因用了NeatUpload大文件上传控件而导致Nonfile portion > 4194304 bytes错误的解决方法

NeatUpload是一个开源的大文件上传控件，非常的强大，支持文件类型过滤、上传进度条显示、多文件上传等强大的功能。

但部署至项目后，有些地方用普通的FileUpload上传时却发生了一个错误（Nonfile portion > 4194304 bytes，文件大于默认值4M），因如果用NeatUpload控件及需要显示上传进度条的话，得在web.config中加入如下代码：

<httpModules>

<add name="UploadHttpModule" type="Brettle.Web.NeatUpload.UploadHttpModule, Brettle.Web.NeatUpload"/>

</httpModules>

这时全站都会默认使用此httpModule，当你使用FileUpload上传文件时，只要是超过4M（默认的）的都不能上传，就算你配置了<httpRuntime maxRequestLength="400000" executionTimeout="3600"/>都没用，还是会出现Nonfile portion > 4194304 bytes的错误的。

解决方法如下：

1、在<configuration>里面加入以下代码：

<configSections>

<sectionGroup name="system.web">

<section name="neatUpload" type="Brettle.Web.NeatUpload.ConfigSectionHandler, Brettle.Web.NeatUpload" allowLocation="true" />

</sectionGroup>

</configSections>

2、在<system.web>节中插入以下代码（此方式是全局性的，第3种为针对某页面）：

<neatUpload useHttpModule="true" maxNormalRequestLength="40960" maxRequestLength="2097151" defaultProvider="FilesystemUploadStorageProvider">

<providers>

<add name="FilesystemUploadStorageProvider" type="Brettle.Web.NeatUpload.FilesystemUploadStorageProvider, Brettle.Web.NeatUpload"/>

</providers>

</neatUpload>

此方法是修改属性maxNormalRequestLength的值为40960（40M），如果将useHttpModule改为false则无所谓。

3、在<configuration>里面的后面位置加入以下代码（此方式是针对某一页面）：

<location path="UploadFile.aspx" ><!--上传文件的页面路径-->

<system.web>

<neatUpload useHttpModule="true" /> <!--为true则代表使用neatUpload的httpModule，false为不使用-->

<httpRuntime maxRequestLength="40960" executionTimeout="3600" useFullyQualifiedRedirectUrl="true" /> <!--允许最大为40M-->

</system.web>

</location>

neatUpload节点的相关属性介绍如下：

<neatUpload

useHttpModule="true or false, defaults to true"

maxNormalRequestLength="up to 2097151 in KBytes, defaults to 4096"

maxRequestLength="up to 2097151 in KBytes, defaults to 2097151"

maxUploadRate="rate in KBytes/sec, defaults to -1 which means unlimited"

postBackIDQueryParam="parameter name, defaults to NeatUpload_PostBackID"

multiRequestUploadHandlerUrl="URL that handles the requests in a multi-request upload,defaults to ~/NeatUpload/MultiRequestUploadHandler.ashx"

debugDirectory="directory to which debug info should be written, defaults to none"

decryption="name of the SymmetricAlgorithm to use to encrypt/decrypt protected data, defaults to .NET default algorithm used by SymmetricAlgorithm.Create()"

validation="name of the HashAlgorithm to use to validate protected data, defaults to .NET default algorithm used by HashAlgorithm.Create()"

decryptionKey="32 hex-digit key used to encrypt/decrypt protected data, defaults to auto-generated for each app instance"

stateMergeIntervalSeconds="secs between merges of the current and stored upload states,defaults to 1"

stateStaleAfterSeconds="secs before an unchanged upload state can be removed from the store, defaults to 60"

defaultStorageProvider="friendly name,defaults to a FilesystemUploadStorageProvider with default temp dir"

defaultStateStoreProvider="friendly name, defaults to a AdaptiveUploadStateStoreProvider"

>

<providers>

<add name="friendly name" type="type derived from Brettle.Web.NeatUpload.UploadStorageProvider" />

</providers>

</neatUpload>

官方下载和帮助文档：http://neatupload.codeplex.com/