Question

我有两个文本文件bala.txt和bala1.txt

bala.txt逐行包含文本

balamurugan,rajendran,chendurpandian
christopher
updateba

bala1.txt逐行包含文本

ba

这里我需要使用bala.txt检查bala1.txt并将其写入日志文件

LineNo : 0 : balamurugan,rajendran,chendurpandian
LineNo : 2 : updateba

现在它只写了一行

LineNo : 0 : balamurugan,rajendran,chendurpandian

之后循环播出

这是我的代码

while (((line = file.ReadLine()) != null & (line2 = file2.ReadLine()) != null))
                        {
                            if (line.Contains(line2))
                            {
                                dest.WriteLine("LineNo : " + counter.ToString() + " : " + line + "<br />");
                            }
                            counter++;
                        }

任何建议??

编辑：

string FilePath = txtBoxInput.Text;
    string Filepath2 = TextBox1.Text;
    int counter = 0;
    string line;
    string line2;


        DirectoryInfo Folder = new DirectoryInfo(textboxPath.Text);
        var dir = @"D:\New folder\log";

        if (Folder.Exists)
        {
            if (!Directory.Exists(dir))
                Directory.CreateDirectory(dir);
        }
        if (File.Exists(FilePath) & File.Exists(Filepath2))
        {
            // Read the file and display it line by line.
            using (var file = File.OpenText(FilePath))
            using (var file2 = File.OpenText(Filepath2))
            using (var dest = File.AppendText(Path.Combine(dir, "log.txt")))
            {
                while (((line = file.ReadLine()) != null & (line2 = file2.ReadLine()) != null))
                {
                    if (line.Contains(line2))
                    {
                        dest.WriteLine("LineNo : " + counter.ToString() + " : " + line + "<br />");
                    }

                    counter++;
                }

            }

}

EDIT（2）：我需要在文件夹日志中创建两个文本文件，并将其作为ba.txt写入文本文件，内容为

LineNo : 0 : balamurugan,rajendran,chendurpandian
LineNo : 2 : updateba

和ra.txt，内容为

LineNo : 0 : balamurugan,rajendran,chendurpandian

任何建议??

EDIT（3）：我需要通过代码创建一个名为Log的文件夹，并且必须在该日志文件夹ba.txt和ra.txt中创建。

Answer 1

第二个文件阅读器的基础流到达流的末尾，并且在循环的下一次迭代之前不被重置。在比较之前，您需要将每个文件的所有行复制到内存中。试试这个：

List<string> file1Lines = new List<string>();
List<string> file2Lines = new List<string>();

while ((line = file.ReadLine()) != null)
{
    file1Lines.Add(line);
}

while ((line2 = file2.ReadLine()) != null)
{
    file2Lines.Add(line2);
}

foreach (string f1line in file1Lines)
{
    foreach (string f2line in file2Lines)
    {
        if (f1line.Contains(f2line))
        {
            dest.WriteLine("LineNo : " + counter.ToString() + " : " + f1line + "<br />");
        }

    }
    counter++;
}

Answer 2

试试这个：

string FilePath = txtBoxInput.Text, Filepath2 = TextBox1.Text;
int counter = 0;
string line, line2;

DirectoryInfo Folder = new DirectoryInfo(textboxPath.Text);
var dir = @"D:\New folder\log";

if (Folder.Exists)
    if (!Directory.Exists(dir)) Directory.CreateDirectory(dir);

if (File.Exists(FilePath) && File.Exists(Filepath2))
{   // Read the file and display it line by line.
    using (var file = File.OpenText(FilePath))
    {
        using (var file2 = File.OpenText(Filepath2))
        {
            while((line2 = file2.ReadLine()) != null)
            {
                //YOU NEED TO CHECK IF FILE ALREADY EXISTS
                // AND YOU WANT TO OVERWRITE OR CREATE NEW
                //WITH SOME OTHER NAME
                //---------------------------------------CREATE NEW FILE FOR
                //---------------------------------------EACH LINE IN file2
                using (var dest = File.AppendText(Path.Combine(dir, line2 + ".txt")))
                {
                    while ((line = file.ReadLine()) != null)
                    {
                        if (line.Contains(line2))
                            dest.WriteLine("LineNo : " + 
                                counter.ToString() + " : " + line + "<br />");
                        counter++;
                    }
                    //IF THE SECOND FILE ONLY CONTAINS 1 LINE THEN YOU
                    //DON'T NEED THIS.
                    //we need to go to begning of first file
                    file.BaseStream.Seek(0, SeekOrigin.Begin);
                    counter = 0;
                }
            }
        }
    }
}

编辑：从用户那里获取文件路径。

如果要获取目录名以保存日志文件，请给出一个打开文件对话框的按钮以选择文件或文件夹浏览器对话框。

//OPEN FILE -- you will need two buttons one 
//for each text boxes
void btnFile_Click(object sender, EventArgs e)
{
    var fbd = new OpenFileDialog();
    fbd.Multiselect = false;
    fbd.CheckFileExists = true;
    fbd.CheckPathExists = true;
    if(fbd.ShowDialog()==DialogResult.Ok)
    {
        textBox1.Text = fbd.FileName;
    }
}

//SELECT FOLDER
string _logFolderPath;//use this inplace of @"D:\new folder\log";
void btnFolder_click(object sender, EventArgs e)
{
    var fd = new FolderBrowserDialog();
    if(fd.ShowDialog()==DialogResult.OK)
    {
        _logFolderPath = fd.SelectedPath;
    }
}

Answer 3

private void Comparer(string fileLocation1, string fileLocation2, string resultLocation)
{
    StreamReader source = new StreamReader(fileLocation1);
    StreamReader pattern = new StreamReader(fileLocation2);
    StreamWriter result = File.CreateText(resultLocation);

    //reading patterns
    List<String> T = new List<string>();
    string line;
    while ((line = pattern.ReadLine()) != null)
        T.Add(line);
    pattern.Close();

    //finding matches and write them in output
    int counter = 0;
    while ((line = source.ReadLine()) != null)
    {
        foreach (string pat in T)
        {
            if (line.Contains(pat))
            {
                result.WriteLine("LineNo : " + counter.ToString() + " : " + line);
                break; //just if you want distinct output
            }
        }
        counter++;
    }

    source.Close();
    result.Close();
}

---------------------------- EDIT ------------------ ---------------- 对于你在评论中提到的那个

private void Comparer(string fileLocation1, string fileLocation2, string resultFolder)
{
    StreamReader source = new StreamReader(fileLocation1);
    StreamReader pattern = new StreamReader(fileLocation2);
    Directory.CreateDirectory(resultFolder);
    //reading patterns
    List<String> T = new List<string>();
    string line;
    while ((line = pattern.ReadLine()) != null)
        T.Add(line);
    pattern.Close();

    //finding matches and write them in output
    int counter;
    foreach (string pat in T)
    {
        StreamWriter result = File.CreateText(Path.Combine(resultFolder, pat + ".txt"));
        source.BaseStream.Position = counter = 0;
        while ((line = source.ReadLine()) != null)
        {
            if (line.Contains(pat))
                result.WriteLine("LineNo : " + counter.ToString() + " : " + line);
            counter++;
        }
        result.Close();
    }
    source.Close();
}

比较两个文本文件

3 个答案: