Open a file and replace strings in C#

Question

I\'m trying to figure out the best way to open an existing file and replace all strings that match a declared string with a new string, save it then close.

Suggestio

Answer 1

public partial class ReadAndChange : System.Web.UI.Page
{
    ArrayList FolderList = new ArrayList();
    ArrayList FolderListSearch = new ArrayList();
    ArrayList FileList = new ArrayList();
    protected void Page_Load(object sender, EventArgs e)
    {
        AllFolderList("D:\\BinodBackup\\Nilesh\\14.5.2013\\Source");
        foreach (string Path in FolderList)
        {
            AllFileList(Path);
        }
        foreach (string Path in FileList)
        {
            ReplaceFile(Path, Path.Replace("Source", "EditedCode"));
        }

        //string SourcePath = "D:\\BinodBackup\\Nilesh\\14.5.2013\\Onesource\\Onesource\\UserManagement\\UserControls\\AddUserDetails.ascx.cs";
        //string ReplacePath = "D:\\AddUserDetails.ascx.cs";
        //ReplaceFile(SourcePath, ReplacePath);
    }

    private static void ReplaceFile(string SourcePath, string ReplacePath)
    {
        int counter = 1;
        string line;

        // Read the file and display it line by line.
        System.IO.StreamReader file = new System.IO.StreamReader(SourcePath);
        while ((line = file.ReadLine()) != null)
        {
            if (!(line.Contains("//")))
            {
                if (line.Contains(".LogException("))
                {
                    //Console.WriteLine(counter.ToString() + ": " + line);
                    string[] arr = line.Split(',');
                    string stringToReplace = arr[0].Replace("LogException", "Publish") + " , " + arr[2].Trim() + " , " + arr[3].Replace(");", "").Trim() + " , " + arr[1].Trim() + ");";
                    //File.WriteAllText(currentPath, Regex.Replace(File.ReadAllText(currentPath), line, line + " Added"));
                    File.WriteAllText(ReplacePath, File.ReadAllText(ReplacePath).Replace(line, stringToReplace));
                    //ReplaceInFile(currentPath, line, stringToReplace);
                }
            }

            counter++;
        }

        file.Close();
    }
    private void AllFileList(string FolderPath)
    {
        DirectoryInfo dir = new DirectoryInfo(FolderPath);
        DirectoryInfo[] subdir = dir.GetDirectories();
        if (subdir.Length > 0)
        {

            foreach (DirectoryInfo dr in subdir)
            {
                FileInfo[] files1 = dr.GetFiles();
                foreach (FileInfo file in files1)
                {
                    if(file.Name.EndsWith(".cs"))
                    CheckAndAdd((file.DirectoryName + "\\" + file.Name), FileList);
                }

            }
        }
    }

    private void AllFolderList(string FolderPath)
    {
        string CurFolderPatgh = FolderPath;
        Again:
        AddToArrayList(CurFolderPatgh);
        DirectoryInfo dir = new DirectoryInfo(CurFolderPatgh);
        DirectoryInfo[] subdir = dir.GetDirectories();

        if (subdir.Length > 0)
        {
            foreach (DirectoryInfo dr in subdir)
            {
                AddToArrayList(((System.IO.FileSystemInfo)(dir)).FullName + "\\" + dr.Name);
            }
        }
        if (FolderListSearch.Count > 0)
        {
            foreach (string dr in FolderListSearch)
            {
                CurFolderPatgh = dr;
                FolderListSearch.Remove(dr);
                goto Again;
            }
        }
    }

    private void AddToArrayList(string FolderPath)
    {
        if (!(FolderList.Contains(FolderPath)))
        {
            CheckAndAdd(FolderPath, FolderList);
            CheckAndAdd(FolderPath, FolderListSearch);
        }
    }

    private void CheckAndAdd(string FolderPath,ArrayList ar)
    {
        if (!(ar.Contains(FolderPath)))
        {
            ar.Add(FolderPath);
        }
    }

    public static void ReplaceInFile(
                      string filePath, string searchText, string replaceText)
    {

        var content = string.Empty;
        using (StreamReader reader = new StreamReader(filePath))
        {
            content = reader.ReadToEnd();
            reader.Close();
        }

        content = content.Replace(searchText, replaceText);

        using (StreamWriter writer = new StreamWriter(filePath))
        {
            writer.Write(content);
            writer.Close();
        }
    }
}