我是这样做的：
查看.cs
<div class="row">
@using (Html.BeginForm("Upload", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="FileUpload" id="FileUpload" runat="server" />
<input type="submit" value="Save" class="btn btn-default" />
}
</div>
我使用的是HomeController，所以你在那里创建了Upload 函数。我还包括您如何将文件内容存储在数据库中，而不仅仅是位置，下面的代码使用了提供的Assignment 模型，但我还将展示如何将其保存到数据库中以我为表创建的模型为例，ITEM_ATCHMT。
如果您只有页面上的 FileUpload 控件并且没有使用它在视图上填充数据，则您不必传入模型并将其传回，因此此函数不会这样做，并且我的视图不使用模型 - 你的可能不同，如果在你的视图上使用，你可能希望保持模型被传入、返回。
我设置了一次发布多个对象，所以我有一个List<ViewDataUploadFilesResult> 接收他们的数据，并在将每个文件及其元数据保存到数据库的过程中进行迭代。不过，您可以使用它一次只保存一个文件，因此我添加了代码并注释掉了多个文件的部分。希望它不会让任何人感到困惑 - 最后只有两种不同的方式来做同样的事情。
HomeController.cs
[HttpPost]
public ActionResult Upload()
{
//var r = new List<ViewDataUploadFilesResult>();
var r = new ViewDataUploadFilesResult();
Assignment a = new Assignment();
if (ModelState.IsValid)
{
if (Request.Files.Count > 0)
{
HttpPostedFileBase file = Request.Files[0];
if (file.ContentLength > 0)
{
int fileSize = file.ContentLength;
var fileName = Path.GetFileName(file.FileName);
//You could do this to get the content -
//it would need a varbinary(max) field
//Stream posted file into a byte array
byte[] fileByteArray = new byte[fileSize];
file.InputStream.Read(fileByteArray, 0, fileSize);
//Uploading properly formatted file to server.
string fileLocation = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
if (!Directory.Exists(Server.MapPath("~/App_Data/uploads")))
Directory.CreateDirectory(Server.MapPath("~/App_Data/uploads"));
file.SaveAs(fileLocation);
// I used a ViewModel to collect my file information
ViewDataUploadFilesResult r = new ViewDataUploadFilesResult();
r.Name = fileName;
r.FilePath = fileLocation;
r.Length = fileSize;
r.FileObj = file;
r.Content = fileByteArray;
// I provided a list so I could upload multiple files
// at once, but you might've just had the one item, above
//r.Add(new ViewDataUploadFilesResult()
//{
// Name = fileName,
// FilePath = fileLocation,
// Length = fileSize,
// FileObj = file,
// Content = fileByteArray
//});
// Below is for singular ViewDataUploadFilesResult objects (uncomment the loop for multiple)
//for (int i = 0; i < r.Count; i++)
//{
//assignment.FileLocation = r[i].FilePath; //multiple objects need an index, [i]
assignment.FileLocation = r.FilePath; //singular objects don't
assignment.Status = "Uploaded";
assignment.Comments = "Completed";
//}
// You also could've just not used ViewDataUploadFilesResult
// at all, and just used assignment, only
// and just added fileSize, fileContents, etc. to it
EFModel db = new EFModel(); // this is your Entity Framework context
db.Assignments.Add(assignment); //"Assignments" would be your table
db.SaveChanges();
}
return RedirectToAction("Index");
//return View("Index", r);
}
}
return View();
}
附加模型
ViewDataUploadFilesResult.cs
public class ViewDataUploadFilesResult
{
public string Name { get; set; }
public string FilePath { get; set; }
public int Length { get; set; }
public HttpPostedFileBase FileObj { get; set; }
public byte[] Content { get; set; }
}
对我来说，不是使用整个 ViewModel，而是我的 Attachments 表的实际模型：
public partial class ITEM_ATCHMT
{
[Key]
public Guid ATCHMT_ID { get; set; }
public int ITEM_ID { get; set; }
[ForeignKey("ITEM_ID")]
public virtual ITEM item { get; set; }
[Required]
[StringLength(50)]
public string USER_NAME_DESC { get; set; }
[Required]
[StringLength(250)]
public string FILE_NAME_TXT { get; set; }
[Required]
public byte[] FILE_CNTNT_CD { get; set; }
[Required]
[StringLength(10)]
public string FILE_TYPE_DESC { get; set; }
public DateTime CREATED_DT { get; set; }
}
并说我想将它与这个项目相关联：
public partial class ITEM
{
[Key]
public int ITEM_ID { get; set; }
[Required]
[StringLength(50)]
public string NAME { get; set; }
}
要使用 Entity Framework 保存任何数据，您只需填充该模型，然后在您的上下文中执行 .SaveChanges()：
EFModel db = new EFModel(); // this is my Entity Framework context
ITEM item = new ITEM();
item.NAME = "My Item";
db.ITEM.Add(item); //"ITEM" is my table and name of an EF model, "item" is the object that represents my model
db.SaveChanges();
如果ITEM_ID 设置为自动递增：
ITEM_ATCHMT atchmt_model = new ITEM_ATCHMT();
atchmt_model.ATCHMT_ID = Guid.NewGuid();
atchmt_model.ITEM_ID = item.ITEM_ID // <-- this should have the ID
atchmt_model.USER_NAME_DESC = System.Security.Principal.WindowsIdentity.GetCurrent().Name;
atchmt_model.FILE_CNTNT_CD = r.Content;
atchmt_model.FILE_NAME_TXT = r.Name;
atchmt_model.FILE_TYPE_DESC = r.Name.Split('.')[1];
atchmt_model.CREATED_DT = DateTime.Now;
db.ITEM_ATCHMT.Add(atchmt_model); //"ITEM_ATCHMT" is my table
db.SaveChanges();