I have recently started using vs2008 for the linq feature but am having problems using it with a sorted list.my sorted list has a key of timestamp.I want to retrieve the first item from the sorted list having (key) timestamp <= myTimestamp.
View 8 RepliesI want to create a sorted list, where I enter a name in two separate text boxes(Jones, Brown) and their values in two other textboxes(200,500), then in a fifth text box I enter one of the names and it gives me a messagebox with its corresponding value. Here is my code below.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim saleslist As New SortedList(Of String, Decimal)
[code]....
How can I get the resulting generated list of links sorted out alphabetically according to "sTitle"? My sort function on line 272 is not giving me the results I need.
<script language="VB" runat="server">
Function sectionTitle(ByRef f As String)
'Open a file for reading
'Dim FILENAME As String = Server.MapPath("index.asp")
Dim FILENAME As String = f
'Get a StreamReader class that can be used to read the file
[Code] .....
I wrote the code and it works great but then i thought i'd have a little challenge and go above and beyond. i decided to make a highscore leader board system. i used the following variables and sub classes to make it but im having a slight issue...
CODE:
The idea is that i wanted to make the system able to associate a name with a score, sort the score from greatest to lowest, save it to a text file, load it from the text file, repeat.
so heres a quick list of what i have working...
-Stores name and score
-Sorts by score then outputs
-occasional index of -1 issue
-saves score and name to a text file
-loads score and name when the form loads
-CANNOT add new data to the sorted list...
Thats my main issue. When i have data loaded from last time i try to add a new score to the list but then it gives me an error.
InvalidOperationException was unhandled Failed to compare two array elements
-pointing to the line...
In the details of the exception it continues to say...InnerException {"object must be of type String"}
i don't know which parameter its referring to tho, the variable name is already of type string and count is type integer.
I keep track of a score system for all users in a sorted list;
dim Scores as new sortedlist(of string, integer)
I can easely increse points for a cirtain person by;
scores("peter").value += 1
Now I need to display a top x list of the users, if users have the same score, it should sort alphabetically on the name. Of course it's also possible that users have the same score.I've already tried to make a new sorted list with as key the score, and added to that score the username. Later when displaying the scores, I've replaced the username with nothing. The only problem in this solution is that the numbers are sorted on asci value which has this order:
0
1
10
2
3
4
Also, if you make a sorted list like this:
dim Scores as new sortedlist(of integer, string)
You can't have two people with the same score... So, there must be something possible with the iComparer to sort on integers right?
How can I sort data in a sorted list using values instead of keys from highest to lowest?[code]...
View 2 RepliesI'm having some difficulty with a sorted & grouped listbox in WPF vb.net 3.5 that has an items source bound to an ObservableCollection.
What I want to be able to do is to retrieve a piece of data from the ObservableCollection items source depending on what item in the listbox the user has selected.I've almost got it working but because the listbox is sorted it does not match the index of the items source.
[code]...
As I previously mentioned, because the lstBox is sorted and also grouped the index's don't match up.Does anyone know how I can get the correct information I want from the List Source depending on the selected item in the list box?
y have this class
Private Class MyClass
Public Property propertyOne() as String
Public Property propertyTwo() as String
[code].....
How 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)
I have 2 classes
Public Class Shipper
Public Property ShipperID As Long
Public Property CreateDate As DateTime
[Code].....
How 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]......
I 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 RepliesI'm trying to create a list of days(integer) from a list of dates(date).
I tryed to do this....
[Code]...
This is what I want to do as seen in C#(loop against a list and fill another list from its data using Linq)
[Code]...
I 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]......
I'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 RepliesI 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.
View 1 RepliesI am trying to use linq to query a List(of T) object, but when i type in my linq statement it comes back with the following error: Error57Expression of type 'System.Collections.Generic.List(Of BreakoutData)' is not queryable. Make sure you are not missing an assembly reference and/or namespace import for the LINQ provider.D:\Code\OLGA35\BreakoutByBusinessUnit.aspx17025D:\Code\OLGA35\
I have looked at my web.config and I have the imports:
<assemblies>
<add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
<add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral,
[CODE]...
I have put in several imports at the top of my page, but that hasn't helped
<%@ Page Language="VB" MasterPageFile="~/MasterPage.master" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Import Namespace="System.Core" %>
[CODE]...
I'm not sure what to do at this point.
Here is the code that is relevant:
Dim ListCollection As List(Of List(Of BreakoutData))
Dim GroupList As List(Of String)
Dim DataList As List(Of BreakoutData)
[CODE]...
Everything i've found on google just says to add in the System.Core, System.Data.Linq references, but as far as I can tell it all is setup correctly
I am trying to use linq to query a List(of T) object, but when i type in my linq statement it comes back with the following error:
Error57Expression of type 'System.Collections.Generic.List(Of BreakoutData)' is not queryable. Make sure you are not missing an assembly reference and/or namespace import for the LINQ provider.D:\Code\OLGA35\BreakoutByBusinessUnit.aspx17025D:\Code\OLGA35\
[code].....
I'm using a program see here: Visual Basic Regular Expression Question. I enter letters and the program returns all possible combinations from list. I want change this line of code...
Dim result = fruits.Where(Function(fruit) Not fruit.Except(letters).Any())
If I have this list:
Dim fruit as List(Of string) from {"apple","orange","pear","banana"}
And I input "p a p l e r" then it would return "apple" and "pear", but if I enter "a p l e r" then it would return just "pear". The idea is to return all words, which can be made of entered letters without duplicating any single letter. How to optimize this Linq code?
Dim query = From o In myContainer.MyObjects Select o.MyStringProperty Distinct
Dim myProperties As List(Of String) = query.ToList????? 'no way!!!'
"query" type is IEnumerable(Of String)
I tried to use the query directly as a DataSource of a (infragistic) combobox, but it throws me NullReferenceException, so I decided to convert it to a listof strings, to be a more "classical" datasource.
Dim values As List(Of String) = query.AsQueryable().ToList()
does not work either: Value of type 'System.Collections.Generic.List(Of System.Linq.IQueryable(Of String))' cannot be converted to 'System.Collections.Generic.List(Of String)'.
If I have a List(Of Guid) can I map those Guid's with a single Linq expression to a CheckboxList of values?
View 1 RepliesI trying to do what seems to be a simple thing but I'm having problems. The answers I find aren't working. I'm still getting casting exceptions:
Dim query = (From l In dePhl.cv_phil Where l.batch = strMmddyyyy
Select l.zipfile.Distinct)
Dim objFileList As List(Of String) = query.ToList() 'Error
[Code]....
Assume I have the following XML file:
<Movies>
<Movie ownerName="Ryan">
<Title>The Lord of the Rings Trilogy</Title>
[code].....
Public 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
I am a bit new to linq, I am only using linq for filtering the data. [code]...
Con.Numbers is a dictionary, but now I converted it into a list, hence the above code wont work with list[code]....
I am trying to learn some VB.NET for my coo-op that starts next week, and for that reason i took my portfolio web site that is on C# and just started to converting it to VB.NET to get familiar with the syntax.
I am sure my problem is simple however i have a hard time solving it. I am trying to grab data with the linq query and then return it as list to bind to the Repeater.I have the following function:
[Code]...
And it would work fine. However if I try to use ToList() in VB.NET i am getting error that it cannot convert it from ling to sql List to the generic list. How do i do this convertion in VB.NET ? or maybe there is another way ?
I am decent when it comes to C# however somewhat lost with the VB.NET syntax.
'Read RESX file and returns a List(Of ResXDataNode)[code]...
Provide two separate copies of the node? Or will the List and Linq query still be referencing the same data?
I have a List(Of Hardware) - the List is called HWModels
Class Hardware has the following Properties:
ModelName
Status
CPUStatus
MemoryStatus
DiskStatus
The List is populated by reading a CSV file, once it's populated, I want to return the distinct records based on the ModelName
I've attempted by doing it as follows:
(From a In HWModels Select a.ModelName).Distinct
But this isn't right because I end up with a list of only the ModelName's and nothing else.
How do I get the Distinct function to return all of the other class members within the list?
I need to take a collection and group it via Linq but all the examples I've seen fail in some manner or other with some syntax difference that I can't quite lick.
My collection:
Dim a As New List(Of ProcessAlert)
a.Add(New ProcessAlert("0000112367", "5551110000@txt.att.net", "Alert", 2))
a.Add(New ProcessAlert("0000112367", "5551110000@txt.att.net", "Document", 2))
[Code].....