SQLite equivalent to ISNULL(), NVL(), IFNULL() or COALESCE()
IFNULL, see here: http://www.sqlite.org/lang_corefunc.html#ifnull no brackets around the function
.net
What is The difference between ListBox and ListView
A ListView is basically like a ListBox (and inherits from it), but it also has a View property. This property allows you to specify a predefined way of displaying the items. The only predefined view in the BCL (Base Class Library) is GridView, but you can easily create your own. Another difference is the default selection mode: it’s Single for a ListBox, but Extended for a ListView
How to empty a list in C#?
It’s really easy:
How to solve “Could not establish trust relationship for the SSL/TLS secure channel with authority”
As a workaround you could add a handler to the ServicePointManager‘s ServerCertificateValidationCallback on the client side: but be aware that this is not a good practice as it completely ignores the server certificate and tells the service point manager that whatever certificate is fine which can seriously compromise client security. You could refine this and do some custom checking (for … Read more
What is the purpose ApplicationDbContext Class in (under IdentityModels.cs file) ASP.NET MVC 5?
Assuming you’re talking about an asp.net-mvc-5 application: For the default templates, ApplicationDbContext is used for all the ASP.NET Identity database CRUD operations. If you don’t know whats an Entity DBContext is, consider reading this guide.
Connection string using Windows Authentication
Replace the username and password with Integrated Security=SSPI; So the connection string should be
Best way to repeat a character in C#
What about this: Where n is the number of times you want to repeat the string. Or better:
Warning: Found conflicts between different versions of the same dependent assembly
This warning means that two projects reference the same assembly (e.g. System.Windows.Forms) but the two projects require different versions. You have a few options: Recompile all projects to use the same versions (e.g. move all to .Net 3.5). This is the preferred option because all code is running with the versions of dependencies they were … Read more
Calling the base constructor in C#
Modify your constructor to the following so that it calls the base class constructor properly: Note that a constructor is not something that you can call anytime within a method. That’s the reason you’re getting errors in your call in the constructor body.
How should I cast in VB.NET?
Those are all slightly different, and generally have an acceptable usage. var.ToString() is going to give you the string representation of an object, regardless of what type it is. Use this if var is not a string already. CStr(var) is the VB string cast operator. I’m not a VB guy, so I would suggest avoiding it, but it’s not … Read more