之前和之后搜索字符串和读取字符 [英] Search string and read chracters after and before

问题描述

以下代码在文件中查找指定的字符串（server =）

The following code finds the specified strings (server=") in a file

atic void Main(string[] args)
        {

            string fName = @"C:\Temp\MyFile";

            StreamReader testTxt = new StreamReader(fName);

            string allRead = testTxt.ReadToEnd();

            testTxt.Close(); 

            string regMatch = "server=";
           
           

            if (Regex.IsMatch(allRead,regMatch))

            {

                Console.WriteLine("found\n");
            


        }

            else

         {

                Console.WriteLine("not found\n");

            }

       The actual string in the file looks like server="HostName"
Since I found the server=" 
how do I read the next characters until I run into (")?
many thanks


        }

我尝试过：



我一直在googl但没有运气

What I have tried:

I have been googl this but no luck

推荐答案

如果您使用Match对象：

If you use the Match object:

string regMatch = "server=";
Match m = Regex.Match(allRead, regMatch);
if (m.Success)
    {

然后您可以使用其属性告诉您它的位置：

Then you can use its properties to tell you where it was found:

string regMatch = "server=";
Match m = Regex.Match(allRead, regMatch);
if (m.Success)
    {
    int startOfMatch = m.Index;
    int lengthOfMatch = m.Length;
    char justBefore = allRead[startOfMatch - 1];
    char justAfter = allRead[startOfMatch + lengthOfMatch];
    }

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