If you are using IIS(Internet Information Services) for hosting your web application, then the default upload file size is 4 MB. To increase it, please copy following code in your web.config.
<configuration> <system.web> <httpRuntime maxRequestLength="1048576" /> </system.web> </configuration>
If you are using IIS7 or above version then add following code in your web.config
<system.webServer> <security> <requestFiltering> <requestLimits maxAllowedContentLength="1073741824" /> </requestFiltering> </security> </system.webServer>