如果创建目录不存在,如何创建目录？

Question

如果目录不存在,我在这里有一段代码会中断:

System.IO.File.WriteAllText(filePath, content);

在一行(或几行)中,是否可以检查导致新文件的目录是否不存在,如果不存在,是否可以在创建新文件之前创建它？

我正在使用.NET 3.5.

Answer 1

To Create

(new FileInfo(filePath)).Directory.Create() Before writing to the file.

....Or, If it exists, then create (else do nothing)

System.IO.FileInfo file = new System.IO.FileInfo(filePath);
file.Directory.Create(); // If the directory already exists, this method does nothing.
System.IO.File.WriteAllText(file.FullName, content);

Answer 2

You can use following code

  DirectoryInfo di = Directory.CreateDirectory(path);

Answer 3

As @hitec said, you have to be sure that you have the right permissions, if you do, you can use this line to ensure the existence of the directory:

Directory.CreateDirectory(Path.GetDirectoryName(filePath))