Linq is not null in where clause

Posted: 6 days ago Given below is the syntax of Where clause. I need some sample code for my project. I created a function which accepts 3 parameters, inside that function I am executing a LINQ lambda expression query , returning a list.

Selecting single xmlNode by multiple conditions. How to give multiple where condition using linq query in MVC.

LINQ sum having if condition. For better help, I move it to ADO. NET Entity Framework and …. Lambda expression: Query expression: Print to screen: Result:. StartsWith "A" Where x. EndsWith "a" This is how we can use linq where clause filtering operator to filter data based on conditions. Posted: 1 week ago C Linq : Combine multiple. Simple Where clause. Double and multiple joins. The following sample shows how to retrieve information from account, contact and lead where the contact is the primary contact for the In this section, you will learn some complex LINQ queries.

We will use the following Student and Standard collection for our queries. Multiple Select and where operator. Example: Multiple Select and where Operator. Where Function fruit fruit. Dim output As New System. AppendLine fruit Next Console. WriteLine output. ToString ' This code produces the following output: ' ' apple ' mango ' grape. EmployeeId but still it is not taking it. Maciej Los 8-Jul pm. How should i know if do not see your database structure and data?

ToList ;. I know with out knowing DB structure it's tough , Thank you for your help so far. ToList ; Sorry, but posting one last time if you can see any mistake please let me know. These are two queries I am using but code is breaking at second one when it is executing. Is there anything wrong here? Thank you so much.. Maciej Los 9-Jul pm. How could i know? Posted 9-Jul am chinnuTest. Add your solution here. OK Paste as. Treat my content as plain text, not as HTML. Existing Members Sign in to your account.

Active Oldest Votes. IsNullOrEmpty p. Why bother using IsNullOrEmpty rather than a simple null test? An empty string doesn't start with D , so it should give the same results, and it's a more general approach that works for all nullable types, not just string.

JonSkeet Probably a force of habit. Just check for null first, just as you would if you were writing normal C code in a loop. StartsWith "D" If p itself can be null i. StartsWith "D" ; Query expressions are really beneficial when the query gets complicated - particularly with joins and grouping. Jon Skeet Jon Skeet 1. Sign up or log in Sign up using Google. Write value ; 39 Console. Write buffer, index, count ; 45 Console. Equals e. Great article. It is very important for developers new to LINQ to understand these ramifications.

Thanks for demonstrating how the underlying code differs based on column type.