Question

我有一个目录 'Folder'，该目录中有许多子目录。每个子目录中都有许多图像。我想遍历 'Folder' 目录中的子目录，然后遍历每个目录中的所有图像以将图像导出到 Excel，每个子目录中的图像都在一个 Excel 工作表中。

例如如果我有十个子目录，我应该有一个 Excel 工作簿和十个 Excel 工作表，然后在每个 Excel 工作表中会有来自每个子目录的图像。

这是我尝试过的方法，但图像只出现在工作表 1 而不是所有工作表中：

   public void ExportToExcel()
        {
            //for export
            ExcelPackage objExcelPackage = new ExcelPackage();   //create new workbook

            string[] filesindirectory = Directory.GetDirectories(Server.MapPath("~/Folder"));
            int count = 0;
            int count1 = 0;
            int x = 25;
            int finalValue = 0;

            foreach (string subdir in filesindirectory)
            {                      
                count++;
                ExcelWorksheet ws = objExcelPackage.Workbook.Worksheets.Add("Worksheet" + count); //create new worksheet

            foreach (string img in Directory.GetFiles(subdir))
            {
                count1++;
                System.Web.UI.WebControls.Image TEST_IMAGE = new System.Web.UI.WebControls.Image();
                System.Drawing.Image myImage = System.Drawing.Image.FromFile(img);
                var pic = ws.Drawings.AddPicture(count1.ToString(), myImage);
                // Row, RowoffsetPixel, Column, ColumnOffSetPixel
                if (count1 > 1)
                {
                    pic.SetPosition(finalValue, 0, 2, 0);
                    finalValue += (x + 1); // Add 1 to have 1 row of empty row
                }
                else
                {
                    pic.SetPosition(count1, 0, 2, 0);
                    finalValue = (count1 + x) + 1; // Add 1 to have 1 row of empty
                }
            }
            }

            var filepath = new FileInfo(@"C:\Users\user\Desktop\Test\" + datetime.ToString("dd-MM-yyyy_hh-mm-ss") + ".xlsx");
            objExcelPackage.SaveAs(filepath);
        }

如何循环遍历目录中的每个子目录，然后使用 C# 循环遍历每个子目录中的所有图像？

Answer 1

这应该列出从 C:\Images 开始的所有文件，并遍历所有子目录及其子目录。

public void ExportToExcel()
{
    //for export
    var objExcelPackage = new ExcelPackage(); //create new workbook

    this.ListFiles(objExcelPackage, 0, Server.MapPath("~/Folder"));

    var filepath = new FileInfo(@"C:\Users\user\Desktop\Test\" + datetime.ToString("dd-MM-yyyy_hh-mm-ss") + ".xlsx");
    objExcelPackage.SaveAs(filepath);
}

public void ListFiles(ExcelPackage objExcelPackage, int worksheetIndex, string path)
{
    var imageCount = 0;
    var x = 25;
    var finalValue = 0;

    var files = Directory.GetFiles(path).Select(s => new FileInfo(s));

    if (files.Any())
    {
        //create new worksheet
        var ws = objExcelPackage.Workbook.Worksheets.Add("Worksheet" + (++worksheetIndex)); 

        foreach (var file in files)
        {
            imageCount++;

            var TEST_IMAGE = new System.Web.UI.WebControls.Image();
            var myImage = System.Drawing.Image.FromFile(img);
            var pic = ws.Drawings.AddPicture(imageCount.ToString(), myImage);

            // Row, RowoffsetPixel, Column, ColumnOffSetPixel
            if (imageCount > 1)
            {
                pic.SetPosition(finalValue, 0, 2, 0);
                finalValue += (x + 1); // Add 1 to have 1 row of empty row
            }
            else
            {
                pic.SetPosition(imageCount, 0, 2, 0);
                finalValue = (imageCount + x) + 1; // Add 1 to have 1 row of empty
            }
        }
    }

    foreach (var dir in Directory.GetDirectories(path))
    {
        this.ListFiles(objExcelPackage, worksheetIndex, dir);
    }
}

Answer 2

Janne Matikainen 答案是正确的，但你需要知道如何修改你的代码...

首先更改您的代码这一行

 string[] filesindirectory = Directory.GetFiles(Server.MapPath("~/Folder"));

至

 string[] filesindirectory = Directory.GetDirectories(Server.MapPath("~/Folder"));

其次，您需要在子文件夹路径中搜索文件，这是您的

foreach (string subdir in filesindirectory)

subdir 是您的目录路径。

只需返回与获取文件相同的操作即可

foreach (string img in  Directory.GetFiles(subdir))

完成 foreach 子目录后

foreach (string img in  Directory.GetFiles(subdir)) 
{
   // Your Code
}
// Reset the Count1
count1 = 0;

重置它，因为您要增加每个 sheet 的动态行生成。
然后你在 new sheet 并且你没有重置它。
会按照之前的sheet继续计数。

要获取文件夹名称，您可以通过拆分轻松获取它。
在您创建作品之前sheet，请按照以下步骤进行操作。

string[] splitter = subdir.Split('\');
string folderName = splitter[splitter.Length - 1];

做笔记 如果 folderName 包含一些符号，它可能无法将其设置为 excel worksheet 而且名字不能太长。
请确保您替换为 excel worksheet

支持的符号

Answer 3

Directory.GetFiles(dir) returns dir 中的所有文件，不含文件夹你应该使用 Directory.EnumerateDirectories(dir)

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

class Program
{
    private static void Main(string[] args)
    {
        try
        {
            string dirPath = @"\archives09\reports";

            List<string> dirs = new List<string>(Directory.EnumerateDirectories(dirPath));

            foreach (var dir in dirs)
            {
                Console.WriteLine("{0}", dir.Substring(dir.LastIndexOf("\") + 1));
            }
            Console.WriteLine("{0} directories found.",  dirs.Count);
        }
        catch (UnauthorizedAccessException UAEx)
        {
            Console.WriteLine(UAEx.Message);
        }
        catch (PathTooLongException PathEx)
        {
            Console.WriteLine(PathEx.Message);
        }
    }
}

Answer 4

The Composite Pattern 符合您的问题。

public interface IExcelWorksheetAdapter
{
    //todo: implement this method, here you have everything you need for an image file
    void AddPicture(FileSystemItem aFile);
}

public class FileSystemItem
{
    public virtual string FullPath { get; protected set; }
    public virtual int Level { get; set; }
    public virtual string Name
    {
        get
        {
            if (string.IsNullOrWhiteSpace(FullPath)) return string.Empty;
            return FullPath.Split('\').Last();
        }
    }

    public virtual void Operation(IExcelWorksheetAdapter ws) { }
}

public class FolderItem : FileSystemItem
{
    public FolderItem(string fullPath)
    {
        Items = new List<FileSystemItem>();
        if (!Directory.Exists(fullPath)) return;

        FullPath = fullPath;

        var files = Directory.GetFiles(FullPath).Select(p => new FileItem(p) { Level = this.Level + 1 }).ToList();
        Items.AddRange(files);

        var subFolders = Directory.GetDirectories(fullPath).Select(p => new FolderItem(p) {Level = this.Level + 1}).ToList();
        Items.AddRange(subFolders);
    }

    public List<FileSystemItem> Items { get; set; }

    public override void Operation(IExcelWorksheetAdapter ws)
    {
        Items.ForEach(x => x.Operation(ws));
    }
}

public class FileItem : FileSystemItem
{
    public FileItem(string path)
    {
        if (File.Exists(path))
        {
            FullPath = path;
        }
    }

    public override void Operation(IExcelWorksheetAdapter ws)
    {
        ws.AddPicture(this);
    }
}

[TestFixture]
public class DirectoryCompositeTest
{
    [Test]
    public void Operation_for_a_directory_files()
    {
        var directory = new FolderItem(AppDomain.CurrentDomain.BaseDirectory);
        directory.Operation(new Sample()); // give your IExcelWorksheetAdapter implementation here.

    }
}

public class Sample : IExcelWorksheetAdapter
{
    public void AddPicture(FileSystemItem aFile)
    {
        Console.WriteLine(Indent(aFile.Level) + aFile.Name);
    }

    private string Indent(int level)
    {
        string result = "";
        for (int i = 0; i < level; i++)
        {
            result += "-";
        }
        return result;
    }
}

遍历目录中的子目录

Loop through sub directories in directory

c#

asp.net

directory

excel

subdirectory