使用ASP.NET MVC将文件上载到数据库中

Question

我想在我的表单上提供一个工具,供用户上传文件并保存在数据库中.如何在ASP.NET MVC中完成.

在我的模型类中写入什么DataType.我试过Byte[],但在脚手架中,解决方案无法在相应的视图中为它生成适当的HTML.

这些案件是如何处理的？

Answer 1

您可以byte[]在模型上使用a ,HttpPostedFileBase在视图模型上使用a .例如:

public class MyViewModel
{
    [Required]
    public HttpPostedFileBase File { get; set; }
}

然后:

public class HomeController: Controller
{
    public ActionResult Index()
    {
        var model = new MyViewModel();
        return View(model);
    }

    [HttpPost]
    public ActionResult Index(MyViewModel model)
    {
        if (!ModelState.IsValid)
        {
            return View(model);
        }

        byte[] uploadedFile = new byte[model.File.InputStream.Length];
        model.File.InputStream.Read(uploadedFile, 0, uploadedFile.Length);

        // now you could pass the byte array to your model and store wherever 
        // you intended to store it

        return Content("Thanks for uploading the file");
    }
}

最后在你看来:

@model MyViewModel
@using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
    <div>
        @Html.LabelFor(x => x.File)
        @Html.TextBoxFor(x => x.File, new { type = "file" })
        @Html.ValidationMessageFor(x => x.File)
    </div>

    <button type="submit">Upload</button>
}