how to read multi lines in text file in c#?

Question

i like to read check the text has multi line or single line and then i am going to read that multi lines and convert into single line how can i do this?

Answer 1

You really do not need to check as File.ReadAllLines() will always return a string array regardless of the number of lines. You can leverage that behavior and simply join the returned array with your separator of choice.

string singleLine = string.Join(" ", File.ReadAllLines("filepath"));

Answer 2

string text = String.Empty;
if(textbox.Text.Contains(Environment.NewLine))
{
    //textbox contains a new line, replace new lines with spaces
    text = textbox.Text.Replace(Environment.NewLine, " ");
}
else
{
    //single line - simply assign to variable
    text = textbox.Text;
}

Answer 3

try something like that (depends on how you treat "lines"):

System.IO.File.ReadAllText(path).Replace("\n\r", "");

Answer 4

This will read all the lines from a text file and join them into one string with ; as a separator:

string[] lines = File.ReadAllLines("myfile.txt");
string myLine = String.Join(";", lines);