下载课件时将所有课件打包成一个压缩包，名称为 课件名称-时间

Tiobon.Core.Api/Controllers/Ghre/Ghre_CourseWareController.cs

@@ -11,4 +11,18 @@ public class Ghre_CourseWareController : BaseController<IGhre_CourseWareServices
     public Ghre_CourseWareController(IGhre_CourseWareServices service) : base(service)
     {
     }
+
+    #region 下载附件压缩包
+    /// <summary>
+    /// 下载附件压缩包
+    /// </summary>
+    /// <param name="id">课件ID</param>
+    /// <returns></returns>
+    [HttpPost("DownZip/{id}")]
+    public async Task<ServiceResult<string>> DownZip(long id)
+    {
+        return await _service.DownZip(id);
+    }
+    #endregion
+
 }

Tiobon.Core.Api/Tiobon.Core.xml

@@ -622,6 +622,13 @@
             课件(Controller)
             </summary>
         </member>
+        <member name="M:Tiobon.Core.Api.Controllers.Ghre_CourseWareController.DownZip(System.Int64)">
+            <summary>
+            下载附件压缩包
+            </summary>
+            <param name="id">课件ID</param>
+            <returns></returns>
+        </member>
         <member name="T:Tiobon.Core.Api.Controllers.Ghre_ExamController">
             <summary>
             考试(Controller)

Tiobon.Core.IServices/Ghre/IGhre_CourseWareServices.cs

@@ -1,4 +1,5 @@
 using Tiobon.Core.IServices.BASE;
+using Tiobon.Core.Model;
 using Tiobon.Core.Model.Models;
 
 namespace Tiobon.Core.IServices
@@ -8,5 +9,7 @@ namespace Tiobon.Core.IServices
 	/// </summary>	
     public interface IGhre_CourseWareServices :IBaseServices<Ghre_CourseWare, Ghre_CourseWareDto, InsertGhre_CourseWareInput, EditGhre_CourseWareInput>
 	{
+
+		Task<ServiceResult<string>> DownZip(long id);
     }
 }

Tiobon.Core.Services/Ghre/Ghre_CourseWareServices.cs

@@ -1,8 +1,10 @@
 
 using System.Data;
+using System.IO.Compression;
+using Microsoft.AspNetCore.Hosting;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
-using NPOI.Util.Collections;
+using SqlSugar;
 using Tiobon.Core.Common;
 using Tiobon.Core.Common.Caches;
 using Tiobon.Core.IRepository.Base;
@@ -20,10 +22,12 @@ public class Ghre_CourseWareServices : BaseServices<Ghre_CourseWare, Ghre_Course
 {
     private readonly IBaseRepository<Ghre_CourseWare> _dal;
     private IGhre_CourseServices _ghre_CourseServices;
+    private readonly IWebHostEnvironment _hostingEnvironment;
     private IGhre_CourseWareAttachmentServices _ghre_CourseWareAttachmentServices;
 
     public Ghre_CourseWareServices(ICaching caching,
         IGhre_CourseServices ghre_CourseServices,
+        IWebHostEnvironment hostingEnvironment,
         IGhre_CourseWareAttachmentServices ghre_CourseWareAttachmentServices,
         IBaseRepository<Ghre_CourseWare> dal)
     {
@@ -32,6 +36,7 @@ public class Ghre_CourseWareServices : BaseServices<Ghre_CourseWare, Ghre_Course
         base._caching = caching;
         _ghre_CourseServices = ghre_CourseServices;
         _ghre_CourseWareAttachmentServices = ghre_CourseWareAttachmentServices;
+        _hostingEnvironment = hostingEnvironment;
     }
 
     public override async Task<long> Add(InsertGhre_CourseWareInput entity)
@@ -136,4 +141,47 @@ public class Ghre_CourseWareServices : BaseServices<Ghre_CourseWare, Ghre_Course
         return result;
 
     }
+
+
+    public async Task<ServiceResult<string>> DownZip(long id)
+    {
+        var result = await base.QueryById(id);
+        if (result is null)
+            return ServiceResult<string>.OprateFailed("无效的课件ID！");
+        var attachments = await _ghre_CourseWareAttachmentServices.Query(x => x.CourseWareId == id);
+        var webRootPath = _hostingEnvironment.WebRootPath;
+        var outPath = $"/files/upload/{result.CourseWareName}_{DateTime.Now.ToString("yyyyMMddHHmmss")}.zip";
+        var files = attachments.Select(x => $"{webRootPath}{"\\" + x.RelativePath}").ToArray();
+        if (files.Length > 0)
+        {
+            CreateZip($"{webRootPath}{outPath}", files);
+            return ServiceResult<string>.OprateSuccess(null, outPath);
+
+        }
+        else
+            return ServiceResult<string>.OprateFailed("该课件无附件！");
+
+    }
+
+    public static void CreateZip(string zipPath, string[] filesToZip)
+    {
+        if (File.Exists(zipPath))
+        {
+            throw new IOException("File already exists.");
+        }
+
+        using (FileStream zipFile = new FileStream(zipPath, FileMode.Create))
+        {
+            using (ZipArchive zipArchive = new ZipArchive(zipFile, ZipArchiveMode.Create))
+            {
+                foreach (string file in filesToZip)
+                {
+                    if (File.Exists(file))
+                    {
+                        ZipArchiveEntry entry = zipArchive.CreateEntryFromFile(file, Path.GetFileName(file));
+                    }
+                }
+            }
+        }
+    }
 }

Tiobon.Core/Tiobon.Core.xml

@@ -622,6 +622,13 @@
             课件(Controller)
             </summary>
         </member>
+        <member name="M:Tiobon.Core.Api.Controllers.Ghre_CourseWareController.DownZip(System.Int64)">
+            <summary>
+            下载附件压缩包
+            </summary>
+            <param name="id">课件ID</param>
+            <returns></returns>
+        </member>
         <member name="T:Tiobon.Core.Api.Controllers.Ghre_ExamController">
             <summary>
             考试(Controller)