Merge many text files into single text file using C#?

I want to merge all of the tab-delimited text files in a directory into one giant text file. The files don't have headers and the columns in all of the files are all aligned properly with each other so let's assume we don't have to worry about formatting consistency issues.

I just have to stitch/join/merge all of the files together in no particular order.

Here's my code that works:

   string[] stringArray = Directory.GetFiles(@"C:\MergeFileName", "*.txt"); 
     System.Text.StringBuilder stringBuilder = new System.Text.StringBuilder(); 
     for (int i = 0; i <= stringArray.Count(); i++) 
    { 
        stringBuilder.Append(System.IO.File.ReadAllText(stringArray[i])); 
    } 
     string bulidOutput = stringBuilder.ToString(); 
     string newFilePath = @"C:\NewMergeFileName.txt"; 
    System.IO.File.WriteAllText(newFilePath, bulidOutput);

is there any other way which is better/faster/more concise doing this?

Updated on 16-Oct-2013

using (var bulidOutput = File.Create("bulidOutput"))
{
foreach (var file in new[] { "firstFile", "secondFile" })
{
using (var input = File.OpenRead(file))
{
input.CopyTo(bulidOutput);
}
}
}

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Merge many text files into single text file using C#?

Lady Bird Johnson

1 Answers

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