Dynamically Entering "select" by a string in LINQ Query-CodePudding

 List<int> list = new List<int> { 1, 2, 4, 5, 6, 7 };
           string selectQuery = "x";
            var result = from x in list
                         where x > 3
                         select selectQuery;

This code will return "xxxx", I want it to return 4 5 6 7.

I want to enter the select dynamically by a string but this code returns the string. I got a table of conditions, for each condition I want to use a LINQ Query, so I put the select statement in a string table and I want to apply it for each one.

CodePudding user response：

This is because you are selecting (returning) the selectQuery variable for each item.

Try this:

var result = from x in list
             where x > 3
             select x;

This will return each item of the original list that matches the condition in the where clause.

CodePudding user response：

Try this: Just convert your select query string into a integer, and filter the list with that value:

List<int> list = new List<int> { 1 ,2 ,4 ,5 ,6 ,7 };
            string selectQuery = "2";
            var result = from x in list
                         where x>Convert.ToInt32(selectQuery)
                         select x;

//other way can be

 list.Where(x=>x>Convert.ToInt32(selectQuery)).ToList()

With this way you can do the query with a dinamic value in the string select query.