如何在c#.net Windows中限制上传的大小 [英] how to restrict the size of upload in c#.net windows

问题描述

我要以byte []的形式将图像上传到数据库.我需要限制上传的大小，例如5mb，这是如何在c#窗口中以编程方式实现的.

问候，
sajith

iam uploading images to the database as byte[].i need to restrict the size of upload say 5mb how it is possible in c# windows programically.

Regards,
sajith

推荐答案

您需要在web.config文件中应用设置.它会影响整个应用程序，但是...我不认为您可以为每页设置它.

You need to apply the setting in your web.config file. It affects the entire application, though... I don''t think you can set it per page.

<configuration>
  <system.web>
    <httpRuntime maxRequestLength="xxx" />
  </system.web>
</configuration>

xxx为KB.默认值为4096(= 4 MB).

xxx is KB. The default is 4096 (= 4 MB).

使用5242880
检查图像字节数组的长度.

Check image byte array length with 5242880

if(ImageArray.Length > 5242880)
{
//Display error message.
}
else
{
//Upload image byte array.
}

public bool Limit(string path)
 { const int limit = 5;
 float size = ToByteArray(path).Length / 1024f / 1024f; 
if (size > limit)
 { SendMessage("Uploading Limit Exceeds");
 return false; } 
return true; }

public byte[] ToByteArray(string path)
 { byte[] buffer = File.ReadAllBytes(path); return buffer; }

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