C# - With LINQ, How To Transfer A List<List<string>> To List<string>
Dec 15, 2010I got an object of List<List<string>>I need to bring this into a ist<string>I have no idea how to do this with LINQ.
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.net - Function To Accept List(Of String), Array & String And Similarly Return List(Of String)?
Jul 29, 2011I want the Function to accept List(Of String), Array & String and similarly return List(Of String), Array & String respectively. The Function simply adds a string (month) to the input collection. I just want to use it for string, array and list with needing to think of conversions.
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Play With List Of List Of String With Javascript Or Jquery Using Ajax?
Dec 5, 2011We're working on a big ASP.NETVB.NET website project. I need to populate three dropdownlists. To last two are independent of the previous ones. The population data comes from an SQL Server. I'd have no problem doing this with code-behind with post back but we don't want any PostBacks so I started to develop this in AjaxjQuery.
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Cast/convert From List(Of DataRow) To List(Of String)?
May 22, 2012I'm trying to solve a problem regarding types of list. First of all I have a stored procedure in my DB which does a select of a single column and I try to proceed it in my app in VB. By making a method function I declared a DataTable that loads through the SqlCommand(with the CloseConnection behavior). After that I publicly declared a List(Of String) which needs to be populated with the rows/items from the stored procedure that is on the way. Below is my snippet of the code:
Dim dt As New DataTable()
Try
If conn.State = ConnectionState.Open Then
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It's LPrefix = collection.Cast(Of String)() where I get an exception error telling me that I can't really convert it. The old fashion way is to iterate with for/for each loop but that's not what I want for best use of performance especially if the list will have thousands of rows from a single column. So basically, I want to insert those items from that DataTable to the List(Of String) without For/For Each loop.
Running on VisualStudio2010 Ultimate, .NET FrameWork 4.0.
VS 2008 : Get Fullnames From List (of String) Using LINQ?
Oct 18, 2010I have this vb code in my asp.net webservice.
<WebMethod()> _
Public Function GetUsers(ByVal prefixText As String, ByVal count As Integer) As String()
Dim UsersList As New List(Of String)
[code]....
However, This returns all the users from my user table. I want to get just the users where the fullname is like the prefixtext variable that is passed in to the function.Now I need to use LINQ(the only way I can think of). But how do I change my code.
Assign Result (from LINQ To XML Query) To List(Of String)?
Jul 6, 2011Is it wrong? Please suggest me correct way.
Public Function ReadXML() As List(Of String)
Dim list As New List(Of String)
Dim xmlDoc As XDocument = XDocument.Load("C:\MappingFile.xml")
[code].....
Linq - Create A Concatenated String From A List Of Objects In 3.5?
Apr 27, 2012I figure I should use 'Aggregate' but apparently I am getting it wrong First I get a list of my Entity objects Dim employers As List(Of myEntity) = (New XXXX()).getZZZ(userName, userType) Then I figured this would be a way to put all the names in a string Dim names as String = employers.Aggregate(Function(current, [next]) current.Name & " " & [next].Name)
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Linq Query To Compare If Collection Contains List Of String?
Feb 3, 2012I am using a path comparison to find any children tags which works well when there is only 1 tag selected. This is my code for when multiples tags are selected but it is not working. Can you point me in the right direction?
Single Tag Selection (working)
Dim tagpath = uxTags.SelectedItem.Text
lnqCases = From i In lnqCases Where i.HelpDeskTagItems.Any(Function(x)
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LINQ To SQL Basic Column Search Doing OR / AND Of A List<string>?
Nov 23, 2011Is there a way to check if a column contains all or any of an items in a list? Example "ABCDEFG" is my column value. "A" "C" "L" is my list stored in a list. I need to find rows that contains at least one item in my list. Then items that contains ALL the items in my list (a basic OR / AND search such as a SE would have)
View 1 RepliesVb.net - Convert From Custom List To List Of String
Mar 25, 2010I have the following code:
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The intention is to convert an IList of custom objects to a string equivalent comprising each element in the Ilist. Unfortunately I can't seem to find a way to get the underlying data of the custom object, and of course as in the above example, using object simply gives me a string of types definitions, rather than access to the underlying data.
Reorder A List Of String Into A New List?
Mar 29, 2012I want to reorder a list of strings into a different list of strings. I am creating multiple loops to do this, however i was wondering if there was a better way to do this.
Dim values As New List(Of String)
For Each val As String In vals
If val.Contains("10") And val.Contains("Year 1") Then
[Code]....
There are going to be quite a lot of these loops to do what I want can anyone offer any help or a better way to go about doing this? Note that I want the values list to return 10,10,10,20,20,20 so that lines that have 10 should be added first and lines with 20 then afterwards.
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
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Compare List(Of String) To Another List(Of String)
Dec 30, 2009I have two List(Of String) both containing several hundred thousand results.
Private Function AddUniqueFiles(lNewFiles as List(Of String)) As outList(Of String)
Dim aCounter As Integer = 0
Dim files As New inList(Of String)
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However the time it takes to do this comparison can be very long indeed - is there a better way of doing this type of comparison... All I am trying to do is add values from List2 in to List1 which are not already present in List1 - So in effect adding new Unique values found in List 2 in to List 1. I am only looking for performance improvements - nothing else.
.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
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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....
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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)
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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
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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 RepliesSorting - Sort List(of String()) Using A Variable Index Into String() As Key ?
May 30, 2012I have a List(of String()). I have written a custom comparer (implements IComparer(of string)) to do an alphanumeric sort.Is there a way to sort the List using a given index to determine which position in the String() to sort by? In other words one time I might sort by Index = 0 and another time by Index = 3. The length of all String() in the list is the same.For reference this question is similar to Sort List<String[]> except I am using VB.net and that question is hardwired to Index=0.
EDIT from OP's comments:I started simple with the non custom comparer but I am getting an error: expression does not produce a value. Not sure what I am doing wrong.Here is the code:
Public Shared Function SortListOfStringArray(ByVal ListOfStringArray As List(Of String()), ByVal SortByIndex As Integer) As List(Of String())
Return ListOfStringArray.Sort(Function(x, y) x(SortByIndex).CompareTo(y(SortByIndex)))
End Function
Convert List Of String To A String Separated By A Delimiter
Apr 15, 2009Whats the best way to convert a list(of string) to a string with the values seperated by ,
View 3 RepliesGetting A String From A List Box On One Form To A List Box On Another Form In VB 2008
Oct 17, 2010I need to get a string from an items collection in a list box on one form to a list box on another form in VB 2008. Here is the code (I've tried a couple ways in the code to get the values over).
Public Class frmPrintBooks
Private Sub btnClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
Handles btnClose.Click
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Convert A List(of String) To String()?
Nov 11, 2011Dim namelist As List(Of String) = New List(Of String)
namelist.Add("Hi")
namelist.Add("Hello")
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How To Declare List(Of String()) With String(2)
May 5, 2012I am trying to declare List(Of String(2)) and it doesn't work
I understood that if I specify the length of the string() the compiler will not need to guess the length and it will be more fast that way, is it correct?
List(of String) To Dim Item()() As String
Oct 22, 2011I have a list with a few items ( changes once in a while ) named itemlist
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Add To A List(Of String) While Using One?
Jan 14, 2010I'm thinking about making a queue system for my program which uses Asynchronous file downloading.
Now what I'd like to know is if I setup a For Loop like so[code]...
And I add to that list while the program is looping through this, will the program pick up that new Item, or do I need to find a way to abort and restart?
Add Text To A List(Of String)?
May 31, 2009I was wondering how to add the text from a text file to a List(Of String), one line per item (in the list).
View 19 RepliesGet List Of String From Objects?
Aug 26, 2011I was wondering how I could go about getting a list of string from a list of objects, while removing duplicates[code]....
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