lrey lrey - 3 months ago 43
C# Question

Redirect Console.WriteLine() output to string

I need to take

Console.WriteLine()
output, and append to a string. I cannot change the Main method to simply append to a string instead of writing to console - I need a method to read all written lines from the console and append them to a string.

Currently, I have been using a
FileStream
and redirecting console output into a text file, and then reading from that.

var fs = new FileStream("dataOut.txt", FileMode.Create);
var sw = new StreamWriter(fs);
Console.SetOut(sw);
Console.SetError(sw);


And then
Console.WriteLine("whatever")
writes to the text file. However, I would like to do this without going back and forth from a text file.

Is something like this possible? I realize that the example below does not.

string outString = "";
Console.SetOut(outString);
Console.SetError(outString);

Answer

Use a StringWriter:

var sw = new StringWriter();
Console.SetOut(sw);
Console.SetError(sw);
string result = sw.ToString();
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