下面的示例将文件复制到指定路径,不允许改写同名的目标文件。using System; using System.IO;class Test { public static void Main() { string path = @"c:\temp\MyTest.txt"; string path2 = path + "temp"; try { 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 fail. File.Copy(path, path2); Console.WriteLine("The second Copy operation succeeded, which was not expected."); } catch (Exception e) { Console.WriteLine("Double copying is not allowed, as expected."); Console.WriteLine(e.ToString()); } } }
using System.IO;class Test
{
public static void Main()
{
string path = @"c:\temp\MyTest.txt";
string path2 = path + "temp"; try
{
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 fail.
File.Copy(path, path2);
Console.WriteLine("The second Copy operation succeeded, which was not expected.");
} catch (Exception e)
{
Console.WriteLine("Double copying is not allowed, as expected.");
Console.WriteLine(e.ToString());
}
}
}