C#中文件大小服务器端的限制 [英] Limit on a file size server side in C#

问题描述

我当前正在MVC4中上传文件，但是在我的控制器中，我试图将文件大小限制为最大4MB，但收到以下警告

I am currently uploading files in MVC4 but in my controller I tried to limit the file size to 4MB max but got the following warning

comparison to integral constant is useless

使用 Haacks 示例

[HttpPost]
public ActionResult Upload(HttpPostedFileBase file)
{
if (file.ContentLength > 0)
{
if (file.ContentLength < 4000000000 )
{
   var fileName = System.IO.Path.GetFileName(file.FileName);
   var path = System.IO.Path.Combine(Server.MapPath("~/App_Data/uploads"), fileName);
   file.SaveAs(path);
 }

运行代码时出现错误

Maximum request length exceeded.

由于file.ContentLength是int，我无法控制它，所以不知道如何解决.谁能帮助我限制服务器端的文件大小.

Since file.ContentLength is an int over which I have no control I do not know what is the way around this. Can anyone help me on how to limit the file size server side.

编辑对于可能要指出4000000000是4gb的人来说，您是正确的.但是，即使我将其替换为4000000，我的操作也会成功完成，但不会保存文件，因为我的If()不满意，即file.ContentLength < 4000000返回false.

Edit To those that might want to point out that 4000000000 is 4gb you are correct. But even if I replace it with 4000000 my action completes sucessfully but does not save the file as my If() is not satisfied i.e file.ContentLength < 4000000 returns false.

编辑这不是一个重复的问题，我想将文件大小限制为一定的限制，而不忽略IIS中的文件大小限制.

Edit This is not a duplicate question I want to limit my file size to a certain limit not ignore the file size limit in IIS.

推荐答案

在您的web.config中设置此值

Set this value in your web.config

<httpRuntime maxRequestLength="4096"/>

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