C＃MVC問題，文件上傳

Question

我試圖讓我的MVC項目文件上載到服務器。我寫了我的課，

public class MyModule: IHttpModule 

which defines the event 

void app_BeginRequest (object sender, EventArgs e) 

In it, I check the length of the file that the user has selected to send. 

if (context.Request.ContentLength> 4096000) 
{ 
    //What should I write here, that file is not loaded? I tried 
    context.Response.Redirect ("address here"); 
    //but the file is still loaded and then going on Redirect. 
} 

Answer 1

在ASP.NET MVC中，您通常不會編寫http模塊來處理文件上載。您編寫控制器並在您編寫操作的控制器內部執菲爾哈克blogged有關文件上傳妮ASP.NET MVC：

你必須包含表單視圖：

<% using (Html.BeginForm("upload", "home", FormMethod.Post, 
    new { enctype = "multipart/form-data" })) { %> 
    <label for="file">Filename:</label> 
    <input type="file" name="file" id="file" /> 

    <input type="submit" /> 
<% } %> 

和控制器動作來處理上傳：

[HttpPost] 
public ActionResult Upload(HttpPostedFileBase file) 
{ 
    if (file != null && file.ContentLength > 0) 
    { 
     if (file.ContentLength > 4096000) 
     { 
      return RedirectToAction("FileTooBig"); 
     } 
     var fileName = Path.GetFileName(file.FileName); 
     var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName); 
     file.SaveAs(path); 
    } 
    return RedirectToAction("Index"); 
}