What is the meaning of this Linq Query?

Question

1.00/5 (1 vote)

See more:

XML

Enum.GetValues(typeof(Gender)).Cast<Gender>().Select(c => new SelectListItem {
 Text = c.ToString(),
 Value = c.ToString()
}));

Here Gender is an Enum.

Please explain me what is this statement doing with each step by step.

Thanks

Posted 4-Dec-14 4:10am

Sumit Bhargav

Add a Solution

Comments

[no name] 4-Dec-14 10:21am

This converts a enumeration by casting it to the Type gender to a List of or a single SelectListItem.

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2014-12-04T04:36:00

Once you remove the final close bracket to get it to compile...

Enum.GetValues returns an array of the values in the enum: so if teh enum was:

C#

public enum Gender
    {
    Male = 1,
    Female = 2,
    Bieber = 666,
    }

Then it would return an array of three integer values: 1, 2, 666
These it then casts to an IEnumerable of Gender class items, and uses Select to convert each of those into a new SelectListItem instance and finally results in an IEnumerable of those.
It's the equivalent of this code:

C#

List<SelectListItem> list = new List<SelectListItem>();
foreach (int i in Enum.GetValues(typeof(Gender)))
    {
    Gender g = (Gender)i;
    SelectListItem item = new SelectListItem();
    item.Text = g.ToString();
    item.Value = g.ToString();
    list.Add(item);
    }
IEnumerable<SelectListItem> returnValue = list;