C# 判断文件夹下是否存在

你可以使用 C# 中的 Directory 类来判断文件夹是否存在。下面是示例代码：

string folderPath = @"C:\Users\Username\Documents\MyFolder";

if (Directory.Exists(folderPath))
{
    Console.WriteLine("Folder exists.");
}
else
{
    Console.WriteLine("Folder does not exist.");
}

你只需要将 `folderPath` 变量替换为你想要检查的文件夹的路径即可。

相关问题

C# 判断文件夹下是否存在文件

C is a programming language that was developed in the early 1970s by Dennis Ritchie at Bell Labs. It is a general-purpose, procedural programming language that is widely used in the development of operating systems, embedded systems, and other high-performance applications.

C is a low-level language, meaning that it provides direct access to the computer's hardware and memory, which makes it a powerful tool for systems programming. It is also a compiled language, which means that the code written in C is translated into machine code before it can be executed.

Some of the key features of C include its simplicity, efficiency, and portability. It has a relatively small set of keywords and constructs, which makes it easy to learn and use. It also has excellent performance and is able to run on a wide range of platforms, from small embedded devices to large mainframe computers.

C has had a huge impact on the field of computer science and has influenced many other programming languages, including C++, Java, and Python. It is still widely used today, particularly in the development of operating systems, device drivers, and other low-level software.

C#判断文件夹是否存在

在C#中，可以使用`Directory`类来判断文件夹是否存在。具体来说，可以使用`Directory.Exists()`方法来判断文件夹是否存在，该方法接受文件夹路径作为参数，返回一个布尔值，表示该文件夹是否存在。

以下是一个示例代码：

using System.IO;

// 判断文件夹是否存在
string folderPath = "C:\\Users\\User\\Documents\\MyFolder";
if (Directory.Exists(folderPath))
{
    Console.WriteLine("文件夹已存在");
}
else
{
    Console.WriteLine("文件夹不存在");
}

在上面的代码中，我们使用`Directory.Exists()`方法来判断指定路径的文件夹是否存在，如果存在则输出“文件夹已存在”，否则输出“文件夹不存在”。