Validating date in asp net
Hopefully, you have a working solution at this point and you can go and customize it for your own project.
If you have missed something or you are stuck somewhere in between please download the complete source code of the Custom Validation Attribute Demo project by clicking the Download Source Code button at the top of the page.
Try Open(Task Completion Source`1 retry) at System.
These attributes are written out because of the Model Client Validation Rule you’ve put together.
If you are logged in as Administrator setup will run and you will be able to see this page even if it is disabled in Web.config so you can easily leave it disabled and just login before upgrading.
When you need to upgrade, you can set this back to false.
The Get Client Validation Rules method that you need to implement has one simple function.
Using the metadata parameter, you are required to construct one or more Model Client Validation Rules which are returned from the method and used by the framework to output the client-side HTML5 data-* attributes that are necessary for client-side validation.