VS 2008 Xml Document Would Be Taken From The Web And Stored Into An XDocument Object / Linq Query
Jul 27, 2010I have the following xml document which would be taken from the web and stored into an XDocument object.
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Performance Gain In LINQ Query Vs LINQ Stored Procedure?
Aug 6, 2009if there is that much of a performance gain in running a LINQ stored procedure versus a LINQ query?
View 1 RepliesAccess The Properties Of All Controls Stored Into Array Of Object Using LINQ?
Jun 3, 2011I's there a way that I can access the properties of all controls stored into my array of object using LINQ.
Public Sub DisAble(Byval ParamArray ctrlCollection() As Object)End Sub That is my sub routine where im trying to reset all controls that will stored into that object of array. But im trying to attain that using LINQ so I wont use any loops to access all of it.
How To Write This Into Linq To Object Query
Feb 24, 2010from a list, which got 3 attributesI want to return a new list of that class where attribut1 recurrence in the list equals Xfor an example this;
1,a,b
1,c,d
1,e,f
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C# - LINQ Query On Object With Unknown Class
May 13, 2011I have an array of unknown (to the current method) class objects. I do know that each class has a property called "Number". I am trying to write a LINQ query where I am looking for the object with the next Number in sequence. AKA, I'm at Number 8, use a LINQ query to find the object where Number=9.
View 5 RepliesLINQ To Objects, Query Arrays In Object?
Sep 15, 2011I need to query an array. I have tried to use LINQ but with no success.
Here is a simplified structure of Insurance
Public Class Insurance
Public _typ As String
Public _numb As Number()
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Declaration Expected Error For System.Xml.Linq.XDocument?
Mar 27, 2012I am trying to learn about XML literals in VB. In a "learning" project which based on a console application template the following compiles and runs without error (and without any special Imports statements nor references added):
Module Module1
Sub Main()
Dim db As New AdventureWorksDataContext
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Determine The Type Of Object To Use To Store A Linq Query?
Jul 3, 2010I am using VB .Net for this, so I don't have access to var or this would be a simple matter.Right now my query is as follows
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So I used this query in LinqPad to help me determine what the object would look like. I got back a IOrderQueryable(Of RSError) which then contained a IGrouping(Of String, RSError) for each grouped collection of objects returned by the query.However I ended up with the current object type of errors as IOrderedQueryable(Of IGrouping(Of String, RSError)) because of the cast error I am getting in VS.
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I'm not sure how to get rid of the VB$AnonymousType_1 Part of the returned object.Am I even on the right track here or am I missing something completely?
LINQ - Query Children Object If Parent Count Is = 1
Apr 17, 2012I have a the following Class structure. Company > List(of Departments) > List(of Employees) I want to Query a Company to find out if it has a department of the following name and a Employee in that department with the following ID! How could I query this. The way I have the code it expect to return one department so I have it doing
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Read XML File Using XDocument And Build Dynamic SQL Query?
Jul 8, 2011I wrote a function ReadXML().This function reads XML file and returns a string.The string contains all the XML file nodes values to duild SQL query dynamically. Any way My code is working. Is this right way? Can you please suggest me the unnecessary code(loops...)in this function, So that I can do the code in a better way.[code]
View 1 RepliesCreating A Reference To An Object In An IEnumerable Linq Query Would Be Really Slow?
Jun 18, 2009Is there any particular reason why creating a reference to an object in an IEnumerable Linq query would be really slow? I have a Linq query list consisting of my own objects (count is about 200).I was doing a time-critical task, and this line (which was used a lot in a loop) took nearly a millisecond to execute:
Dim CurObject as MyClass = QueryResult(CurIndex)
LINQ Query To Group Data Between Two List Collections, Populating A Nested Object
Oct 26, 2011I have these objects:[code]Using LINQ I need to take a List(Of MakeInfo) and a List(Of ModelInfo) and aggregate the StockInfo from ModelInfo into the List(Of MakeInfo).So for each MakeInfo I will have a total count of all stock where MakeInfo.Name = ModelInfo.Make, and also a minimum price.I think it's going to be something like this, but I'm having trouble accessing the nested object and not sure if it's going to be possible with a single query.[code]
View 2 RepliesVS 2008 Linq Possible To Use Query In Another Query?
Apr 16, 2011I was wandering is it possible to use a query within another query below is the code I am trying to use.
Public Function GetInventByComp(ByVal CompID As String) Using DC As New DataClassDataContext
'need to get company id's based off names? thats bad should be name from Id need to rethink this
Dim invent = (From C In DC.Inventors_Companies _
Where C.CompID = CompID _
Select C.InventorID).ToString
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I was trying to us multiple values in a string like "1, 3, 5" but I can't seem to get that working either so I am trying to use just a single value now. Can anyone help me? "Yes I am new to this"
LINQ Query Is Enumerated - Turn On Some Kind Of Flag That Alerts Me Each Time A LINQ Query Is Enumerated?
Sep 22, 2009I know that LINQ queries are deferred and only executed when the query is enumerated, but I'm having trouble figuring out exactly when that happens.Certainly in a For Each loop, the query would be enumerated.What's the rule of thumb to follow? I don't want to accidentally enumerate over my query twice if it's a huge result.
For example, does System.Linq.Enumerable.First enumerate over the whole query? I ask for performance reasons. I want to pass a LINQ result set to an ASP.NET MVC view, and I also want to pass the First element separately. Enumerating over the results twice would be painful.It would be great to turn on some kind of flag that alerts me each time a LINQ query is enumerated. That way I could catch scenarios when I accidentally enumerate twice.
VS 2008 Return Dataset From Access Stored Query
Feb 7, 2010I am trying to call a SELECT query (with parameters) in Access from VB.Net 2008. I am able to call queries without parameters using the code below. The problems are (1) how to apply the parameters to procName and (2) how to get a dataset returned. I have looked around the net for hours and have found some examples. However, they are all for ms access action (update, delete, etc) queries using ExecuteNonQuery which does not return a dataset.
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Linq To Sql Query Using 2008 Express Edition
Jan 4, 2011I encountered something like a logical error which I could hardly resolve since I'm new to this technology. I'm using visual basic 2008 express edition with its built-in linq-to-sql technology. I was able to retrieve, add, edit, and delete such record using the linq-to-sql method, but one thing.I could not get is something like relational database operation. Here is my problem. As you can see the table above which represents the records on my database. You can notice there some account numbers that were duplicated which I used as the primary key or identifier. What I want is when I'd like to query such account number it should display all the records that have the same account numbers on it. Say for example, if I query the account number 00003. It should only pull up and display three records with the name Maverick and their corresponding address, movie rented and date.What is happening in my end is when I query such account number which are being duplicated in the database I encountered two things, its either it would display all the records in the database with different account numbers associated or it gives me an error message if I change my code from 'For Each memrec In db.Table3s' to 'For Each memrec In retrn' statement.What I've been trying to do here is if you enter the account number on the search box, it should only display the records on the combo box associated with the account number being entered. Like if you enter 00003 on the search box, it should only display the three movies rented by Maverick no more no less on the combo box. [code]
I have already tried that set of codes before but it's working the same thing. I tried many times modifying my codes before I posted my comment in this forum thinking that i can resolve it on my own but I wasn't able to. That code won't still filter the records in the database. I would like to verify that the table above is only representation but the real column on the table on my database is 'Account#' not Account Number and visual basic would detect the code as 'Account_'. May i know why Movies_Rented column on my table is not a member of string? Why is it the code you gave would still display all the records on the combo box? this is what im not getting. hope you can still find the solution to this issue.
VS 2008 Convert A String Into A Linq Query?
May 20, 2012Is there a way to convert a string into a linq query? Searching for those words brings up tons of stuff unrelated to what I'm trying to do..For instance, this works, of course...
Dim lstMyQuery = (From item in htMyTable.values where item(0) = "Apple" Select item)
But somehow I want to do this:
Dim strQuery = "From item in htMyTable.values where item(0) = " & CHR(34) & "Apples" & CHR(34) & " Select item"
Dim lstMyQuery = (Somehow run/convert strQuery as a query)
The reason is strQuery will be different each time depending on what the user has selected earlier in the program.R if lstMyQuery is already a collection, is there a way to add to it?
Dim lstMyQuery = (From item in htMyTable.values where item(0) = "Apples" Select item)
(this obviously doesn't work, but it's basically what I want to do...)
lstMyQuery.Add(From item in htMyTable.values where item(0) = "Oranges" Select item)
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 2008 Query Datatable With LINQ And Set DGV Datasource?
Nov 7, 2011i need to query the datatable & set the outcome as datagridview controls datasource
vb.net
Private Sub Txt_Search_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Txt_Search.TextChanged
'routine objective:- Filter datatable & set the datagridview datasource
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VS 2008 Get Original List Index Of LINQ Query
Oct 24, 2010If I use a LINQ query over some type of collection, is there any way to know the initial index of an element of the result?
Purpose: I make a query to set as source of a DataGridView, and on a (button)cellclick event I want to a call a method that needs to reference the collection at the correct index.
VS 2008 - LINQ Query - Groups And Counts On A Single Dgv Cell ?
Aug 11, 2010I have a LINQ query that groups and counts on a single dgv cell. What I want to do is group and count on 2 dgv cells. So I modified my existing query by adding a SELECT statement highlighted :
CODE:
But I am getting an error on the second select variable stating: Range variable 'Value' is already declared
What I have read shows that I can select more than one variable.
What I am trying to achieve is this:
Original
CODE:
Result:
CODE:
.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, _
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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
VS 2008 - LINQ Query Against A Typed Datatable That Will Return Me Duplicated Data?
Jan 25, 2010I'm trying to do a LINQ Query against a typed datatable that will return me duplicated data.With out going into too much detail, here's the basic setup:
strCode1 - string type
intCode1 - int32 type
intAdjustor - int32
There are more fields but these are the ones that are important.I'm going to do my best to describe this, as it's kind of confusing.In theory intCode1 is a key for strCode1 (hence the names). So each time intCode1 is duplicated, the same strCode1 should appear. Example:
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Ultimately I'd like to get a List(Of T) - where T is my typed data row. In SQL, I would simply use a sub query, to get a distinct list of strCode1 and intCode1, then do a count, grouped by strCode1 where I get more than one row.I'm not sure how to translate that into LINQ, AND get the original types data rows returned in a list.
VS 2008 DataGridView Populated By LINQ Query - Unable To User Edit
Dec 12, 2010I'm using a DataGridView to post the results of LINQ-from-SQL query. I was hoping that the data would be editable in the DataGridView, but it isn't. I made sure that DataGridView.readonly = false. I'm using VB.
VB 2008
DB = New CXToolDataContext()
Dim Systems = (From TBLSYSTEMS In DB.tblSystems, TBLSYSTYPES In DB.tblSystemTypes _
Where TBLSYSTEMS.ProjectName = projectnumber And TBLSYSTEMS.SystemType =
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VS 2008 : Get XMLNamespace Using XDocument?
Jul 1, 2011I'm loading an xml document like this:
Dim doc As XDocument = XDocument.Load(FilePath)
I am then able to read the contents. However I need to get the namespace of the xml document. I can easily copy and paste it from the xml file and then import the namespace, but I'm building an importer class and I need to get the namespace so I can make my class as dynamic as possible.
VS 2008 Datatable To Class Object Using LINQ
Sep 29, 2011I have a datatable being returned by my DAL. In my BAL I want to return a class object. So I have a class called BusinessArea that has ID, Description and Active properties. I tried this:
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VS 2008 - XML Xdocument - Declaring The Variable
Apr 18, 2010I've got
Option strict ON
Option explicit ON
How should I declare the variable:-
Dim bounds as? = (From item In xml...<bounds>
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Retrieving PDF Document Stored In SQL?
Mar 6, 2009Ignoring the philosophy behind doing so...I have successfully uploaded PDF documents to an Image type column in SQL (2005). With VB.Net (winforms NOT asp.net) how do I get the PDF document back out of the database?What I would like to have happen is that when the Image data for the PDF is retrieved, I can present the user with a file dialog box to save the document locally. I am currently trying to use MemoryStream to manipulate the Image data coming back off the DB, but I'm not sure what to do with is after this point:
ImageBlob = CType(.Tables(0).Rows.Item(0)("Img_Data"), Byte())Dim ms As MemoryStream = New MemoryStream(ImageBlob, 0, ImageBlob.Length)I'm not sure what to do with "ms" at this point to accomplish what is described above.Alternatively, is there a better way to do this?
Asp.net - Complex Linq Query - Add A .Where() Or .Any() Predicate To Reduce Query Complexity (in VB)?
Sep 14, 2010I have to join two main tables, and I need to filter the results by elements in an ASP.NET web form. These filters are created on the fly so I have to use a lot of where extensions to filter the query. I want to execute the query with as optimized SQL as possible.
I am first doing a simple join between TW_Sites and TW_Investigators. Then there are two sub-tables that are involved. TW_InvestigatorToArea and TW_InvestigatorToDisease. While most of the where clauses are working fine, I have found a performance issue that won't be an issue right now, but will be an issue as the table gets bigger.
The arrays DiseaseCategories and DiseaseAreas would be the results of a CheckBoxList result.
Protected Sub LoadResults()
'Get Dictionary of Filters
Dim FilterDictionary As OrderedDictionary = Session.Item("InvestigatorFilterDictionary")
' Initialize LinqToSql
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LINQ Query Using The Dynamic LINQ Library?
Mar 31, 2011Forgive 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, _
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with the error "Overload resolution failed because no accesible 'Select' accepts this number of arguments."
Over the "NEW" I get an error " ')'expected."