c# - 从文件名中删除特殊字符

Question

我需要从文件中删除特殊字符，我基于此 example 尝试了以下代码，它产生的错误很少。我需要此代码才能为基于 asp.net webform 的应用程序工作。

using System;
using System.Linq;
using System.Text.RegularExpressions;

public class Test {
    public static void Main() {
        // your code goes here

        var file_name = GetValidFileName("this is)file<ame.txt");
        Console.WriteLine(file_name);
        private static string GetValidFileName(string fileName) {
            // remove any invalid character from the filename.
            return Regex.Replace(fileName.Trim(), "[^A-Za-z0-9_. ]+", "");
        }
    }
}

输出示例代码 ideone.com

Answer 1

您已将 private static string GetValidFileName 放入 public static void Main() 并且在 C# 中是不允许的。只需简单地更改代码如下即可:

using System;
using System.Linq;
using System.Text.RegularExpressions;

public class Test {
    public static void Main() {
    // your code goes here

    var file_name = GetValidFileName("this is)file<ame.txt");
    Console.WriteLine(GetValidFileName(file_name));

    }
    private static string GetValidFileName(string fileName) {
        // remove any invalid character from the filename.
        String ret = Regex.Replace(fileName.Trim(), "[^A-Za-z0-9_. ]+", "")
        return ret.Replace(" ", String.Empty);
    }
}