CODEWITHSUNDEEP
c#text-filesstreamreader
dezkev
dezkev

Reputation: 599

Using Streamreader in C# merge multiple lines into a single line

I have searched SO but did not find anything that specifically addresses this issue: So here goes - I have a text file where the paragraphs have lines of text ending with a "return". So it ends up on separate lines - I would like to merge these multiple lines into a single line. I am using Streamreader in C# ( VS 2010).

Example:

GE1:1

xxxxxxxxxxxxxxxxxxxxx

yyyyyyyyyyyyyy.

hhhhhhhhhhhhh.

GE1:2

zzzzzzzzzzz

kkkkkkkkkkkkkkkkkkkkkkk

and so on....

As you can see in above example some paragraphs have 3 lines and some have two.It varies. There are thousands of these paras in the text file.

Basically I would like to have my variable "templine" contain the following: (which will be used for further processing). 

var templine = "xxxxxxxxxxxxxxxxxxxxx yyyyyyyyyyyyyy. hhhhhhhhhhhhh."

Code:

     using (StreamReader sr = new StreamReader(@"C:\Test.txt"))
        using(StreamWriter sw = new StreamWriter(@"C:\Test2.txt"))
        {
            StringBuilder sb    = new StringBuilder ( );


            while (!sr.EndOfStream)
            {
                    string templine = sr.ReadLine();  /// further processing code not relevant.

UPDATE: What i need is a way to detect if a paragraph has 3 lines or two. I know how to remove the Newline character etc.. just cant work out how to know when the paragraph ends.

Upvotes: 0

Views: 6453

Answers (3)

AgentFire
AgentFire

Reputation: 9790

You could use a regular expressions.

Regex parser = new Regex(@"GE\d*\:\d*\r\n(?<lines>(.*?\r\n){2,3})",
    RegexOptions.Singleline);

and then just get all you need:

string[] paragraphs = parser.Matches.Cast<Match>().Select(T =>
    Regex.Replace(T.Groups["lines"].Value, @"\t|\n|\r", string.Empty)).ToArray();

(Havn't tested yet.)

Upvotes: 0

Pranay Rana
Pranay Rana

Reputation: 176936

You can remove new line char from the string like this 

string replacement = Regex.Replace(templine  , @"\t|\n|\r", "");

or 

templine  = templine.Replace("\n", String.Empty);
templine  = templine.Replace("\r", String.Empty);
templine = templine.Replace("\t", String.Empty);

to make single line out of multiple lines

Upvotes: 0

Matt Searles
Matt Searles

Reputation: 2765

To bring all text into a single string

var templine = File.ReadAllText(@"c:\temp.txt").Replace(Environment.NewLine, " ");

That .Replace is because it looks like you want your new lines to be replaced with spaces.

If you want to break it up into 2 or 3 line paragraphs, you'll need to specify for us what the delimiter is.

Upvotes: 1

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