I have Client-Server environment and developed a project for Client-Server.
I need to share a folder of my Server machine programmatically using VB.NET
Please help me.
Hello,
I am retrieving an image from the SQL database into Byte() variable in vb.net
Dim img as byte()=dr(0)
How do I create a file in my C:\images\ directory from the above img.
I want to read the img and then create a file with name bimage.gif
Please help
Hi,
I hope somebody can help me out on this question.
I'm using a SQL database and I'm writing a VB.NET client application. This application is used on multiple computers at the same time. If one of the clients makes an update to the database I would like to have the other clients to be aware of the update.
Has ony one already done this before?
Thank you very much!
Marcel
How to read excel file using vb.net..
I have a code to read the excel file but suddenly it crashes the output when I deleted some rows in excel file.. The deleted rows was also outputted in my coded program.
Can anyone help me on how to read excel file and ignore those deleted rows to avoid unexpected null output..
Consider the following situation:
WidgetCompany produced a .NET DLL in 2006 called Widget.dll, version 1.0. I consumed this Widget.dll file throughout my VB.Net application. Over time, WidgetCompany has been updating Widget.dll, I never bothered to keep up, continuing to ship version 1.0 of Widget.dll with my software. It's now 2010, my project is now a VB.Net 3.5 application and WidgetCompany has come out with Widget.dll version 3.0. It looks and functions almost identical to Widget.dll version 1.0, using all the same namespaces and type names from before.
However, Widget.dll version 3.0 has many run-time breaking changes since 1.0 and I cannot simply cut over to the new version; however, I don't want to continue developing against the 1.0 version and therefore keep digging myself deeper in the hole. What I want to do is do all new development in my project with Widget.dll version 3.0, whilst keeping Widget.dll version 1.0 around until I find time to convert all of my 1.0 consumption to the newer 3.0 code.
Now, for starters, I obviously cannot simply reference both Widget.dll (Ver 1.0) and Widget.dll (Ver 3.0) in Visual Studio. Doing so gives me the following message: "A reference to 'Widget.dll' could not be added. A reference to the component 'Widget' already exists in the project." To work around that, I can simply rename version 3.0 Widget.dll to Widget.3.dll. But this is where I'm stuck. Any attempts to reference types found in "the dll" leads to ambiguity and the compiler obviously doesn't have any clue as to what I really want in this or that case.
Is there something I can do that gives a DLL a new "root" Namespace or something? For example, if I could say "Widget.dll has a new root namespace of Legacy" then I could update existing code to reference the types found in Legacy.<RootNamespace> namespace while all new code could simply reference types from the <RootNamespace> namespace. Pipe dream or reality? Are there other solutions to situations this (besides "don't get in this situation in the first place")?
Hello
I didn't see a question on this subject in the archives, so here goes: For those of you experienced Mercurial users, is this a correct .hgignore file to tell VB.Net Express to ignore files/sub-dirs when adding items in a new repository?
bin
obj
temp
*.user
*.suo
*.ncb
Thank you.
I would like to add a virtual microphone (similar to how you can have a virual CD drive and then mount ISO files on it.) so that it can be selectable in programs like MSN and skype. But have the source of the audio be streamed from over a network(I know how to stream the audio over the network in VB.net) but how do I get that audio which has been streamed as the input to the virtual microphone?
Jonathan
I would like to add a virtual microphone (similar to how you can have a virual CD drive and then mount ISO files on it.) so that it can be selectable in programs like MSN and skype. But have the source of the audio be streamed from over a network(I know how to stream the audio over the network in VB.net) but how do I get that audio which has been streamed as the input to the virtual microphone?
Jonathan
I'm not sure if this valid C# but hopefully you get the idea. :)
switch (msg.GetType()) {
case ClassA:
// blah
case ClassB:
// blah 2
case ClassC:
// blah 3
}
How would I switch on an object's type but using VB.NET's Select Case?
I'm aware that some might suggest using polymorphism but I'm using a hierarchy of small message classes so that really wouldn't work in my csae.
I am having problems with deleting all records in a table with VB.NET. I am using this code to delete all records in the Contacts table
For Each contact In database.Contacts
database.Contacts.DeleteOnSubmit(contact)
Next
But I get this error
Can't perform Create, Update or Delete
operations on 'Table(Contact)' because
it has no primary key.
Anyone have any suggestions?
Thanks
Well basically I've got a vb.net script connecting to IRC, and I'm working on making it a basic chat system, but I've run into a problem.
Say I receive this:
:[email protected] PRIVMSG #channel :message
I want to grab specific information to output to the user.
I want to grab nickname and message
How can I go about doing this?
I thought about using regex, but I can't figure out how to make regex grab message since there's nothing after it.
Hello
I am importing Tables from a Oracle DataBase, using a VB.NET dataAdapter. I use the "fill" comand to add the imported data to a DataSet. How is it possible to define a specific column of a DataTable as PrimaryKey, after the DataTable is already filled with data?
Thank your for your help.
Hello,
How do I compress/decompress a string in VB.NET ?
I am trying to send long string through the Network and need them to be as small as possible before sending.
Thanks
I'm trying to create an application similar to the site WhatPulse, which will generate an image with my clicks and keystrokes. WhatPulse only updates the image once every 24 hours, so I am going to make an application to keep track of that for me, only with realtime stats.
How can I count total keystrokes (outside of the application itself) as well as total clicks, in vb.net?
This is for personal use.
Thanks for your help!
I cant seem to get VB to focus on a textbox correctly at the moment I did
TextBox.focus()
in the load event but still a button keeps grabbing focus anyway. Does anyone know why this would happen?
Hello,
I have this string in vb.net.
I would appreciate if you can let me know how I can enclose the values in double quotes
dim str as string=""
str.Append("EmpID=" & empNo & " DeptID=" & deptID & "")
I want the value of string to be EmiID="10" DeptID="20"
Thanks
Hi,
I want to execute a method on VB.Net to return a date which is in the stored procedure. I tried using ExecuteScalar but it doesnt work it retruns error
'Implicit conversion from data type datetime to int is not allowed. Use the CONVERT function to run this query'
Any help would be much appreciated please?
thank you
below is the code
Public Function GetHolidaydate(ByVal struserID as String) As DateTime
Dim objArgs1 As New clsSQLStoredProcedureParams
objArgs1.Add("@userID", Me.Tag)
objArgs1.Add("@Date", 0, 0, ParameterDirection.Output)
Return (CDate(ExecuteScalar(clsLibrary.MyStoredProcedure.GetHolidayDate, objArgs1)))
End Function
Hi all I have this code to check if an item from a textbox is in a listbox and its giving me the error at the bottom. Any ideas what im doing wrong? I copied it from another part of my project and it was working for that part so I cant see whats wrong.
If LocationsSearchTextBox.Text <> "" And LocationListBox.Items.Count > 0 Then
tempInt = 0
While (tempInt < ClientListBox.Items.Count)
If LocationListBox.Items(tempInt).ToString.Contains(LocationsSearchTextBox.Text) = False Then
LocationListBox.Items.RemoveAt(tempInt)
End If
tempInt += 1
End While
End If
System.ArgumentOutOfRangeException was unhandled
Message="InvalidArgument=Value of '2' is not valid for 'index'. Parameter name: index"
ParamName="index"
Source="System.Windows.Forms"
StackTrace:
at System.Windows.Forms.ListBox.ObjectCollection.get_Item(Int32 index)
at AuctioneerProject.Viewing.LocationsSearchTextBox_KeyPress(Object sender, KeyPressEventArgs e) in C:\Users\admin\Desktop\Auctioneers\AuctioneerProject\AuctioneerProject\Viewing.vb:line 301
at System.Windows.Forms.Control.OnKeyPress(KeyPressEventArgs e)
at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
at System.Windows.Forms.Control.WmKeyChar(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.TextBoxBase.WndProc(Message& m)
at System.Windows.Forms.TextBox.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(ApplicationContext context)
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
at AuctioneerProject.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ThreadHelper.ThreadStart()
InnerException:
I'm trying to Shell with a Wait or Process.Start() in VB.NET ASP.NET but it just runs forever. If I don't wait it runs fine and exits normally. What am I doing wrong?
ReadToEnd, WaitForExit do not work. I'd much prefer to avoid delegates if possible.
Hi people,
I have three projects written with VB.NET (2005) and have to convert them to C# code. (I know that i don't need to convert codes of .net languages at all). I have no time to rewrite them, need a tool or script to convert.
Note: they are console applications.
Why is the following VB.NET code setting str to Nothing in my VS2005 IDE:
If Trim(str = New StreamReader(OpenFile).ReadToEnd) <> "" Then
Button2.Enabled = True
TextBox1.Text = fname
End If
OpenFile is a Function that returns a FileStream
What is the VB Equivalent of the following C# boolean expression?
data.GetType() == typeof(System.Data.DataView)
Note: The variable data is declared as IEnumerable.