I write programs in VB 2010 which uses .Net Framework 4.0. However my school currently only has .Net Framework 3.1 (3.something, think its 1)Is there anyway i can "downgrade" the needed .net framework, or even just select another .net version to use?
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I have a clickonce application that's already deployed to ~30 machines with .NET framework 3.5 as a prerequisite. I now want to remove the 3.5 prerequisite and opt for a 2.0 prerequisite without messing up my existing installs/deployments.Are there any pitfalls in doing this that I should know about? I really don't want to have to force all old users to re-install.
View 7 Repliesi have a component developed in dot net if i want to find out the dot net framework required for that component to run, how can i find out?
i know we can detect the framework installed on a system, but here i have a dot net component, and want to find out which framework is needed for it to run?
I am creating a program in VS 2010 which obviously uses Framework 4.1 However now that I am trying to test the program I am realizing usually only developers like us have this version.. Is there any way to downgrade the needed version of the framework for my program Currently I run it on my test computer and it asks me to download 4.1 version.
View 4 RepliesI have a simple application that stores settings using My.Settings. When built using .Net 4.0, it works fine. If I change to build with .Net 3.5 Client (or just .Net 3.5) I get an error 'An error occurred creating the configuration section handler for userSettings/My_Application.My.MySettings: Could not load file or assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089''.
How can I build an application for PC's that do not have .Net 4.0.
Im having a problem with my program which was coded in VB.net 2005. My pc is windows XP with MS Office 2003. My program works fine for users with 2003 Office but has errors on users with 2000 Office. I was able to downgrade my pc to Office 2000 so my program would reference to MS office 9.0 (2000). This proved to be successful since both 2000 and 2003 users can now print properly. The problem now is my development pc cant create any word.application ...
on this part...
Friend mWordObject As Word.Application
Dim oWord As New Word.Document
mWordObject = CreateObject("Word.Application") '- where error
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I am work on VB.net 2003 Framework 1.1 for last 3.5 years in windows Application.We are currently migrating to VB.net 2008 framework 3.5, but i don't know about the features which related to ADO.net and which is important to performance. I know linq to SQL but our architecture is made in .net 2003 so we should follow this.Any features which is very important to enhance the performance?
View 2 RepliesI have a executable that connects to a remote database using MySQL connector so it uses the MySql.Data.dll would like to know if I can somehow call the dll only when needed so I don't have to import itwhy I want this?well for example if the MySql.Data.dll is missing the executable just crashes without any details
View 11 RepliesI have a solution that I wish to upgrade from Vb.net framework 1.1 to framework 4.0. The solution consists of a number of projects, all but one of which compile to dll's. The master project compiles to a executable which provides a menuing system which dynamically loads the dll's and connects to entry points.
The projects contain normal classes, numbers of forms and also controls, which are either usercontrols or are inherited extensions of standard windows controls.There are a number of third party components (eg reporting and grid controls from Component One, Ribbon control from DevExpress etc).
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how to calculate how many cards are needed at least to make a straight in texas hold'em?
pratic examples:[code..]
Obviously error handling is a major factor in making a good application. If a error happens letting a user know what has gone wrong.But some times error handling may(i think) not be needed. Example.
Private Sub RemoveCheckedl()
Try
For Each Item As ListViewItem In lst.CheckedItems[code]....
also when error handling it's could to think about what type of errors could be made.
Catch ex As Exception
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
even though this catches the error and displays a msg, it may not be a great message for the user so he/she can understand.
I really need to create very huge 2D matrices such as 5x5, 10x10, 7x7 and use them for basic Matrix calculations involving Matrix multiplication, Transpose and Inverse.
View 2 RepliesI have just downloaded Visual Basic Express 2008, I have previously only ever used access and I have a rather stupid and basic question to ask! I have a button and am trying to enter the very simple code so that when it is clicked it opens Form2, I am unsure as to how this is written as the "expression" I would have used in access obviously doesnt work.
View 2 RepliesI'm wondered how to make program that not needed to install. Only click the icon and its working and resource folder too. When I'll do build program it makes program thats needed to install.
View 4 RepliesI am trying to print a Rich Text Box in VB.Net. There is a good example at:BUT, when I copy the code I get errors onImports System.Windows.Controls
View 3 RepliesOn my emailer program ive created a messagebox to appear if any of the textboxes are empty when i clcik send, its works fine (first time) but if i leave a textbox empty for the second time and click send i get an error.[code]
View 20 RepliesI have 3 arrays setup for use in my program. The first array has item level detail and will have a known number of elements. The second array has more of a table level detail and will have an unknown number of elements that will need to grow as the user enters data The 3rd array will also be of unknown size but matching the second array and will be used for indexing purposes at runtime.The question is what would be the best and hopefully fastest way to keep these arrays as small as needed while being able to add new elements on the fly without rebuilding the entire array. Ideally I would like the code to run as fast as possible in as little memory as possible.
View 9 RepliesThe program has 3 list boxes and the user is supposed to choose an option from the 1st and 2nd list box and add the total in the third list box, when i run the program all i get is $0.00. I was told a loop was needed, but I'm not sure where I need to put it and what kind of loop I nee
Dim Day As Integer
Dim Total, Fee, Stay As Double
Dim Workshop As String = lstWorkshop.SelectedIndex()
[code]......
How come software created in an older framework version won't run on a newer framework version? Actually whenever i try to run some old specific software having .net 3.5 framework on my PC they show they needs .net framwork 1.1 . What a bad thing?My newer version of Photoshop ans Ms office open all lower version files.
View 6 RepliesCould anyone give me the prequisites needed for a LAN Instant Messaging Application?And then, if possible, a step-by-step explanation of how this is accomplished, or a link to a good tutorial?
View 3 RepliesI have a project to do in Visual Basic.My problem is that the outcome is always wrong (ex. instead of 2011 it gives 2000). And i cannot set as Desired unit the Inch(1) or feet(3), it gives the Infinity error. And if i put as Original and Desired unit the inch(1), the outcome is "Not a Number".[code]
View 2 RepliesI'm just starting to really get into JSON as a tool for my sites. I was showing my friend how I am calling a WS and returning the data, and he asked me about security of passing JSON data to and from a web service as he saw the data from the "POST" (via Firebug). Many of our public facing sites deal with member information and contain PHI.
Can I encrypt the JSON data and then unencrypt it? Is that a good way to go about it to ensure a layer of protection? Or is there another "better/right" way of doing it? Or are his concerns unfounded? how to encrypt or secure the JSON data when needed? Just trying to gather as much knowledge as possible before I go down a path that won't work for the company.
I have a multiline text box which I only want the scrollbars to appear when the textbox is full.
I have tried this code but itdoesn't seam to work.
Private Sub txtBuilderDscpt_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
Static busy As Boolean
If busy Then Exit Sub
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I have a dropdown list box that displays data from my database. Problem is that some records are quite long so the width of the dropdown box extends past the side of my screen. I have a reasonible width set but it is not stopping the dropdown box from getting as wide as it needs to display each record. How can I set a fixed width on this?
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True"
DataSourceID="SqlDataSource1Usage" DataTextField="data_text"
DataValueField="ID" Width="280px">
</asp:DropDownList>her
How can i mask NIC number while eneteing NIC information???
View 1 RepliesWell a mod closed my topic in ASP.NET. I tried to move it there since this probably has more to do with ASP.NET. Anyway here it is again. ng the method takes more parameters than I created.
Web service project -
Method header in IService.vb:
1Function GetValue(ByVal country As String, ByVal amount As Decimal) As Decimal
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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 know how to genrate a serial number using GUID. How can I use it. Suppose I send a CD with the software to someone. I do not want just anyone to use it. They have to have the KEY or SN. How can I impliment it so that if you do not have the s/n / key then you will not be able to install the software.
View 4 RepliesI am still trying to accomplish a tiny flatfile based database. So far everything works fine except for the fact that 'data records' are not sorted alphabetically. My 'data records' are saved in files and their filenames are used as ID. Now all the data are stored iin the files, so, my application reads out the values and adds them to the 'database'. Unfortunately, I couldn't find any way to sort this added data alphabetically by name - everything else works perfectly and I am almost finished, except for the sorting.
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My question now is how can i add a screen where the user must enter a product key before he/she can use my program?
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