Entity framework select() hide the data

Question

0.00/5 (No votes)

See more:

i try to select all unique (expired dates) with distinct() :

gridView3.Columns[0].FieldName = "pis_ExpireDate";

var EXdates = DB0201.purchases_item_seriels.Where(u => (u.stitems_ID == ItemID && u.ss_StoreID == StoreID && u.pis_Statues == 0) ||
                                                                                (u.stitems_ID == ItemID && u.ss_StoreID == StoreID && u.pis_Statues == 5) ||
                                                                                (u.stitems_ID == ItemID && u.ss_StoreID == StoreID && u.pis_Statues == 6))
                                                                                .OrderBy(o => o.pis_ExpireDate).Select(u => u.pis_ExpireDate).Distinct(); 

    gridControl3.DataSource = EXdates.ToList();

rows created but no data appears!!

What I have tried:

i tried to select all data without Select(u => u.pis_ExpireDate) , it work

gridView3.Columns[0].FieldName = "pis_ExpireDate";

var EXdates = DB0201.purchases_item_seriels.Where(u => (u.stitems_ID == ItemID && u.ss_StoreID == StoreID && u.pis_Statues == 0) ||
                                                                                (u.stitems_ID == ItemID && u.ss_StoreID == StoreID && u.pis_Statues == 5) ||
                                                                                (u.stitems_ID == ItemID && u.ss_StoreID == StoreID && u.pis_Statues == 6))
                                                                                .OrderBy(o => o.pis_ExpiraeDate);
    gridControl3.DataSource = EXdates.ToList();

rows created and all data appear but without merge

Posted 25-Nov-18 23:54pm

Golden Basim

Updated 29-Nov-18 9:40am

v2

Add a Solution

Comments

F-ES Sitecore 26-Nov-18 6:10am

With your first query you are selecting a list of a single field (pis_ExpireDate) so it'll be a list of whatever type that is (DateTime or whatever). In the second query you are returning a list of purchases_item_serial objects. I assume you actually want a list of distinct purchases_item_serial objects and not just a list of dates. Update the question to provide a sample of your data and what your desired output is.

Golden Basim 26-Nov-18 6:50am

i need to show only list of expired dates in Gridview , i use this line to define the first column field name :
gridView3.Columns[0].FieldName = "pis_ExpireDate";

F-ES Sitecore 26-Nov-18 6:58am

You're creating a list of DateTime variables so there is so such thing as a field called pis_ExpireDate, that's just the property the data originally came from. You'll probably need to do something like this;

Select(u => new { pis_ExpireDate = u.pis_ExpireDate })

that will create a list of anonymous objects with a property called pis_ExpireDate so your gridview will be able to reference the data by property name. The Distinct might stop working though as it has no way of working out if the objects are distinct, you might need to google how you can do a custom Distinct for your objects.

Golden Basim 26-Nov-18 11:26am

thank you , it work after changing to .Select(u => new { u.pis_ExpireDate }) thanks

ZurdoDev 29-Nov-18 15:37pm

Please post as solution.

Richard Deeming 27-Nov-18 12:25pm

You could simplify that Where filter a bit:

var EXdates = DB0201.purchases_item_seriels.Where(u => u.stitems_ID == ItemID 
    && u.ss_StoreID == StoreID 
    && (u.pis_Statues == 0 || u.pis_Statues == 5 || u.pis_Statues == 6))
    ...

Or even:

int[] expiredStatuses = { 0, 5, 6 };
var EXdates = DB0201.purchases_item_seriels.Where(u => u.stitems_ID == ItemID 
    && u.ss_StoreID == StoreID 
    && expiredStatuses.Contains(u.pis_Statues))
    ...

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)

Golden Basim · Answer 1 · 2018-11-29T09:40:00

Solution 1

thank you , it work after changing to

.Select(u => new { u.pis_ExpireDate })

Posted 29-Nov-18 9:40am

Golden Basim