上载文件时出错:System.InvalidOperationException:'实体类型Document不是当前上下文模型的一部分. [英] Error when uploading file: System.InvalidOperationException: 'The entity type Document is not part of the model for the current context.'

问题描述

尝试将文件上传到文件夹时出现以下错误:

I am getting below error when trying to upload a file to a folder:

System.InvalidOperationException:'实体类型Document不是当前上下文模型的一部分."

System.InvalidOperationException: 'The entity type Document is not part of the model for the current context.'

这是代码:

public ActionResult AddHRDocument()
{
    DocumentsConn db = new DocumentsConn();
    return View();
}

[HttpPost]
public ActionResult AddHRDocument(HttpPostedFileBase file)
{
    //Extract Image File Name.
    string fileName = System.IO.Path.GetFileName(file.FileName);

    //Set the Image File Path.
    string filePath = "~/Documents/HR/" + fileName;

    //Save the Image File in Folder.
    file.SaveAs(Server.MapPath(filePath));

    //Insert the Image File details in Table.
    DocumentsConn db = new DocumentsConn();
    db.Documents.Add(new Document
    {
        DocumentName = fileName,
        Document_url = filePath

    });
    db.SaveChanges();
}

推荐答案

我使用此代码上传了多个文件.您可以编辑0ne文件的代码.

I used this code for upload multi files.you can edit your code for 0ne file.

查看:编写 enctype ="multipart/form-data"

   @using (Html.BeginForm("ActionName", "ControolerName", FormMethod.Post, new { enctype = "multipart/form-data" }))

上传文件框:

  @Html.TextBoxFor(Model => Model.Files, new { type = "file", name = "Files", multiple = "multiple", @class = "form-control", accept = "image/*" })

在操作中使用以下代码从请求中获取文件:

use below code in your action for get files from request:

  [HttpPost]
  public ActionResult UploadFile(long Id)

不需要动作输入参数 HttpPostedFileBase .

                  for (int i = 0; i < Request.Files.Count; i++)
                    {
                        var file = Request.Files[i];                             

                        string fileName = Guid.NewGuid() + System.IO.Path.GetExtension(file.FileName)?.ToLower();

                        string path = Server.MapPath("~") + "Files\\UploadImages\\" + fileName;

                        //TODO: Fill Properties Table.example: DocType Or Id Or AddressFile
                       // entity.DocType = System.IO.Path.GetExtension(file.FileName)?.ToLower();

                        if (File.DocType?.ToLower() == ".png" || File.DocType?.ToLower() == ".img"
                                                                || File.DocType?.ToLower() == ".jpeg"
                                                                || File.DocType?.ToLower() == ".jpg")
                        {                              
                            file.SaveAs(path);
                            //TODO: Save Info File In Database
                        }

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