Question

我非常喜欢aspnetboilerplate框架，我现在正在学习/使用它。

如何在AppServices for aspnetboilerplate中执行'文件上传'逻辑/方法？我想出了角度部分并且工作正常。

如何编写在appservice层中接收文件上传的方法？关于crud有很好的例子，并且昂首阔步。现在我想实现文件上传。这在appservice层中是否可行，或者我是否必须在控制器方法中执行此操作？

Answer 1

通过ApplicationServices无法做到这一点。您需要在Web项目中使用MVC控制器和操作执行此操作，就像在常规项目中执行此操作一样。如果您需要更多帮助，我可以提供帮助。

Answer 2

所有应用程序服务都可以访问HttpContext对象，因此它们也能够处理文件上载。将文件上传到应用程序。 service确保使用正确的url +标头。

应用。服务示例：

public class MyUploadService : MyApplicationBaseClass, IMyUploadService
{
    /// <summary>
    /// References the logging service.
    /// </summary>
    private readonly ILogger _logger;

    /// <summary>
    /// Construct an new instance of this application service.
    /// </summary>
    public MyUploadService(ILogger logger)
    {
        _logger = logger;
    }

    /// <summary>
    /// Method used to handle HTTP posted files.
    /// </summary>
    public async Task Upload()
    {
        // Checking if files are sent to this app service.
        if(HttpContext.Current.Request.Files.Count == 0) 
            throw new UserFriendlyException("No files given.");

        // Processing each given file.
        foreach(var file in HttpContext.Current.Request.Files)
        {
            // Reading out meta info.
            var fileName = file.fileName;
            var extension = Path.GetExtension(file.FileName);

            // Storing file on disk.
            file.SaveAs("~/uploads");
        }
    }
}

Answer 3

我们实现文件上传方法： - 使用sql server fileTable技术 - 实现应用程序方法的服务以接受类似于此Dto的数据

 public FileDto File { get; set; }

...

public class FileDto
{
    public FileDto()
    {

    }
    public FileDto(string file, string fileType)
    {
        File = file;
        FileType = fileType;
    }
    [DisableAuditing]
    public string File { get; set; }
    public string FileName { get; set; }
    public Guid? StreamId { get; set; }
    public string FileType { get; set; } = "";
    [DisableAuditing]
    public string FileWithHeader
    {
        get
        {
            if (FileType == null|| FileType=="")
                return "";
            if (FileType.ToLower() == "jpg" || FileType.ToLower() == "jpeg")
                return "data:image/Jpeg;base64," + File;
            if (FileType.ToLower() == "png")
                return "data:image/png;base64," + File;
            if (FileType.ToLower() == "gif")
                return "data:image/gif;base64," + File;
            if (FileType.ToLower() == "ppt")
                return "data:application/vnd.ms-powerpoint;base64," + File;
            if (FileType.ToLower() == "xls")
                return "data:application/vnd.ms-excel;base64," + File;
            if (FileType.ToLower() == "doc")
                return "data:application/msword;base64," + File;
            if (FileType.ToLower() == "zip")
                return "data:application/zip;base64," + File;
            if (FileType.ToLower() == "exe")
                return "data:application/octet-stream;base64," + File;
            if (FileType.ToLower() == "txt")
                return "data:text/plain;base64," + File;
            if (FileType.ToLower() == "pdf")
                return "data:application/pdf;base64," + File;
            if (FileType.ToLower() == "bmp")
                return "data:image/bmp;base64," + File;
            if (FileType.ToLower() == "csv")
                return "data:text/csv;base64," + File;
            if (FileType.ToLower() == "pptx")
                return "data:application/vnd.openxmlformats-officedocument.presentationml.presentation;base64," + File;
            if (FileType.ToLower() == "xlsx")
                return "data:application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;base64," + File;
            if (FileType.ToLower() == "docx")
                return "data:application/vnd.openxmlformats-officedocument.wordprocessingml.document;base64," + File;
            if (FileType.ToLower() == "rar")
                return "data:application/x-rar-compressed;base64," + File;
            if (FileType.ToLower() == "rtf")
                return "data:application/rtf;base64," + File;
            return "";
        }
    }
}

和方法实施

 public UploadFileOutput UploadFile(UploadFileInput input)
    {
        if (input.Id <= 0 || input.File == null)
        {
            throw new UserFriendlyException(L("GetDataError"));
        }

        return new UploadFileOutput()
        {

            StreamId = _attachmentRepo.InsertAttachment(input.File.FileName, Convert.FromBase64String(input.File.File), LIMSConsts.HeightThumbnail, true, ServerConfig.ThumbnailImagePath),
        };

    }

insertAttachment方法：

public Guid InsertAttachment(string fileName, byte[] fileStream, int heightThumbnail = 50, bool saveThumbnail = false,string thumbLocationPath=null)
    {

        Guid AttachmentId = Guid.Empty;

        SqlParameter _attachmentId = new SqlParameter();
        _attachmentId.ParameterName = "@attachmentId";
        _attachmentId.Direction = System.Data.ParameterDirection.InputOutput;
        _attachmentId.Value = AttachmentId;

        SqlParameter _fileStream = new SqlParameter();
        _fileStream.SqlDbType = System.Data.SqlDbType.VarBinary;
        _fileStream.Value = fileStream;
        _fileStream.ParameterName = "@fileStream";

        Context.Database.ExecuteSqlCommand("EXECUTE dbo.sp_AttachmentFile_Insert @AttachmentId OUTPUT,@fileName,@fileStream",
            _attachmentId,
            new SqlParameter("@fileName", fileName),
            _fileStream);

        if (saveThumbnail == true) {
            var ms = new MemoryStream(fileStream);
            var image = Image.FromStream(ms);

            var width = (int)(heightThumbnail * image.Width / image.Height);
            var height = (int)(heightThumbnail);

            var Thumbnail = new Bitmap(width, height);
            Graphics.FromImage(Thumbnail).DrawImage(image, 0, 0, width, height);                
            Bitmap Thumb= new Bitmap(Thumbnail);
            Thumb.Save(Path.Combine(thumbLocationPath, _attachmentId.Value+".jpg"), ImageFormat.Jpeg);

        }

        return (Guid)_attachmentId.Value;
    }

和存储过程实现

ALTER PROC [dbo].[sp_AttachmentFile_Insert]
@AttachmentId uniqueidentifier out,
@fileName nvarchar(256),
@fileStream VARBINARY(max)

AS SET @ AttachmentId = NEWID（）

WHILE(EXISTS(SELECT 1 FROM dbo.Attachment WHERE name=@fileName))
BEGIN
    DECLARE @fileExtention NVARCHAR(100)
    SELECT @fileExtention ='.'+dbo.GetFileExtension(@fileName)
    SET @fileName=REPLACE(@fileName,@fileExtention,'')+
        CAST(DATEPART( DAY, GETDATE()) AS VARCHAR(10))+'_'
        +CAST(DATEPART( HOUR, GETDATE()) AS VARCHAR(10))+'_'+
        +CAST(DATEPART( MINUTE, GETDATE()) AS VARCHAR(10))+'_'+
        +CAST(DATEPART( SECOND, GETDATE()) AS VARCHAR(10))+@fileExtention
END

INSERT into dbo.Attachment(stream_id,name,file_stream)
    VALUES(@AttachmentId,@fileName,@fileStream)

最后感谢“HalilİbrahimKalkan”这个令人敬畏的框架。

Answer 4

无法从Appservice上传文件，您需要使用特定方法创建一个Web Api控制器。

  public class EntityImageController : AbpApiController
 {
      private IEntityImageAppService iEntityAppService;

      public EntityImageController( IEntityImageAppService pEntityImgAppService ) : base()
      {
           this.LocalizationSourceName = AppConsts.LocalizationSourceName;
           this.iEntityImgAppService = pEntityImgAppService;
      }          

      [AbpAuthorize( PermissionNames.Entity_Update )]
      [HttpPost]
      public async Task<HttpResponseMessage> Set()
      {

           // Check if the request contains multipart/form-data.
           if( !Request.Content.IsMimeMultipartContent() )
           {
                throw new HttpResponseException( HttpStatusCode.UnsupportedMediaType );
           }

           string root = HttpContext.Current.Server.MapPath( "~/App_Data" );
           var provider = new MultipartFormDataStreamProvider( root );

           try
           {
                // Read the form data.
                await Request.Content.ReadAsMultipartAsync( provider );

                var mEntityId = provider.FormData[ "EntityId" ];

                MultipartFileData mFileData = provider.FileData.FirstOrDefault();
                var mFileInfo = new FileInfo( mFileData.LocalFileName );
                var mImageBytes = File.ReadAllBytes( mFileInfo.FullName );

                await this.iEntityImgAppService.Set( new EntityImageInput
                {
                     ImageInfo = mImageBytes,
                     EntityId = Convert.ToInt32( mEntityId )
                } );

                return Request.CreateResponse( HttpStatusCode.OK );
           }
           catch( System.Exception e )
           {
                return Request.CreateErrorResponse( HttpStatusCode.InternalServerError, e );
           }
      }

}

Answer 5

在web.core项目中创建文件上传控制器。然后引用您的appService处理文件。

        [HttpPost]
        [AbpMvcAuthorize(PermissionNames.TenantPageJob)]
        public async Task UploadExcelJobs()
        {
            var files = Request.Form.Files;
            foreach (var file in files)
            {
                if (file.Length > 0 && file.ContentType.Contains("excel"))
                {
                    var targetPath = Path.Combine(Path.GetTempPath(), (new Guid().ToString()), file.FileName);
                    var fs = new FileStream(targetPath, FileMode.OpenOrCreate);
                    await file.CopyToAsync(fs);
                    await _myAppService.ProcessFile(targetPath);
                    System.IO.File.Delete(targetPath);
                }
            }
        }

Answer 6

重点是如何从从ApplicationService派生的XXXAppService类的方法中获取文件，而不是从从AbpController或Microsoft.AspNetCore.Mvc.Controller派生的XXXController中获取文件。

所以您应该记住该类：HttpContext / HtttpRequest / HttpResponse !!!

解决方案：在类XXXAppService中注入httpContextAccessor即可实现。 https://docs.microsoft.com/en-us/aspnet/core/fundamentals/http-context?view=aspnetcore-5.0

这是我的代码，希望对您有帮助！

--------服务器端（ABP）--------------

[Route("api/")]
public class XXXAppService : ApplicationService
{
    private readonly IHttpContextAccessor _httpContextAccessor;
    public XXXAppService(IHttpContextAccessor httpContextAccessor)
    {
        _httpContextAccessor = httpContextAccessor;
    }

    [HttpPost, Route("upload")]
    public void UploadFile()
    {
        var files = _httpContextAccessor.HttpContext.Request.Form.Files;
        //do logics as you like here...
    }
}

---（1）UI（PrimeNG上传组件）

<p-fileUpload name="demo[]" [multiple]="true" [url]="uploadUrl" 
    (onUpload)="onUpload($event)">
  <ng-template pTemplate="content">
    <ul *ngIf="uploadedFiles.length">
      <li *ngFor="let file of uploadedFiles">{{file.name}} - {{file.size / 1000}}kb</li>
   </ul>
  </ng-template>
</p-fileUpload>

---（2）UI逻辑（组件）

import { AppConsts } from '@shared/AppConsts';

uploadUrl: string = '';
uploadedFiles: any[] = [];

ngOnInit() {
  //http://localhost:21021/api/upload
  let url_ = AppConsts.remoteServiceBaseUrl + "/api/upload";  
  this.uploadUrl = url_.replace(/[?&]$/, "");
}

onUpload(event: any) {
  _.forEach(event.files, v => {
  this.uploadedFiles.push(v);
});

}

你如何在AppServices for aspnetboilerplate中进行文件上传方法？

6 个答案: