Wpf应用程序来计算特殊字符 [英] Wpf app to count special characters

问题描述

我想创建一个WPF应用程序，它将通过 OpenFiledialoug 计算text.txt文件中的特殊字符并显示在文本框中...

问题是我我正面临一个例外：

i want to create a WPF app which will count the special characters from the text.txt file by OpenFiledialoug and display in textbox ...
The issue is i am facing an exception on the line :

var subRegex = Regex.Matches(file, item.ToString());

System.ArgumentException: 'parsing "\" - Illegal \ at end of pattern.'

我尝试过：

What I have tried:

private void OpenButon_Click(object sender, RoutedEventArgs e)
       {
           OpenFileDialog openFile = new OpenFileDialog();

           if (openFile.ShowDialog() == true)
           {
               string filepath = openFile.FileName;

               var regexString = @"[{(-_!@#$%^&*+<>,./\\?|':;~)}]";

               var file = filepath;
               var rex = new Regex(regexString, RegexOptions.IgnoreCase);
               var results = rex.Matches(file);
               foreach(var item in results)
               {
                   var subRegex = Regex.Matches(file, item.ToString());
                   textbox.Text += "No of Character:" + item + " appearance: " + subRegex.Count;
               }
           }
       }

推荐答案

％^& * +< ;>，。/ \\？|'：;〜）}];

var file = filepath;
var rex = new Regex（regexString，RegexOptions.IgnoreCase） ;
var results = rex.Matches（file）;
foreach（结果中的var项）
{
var subRegex = Regex.Matches（file，item.ToString（）） ;
textbox.Text + =No of Character：+ item +appearance：+ subRegex.Count;
}
}
}

%^&*+<>,./\\?|':;~)}]"; var file = filepath; var rex = new Regex(regexString, RegexOptions.IgnoreCase); var results = rex.Matches(file); foreach(var item in results) { var subRegex = Regex.Matches(file, item.ToString()); textbox.Text += "No of Character:" + item + " appearance: " + subRegex.Count; } } }

这看起来很像昨天在不同的用户ID下发布的问题：计算C＃WPF中文本文件中的特殊字符 [ ^ ]。



如果您是同一个人，请关闭重复的用户帐户。如果你只是朋友那么聚在一起互相帮助。

This looks suspiciously like the questions posted yesterday under a different userid: Count special characters from text file in C# WPF[^].

If you are the same person then please close the duplicate user account. If you are just friends then get together and help each other.

运行时是正确的（当然），因为 Regex.Matches（String，String） [ ^ ]期望正则表达式模式作为第二个参数，并且您没有传递模式。



请注意，您没有在文件中搜索特殊字符，而是在文件的路径中搜索它们。



我强烈建议你阅读 .NET 正则表达式的教程。

The runtime is correct (of course), since the Regex.Matches(String, String)[^] expects a regex pattern as second parameter and you are not passing a pattern.

Note you are not searching for special characters inside the file, you are seraching for them inside the file's path.

I strongly advice you reading a tutorial on .NET regular expressions.

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