Syntax Trouble Building Xml From Linq
Jan 24, 2012I am building an xml file with the help of Linq queries and I'm not sure why the code below doesn't work.[code]
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.net - ActiveRecord Linq/NHibernate Linq Not Building Query Completely?
Jul 14, 2011given this function:
Public Function Search(ByVal StartIndex As Integer, _
ByVal MaxResults As Integer, _
ByVal AccountNumber As String, _
ByVal LastName As String, _
[Code]....
instead of what I expected:
Select count(*) from remitline where lastname = "smith"
What am I doing wrong building up the where clause? I'm using Castle ActiveRecord 2.1
Building A DNN Module Using Linq To SQL
Oct 26, 2009I am building a module using linq to SQL and I am running into some problems. I have been following Michal Washington's tutorial on [URL]. The problem is that VB does not recognize my Complaint Class when I try to create new Complaint object. why I am unable to Dim a Complaint object? Here is my code:
[Code]...
Building A Dynamic LINQ Query
Mar 16, 2011I have a listbox which users can select from a list if Towns, I want to be able to build a LINQ query based on the selected items in the list e.g.
[Code]...
Dynamically Building LINQ Query Using OR Operator In VB
May 22, 2009I need to build a dynamic linq query with or operators. I have seen PredicateBuilder but that is in C# and my project is in VB. Basically I need to build a WHERE clause similar to this:
Where((this = 1 AND that = 2) OR (this = 1 AND that = 4) OR (this = 2 AND that = 4))
but the problem is the number will have to be determined dynamically at runtime, and added using a loop, like
for each item in myItems
query = query.OR (this = item.a AND this = item.b)
next
VS 2010 Dynamically Building LINQ Query To Search Objects
Mar 24, 2011I am creating a mediaplayer / playlist creator tool that basically imports MP3 songs into playlists (grids). I'm looking to add search functionality where the user can search all open playlists (or a subset of the open playlists). A Playlist is basically a collection of AudioFiles, where an AudioFile is a class that holds the filename of the MP3 file and then exposes the tags (Title, Artist, Album, etc) in public properties.
The idea is that the user can search for a certain expression (for example "the"), and that he can then choose whether to search in the title, in the title and artist, in the title or artist, in the title, artist and/or album, etc. However, I'm having a hard time implementing this and also having it kind of dynamic.
At the moment I am simply gathering all the AudioFiles from the open playlists (or from the subset of playlists the user chooses) and then running a simple LINQ query to find those AudioFiles where the Title contains the search text. Then I display the resulting AudioFiles in a new playlist window:
[Code]....
In case the AND / OR distinguishing is too hard, I would be happy to start with just letting it default to 'OR', so that the user can check Title and Album for example. If he would then search for 'a' then all songs that contain 'a' in their title as well as all songs that contain 'a' in their album should be returned. I guess that makes it easier, but I still wouldn't know how to dynamically create the LINQ query.
.net - Building A LINQ Expression To Find Items Related To All Descendants Of A Tree Node?
Mar 7, 2011I have built a database structure that represents a category tree to help classify some of the data we have stored. The implementation is that each record in the Category table has a nullable foreign key back into the Category table to represent the parent Category of this category (one-to-many), essentially allowing for subcategories within a broader parent level. There is a CategoryMembership table that links a record in the Item table to its respective Category (many-to-many). I have created the DBML for this database, and it has a member access structure that includes the following:
[Code]...
Linq Syntax For .net?
Jul 14, 2009tell me the equivalent syntax for the following code in VB.net?
Static Class TestList
{
static void Main()
{
[code].....
C# - Triple Dot Syntax For Linq To Xml
May 4, 2011I ran into this answer which had a triple dot syntax in VB.NET that I have never seen before. The query looks like this
[Code]...
Differences In LINQ Syntax Between .Net And C#?
Jun 29, 2011After I have programmed several projects in VB.Net I to my surprise discovered that there are some more than subtle differences between C# and VB.NET LINQ usage.For example, if we want to group elements by multiple properties (columns) we need to create a new anonymous type explicitly:
var procs = from c in Process.GetProcesses()
group c by new {c.BasePriority, c.Id} into d
select d;
whereas in VB.NET more straightforward syntax will already do:
Dim b = From c In Process.GetProcesses()
Group c By c.BasePriority, c.Id Into Group
Select Group
So, one does not need to create a type with "new" here. What are the other differences? good comparison between the LINQ syntax in C# and VB.NET?
Exclusionary Set Syntax With Linq, VB
May 5, 2009I'd like to do a subtraction of sets based on criteria. A pseudo-query would look like:
select table1.columnn1
,table1.column2
from table1, table2
[Code]....
I can make it to about here:
dim list = From tbl1 In table1 Where tt.column1 ...
Linq Syntax In Program?
May 28, 2009What I really want is to select these two tables in to an anon type like in Scott Gu's blog: here However, I would settle for this created type "ActiveLots" I am joining two tables together and want to be able to reference columns from each in my result set. [code]...
View 1 RepliesLINQ To XML Syntax For XML Element With Attributes?
May 13, 2009I'm a bit of a LINQ newbie and I was having some trouble with the following. I'm trying to perform a query using LINQ on an XML file and store the results in a list of DataClass objects that match the XML.I've got an XML file that is defined like this:
<NewDataSet>
<NewDataTable>
<Field>Accepted ASNs</Field>
<Val>59</Val>[code]....
I have created a Data class to support this XML format. What I would like to do is create a LINQ Query to grab these 3 records and store them into a List of my DataClass. In order to support multiple Order elements, I have my class defined with a generic list of "Order" structs... It looks like this:
Public Class ASNData
Private _field As String
Private _value As String[code].....
how to grab the 3 order elements and store them into my list of Order structs.
LINQ To XML Syntax And Class Objects In .net?
Dec 10, 2010I have the following XML file
<Test>
<Modules>
<Module Name= "Test1">
<QueueName Name="Test1Active1" Active="True"></QueueName>
<QueueName Name="Test1Active2" Active="True"></QueueName>
[Code]...
Linq To Xml Syntax For Documents With Xml Namespace?
Aug 6, 2010I'm trying to grasp the linq to xml 'inline query syntax' features of VB.Net First I tried with this simple xml file:
<?xml version="1.0" encoding="utf-8" ?>
<Root>
<Child Name="somename">
[code]....
This xml, when loaded in an XDocument, can be loaded and queried as follows:
Dim xdoc = XDocument.Load("sample.xml")
Console.WriteLine(xml.Root.<Child>.@Name)
Then I change the <Root> element in the sample xml file to:
<Root xmlns="http://SomeNamespace">
Now I can't seem to use the convenient 'Axis Properties' syntax anymore... I can only get it to work with the explicit XElement syntax:
Dim ns As XNamespace = "http://SomeNamespace"
' works, but I would like to use the same syntax as above...
Console.WriteLine(xdoc.Descendants(ns + "Child").First().Attribute("Name").Value)
VB Syntax For LINQ Query That Creates A New Set?
Dec 3, 2009I am trying to AVERAGE 6 different fields on a DataTable, but without grouping. Just the AVERAGE. I have found a couple of examples in C#, but can't find any examples for how to do this in VB.Here is what I have so far:
Dim query = From dtRow In dtIn.AsEnumerable _
Where dtRow.Field(Of String)("FOLLOWUP") = "Alert" _
Select New With { _
.Brand_Functional_Avg = XXX.Average(Function(f) f("Brand_Functional")), _
.Brand_Personal_Avg = XXX.Average(Function(f) f("Brand_Personal")) _
}
What should I use for XXX? I tried all of the options that I could think of and nothing is compiling.
Trust me, if I could write this in C#, I would, but the project requires VB.
Linq Expression Chain Syntax For In Query?
Feb 25, 2011I have a query that I cannot seem to replicate in expression method chain syntax. I have two tables "User" and "UserPayment". User and UserPayment have a one to many relation i.e. One User can have many UserPayments.
View 1 RepliesSyntax For Order By Clause In Linq To Sql That Has Select New With
May 25, 2011I have a LINQ to sql statement that joins 2 tables. I would like to add a order by clause on one of the columns. However the order by clause does not seem to take effect at all. right syntax in VB.net to achieve order by in the following:
Dim query = From dtIt In dbsomecontext.mytable
Join dtIl In dbsomecontext.anothertable On dtIt.ItemID Equals dtIl.ItemID
Where dtIl.IsAvailable = True
Order By dtIt.manufacturer
[Code]...
.net - Proper Syntax For LINQ Query Selecting Only Certain Columns?
Sep 13, 2011What is the proper syntax for this:
Dim qry As <??> = From f In dirInfo.GetFiles("*.QBW") Select File = f.FullName, Include = True
Dim dt As DataTable = qry.CopyToDataTable()
I tried as "IEnumerable(Of DataRow)" but that didn't work. At runtime it said:
Unable to cast object of type
'WhereSelectArrayIterator2[System.IO.FileInfo,VB$AnonymousType_02[System.String,System.Boolean]]'
to type
'System.Collections.Generic.IEnumerable`1[System.Data.DataRow]'.
LINQ - Syntax - Snippet Code In VB - Receiving An Error
Jul 14, 2009I've been trying to write this snippet of code in VB, can anyone see what is wrong with it? I am recieving an error on line 5.
Dim a1 = From rows In db.tPDMLinkUsages _
Where (rows.ACCESSDATE >= DateTime.Today.AddDays(-90)) _
Select New With _
{ _
[CODE]...
What's Equivalent Syntax For Anonymous Types In A LINQ Statement
Jun 29, 2010I'm trying to translate some C# LINQ code into VB.NET and am stuck on how to declare an anonymous type in VB.NET.[code]How do you translate C#'s new { ... } syntax into VB.NET?
View 2 RepliesException When Building LINQ Query With Multiple Levels Of Delegates Or Lambdas ("Value Cannot Be Null. Parameter Name: Instance")?
Jun 22, 2011've got a function that takes two parameters (a delegate and an integer) and then creates a LINQ MethodCallExpression, which it uses to gets the results:
Public Delegate Function CompareTwoIntegerFunction(ByVal i1 As Integer, ByVal i2 As Integer) As Boolean
Public Function Test(ByVal pFunc As CompareTwoIntegerFunction, ByVal i1 As Integer, ByVal
[code].....
Trouble With Classes And Functons
Oct 10, 2011I thought I was beginning to grasp this function and class business, but it's still giving me a lot of trouble. I created a class for the character, with a function to randomly generate a number for damage, but I'm having trouble calling the function with a button click on the main form to test display a random number in my rich text box.[code]
View 5 RepliesMultiplication Game In VB Trouble Shoot
Feb 16, 2011This is my assignment for tonight. If anyone can enlighten me as to why it doesn't work. I
know I haven't finished the timer, I trying to get results in the labels.[code...]
Trouble Splitting Comma In Array
Nov 29, 2009So I'm trying to split a "," from an array that I parsed after the xml file is loaded. I tried several things.[code]
View 10 RepliesWPF Trouble Updating A Textbox From A Variable
Jun 15, 2012Using WPF, and VB.net, I want to update a textbox in a textblock with the current date and time. I use a timer, and it seems to be firing, and setting an object property to "Now".And I am using iNotifyPropertyChanged.All I get is an empty textbox with no data in it. Can you help? Maybe my context is off? [code]
View 4 RepliesVS 2008 Trouble With Emailing And Then Deleting Emailed Files
Aug 12, 2010My app looks in a folder for all the pdf files and then emails it to an address.If the email was sent successfully, the file in the folder must be moved to a new folder called "Sent". Or the approach you will see in my code where I copy the file to the new location and then delete the old one. [code]
View 4 RepliesVS 2008 Trouble With Multidimensional Structure Based Array
May 27, 2010I currently for the life of me can not get this to work.[code]Days(num).openTime(0) = New Date() 'Which gives the same error as openTime @ 0 has not been created as an array object (I'm assuming)Which leaves me completely lost because I've never had issues assigning initializing 1-dimensional arrays but this i just confusing the heck outta me. If anyone knows how I can initialize the 2nd part of the array (Days(num).openTime(0)) I would love to learn from you.
View 1 RepliesVS 2008 Application To Send E-mail - Trouble Making It Use Both Office 2010 And 2007?
Dec 14, 2010I have written an application which uses the Outlook object library to send an e-mail with information from a textbox. I programmed this on Windows 7 and Office 2010, which was a mistake as most of the clients will be using Windows XP and Office 2007. I am getting an error when running the application on Windows XP/2007:
Could not load file or assembly 'Microsoft.Office.Interop.Outlook, Version=14.0.0.0 .... etc
I understand that this is because I have not loaded the Outlook 12.0 assemblies, however I am having trouble adding the assemblies on my Win7/2010 programming machine. I have downloaded the standalone Office 2007 PIAs however the Outlook 12.0 doesnt appear on the list, and when I try and add just the Office 12.0 I get an error.
is there a way to standardise and make the application work with both 2007 and 2010 outlook machines? I think it is possible, I have read some articles making the application choose the correct version, however cannot figure out how to.
Can Retrieve Records From Database Fine / Having Trouble Updating Records
May 17, 2006I can retrieve records from my Database fine, but I'm having trouble updating records. I am getting a syntax error on [code] I get this error when I change the Last Name (Row 0, Column 1). [code]
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