How to use __doPostBack()

You can try this in your web form with a button called btnSave for example: And in your code behind add something like this to read the value and operate upon it: Give that a try and let us know if that worked for you.

Sequence contains more than one element

The problem is that you are using SingleOrDefault. This method will only succeed when the collections contains exactly 0 or 1 element. I believe you are looking for FirstOrDefault which will succeed no matter how many elements are in the collection.

Could not find any resources appropriate for the specified culture or the neutral culture

I just hit this same exception in a WPF project. The issue occurred within an assembly that we recently moved to another namespace (ProblemAssembly.Support to ProblemAssembly.Controls). The exception was happening when trying to access resources from a second resource file that exists in the assembly. Turns out the additional resource file did not properly move references from … Read more

Format of the initialization string does not conform to specification starting at index 0

228 Check your connection string. If you need help with it check Connection Strings, which has a list of commonly used ones. Commonly used Connection Strings: SQL Server 2012 Standard Security Trusted Connection Connection to a SQL Server instance The server/instance name syntax used in the server option is the same for all SQL Server connection … Read more

Why is HttpContext.Current null?

Clearly HttpContext.Current is not null only if you access it in a thread that handles incoming requests. That’s why it works “when i use this code in another class of a page”. It won’t work in the scheduling related class because relevant code is not executed on a valid thread, but a background thread, which … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)