Question

I am creating C# winforms application, which connects to the Database.
Because I have a many records in database, I want to filter data on sql side (Filter must have many options without start/end date).

What is a best way to achive this?

I know I can use BindingSource for filtering, but I think It is not recomended, because in this case I must select all data from database.

p.s. Sorry for my poor English.

Answer 1

You should always prefer filtering data on database instead of bringing unwanted data to your application and filtering with code.

Eg

string query = "SELECT * FROM MyTable ";

In the string below you add a WHERE clause and pairs of column = value or column = expression

 string query = "SELECT * FROM MyTable WHERE column1=somevalue AND column2 > somevalue AND ...";