如何在两个目录之间进行比较并获取丢失的文件?C#Winform [英] How to compare between two directories and get the missing files? c# winform

问题描述

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enter code here 

private void button1_Click(object sender, EventArgs e)
    {
        try
        {
            string[] Folder1 = Directory.GetFiles(txtFolder1.Text, comboBox1.SelectedItem.ToString());
            string[] Folder1FileNames = new string[Folder1.Length];
            int c = 0;
            string fname1;


            foreach (string f in Folder1)
            {
                fname1 = Path.GetFileName(f);
                Folder1FileNames[c] = fname1;

                c++;
            }



            string fname2;
            string[] Folder2 = Directory.GetFiles(txtFolder2.Text, comboBox1.SelectedItem.ToString());
            string[] Folder2FileNames = new string[Folder2.Length];
            int t = 0;
            foreach (string f in Folder2)
            {
                fname2 = Path.GetFileName(f);
                Folder2FileNames[t] = fname2;
                t++;

            }
            int m=0;
            foreach (string f in Folder1FileNames)
            {
                while (f != Folder2FileNames[m] && m < Folder2FileNames.Length)
                {
                    m++;
                    if (m == Folder2FileNames.Length)
                    {
                        Label newlabe = new Label();
                        newlabe.Text = f;
                        if(!listBox1.Items.Contains(newlabe.Text))
                        {
                            listBox1.Items.Add(newlabe.Text);

                        }
                    }
                }
                m = 0;
            }



        }
        catch (Exception ex)
        {
            label1.Text = ex.Message;
        }

我创建了两个包含SourceDirectory(Folder1)和CompareDirectory(Folder2)中的文件的数组，然后创建了两个包含文件名且没有完整ptah的数组(以便在araay之间进行比较)，然后我尝试了比较数组，然后将丢失的文件添加到列表框中.问题是，当我尝试它时，它给了我源文件夹中第一个丢失的文件(例如，源文件夹包含下一个文件:a.txt，b.txt，c.txt，d.txt并比较文件夹包含:a.txt，b.txt，列表框中的结果将是c.txt，并且标签将显示:您不在数组索引中")我应该怎么办 ?谢谢！

I created two arrays that contains Files From SourceDirectory(Folder1) and CompareDirectory(Folder2) , then more 2 arrays that contains the files name with out the full ptah (in order to compare between the araays) ,then i have tried to compare between the arrays ,and add the missing file to the list box . the problem is that when I tried it it gave me the first missing file from the source folder , (e.g source folder contains the next files : a.txt,b.txt,c.txt,d.txt and compare folder contains:a.txt,b.txt , the result in the list box will be c.txt , and the label will show:"you are out of the array index" ) what should i do ? thanks!

推荐答案

您可以使用更简单，更整洁的解决方案，类似的方法应该可以解决:

You can go with a bit simpler and tidier solution, something like that should work:

var dir1Files = Directory
    .EnumerateFiles(txtFolder1.Text, "*", SearchOption.AllDirectories)
    .Select(Path.GetFileName);
var dir2Files = Directory
    .EnumerateFiles(txtFolder2.Text, "*", SearchOption.AllDirectories)
    .Select(Path.GetFileName);
var diffs = dir1Files.Except(dir2Files).Distinct().ToArray();   

listBox1.Items.AddRange(diffs);

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