Question

我有一个文本文件，其中包含以下链接列表：

<A title=Accept href="https://www.google.com/url?q=https%3A%2F%2Fregister.eragenx.com%2Freferral%3Freferrer%3Demail%26invitationToken%3D1f7ae07e4cb1ed96a7fc5f6de10376d9%26email%3Dlovessoumi.tra123456789soumit90%2540gmail.com&amp;sa=D&amp;sntz=1&amp;usg=AFQjCNGdIeh6LFs4H5TvysbSV7DjUk2Tuw" target=_blank>Sign Up Now For Free.</A>

使用我的程序，点击按钮时我想编辑每行文件，如：

https://register.eragenx.com/referral?referrer=email&invitationToken=fd78d9fdf6281e033b389cb14e118f85&email=lovesleeping1234567.8sleepin.g97%40gmail.com

这就是我正在尝试的，但它似乎有效，我做错了什么？

public void editline()
        {


            string[] lines = File.ReadAllLines("link.txt");

            foreach (var line in lines)
            {
                line.Substring(51,171);
                line.Replace("%3A", ":");
                line.Replace("%2F","/");
                line.Replace("%3F","?");
                line.Replace("%3D" , "=");
                line.Replace("%26","&");

            }

            File.WriteAllLines("output.txt",lines);




        }

我也试过这个：

public void editline()
        {



            string[] lines = File.ReadAllLines("link.txt");



            foreach (var line in lines)
            {

               HttpUtility.UrlDecode(line.Substring(51, 171));


            }


            File.WriteAllLines("output.txt", lines);
}

和此：

public void editline()
        {


            string parsedLine = null;
            string[] lines = File.ReadAllLines("link.txt");



            foreach (var line in lines)
            {


                parsedLine = line.Substring(51, 171);
                parsedLine = line.Replace("%3A", ":");
                parsedLine = line.Replace("%2F", "/");
                parsedLine = line.Replace("%3F", "?");
                parsedLine = line.Replace("%3D", "=");
                parsedLine = line.Replace("%26", "&");

            }


            File.WriteAllLines("output.txt", lines);
}

但输出与link.txt中的链接相同，该方法在output.txt中没有变化

请帮助

Answer 1

line没有变化的原因是因为您没有存储substring和replace函数的结果。

应该是这样的：

string parsedLine= null;

foreach (var line in lines)
{
  parsedLine = line.Substring(51,171);
  parsedLine = parsedLine.Replace("%3A", ":");
  parsedLine = ...
}

//use parsedLine here...

Answer 2

您应该使用此处的HttpServerUtility.UrlDecode()方法： http://msdn.microsoft.com/en-us/library/6196h3wt(v=vs.110).aspx

Answer 3

public void editline()
    {
        string[] lines = File.ReadAllLines("link.txt");

        foreach (var line in lines)
        {
           line = line.Substring(51,171);
           line = line.Replace("%3A", ":");
          line =  line.Replace("%2F","/");
           line = line.Replace("%3F","?");
           line = line.Replace("%3D" , "=");
           line = line.Replace("%26","&");

        }

        File.WriteAllLines("output.txt",lines);
    }

查看替换方法。它返回修改后的字符串，不会修改您传入的字符串。

从文本文件中读取文件并以编程方式编辑每一行并将其输出到另一个txt文件中

3 个答案: