Hello,
In my WPF prism MVVM project im using dapper and after migrating DB from mysql to postgres, I started getting after login:
System.Windows.Markup.XamlParseException
with inner exception :
rgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Arg_ParamName_Name
However i found out that if I change couple of my data connection methods from async to sync, the program runs correctly.
Any suggestion what may be causing this exception? with mysql it worked fine async and with postgres it only works when i change it to sync.
Thanks :)
Jithu ThomasPosted Jan 22, 2024, 6:24 AM
The ArgumentOutOfRangeException with the message "Index was out of range. Must be non-negative and less than the size of the collection" is a common exception in scenarios where you are accessing an index in a collection, such as an array or a list, and the index you are trying to access is not within the valid range of the collection.
In the context of your WPF Prism MVVM project using Dapper and migrating from MySQL to PostgreSQL, it's unlikely that the change in the database system itself would directly cause this issue. However, the switch from synchronous to asynchronous database operations might be revealing a concurrency-related issue or a race condition in your code.
Here are some suggestions to troubleshoot and resolve the issue:
Review the Stack Trace:
Check Asynchronous Code:
Check Dapper Queries:
Review Database Connection Code:
Logging:
Update Dapper and Database Driver:
Consider Debugging Tools:
Consult Dapper and PostgreSQL Documentation: