File Upload length limit

Solution: Modify the Web. config file

1. Note that there are two Web. config files in MVC , such as one under views, which are used to control the files in the view, and one in the root directory, which works on all files. We modify the root directory under Web. config

2. Modify maxRequestLength: In Web. config We modify the maxRequestLength in <system.web></system.web> to indicate the maximum request length, in kilobytes, Default 4M

<system.web>     <!--maximum request length in kb-->     
3, modify maxAllowedContentLength: In the Web. config we modify <system.webServer></system.webServer> The maxAllowedContentLength, which represents the maximum attachment size, is in bytes and defaults to about 30M
<system.webServer>    <!--allow file length to be uploaded, in bytes---    <security>      <requestFiltering>        <requestlimits maxallowedcontentlength= "20971520"/>      </requestFiltering>    </security> </system.webServer>
Attention:
the difference between maxRequestLength and maxAllowedContentLength :
A, the former represents the request length, the latter indicates the size of the upload file;
b, the former unit KB, the latter unit bytes;
C, the former default value of 4M, the latter default value of 30000000B, about 30M;
D, the maximum value of both is 2G
File Upload length limit