How do I convert httppostedfilebase to httppostedfile in C#? Here is my demo code sinppet:
...I am developing online learning portal in ASP.NET MVC web-application and I want develop video conference featue inside web-app.
Please help me in creating this application, because I am new in web-development.
...When I am trying to save Updated data in table using Entity Framework in ASP.NET MVC, I am getting the below error
...I am trying to add List.GroupBy(a=>a.ProductType.Name).Select(a=>a.FirstOrDefault()), now here I can have null values for .ProductType or .name so how can I ignore null values in C#, so I can get proper results of GroupBy?
If I am using above query in C#, I am getting error
Object reference not set to an instance of an object
I tried to make it like List.GroupBy(a=>a.ProductType != null ? a.ProductType), but it doesn't work.