reading the next line in a text file in C#

Question

I need to get the next line data from a text file. For example a text file abc contains:

Test Results : Fail
Error Code : 2000-0333

I need to search for keyword "Test Results : Fail" and if it exists, the data "2000-0333" should be stored in a variable.

Here's what I have done so far:

   List<string> filecontents = File.ReadAllLines("abc.txt").ToList<string();
   for (int i = 0; i < filecontents.Count; i++)
   {
       if (filecontents[i].Contains("Test Results : Fail"))
       {                          
           //need to get the data here
       }
   }

Could I please get solution to this?? Thank you in advance.

Answer 1

Your next line, will be in filecontents[i + 1]

List<string> filecontents = File.ReadAllLines("abc.txt").ToList<string();
for (int i = 0; i < filecontents.Count; i++)
   {
       if (filecontents[i].Contains("Test Results : Fail"))
       {                          
           string error = filecontents[i + 1];
       }
   }

Take care, if the last string is of the file is "Test Results : Fail", when try to get filecontents[i + 1] will throw an exception.

To get the 2000-0333, you should split the string error by the ":"

string errorNumber = filecontents[i + 1].Split(':')[1]

But, if there is no ':' it will throw an exception. Be aware of that.

You can .Trim() the errorNumber, to know for sure there is no blank space in the string.

Answer 2

List<string> filecontents = File.ReadAllLines("abc.txt").ToList<string();
for (int i = 0; i < filecontents.Count; i++)
{
    if (filecontents[i].Contains("Test Results : Fail"))
    {                          
       string s = fileContents[i+1].Split(" : ")[1];
    }
}

Answer 3

if(  (from c in filecontents where c.Contains("Test Results : Fail") select filecontents.IndexOf(c)).Any())
{
    int index = (from c in filecontents where c.Contains("Test Results : Fail") select filecontents.IndexOf(c)).SingleOrDefault();
     string error = filecontents[index + 1];
}