Linq Syntax For .net?

Jul 14, 2009

tell me the equivalent syntax for the following code in VB.net?

Static Class TestList
{
static void Main()
{

[code].....

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C# - Triple Dot Syntax For Linq To Xml

May 4, 2011

I 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, 2011

After 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, 2009

I'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, 2009

What 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]...

LINQ To XML Syntax For XML Element With Attributes?

May 13, 2009

I'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, 2010

I 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, 2010

I'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)

Syntax Trouble Building Xml From Linq

Jan 24, 2012

I am building an xml file with the help of Linq queries and I'm not sure why the code below doesn't work.[code]

VB Syntax For LINQ Query That Creates A New Set?

Dec 3, 2009

I 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, 2011

I 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.

Syntax For Order By Clause In Linq To Sql That Has Select New With

May 25, 2011

I 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, 2011

What 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, 2009

I'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, 2010

I'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?

Syntax/Command Trying To Implement Syntax Highlighting In RichTextBox?

Oct 12, 2011

I am having an issue trying to figure this out. I am writing a script editor that uses tabs (a tab control) and I want to implement syntax highlighting. My issue is that every sample I can find on syntax highlighting uses

Private Sub RichTextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox1.TextChanged

C# - Syntax Conversion - Translate Syntax ?

Dec 16, 2009

Can any one translate the following syntax to vb.net.

m_TextBox.Loaded += TextBoxLoaded
m_TextBox.Loaded -= TextBoxLoaded;
private void TextBoxLoaded(object sender, RoutedEventArgs e)[code].....

Convert Late Binding Syntax To Early Binding Syntax In .net?

Sep 5, 2011

i have this code:Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

[Code]...

Error 1: Option Strict On disallows late binding.Im using visual basic 2010 express on a gateway laptop thats running Windows 7 OS How do i resolve this error?

Convert Late Binding Syntax To Early Binding Syntax?

Apr 9, 2009

I have a listbox and it it I am showing numbers.It should look like this (line by line) 1,2,3,4,5,6,7,8,9,10,11.....but is is showing it like this 1,10,11,...2,20,21...3,30...ow can I make it that it will show it in number order 1,2,3,4,5......

Syntax Error: Syntax Error: Missing Operand After '14' Operator

Oct 21, 2009

I want to select some rows from a sql express 2005 table. I am using this expression: "Starttime >= " & dtpStart.Value dtpStart is a DateTimePicker But I am getting this error: Syntax error: Missing operand after '14' operator.

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.net - ActiveRecord Linq/NHibernate Linq Not Building Query Completely?

Jul 14, 2011

given 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

Performance Gain In LINQ Query Vs LINQ Stored Procedure?

Aug 6, 2009

if there is that much of a performance gain in running a LINQ stored procedure versus a LINQ query?

Linq To Entities. GetPropety(name).GetValue Not Recognised By Linq?

Apr 20, 2011

I have a listbox on my xaml form that I bound to a List(Of MyType) property. I populated this list like so:

Dim fields As List(Of CheckableFields) = New List(Of CheckableFields)
Using context As ITIPEntities = New ITIPEntities()
Try[code]....

Now I'm at the point where the user selects the fields they want included in a report and I need to iterate over the required fields. This is my linq query:

For Each checkedField In _requiredFields
If checkedField.IsChecked Then
If checkedField.FieldData IsNot Nothing AndAlso checkedField.FieldData.Trim IsNot String.Empty Then[code].....

How To Get Lamda In LINQ To Actually Filter For Dynamic Linq

Sep 10, 2009

Example-I have a person class

Public Class Person
Private _fname As String
Public Property Fname() As String

[Code]...

LINQ Query Using The Dynamic LINQ Library?

Mar 31, 2011

Forgive my ignorance on this.I have this LINQ Query:Dim ngBikersDataContext As New CarBikeWalkDataContext

bikersList = (From c In ngBikersDataContext.Reg_Bikers _
Order By c.L_Name _
Select New Bikers() With { _
.BikerID = c.BikerID, _
.F_Name = c.F_Name, _

[Code]...

with the error "Overload resolution failed because no accesible 'Select' accepts this number of arguments."
Over the "NEW" I get an error " ')'expected."

"System.ArgumentException: An Item With The Same Key Has Already Been Added." When Trying To Order An In-memory LINQ Query By A LINQ Association?

Jan 27, 2011

We are doing a query against an in-memory collection of LINQ data objects. The wrinkle is that we are ordering by a column in a related table whose records have not necessarily been loaded yet (deferred loading:)

Dim oPkgProducts = _
From b In oBillPkg.BillProducts _
Where b.Successful.GetValueOrDefault(Common.X_INDETERMINATE) = _

[code]....

.net - Linq Expressions With Linq To Entities?

Feb 28, 2012

The pattern I'm trying to avoid is checking if a string (normally a control's text value) is null/empty, and if it is, comparing it using Contains to a field in my data. Obviously the field isn't hard-coded into my extension, neither is the object type.What I've got works perfectly in Linq to Objects, but I get the generic run-time error "LINQ to Entities does not recognize the method 'System.String Invoke(GenericQueryHelper.Customer)' method, and this method cannot be translated into a store expression." when using an entity framework model.

Here's what I have:

<System.Runtime.CompilerServices.Extension()>
Public Function CompareAndFilter(Of T)(source As System.Linq.IQueryable(Of T), expressionField As System.Linq.Expressions.Expression(Of System.Func(Of T, String)), compareTo As String)

[code]....

I want my usage to look something like this:

Dim results = repository.Customers.CompareAndFilter(Function(c) c.FirstName, searchText)

I do need to get this running against a SQL database really, as it is filtering results, so I don't want to be doing that in memory.

C# - Convert Code LINQ To SQL In C # LINQ To SQL In .net?

Jun 27, 2012

How can I convert this code LINQ to SQL in C # LINQ to SQL in Vb.net

[Code]...

LINQ To SQL - Add In Row_Number To A LINQ To SQL Query?

Aug 31, 2011

How do I add ROW_NUMBER to a LINQ query or Entity? How can I convert this solution to VB.NET?

[Code]...

I'm having trouble porting that last line. I have been unable to locate a VB.NET example. I'm actually not looking for any paging functionality like the example provides, just good old-fashioned Row_Number(Order By X) row index.

Convert An Object System.Data.Linq.DataQuery To System.Linq.IQueryable?

Oct 21, 2009

How can I convert an object of type System.Data.Linq.DataQuery to System.Linq.IQueryable?I'm working with Visual Basic/Silverlight, and the source code of my query is as follows:

Public Function Get_Cli_Pag() As IQueryable(Of V_Cliente_Pagare)
Dim Qry = From P In Me.Context.Pagares Join C In Me.Context.Codigos On C.Codigo

[code]....

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