Question

I need to get all *.config files in a directory and its sub-directories containing the string MySettings.xru.

In all those files that are found, on only the line containing the string MySettings.xru I need to replace the text db001 with db002.

So, for example, if I have:

RandomSettings.xru someOtherWords Database=db001 blah, blah, blah...
MySettings.xru Lalala Database=db001 blah, blah, blah...
YourSettings.xru Hey yo Database=db001 blah, blah, blah...

The results should be:

RandomSettings.xru someOtherWords Database=db001 blah, blah, blah...
MySettings.xru Lalala Database=db002 blah, blah, blah...
YourSettings.xru Hey yo Database=db001 blah, blah, blah...

Thanks!

UPDATE: Solved it myself.

Answer 1

Here is my solution:

string[] filePaths = Directory.GetFiles(@"C:\test\", "*.config", SearchOption.AllDirectories);

int counter = 0;
string currentFile = string.Empty;
string currentLine = string.Empty;
string updatedLine = string.Empty;

foreach (string file in filePaths)
{
    currentFile = File.ReadAllText(file);

    if (currentFile.Contains("MySettings.xru"))
    {
        counter++;
        Debug.Print("Found in " + file);

        using (StreamReader streamReader = new StreamReader(file))
        {
            while (!streamReader.EndOfStream)
            {
                currentLine = streamReader.ReadLine();

                if (currentLine.Contains("MySettings.xru"))
                {
                    updatedLine = currentLine.Replace("db001", "db002");

                    break;
                }
            }
        }

        currentFile = currentFile.Replace(currentLine, updatedLine);

        // If file is ReadOnly then remove that attribute.
        FileAttributes attributes = File.GetAttributes(file);
        if ((attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly)
            File.SetAttributes(file, attributes ^ FileAttributes.ReadOnly);

        using (StreamWriter streamWriter = new StreamWriter(file))
        {
            streamWriter.Write(currentFile);
        }
    }
}