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()); } } }
trCsvfileCopypath 可以带文件名,就会提示覆盖文件与否
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());
}
}
}
难道我visual studio安装的时候不是管理者的缘故吗。但是我现在已经把它改成管理者了啊。
怎么还会是这样的。