Filter A List With Linq?
May 3, 2011Public Sub adjectAllNormals()
Dim qry As LinkedList(Of CElement) = From elm In Elements
From id In SelectIDs()
Where elm.ID = id
Console.WriteLine(qry.Count)
End Sub
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Linq To Entities, Filter Using Where And A List Of Stings?
Nov 2, 2011I am trying to write a query for an existing database, I am using LINQ on EF3.5 inside VS2008 as that is the only environment available to me.I have a starter query that gives me a list of items so the user can select what they want.
"e.Result =
From c In MLDb.TBL_FeatureInfoSet
Order By c.INSP_ROUTINE_NM
Select c.INSP_ROUTINE_NM
Distinct"
The user can then select from the list one or several items they are intersted in and i want to use these as the filter in a further database call. It's not then difficult to have a where to filter on one string however, I would also like to be able to allow the user to select several items from the list box and the data for all of those to be returned.
[Code]...
.net - LINQ Query For Filter By Selected Items In Checkbox List?
Jun 30, 2011Could not find this through Google or in SO questions.I have a checkbox listbox on my form. I want to filter my List by the list of selected Ids from that listbox that are checked, in SQL I would have done this like "Where TypeId In (1, 4, 5, 7)"... how do I do that in LINQ?
I feel like I am missing a really obvious answer, but cannot get it.
For argument sake... here is the what I have for sample data:
In Colors (List<of currentColors>)
ID, Name, TypeId
1, Red, 1
2, Blue, 1
3, Green, 2
4, Pink, 3
Selected Types 2 and 3 in CheckboxList: filteredColors
[Code]...
How To Get Lamda In LINQ To Actually Filter For Dynamic Linq
Sep 10, 2009Example-I have a person class
Public Class Person
Private _fname As String
Public Property Fname() As String
[Code]...
Linq To Sql Time Filter
Jul 12, 2011I'm trying to filter out the time which is greater than 8:00 am and store it in array . Can anyone give me some suggestion?[code]
View 1 RepliesFilter Out Item From A Linq 2 Sql Query?
Oct 1, 2009I have a list(of t) and I got a iqueryable(of a)
I want to filter out any item from the iqueryable(of a) where a.id = t.myotherid
I'm not really sure how to write this query[code]...
Linq To Read And Filter Xml Files
Dec 11, 2008I am trying to grasp using Linq to read and filter xml files. I've been googling and trying all day long but still not successful.[code]
1. Firstly I want to select a contact with a certain node value, my code looks like this:[code]
2. The third level nodes have some same descedants child elements. Is it possible to sort the entries by <contactId>? How can I do that? For example I want to have a result like this:[code]
Send LINQ Filter As Parameter?
Oct 4, 2010Imagind I have the following in VB:
function doSomething()
From ou In ctxt.Users.Where(Function(p) p.UserName = username)
...
end function
how can I send the filter as parameter (something like below)?
function doSomething(filter as whatTypeHereAndHowToInstantiateInCallingFunction)
From ou In ctxt.Users.Where(filter)
...
end function
Pass Property To Create Filter Like LINQ?
Jan 6, 2011I`m looking for a way to parse a parameter name like linq does.I want to filter before i download the date from the database.With LINQ the data is already red into a dataset. I only want to select data from the database witch i need. how i can send a property name to a function without using the property name as string and without to use to mutch code inside the function and without creating an instance of the object, etc.
Module
Module1
Dim user
As user =
[code]....
VS 2008 How To Pass A LINQ Query To A Sub And Filter It
Feb 6, 2010I have a LINQ query:[code]How can I pass "MyField" to the Sub and make the LINQ "Where" clause work?
View 2 RepliesVS 2010 Using LINQ To Filter Data From A Datatable?
Sep 1, 2010I am wondering if it is possible to filter data from a datatable.Sample datatable
Quote:
Sno CatID Nos
1 XYZ 25
[code].....
Cannot Filter A Binding Source Based On A Linq Query
Feb 3, 2010I've got a datacontext and created a binding source using LINQ to sql but cannot filter said bindingsource. The supportsfilter of the bindingsource is set to false ? why ? I can't find any info to say that I cannot filter a binding source based on a linq query.[code]
View 3 RepliesLinq Inheritance And Subtypes (filter Out Base Type)
Nov 8, 2010OK I have a base query that is returning a list (ObjectQuery, actually but I don't think it matters) I have about 5 subtypes based on the main type and I need to filter them. Everything works fine until I want the results to be of the main type (not a subclass) Basically I have a query that includes everything, then I filter out the types that are not checked in a checkedbox list. (asp.net) Lets say I have an Entity named Task, and SubTask1 and SubTask2 that inherit from Task
[Code]...
VS 2008 - Create A Linq Filter To Select Only Unique Records For TableName + PKs
May 22, 2011Basically i have a list(of TransRecord)
vb Public Class TransRecord
Public TableName As String
Public PKs As String
[CODE]...
And want to create a linq filter to select only unique records for TableName + PKs (group by) ... but want it to select only the record with the highest ID for this group by.
Convert A List Linq Expression To Defined List Class?
May 26, 2012y have this class
Private Class MyClass
Public Property propertyOne() as String
Public Property propertyTwo() as String
[code].....
.net - Create New Distinct List(of T) From Existing List(of T) Using LINQ?
Jun 1, 2011How can I get a new distinct list from an existing list using LINQ? This is what I have so far and it is not distinct but does give me a new list.
Dim tmpQryColumn = (From a In _allAudits
Select New CheckBoxListItem
With {.Id = a.AuditColumn, .Name = a.AuditColumn}
).Distinct()
_columnList = New List(Of CheckBoxListItem)(tmpQryColumn)
.net - Searching A List Of Objects In An Object List Using Linq?
Dec 22, 2010I have 2 classes
Public Class Shipper
Public Property ShipperID As Long
Public Property CreateDate As DateTime
[Code].....
Create New Distinct List(of T) From Existing List(of T) Using LINQ?
Mar 12, 2010How can I get a new distinct list from an existing list using LINQ? This is what I have so far and it is not distinct but does give me a new list.
Dim tmpQryColumn = (From a In _allAudits
Select New CheckBoxListItem
With {.Id = a.AuditColumn, .Name = a.AuditColumn}
[code]......
Finding Items In One List That Aren't In A Second List Using Linq
Jan 25, 2011I have two generic lists, named ListA and ListB. Both ListA and ListB could potentially have duplicate items. What I would like to do is use LINQ to grab the items in ListB that are not in ListA, but I'm unsure how to do so.
View 8 RepliesLinq - Create A List Of Integers From A List Of Objects?
Nov 23, 2011I'm trying to create a list of days(integer) from a list of dates(date).
I tryed to do this....
[Code]...
Loop Against A List And Fill Another List From Its Data Using Linq
Jul 29, 2010This is what I want to do as seen in C#(loop against a list and fill another list from its data using Linq)
[Code]...
Getting List Of Items Not In Parent List Using LINQ
Mar 28, 2011I am writing app in vb.net
I have two variables one with list of RoomRate and other with list of RoomTypes.
We have RoomRates and RoomTypes linked with RoomTypeInfo variable insite the RoomRate.
So how do i find the RoomTypes which donot have the RoomRates Defined.
My Sample Code:
class RoomType
property UIN as integer
property Title as string
end class
[Code]......
XML To LINQ - Get List Of All Products From XML Doc And Put Them Into A Generics List
Jun 30, 2009I'm basically brand new to LINQ. I've seen some examples that allow me to strong type objects using LINQ but I don't really understand them because they're in C#, which I guess lets you do different things with LINQ(I think?). [Code] I just want to get a list of all the products from the XML doc and put them into a Generics list.
View 3 RepliesHow To 'filter' List-view
Mar 30, 2011I have a listview populated from a database (im a bit of a novice with programming) and i want to be able to type a surname into a textbox and search the listview for that person. I can easily populate textboxes from searching the database but am unsure how to "filter" the listview so if i type "jones" into the surname box it only displays the people in the listview who have the surname jones.
View 3 RepliesAsp.net - Dropdown List To Filter Gridview?
Oct 21, 2011I would like my gridview to be filtered by the dropdown list I have. It is pulling specific information from the database, so when you choose a value from the dropdown list, it should search through all the records and find only records with the ddl value in them.
The code that I am using in the codebehind for the SelectedIndexChanged is not right though. I get an error message saying 'Value' is not a member of 'Integer'. This is on the line dsCompanyFilter.SelectParameters.Add
It probably has something to do with the gridview not tying to the dropdown list properly, but I am not sure how to fix that code.
<asp:Content ID="Content2" ContentPlaceHolderID="body" Runat="Server"><br /><br /><br />
<asp:linkbutton id="btnAll" runat="server" text="ALL" onclick="btnAll_Click" />
[Code]....
Filter A Dictionary To Return A List?
Apr 23, 2012I know I can do this with a for loop cause that's how i'm doing it now. I was hoping for a more efficient way to accomplish the task.
I have a dictionary(Of Integer, Boolean) or Of String, Boolean. i want to get a list(of integer) or Of String from the dictionary where all the values are true(or false depending on what i need at the time)
and to generalize it or "black box" it, it could be any dictionary(of whatever, whatever) and return a list(of whatever) where the value = whatever i'm looking for at the time.
string, string where value = "Closed"
in short: i want all list of all the keys who's value = some criteria
my current code:
Public Function FindInDict(Of tx, ty)(thedict As Dictionary(Of tx, ty), criteria As ty) As List(Of tx)
Dim tmpList As New List(Of tx)
[Code].....
How To Filter List Of(t) By Multiple Criteria
May 14, 2012I am trying to filter a list of (t) by multiple criteria. here is what i have:
[Code]....
I now want to filter this list by myObject's various properties. Heres the problem:
1. A user should be able to either filter on one specific custName or remove the filter for this property AND
2. A user should be able to either filter on one specific notificationDate or remove the filter for this propertyl AND
3. A user should be able to either filter on one specific materialType or remove the filter for this property
I know I can just write a lot of if..then but i'm looking for a more elegant solution.
How To Filter List View Using Textbox
Jan 27, 2012this is the codes but not working
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
[code].....
.net - Filter Duplicate URLs Domain From List C#?
Jun 22, 2011I have a list of 100,000 urls in list(Of string) which can contain urls in the form.[URL]..i have tried using a combination of regex and the Uri class, but that didn't help, so i dumped the code. i also tried using this code, but it will only remove duplicatse of exact form, since its not domain specific.
list = new ArrayList<T>(new HashSet<T>(list))
How filter these duplicates and keep just one of these url if it contains the same name e.g yahoo.
all URL are of different domains, but can usually have duplicates like the example i gave above
also, am using .net 2.0, so i can't use linq
DB/Reporting :: Filter A Database Query Using A List?
Apr 23, 2008How to Filter a Database Query Using a List..
View 2 Replies