Increase File Upload Size Iis 6

 

Overcomming IIS 6 File Upload/Download File Size Limits. Search for AspMaxRequestEntityAllowed and increase the value. The default value is 204800 (200K). Increase IIS File Upload Limits. IIS 7.5 has a max size of 2GB. ( bytes) Next, if you have URLScan installed on the server, the MaxAllowedContentLength. In the case of IIS 6.0: Important! The maximum file upload segment size for both ASP.NET 2.0 and ASP.NET 4.0 is 2097151Kb = 2Gb. To upload files over 2Gb, you need the client application with resumable upload support. If you need to upload files larger than 2Gb you must implement resumable upload interfaces and upload files with segments.

To increase the file download size limit, repeat all steps above but in Step 3 find the parameter called AspBufferingLimit. The default download limit is 4MB. The default download limit is 4MB. By default Windows 2003 server limits file uploads to about 200KB in size. To overcome this limit you must edit the IIS metabase.xml file. Before you can edit the metabase.xml file you must tell IIS to allow you to edit the file. In IIS, right click the name of the server and select properties. Check “Enable Direct Metabase Edit”. Uploading large file to IIS 7.5 or 8 using file input element. File-download-and-upload-maximum-size-limits.aspx If you try to upload more than 4 GB. Increasing the maximum upload size for files in DotNetNuke is easy to do when you know where to look. Watch this video for instructions, and check out http://bit.ly.

18 Apr 2013CPOL
This tip discusses the method to allow the uploading of large size files in ASP.NET

Introduction

Increase File Upload Size In Wamp

We all must have obviously uploaded files somewhere or the other. Even in the websites that we create using ASP.NET, we might have to put the asp:fileupload control to facilitate file upload feature. But in some cases, while developing websites or web applications, we might come across requirements that specify: Allow users to upload large files (file size typically greater than 10MB). This tip shows how one can facilitate the upload of large files in ASP.NET.

Uploading Large Files

Iis File Size Limit

In a scenario where user has to have the ability to upload large files, just putting a file upload control in our website isn’t sufficient. The reason is, the upload file size limit is set to 4MB by default in ASP.NET.

To allow large files to be uploaded in our website, we need to make a few configuration changes. The '<httpRuntime>' tag in the web.config file is where we need to change the file size limit.

The <httpRuntime> tag has an attribute 'maxRequestLength' whose value is specified in 'KiloBytes'. Also, increase the value of the 'executionTimeout' attribute of the same tag so that the uploading doesn’t time out before the entire file has been uploaded.

The tag would look something like this:

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This would allow for files upto 2GB to be uploaded. I have discussed this scenario more clearly in this post

Next, we need to make changes at the IIS level. We have to increase the values of specific attributes in the IIS Metabase.

The Metabase.xml file is the one we need to update to allow large files to be uploaded. This file is located at

C:WindowsSystem32inetsrv

location.

But this file is by default in Read-Only mode.

Procedure to make Metabase.xml editable: (FOR IIS 6.0 only)

  1. Open IIS manager (open Run -> type ‘inetmgr’ -> press enter)
  2. Right-click on the local computer name. Click on Properties.
  3. Enable the Checkbox that reads 'Enable Direct Metabase Edit'.
  4. Click on Apply. Then OK.

Iis Max Upload Size

The above procedure is only for IIS 6.0 as in IIS 7.0 and above, microsoft has removed the Enable Direct Metabase Edit option. I’ll come back to that later.

So, after the Metabase.xml file has been made editable, navigate to the file location. Its better to take a back up of the file before modifying it (just to be on the safe side). The attributes to be modified are:

  1. AspBufferingLimit
  2. AspMaxRequestEntityAllowed

The values of both the attributes are specified in 'BYTES'. Be careful about the units in which the values of these attributes are specified.The ones in IIS Metabase take values in BYTES. The one in the web.config file takes values in KILOBYTES.

Modify the values in the above attributes and save the file. Technically, your website should allow the filesize that you've specified. But in my case, the website wasn't allowing files more than 49MB. I'm still yet to find out the reason for that. If there is any other way of allowing files greater than 49MB to be uploaded, please do share the same.

Another thing I would like to add to this is that if you are using web service to upload the file to an external database, then you will have to update the binding configuration of the services as well.

When we add a service reference to our website, the corresponding service binding information is added to the web.config file in the website. To allow large files to be uploaded, the attributes in the binding information to be modified are:

  1. maxBufferSize
  2. maxReceiveMessageSize
  3. maxBufferPoolSize
  4. maxDepth
  5. maxStringContentLength
  6. maxArrayLength

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Iis File Upload Timeout

Summary

Increase File Upload Size Iis 6

So, to summarize the above tip, the three steps you need to perform to allow large file uploads in your ASP.NET website/application are:

  1. Update <httpRuntime> tag. That is, update the values in maxRequestLength and executionTimeout attributes.
  2. Make the Metabase.xml file editable. Update the AspBufferingLimit and AspMaxRequestEntityAllowed attributes with required large values.
  3. [Optional] If using web services in uploading the files, then make sure you update the above 5 attributes in the binding configurations as well.

Please feel free to comment or make any corrections if required anywhere.

Hope this helps!

Iis File Upload