Use Extended Rest Functions Like Contains In Dynamics Crm

As I noticed, fetching data in Dynamics CRM with REST is a lot faster then with SOAP especially for big data. Since I'm new to this topic (REST) I want to ask if it's necessary to

Solution 1:

You cannot use the C# QueryExpression functions in Odata Queries directly. You have to modify them according to Odata Syntax/Functions.

Please change your query to below and try again:

select=*&$filter=substringof('Test',Subject)&$top=10

A very good tool to generate complex Odata Queriesis Dynamics XRM Tools

Adding Selection Criteria to REST Queries in CRM 2011