Question

Due to some reason I cannot change the query so I have to do this in C#.

I have a class:

public class myClass
{
    int id { get; set; }
    string name { get; set; }
    DateTime sDate { get; set; }
    bool status { get; set; } 
}

The data I am getting is fetched in this list. Now what I want is to remove those properties from a list that has null values. I may sound insane but you read it right. I thought of creating another list with only the selected properties, but any of the above properties can be null. So I have to devise a mechanism to filter my list based on this.

For more clarity consider the following example.

List<myClass> lstClass = some data source.

After getting the data the generic list(lstClass) looks like this.Consider the result set in a table:

Id Name Sdate status
1  a    null  null
2  b    null  null
3  c    null  false

Can i some how make my list look like this after removing the property sdate.
So the new list that I want to create should have only three properties.

Id Name status
1  a    null
2  b    null
3  c    false

Any ideas? Can I do this using Linq?

PS: This has nothing to do with presentation. I don’t have a grid where I am not able to hide columns that Is not what I am looking for.

Answer 1

Assuming you have a generic list of myClass instances, you can create an anonymous type with only the needed properties:

List<myClass> list = ...;
var reducedList = list.Select(e => new {e.id, e.name, e.status}).ToList();
// note: call to ToList() is optional

foreach (var item in reducedList)
{
    Console.WriteLine(item.id + " " + item.name + " " + item.status);
    //note: item does not have a property "sDate"
}