将文件复制到指定路径[C# 文件操作].doc

将现有文件复制到新文件，不允许改写现有文件。C#public FileInfo CopyTo(string);将现有文件复制到新文件，允许改写现有文件。C#public FileInfo CopyTo(string, bool);C# 将文件复制到指定路径，允许改写同名的目标文件 COPYusing System;using System.IO;class Test public static void Main() string path = c:/temp/MyTest.txt; string path2 = path + temp; try / Create the file and clean up handles. using (FileStream fs = File.Create(path) / Ensure that the target does not exist. File.Delete(path2); / Copy the file. File.Copy(path, path2); Console.WriteLine(0 copied to 1, path, path2); / Try to copy the same file again, which should succeed. File.Copy(path, path2, true); Console.WriteLine(The second Copy operation succeeded, which was expected.); catch Console.WriteLine(Double copy is not allowed, which was not expected.); C# COPY TOusing System;using System.IO;class Test public static void Main() string path = c:/temp/MyTest.txt; string path2 = c:/temp/MyTest.txt + temp; FileInfo fi1 = new FileInfo(path); FileInfo fi2 = new FileInfo(path2); try / Create the file and clean up handles. using (FileStream fs = fi1.Create() /Ensure that the target does not exist. fi2.Delete(); /Copy the file. fi1.CopyTo(path2); Console.WriteLine(0 was copied to 1., path, path2); /Try to copy it again, which should succeed. fi1.CopyTo(path2, true); Console.WriteLine(The second Copy operation succeeded, which is expected.); catch Console.WriteLine(Double copying was not allowed, which is not expected.); 若要执行此操作.请参见本主题中的示例.创建文本文件。向文件写入文本写入文本文件。向文件写入文本读取文本文件。从文件读取文本向文件中追加文本。打开并附加到日志文件File.AppendTextFileInfo.AppendText重命名或移动文件。File.MoveFileInfo.MoveTo删除文件。File.DeleteFileInfo.Delete复制文件。File.CopyFileInfo.CopyTo获取文件大小。FileInfo.Length获取文件属性。File.GetAttributes设置文件属性。File.SetAttributes确定文件是否存在。File.Exists读取二进制文件。对刚创建的数据文件进行读取和写入写入二进制文件。对刚创建的数据文件进行读取和写入检索文件扩展名。Path.GetExtension检索文件的完全限定路径。Path.GetFullPath检索路径中的文件名和扩展名。Path.GetFileName更改文件扩展名。Path.ChangeExtensionProgress 类的使用private void CopyWithProgress(string filenames) / Display the ProgressBar control. pBar1.Visible = true; / Set Minimum to 1 to represent the first file being copied. pBar1.Minimum = 1; / Set Maximum to the total number of files to copy. pBar1.Maximum = filenames.Length; / Set the initial value of the ProgressBar. pBar1.Value = 1; / Set the Step property to a value of 1 to represent each filebeing copied. pBar1.Step = 1; / Loop through all files to copy. for (int x = 1; x = filenames.Length; x+) / Copy the file and increment the