I am trying to port the folling C# Linq statement to VB.NET. I can't seem to find any equlivant for Select((asm, idx) => new { asm, idx })
List<AssemblyReference> assemblies =
(
from asm in loadList.Assemblies.Select((asm, idx) => new { asm, idx })
[Code]....
I need to update (well, rewrite really) a SMALL VB6 application which uses ADO to access a JET database, to a vb.net app in Visual Studio 2008. My research suggests that I should use LINQ, but it doesn't seem to be possible to connect to JET. If JET is now deprecated, what should I use? Or should I use ADO.NET without LINQ?
Please don't answer SQL Server! - this needs to be an app that end users can install easily in corporate or non-corporate environments, and must not require any ongoing technical maintenance. I started to install SQL Express, but stopped when it required at least 2 system updates, as that will be far too complex for this little app.
I have a bit of code which is causing me a few problems to port from C# to VB.NET
The C# looks like this
byte[] serverbuff = new Byte[1024];
int count = 0;
while (true)
{
[code]....
I'm working on porting some classic VB6 code to C# and just stumbled across a usage of the PV function.I feels wrong including a reference to the Microsoft.VisualBasic Assembly. Is this something that is commonly done, or should I explore further options. The next idea that pops into my mind is exploring this PV function in Reflector.
View 3 RepliesPossible Duplicate: Porting VB.NET Winforms Application to C# .Is there any way to convert a vb.net winforms application into c# ? In terms of both code and .vb (forms) files.
View 2 RepliesI have the following code in a VB 2005 project that works fine:
Imports System.Text.RegularExpressions.Regex
Do While intIndex >= 0 'Or Not boolMatch
If IsMatch(strTitle, Trim(arrTitle(intIndex)),
[Code].....
I've been wondering about this for a while, but is there actually any free way to port VB.net apps to OS X and Linux? I've searched the web for this and couldn't find anything much.
View 5 RepliesI'm working on some legacy VB5/VB6 code and need to convert a ".bas" file to vb.net. i found several options
Compile the .bas file into a com dll and then reference and use it in my project. (For this I guess I would need vb5 or vb6 which I don't have at my disposal) Copy and paste the contents of the file in to a new module in vb.net and then try solving the errors one by one.The contents of the .bas file reference a particular dll. The .bas file has mostly declarations consts, types, sub's and functions.
What would be the most elegant way of redoing this in vb.net. Is it as simple as option 2.EDIT
I used VS2008 express and ran the code through the upgrade wizard it did the necessary conversion. and the .bas file was converted to .vb. I took that file and decided to rewrite other parts of the code, including some redoing of the converted .vb file. Other questions related to this one are here.
We are looking to port our existing classic ASP application to .NET, but we're unsure of what language to use for the new app. I personally would 'prefer' C#, as I'm more familiar and comfortable with that languages way of doing things, but, the original code is VBScript, so it would possibly be easier to port to VB.NET ... One possible situation I fear would be that, because the code is so similar between the two variants of VB, that we might end up getting stuck on something that is not similar between the two, even though it looks like it would work. A shift to a wholly different language might avoid that kind of situation. Does anyone have any practical examples of this kind of situation? Insights to illuminate the issue with? Do the potential benefits of a complete paradigm shift outweigh the gains from a high degree of 'copy-and-paste-ability' ?
View 9 RepliesI am porting a vb6 application to VB.net. One of the key forms has a large msflexgrid on it - about a 1000 columns and 50 rows. It has 2 header rows - the first header row has merged cells to form a main header and the second row has sub headings. There is no requirement for any data entry and it's unbound. The code does the work in deciding what to display (if anything) in each cell. It is solely used to display data in the form of a character and a coloured background and to display a tooltip text with more information when you mouse over it. Works beautifully in vb6. I'm trying to decide whether to:
a) use the vb6 msflexgrid in the .net version
b) use the datagridview - which at a first glance seems to have a problem merging the cells on the header row
c) build my own custom control to do the job
I've got a VB 6 application that I ported over to VS 2005. The application has a toolbar on it. When building it in VB 6, I created all the bitmaps for the toolbar. And they looked just fine.Now I have ported to VS 2005. The toolbar works just fine. But the images in the toolbar look "wrong". The best way to describe them is if you took each bitmap and squeezed it down to about 67% of it's size. So it is missing the detail it used to have. And the smalleer picture still takes up the same amount of space on the toolbar. It is just that each squeezed bitmap now looks like it has a thick, blank pictureframe around it.
View 5 RepliesI developed an application using VB .NET on a Windows OS. If I want to enable this application for a client who uses Linux , how do I do so? Do they need to purchase VB .NET? I am totally lost on how this works.
View 5 RepliesI am trying to decode yEnc data using the component found here:[URL]...It all converts fine, except for Line 173 of Decoder.cs which contains the c# keyword "unchecked".Without using unchecked I get an OverflowException.What is the correct way to implement this in VB?
[Code]...
I created an application for Windows XP, now it needs to run on Windows 7. I have had some issues to resolve, but rather small ones. I am now stumped on this one... Here is my code block
vb.net
Private Shared Sub RenameFileAfterDownload(ByVal File As String)
Try
[code]....
The code works perfectly for Windows XP, but the ftpRequest does not work in Windows 7 for renaming. That said, the code runs that entire sub becaues WriteToEventLog get's written, but seems to ignore the ftpRequest lines.
I make loads of programs in visual basic, but it happens that my friends that want to try some, have Windows XP or Vista, when I have Windows 7 on the computer where i create them.I tried to launch the application compiled on 7 on their PCs but it just doesn't work. Is there any way to port programs from Windows 7 to other version of Windows? Or just to find a way to make them run?
View 9 RepliesI've been asigned to a new project. I have to mantain an application wich was made in Visual Studio 2003 (VB.NET, Framework 1.1) and Crystal Reports wich came included with the IDE. The application is absolutely what we call "legacy code" :).Just to make the test, today I've tried to convert the application in Visual Studio 2010. The converter is offering me download SAP Crystal Reports, with no cost and no registration.The question is: Does anybody has experience with this components?. Is feasible to migrate an application as described to VS 2010?
View 1 RepliesI am porting Excel VBA to VB.NET. I have a function that takes a selection of data, and it may be one dimensional or two. VBA code is quite fluid about using a variable as either a 1-D or 2-D array, but VB.NET marks it as an error.
Here is the reduced code:
Public Function Stat(ByVal Data As Range) As Object
Dim Y() As Object
[code]....
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
if there is that much of a performance gain in running a LINQ stored procedure versus a LINQ query?
View 1 RepliesI 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].....
Example-I have a person class
Public Class Person
Private _fname As String
Public Property Fname() As String
[Code]...
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."
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]....
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.
How can I convert this code LINQ to SQL in C # LINQ to SQL in Vb.net
[Code]...
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.
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]....
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.
I 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.
I recently switched from VB to C# and have, for the most part, been able to make the transition without too much trouble. Currently I am working on converting a VB.Net program into C# and am having trouble with a couple of code blocks that include Linq.
This is one of the VB.Net lines of code that I am having trouble with:
I have tried to do the same thing in C# like this:
I am getting a compile error on the dt, which says Could not find an implementation of the query pattern for source type 'System.Data.DataTable'.'GroupBy' not found. VS also has issues with the whole into Emailers = group;
I have tried to get this right using examples from my search but have not been able to get it right.