FileInfo.Replace 方法

参考

定义

命名空间:: System.IO

程序集:: System.IO.FileSystem.dll

程序集:: System.Runtime.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

重要

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将指定文件的内容替换为当前 FileInfo 对象描述的文件，删除原始文件并创建已替换文件的备份。

重载

Replace(String, String)	将指定文件的内容替换为当前 FileInfo 对象描述的文件，删除原始文件并创建已替换文件的备份。
Replace(String, String, Boolean)	将指定文件的内容替换为当前 FileInfo 对象描述的文件、删除原始文件以及创建已替换文件的备份。还指定是否忽略合并错误。

注解

如果需要将文件快速替换为当前 FileInfo 对象描述的文件的内容，请使用 Replace 方法。

Replace(String, String)

Source:: FileInfo.cs

Source:: FileInfo.cs

Source:: FileInfo.cs

将指定文件的内容替换为当前 FileInfo 对象描述的文件，删除原始文件并创建已替换文件的备份。

public:
 System::IO::FileInfo ^ Replace(System::String ^ destinationFileName, System::String ^ destinationBackupFileName);

public System.IO.FileInfo Replace (string destinationFileName, string? destinationBackupFileName);

public System.IO.FileInfo Replace (string destinationFileName, string destinationBackupFileName);

[System.Runtime.InteropServices.ComVisible(false)]
public System.IO.FileInfo Replace (string destinationFileName, string destinationBackupFileName);

member this.Replace : string * string -> System.IO.FileInfo

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.Replace : string * string -> System.IO.FileInfo

Public Function Replace (destinationFileName As String, destinationBackupFileName As String) As FileInfo

参数

destinationFileName: String

要替换为当前文件的文件的名称。

destinationBackupFileName: String

创建由 destinationFileName 参数描述的文件的备份的文件的名称。

FileInfo

一个 FileInfo 对象，该对象封装 destinationFileName 参数描述的文件的相关信息。

属性: ComVisibleAttribute

例外

ArgumentException

destinationFileName 参数描述的路径不是法律形式。

-或-

destinationBackupFileName 参数描述的路径不是法律形式。

ArgumentNullException

destinationFileName 参数 null。

FileNotFoundException

找不到当前 FileInfo 对象描述的文件。

-或-

找不到 destinationFileName 参数描述的文件。

PlatformNotSupportedException

当前操作系统未Microsoft Windows NT 或更高版本。

示例

以下示例使用 Replace 方法将文件替换为另一个文件，并创建已替换文件的备份。


using namespace System;
using namespace System::IO;


// Move a file into another file, delete the original,
// and create a backup of the replaced file.
void ReplaceFile(String^ fileToMoveAndDelete,
                 String^ fileToReplace, String^ backupOfFileToReplace)
{
    // Create a new FileInfo object.
    FileInfo^ fInfo = gcnew FileInfo(fileToMoveAndDelete);

    // replace the file.
    fInfo->Replace(fileToReplace, backupOfFileToReplace, false);
}


int main()
{
    try
    {
        // originalFile and fileToReplace must contain 
        // the path to files that already exist in the  
        // file system. backUpOfFileToReplace is created 
        // during the execution of the Replace method.

        String^ originalFile = "test.xml";
        String^ fileToReplace = "test2.xml";
        String^ backUpOfFileToReplace = "test2.xml.bak";

        if (File::Exists(originalFile) && (File::Exists(fileToReplace)))
        {
            Console::WriteLine("Move the contents of {0} into {1}, " +
                "delete {0}, and create a backup of {1}",
                originalFile, fileToReplace);

            // Replace the file.
            ReplaceFile(originalFile, fileToReplace,
                backUpOfFileToReplace);
            Console::WriteLine("Done");
        }
        else
        {
            Console::WriteLine("Either the file {0} or {1} doesn't " +
                "exist.", originalFile, fileToReplace);
        }
    }
    catch (IOException^ ex)
    {
        Console::WriteLine(ex->Message);
    }
}


//This code produces output similar to the following; 
//results may vary based on the computer/file structure/etc.:
//
//Move the contents of c:\test1.xml into c:\test2.xml, delete c:\test1.xml, 
//and create a backup of c:\test2.xml
//Done

using System;
using System.IO;

namespace FileSystemExample
{
    class FileExample
    {
        public static void Main()
        {
            try
            {
                // originalFile and fileToReplace must contain the path to files that already exist in the
                // file system. backUpOfFileToReplace is created during the execution of the Replace method.

                string originalFile  = "test.txt";
                string fileToReplace = "test2.txt";
                string backUpOfFileToReplace = "test2.txt.bak";

                if (File.Exists(originalFile) && (File.Exists(fileToReplace)))
                {
                    Console.WriteLine("Move the contents of " + originalFile + " into " + fileToReplace + ", delete "
                        + originalFile + ", and create a backup of " + fileToReplace + ".");

                    // Replace the file.
                    ReplaceFile(originalFile, fileToReplace, backUpOfFileToReplace);

                    Console.WriteLine("Done");
                }
                else
                {
                    Console.WriteLine("Either the file {0} or {1} doesn't " + "exist.", originalFile, fileToReplace);
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
            }

            Console.ReadLine();
        }

        // Move a file into another file, delete the original, and create a backup of the replaced file.
        public static void ReplaceFile(string fileToMoveAndDelete, string fileToReplace, string backupOfFileToReplace)
        {
            // Create a new FileInfo object.
            FileInfo fInfo = new FileInfo(fileToMoveAndDelete);

            // replace the file.
            fInfo.Replace(fileToReplace, backupOfFileToReplace, false);
        }
    }
}
//Move the contents of test.txt into test2.txt, delete test.txt, and
//create a backup of test2.txt.
//Done

Imports System.IO

Module FileExample

    Sub Main()
        Try
            ' originalFile and fileToReplace must contain the path to files that already exist in the  
            ' file system. backUpOfFileToReplace is created during the execution of the Replace method.

            Dim originalFile As String = "test.xml"
            Dim fileToReplace As String = "test2.xml"
            Dim backUpOfFileToReplace As String = "test2.xml.bak"

            If (File.Exists(originalFile) And (File.Exists(fileToReplace))) Then
                Console.WriteLine("Move the contents of " + originalFile + " into " + fileToReplace + ", delete " + originalFile + ", and create a backup of " + fileToReplace + ".")

                ' Replace the file.
                ReplaceFile(originalFile, fileToReplace, backUpOfFileToReplace)

                Console.WriteLine("Done")

            Else
                Console.WriteLine("Either the file {0} or {1} doesn't " + "exist.", originalFile, fileToReplace)
            End If
        Catch e As Exception
            Console.WriteLine(e.Message)
        End Try

        Console.ReadLine()

    End Sub

    ' Move a file into another file, delete the original, and create a backup of the replaced file.
    Sub ReplaceFile(ByVal fileToMoveAndDelete As String, ByVal fileToReplace As String, ByVal backupOfFileToReplace As String)
        ' Create a new FileInfo object.
        Dim fInfo As New FileInfo(fileToMoveAndDelete)

        ' Replace the file.
        fInfo.Replace(fileToReplace, backupOfFileToReplace, False)

    End Sub
End Module

' Move the contents of test.txt into test2.txt, delete test.txt, and 
' create a backup of test2.txt.
' Done

注解

Replace 方法将指定文件的内容替换为当前 FileInfo 对象描述的文件的内容。它还会创建已替换的文件的备份。最后，它返回一个新的 FileInfo 对象，该对象描述被覆盖的文件。

如果不想创建要替换的文件的备份，请将 null 传递给 destinationBackupFileName 参数。

适用于

Replace(String, String, Boolean)

Source:: FileInfo.cs

Source:: FileInfo.cs

Source:: FileInfo.cs

将指定文件的内容替换为当前 FileInfo 对象描述的文件、删除原始文件以及创建已替换文件的备份。还指定是否忽略合并错误。

public:
 System::IO::FileInfo ^ Replace(System::String ^ destinationFileName, System::String ^ destinationBackupFileName, bool ignoreMetadataErrors);

public System.IO.FileInfo Replace (string destinationFileName, string? destinationBackupFileName, bool ignoreMetadataErrors);

public System.IO.FileInfo Replace (string destinationFileName, string destinationBackupFileName, bool ignoreMetadataErrors);

[System.Runtime.InteropServices.ComVisible(false)]
public System.IO.FileInfo Replace (string destinationFileName, string destinationBackupFileName, bool ignoreMetadataErrors);

member this.Replace : string * string * bool -> System.IO.FileInfo

[<System.Runtime.InteropServices.ComVisible(false)>]
member this.Replace : string * string * bool -> System.IO.FileInfo

Public Function Replace (destinationFileName As String, destinationBackupFileName As String, ignoreMetadataErrors As Boolean) As FileInfo

参数

destinationFileName: String