How to solve the 'Element' is an invalid XmlNodeType error

Hi, I solved myself with the help of Virtual lab. It was a very small mistake which i made. The solution is after adding the shoppingcart webpart, go to the configuration settings. There is an option called "Disable viewstate". unfortunately i made it as true. since i made v...

Thank you for the hints. They were very interesting, but in my case not the answer. I found the failure and it was mine. In the template I’ve use was an hidden input field named as viewstate and contained some nonsense datastring. After removing this field all seems ...

Hi, I know that Helena sent you a message already, I will post the solution here for other users as well: You could save the datasource to the ViewState property. Please try this code: using System; using System.Web; using System.Web.UI; using CMS.PortalControls;...

Hello, I am trying to set value to state aginst a button click and get a value from another button click. It is just shocking that I was unable to meet this reqirement when creating custom webpart.I have seen many people are getting issues with viewstate. Can you please loo...

Two interesting web parts by Interesting Pty Ltd

Error message: Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

I had a fully functional custom filter web part built. I used the example in the developer guide under Development > Web parts > Data source web parts: Developing custom filters Over the weekend, I installed a hotfix and am now at v7.0.49. Now the custom filter is not f...

Hi, I added a SearchResults web part to a page template using the Portal design mode. I now need to delete this web part from the page. When I click 'Remove' in the Design tab, I get the following error: Server Error in '/' Application. Failed to load viewstate. The c...

[Problem picture](https://i.stack.imgur.com/0Sec0.png) I use Visual Studio 2019 to run. I don't know how to add domain name in web.config.