived, System
。 如何刪除一個屬性?(例如只讀)如何從文件中刪除單個屬性(例如ReadOnly)?
如果我使用:
Io.File.SetAttributes("File.txt",IO.FileAttributes.Normal)
它會刪除所有的屬性。
從MSDN:您可以刪除像任何屬性,這
(但@ SLL的只是只讀的答案是隻是屬性更好)
using System;
using System.IO;
using System.Text;
class Test
{
public static void Main()
{
string path = @"c:\temp\MyTest.txt";
// Create the file if it exists.
if (!File.Exists(path))
{
File.Create(path);
}
FileAttributes attributes = File.GetAttributes(path);
if ((attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
{
// Make the file RW
attributes = RemoveAttribute(attributes, FileAttributes.ReadOnly);
File.SetAttributes(path, attributes);
Console.WriteLine("The {0} file is no longer RO.", path);
}
else
{
// Make the file RO
File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.Hidden);
Console.WriteLine("The {0} file is now RO.", path);
}
}
private static FileAttributes RemoveAttribute(FileAttributes attributes, FileAttributes attributesToRemove)
{
return attributes & ~attributesToRemove;
}
}
Thx很多,這是更多的少,只是我需要:D – Bjqn
回答你的問題在標題關於ReadOnly
屬性:
FileInfo fileInfo = new FileInfo(pathToAFile);
fileInfo.IsReadOnly = false;
要獲得控制權的任何屬性,你依然可以使用File.SetAttributes()
方法。該鏈接還提供了一個示例。
使用此:
private static FileAttributes RemoveAttribute(FileAttributes attributes, FileAttributes attributesToRemove)
在此處閱讀詳細信息:http://msdn.microsoft.com/en-us/library/system.io.file.setattributes.aspx
對於一個在線解決方案(前提是當前用戶具有訪問權限更改上述文件的屬性)這裏是我會怎麼做:
VB.Net
Shell("attrib file.txt -r")
負號表示爲remove
,r
表示只讀。 如果要刪除其他屬性,以及你會怎麼做:
Shell("attrib file.txt -r -s -h -a")
,將刪除只讀,系統文件,隱藏和存檔屬性。
,如果你想給後面這些屬性,這裏是如何:
Shell("attrib file.txt +r +s +h +a")
的順序並不重要。
C#
Process.Start("cmd.exe", "attrib file.txt +r +s +h +a");
參考
/// <summary>
/// Addes the given FileAttributes to the given File.
/// It's possible to combine FileAttributes: FileAttributes.Hidden | FileAttributes.ReadOnly
/// </summary>
public static void AttributesSet(this FileInfo pFile, FileAttributes pAttributes)
{
pFile.Attributes = pFile.Attributes | pAttributes;
pFile.Refresh();
}
/// <summary>
/// Removes the given FileAttributes from the given File.
/// It's possible to combine FileAttributes: FileAttributes.Hidden | FileAttributes.ReadOnly
/// </summary>
public static void AttributesRemove(this FileInfo pFile, FileAttributes pAttributes)
{
pFile.Attributes = pFile.Attributes & ~pAttributes;
pFile.Refresh();
}
/// <summary>
/// Checks the given File on the given Attributes.
/// It's possible to combine FileAttributes: FileAttributes.Hidden | FileAttributes.ReadOnly
/// </summary>
/// <returns>True if any Attribute is set, False if non is set</returns>
public static bool AttributesIsAnySet(this FileInfo pFile, FileAttributes pAttributes)
{
return ((pFile.Attributes & pAttributes) > 0);
}
/// <summary>
/// Checks the given File on the given Attributes.
/// It's possible to combine FileAttributes: FileAttributes.Hidden | FileAttributes.ReadOnly
/// </summary>
/// <returns>True if all Attributes are set, False if any is not set</returns>
public static bool AttributesIsSet(this FileInfo pFile, FileAttributes pAttributes)
{
return (pAttributes == (pFile.Attributes & pAttributes));
}
例子:
private static void Test()
{
var lFileInfo = new FileInfo(@"C:\Neues Textdokument.txt");
lFileInfo.AttributesSet(FileAttributes.Hidden | FileAttributes.ReadOnly);
lFileInfo.AttributesSet(FileAttributes.Temporary);
var lBool1 = lFileInfo.AttributesIsSet(FileAttributes.Hidden);
var lBool2 = lFileInfo.AttributesIsSet(FileAttributes.Temporary);
var lBool3 = lFileInfo.AttributesIsSet(FileAttributes.Encrypted);
var lBool4 = lFileInfo.AttributesIsSet(FileAttributes.ReadOnly | FileAttributes.Temporary);
var lBool5 = lFileInfo.AttributesIsSet(FileAttributes.ReadOnly | FileAttributes.Encrypted);
var lBool6 = lFileInfo.AttributesIsAnySet(FileAttributes.ReadOnly | FileAttributes.Temporary);
var lBool7 = lFileInfo.AttributesIsAnySet(FileAttributes.ReadOnly | FileAttributes.Encrypted);
var lBool8 = lFileInfo.AttributesIsAnySet(FileAttributes.Encrypted);
lFileInfo.AttributesRemove(FileAttributes.Temporary);
lFileInfo.AttributesRemove(FileAttributes.Hidden | FileAttributes.ReadOnly);
}
if ((oFileInfo.Attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
oFileInfo.Attributes ^= FileAttributes.ReadOnly;
讀取當前屬性,掩蓋你需要設置屬性,設置屬性... –