在asp.net mvc 页面里上传大文件到服务器端，需要如下步骤：
1. 在Control类里添加get 和 post 方法
// get method
public ActionResult Upload()
{
return View();
} // This action handles the form POST and the upload
[HttpPost]
public ActionResult Upload(HttpPostedFileBase file)
{
// Verify that the user selected a file
if (file != null && file.ContentLength > )
{
// extract only the fielname
var fileName = Path.GetFileName(file.FileName);
// store the file inside ~/App_Data/uploads folder
var path = Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
file.SaveAs(path);
}
// redirect back to the index action to show the form once again
return RedirectToAction("Upload");
}
2. 创建view页面，并且添加如下代码：
@using (Html.BeginForm("Upload", "Home", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<input type="file" name="file" />
<input type="submit" value="OK" />
}
3. 在Web.config里做如下添加和修改：
在<system.web>里添加
<httpRuntime targetFramework="4.5" maxRequestLength="1048576" executionTimeout="3600"/>
并且在<system.webServer>里添加
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="1073741824" />
</requestFiltering>
</security>
大功告成！
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