Make The Code Working Without LINQ?

May 15, 2012

I have this code to get images width and height from header file without full loading the image..I convert it automatically from C# to VB.NET by [url]....The source C# code here:http:[url]....

Now I need this code to work with .net framework 2.The code doesn't work after converting even with .NET 3.5

Imports System.Collections.Generic
Imports System.Drawing
Imports System.IO[code]..........

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How To Make CustomClass Save Changes Working In LINQ

Sep 26, 2011

I am trying to get Linq going on. I have a CustomClass named Ordr with the properties OrderID, EmployeeID, _ShipRegion

I do a simple query:
Dim query = From c In dbcontext.Orders _
Where c.EmployeeID = 2
Select New Ordr With { _
.OrderID = c.OrderID, _
.EmployeeID = c.EmployeeID, _
.Shipregion = c.ShipRegion}

Then I bind this query to a DataGridView:
DataGridView1.DataSource = query

Now, when I try to save any changes with dbcontext.SaveChanges() no changes are saved. OrderID is the primary key. How was I supposed to do it properly without loosing the ability to save changes?

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Make A REAL Key Generator - Program Code To Building A Working Keygen ?

Jun 24, 2009

I've been trying to create a working keygen for three months and I havn't figured it out. I first inserted two buttons and named one "Generate" and the other "Exit" and then I put in a textbox. After that I put in the code and debugged it every time I pressed the Generate button a 0 just popped up in the textbox. my code is below.

Public Class Form1

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

[CODE].....................

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VS 2010 Upgrade From 2008 To 2010 - Now LINQ - IntelliSense Is Not Working For LINQ Stuff

Apr 20, 2010

I just upgraded a project from VB 2008 to VB 2010. Before, the project did not use LINQ. I have started implementing it. So, I have updated the target framework from 2.0 to 3.5, and added a reference to System.Core, and imported the namespace System.LINQ to the entire project and also imported System.Data.LINQ into the form I'm working with (because it was not available in the list for Imported Namespaces in the references tab).

It's not throwing any errors now, but my IntelliSense is not working for LINQ stuff.

For example... I write this:

[CODE]....................

Then, if I type S. on the next line, the IntelliSense doesn't grab what it should for S (Only get Equals, GetHashCode, GetType, ReferenceEquals, and ToString, instead of the options I should get like Count, First, FirstOrDefault, etc...). If I Type S.First. then its the same thing, no IntelliSense that lists the available fields for S, just the standard options (Equals, GetHashCode, GetType, ReferenceEquals, and ToString). I should be seeing my column names in my table when I type S.FirstOrDefault.

So any ideas what is going on? When I type the code, for example, MessageBox.Show(S.FirstOrDefault.FirstName), it works perfectly. But it doesn't change the casing of the text (so it would read s.firstordefault.firstname) and no intellisense while doing it. But no errors. BTW - Everything works perfectly when creating a NEW VS 2010 application, it's just my projects upgraded from Visual Basic 2008 that have this issue.

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UnhandledExceptionEventHandler Samples From Msdn Working, In My Code Not Working?

Sep 3, 2009

I found on msdn samples and modified (add Thread.GetDomaind.UnhandledException)

<SecurityPermission(SecurityAction.Demand, Flags:=SecurityPermissionFlag.ControlAppDomain)> _
Public Sub Main()
' Add the event handler for handling UI thread exceptions to the event.[code].....

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Linq Not Working After .Net 2.0 To 3.5?

Jan 15, 2012

I started developing an application several weeks ago and decided today that I may want to use LINQ. So I changed my project from .NET Framework 2.0 to 3.5 and restarted the program. However, I can not get the most basic LINQ statement to work. I thought it was my code until I started a blank .NET 3.5 project and inserted the basic code (below) which worked without issue. So I then started another .NET 2.0 project and inserted the code (which I knew wouldn't work) and the errors are the same as the project that I converted. So next I converted this new .NET 2.0 to 3.5 and the code still doesn't work. So migrating from 2.0 to 3.5 isn't working for LINQ.

My question is: If one changes from a .NET 2.0 to a .NET 3.5 how do they get LINQ to work properly?

[Code]...

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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]...

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.net - Linq To AD Query Not Working?

Sep 20, 2011

user.fld_usr_name is a string with the value random name user is an object that is given as a parameter

ByVal user As GUser

this is the linq query that doesn't work

Dim result = (From usr In users Where usr.Name.Contains(user.fld_usr_name) Select usr).ToList()

this is the one that works

Dim result = (From usr In users Where usr.Name.Contains("random name") Select usr).ToList()

this is the error

Object reference not set to an instance of an object.

I am using this in Linq to Active Directory library which probably means it's linq to entities I've tried everything?

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Asp.net - LINQ Intellisense Stopped Working?

Feb 13, 2010

What happend to my Intellisense?When I type a line like this ...

Dim users = (From u In Membership.GetAllUsers Select u.UserName)

I get (almost) no Intellisense when I get to the Select u. part. Only Equals, GetHashCode, GetType, ReferenceEquals and ToString appears. Not "UserName" and the other relevant propeties of the MembershipUser class.The code compiles and works just fine.

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Asp.net - Serialize Linq Objects Not Working?

Apr 14, 2010

Using the following code:

Private Sub MakeMeSomeXmlBeforeRyanGetsAngry()
Dim db As New MyDBDataContext
Dim customer = From c In db.Customers Select c

[code]....

I am attempting to serialize my linq collection of customers. But it keeps throwing

Type 'System.Data.Linq.DataQuery`1[MyDB.Customer]' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. See the Microsoft .NET Framework documentation for other supported types. My issue is that I have already marked the dbml Serialization Mode to UniDirectional and when I check the dbml codebehind all of the DataContract()> and DataMember()> elements are there. I have tried adding various dataloadoptions and setting deferredloading to false, but no luck.

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LINQ To SQL Update Not Working Correctly

May 11, 2009

I use the following statement to position which row to update;
Dim salonToUpdate = (From r In db.Salons _
Where r.StoreID = storeID _
Select r).Single()
If fileDate = #1/1/1900# OrElse fileDate = Nothing Then
SalonToUpdate.LastDownLoadDate = TableDate
[Code] .....

I've double checked to make sure none of the dates are invalid or null, but when the bolded statement executes, the following sql runs through the trace:
exec sp_executesql N'UPDATE [dbo].[Salons]
SET [LastDownLoadDate] = @p0
WHERE 0 = 1',N'@p0 datetime',@p0='2008-01-04 00:00:00:000'
Of course it's going to fail if LINQ is passing in where 0=1 every time. Shouldn't it be using some unique row identifier, (in my case, the salon id), to update the specific row?

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.net - AndAlso In VB Linq Query Doesn't Seem To Be Working?

Sep 14, 2010

The below query fails with Null Reference Exception when there are elements in BOMIDs where MatID property is nothing.I thought the 'x.MatID isnot Nothing AndAlso' would prevent the x.MatID.Process part of the where from being executed. There are a couple elements in the BOMIDs collection that where MatID is nothing.

From x In BOMIDs _
Group Join y As PurchasedProcess In SpecialProcesses _
On x.MatID.PurchasedProcess Equals y.Name _
Into G = Group _

[code]....

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Join Doesn't Working In LINQ In Devexpress XPO

Nov 23, 2011

I have used persistance class and used following LINQ query.[code]but it throws an error saying. "Specified Method is not Supported".How can i get data from two table using XPO Persistance Class?

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Forms :: TextChanged Code And Button Click Code Not Working?

Jul 2, 2009

I have made an application in VB.NET.The Button click codes are working fine. I have made a small modification in the code. I have commented the line 'Me.Close'But still my form gets closed. I think the application is executing from elsewhere.

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C# - Linq Group By With Anonymous Types Not Working As Expected?

Jul 14, 2011

I was toying around with some of the linq samples that come with LINQPad. In the "C# 3.0 in a Nutshell" folder, under Chater 9 - Grouping, there is a sample query called "Grouping by Multiple Keys". It contains the following query:

from n in new[] { "Tom", "Dick", "Harry", "Mary", "Jay" }.AsQueryable()
group n by new
{

[Code].....

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Working With Types With Linq In VB, C# - Dim LoTupleSetDifference = LoTupleKeys.Except(loTupleExistingKeys)

May 6, 2009

Say I create two sets of tuples like so:

Dim losSPResults As List(Of spGetDataResults) = m_dcDataClasses.spGetData.ToList
Dim loTupleKeys = From t In losSPResults Select t.key1, t.key2

[CODE].....................

Now I want to perform set operations on these two lists like so:

Dim loTupleSetDifference = loTupleKeys.Except(loTupleExistingKeys)

Obviously, Linq can't perform a comparator on sets if it doesn't know the sets have uniform definitions, so it will give me this build error:

Option Strict On disallows implicit
conversions from
'System.Collections.Generic.IEnumerable(Of
< anonymous type>)' to
'System.Collections.Generic.IEnumerable(Of
< anonymous type>)'.

How do I work with the declaration of these sets to make them mesh?

Still getting the same compile error:

'*** If we have initialized the list of tools, check to make sure it's up to date Dim loTupleDatabaseTools = From tt In lottTorqueTools _Select StationIndex = tt.station_index, SlotNumber = tt.slot_number

[CODE]...............

Error is here:

Dim loTupleSetDifference = loTupleDatabaseTools.Except(loTupleToolObjects)

Error 5Option Strict On disallows
implicit conversions from

[CODE]........................

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Make Application Working Better And Never Freeze / Make Application Working With Any Count For Loop Without Freeze

Jan 19, 2012

I'm using loop to read data from sql and then make some calculations then save it again to another table but when application loop for 3 or 4 times it's freeze but the job is done but if loop = 10 or more then it is freeze and hangup for long time .i need to learn how to make my application working better and never freeze and make application working with any count for loop without freeze .

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Linq Query On Dictionary<TKey, TValue> Working As DataSource?

Dec 21, 2010

I have the following in VB:

Dim sources = From source In importSources Select New With _
{.Type = source.Key, .Source = source.Value.Name}
dgridSourceFiles.DataSource = sources

[code]....

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Working With System.collection.generic.Ienumerable/XML Linq Queries?

Oct 22, 2009

This is really a continuation from my earlier post. I've never worked with this datatype/collection (system.collection.generic.Ienumerable) before so I'm struggling to declare the query globally so I can reference the results within other sub routines/functions. I also am struggling to convert it to other types.how I can convert the collection of xml elements/system.collection.generic.Ienumerable into an xmltextreader (I know I will have to change the query below as it select the value of the node and not the node itself) I imagine by converting the query result to system.IO.stream My first port of call was MSDN but I find the material very difficult to understand for this particular subject.

[Code]...

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.net - Working With The ObjectQuery Single Enumeration Challenge In Linq-To-Entities Entity SQL?

Dec 30, 2011

I'm working on modifying this example:

Using advWorksContext As New AdventureWorksEntities
' Call the constructor that takes a command string and ObjectContext.
Dim productQuery1 As New ObjectQuery(Of Product)("Product", advWorksContext)

[code]....

An ObjectQuery can be enumberated only once. (Subsequent attempts at enumeration throw an exception.) The enumberation takes place in the for each statement. The problem is that if the query is empty attempting a For Each will throw an exception. But if I check for a count:If productQuery1.Count > 0 Then . . .

That eats up my one chance at enumeration. I could nest the For Each in a try/catch block and throw away the empty query exceptions, but that's ugly.

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How To Convert Code To LINQ

Feb 21, 2009

I'm trying to write this as LINQ, [code]I'm a LINQ beginner, so far I'm not quite sure where to use and where not to. If in this case LINQ will do more harm then help, feel free to flame me.You can assume that there is an overload for AddLink() which takes IEnumerable

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Code Is Not Working When Using Run As

Feb 27, 2012

One of the buttons in my application maps a network drive.The code for it works fine when I run the application normally, but when I do a RunAs with other credentials, it does nothing. [code]

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Convert The Following VB Code To A LINQ Statement?

Oct 8, 2009

I only want to return a certain number of rows into the DataTable via LINQ's Take or use it on the Rows property, but I am not sure how or where to do it: Here is the current code:

Dim dt As DataTable = GetDataTable("sp", params)
For Each dr As DataRow In dt.Rows
Dim o As New OR()

[code].....

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Populate A LINQ Table In Code?

Mar 2, 2011

I want to populate a LINQ table from code, not DataBase.Is it possible ?System.Data.Linq.Table<Question> myquestions = new System.Data.Linq.Table<Question>();

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Make Code Which Can Make Copying A File In A Particular Drive Invalid/access Denied?

Aug 29, 2009

can we make code which can make copying a file in a particular drive invalid/access denied?

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Get HTML Code Not Working?

Apr 23, 2012

When i run this code to get results from yahoo or google it does not work and it says that that ids not there but it always is."Object reference not set to an instance of an object."

Public Class Form2
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles

[code].....

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MDI Form - Code Not Working

Apr 21, 2011

My MDIparent (MDIParent2) has a specific form(Webtab) as it's MDIchild, Webtab has a webbrowser control inside but I can't use the following:

Private Sub Button1_Click(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles Button1.Click
activemdichild.webbrowser1.goback
End Sub

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Regex Code Not Working

Apr 2, 2009

I have written a short piece of code to validate a UK NI number. The format is 2 upper case letters, followed by 6 digits followed by A,B, C or D. This code does not work, it never matches even when the string NI_Num is OK: [code]

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VS 2008 Code Not Working?

Aug 17, 2008

Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs)
If WebBrowser1.DocumentText.IndexOf("FAILED LOGIN") > -1 Then

[code]....

Now the number 40 shows up in the web broswer so why isnt the ELSE showing the message box saying Login OK and the others?

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VS 2010 Code Is Not Working?

Jun 16, 2010

but i used this to check if its true

Dim returnValue As String = html
Label4.Text = html
If Label4.Text = "true" Then

[code].....

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