I have got 2 forms, Form1 and Form2.I called a function that was located on Form2 from Form1, and want to return the value that is in the function on Form2, to Form1. How do I do this?I have tried the following.
Form1
Call Form2.Needfps()
fps = Needfps
Form2
[code]....
ok here is the thing, in my application there is 2 forms, in the main one (not an MDI)it has some textboxes and a picture box, the other small form contains only a ser enters his search criteria in the textboxes in the main formand presses a button to show the results,t opens the second form and displays the results inthe listview(results are names of pictures).
View 2 RepliesHow can I call a function from inside another function and suspend the calling function until the called function is finished? I hope I can get some replies because I don't know how to ask the question and make sense:).
Anyway what I am trying to do in steps:
1. The user clicks button1 which triggers the click event.
2. From the click event I call a function
3. I then pop-up a form, that has instructions for the user to read.
4. After the user has read the form he will click the "Done" button and return to the calling function.
The problem is the the calling function continues to execute. I want to stop execution of the calling function until the users clicks the "Done" button on the instruction pop=up. I know I can use a msgbox but the instructions can be lengthly and does not look good in a msgbox.
I have tried the Call method with return in the "Done" button click but I can make that work. I also tried a goto statement but I can get that to work either. In the call statement I said call frmInstruction.show() and it got there but as I said the calling function continued to execute.
it might help to change the forum name to Visual Basic .NET General Forum. or VB.NET General Forum maybe would help the vba and vb6 developers know this is not for them.
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If a subroutine is called within a function, does the function always wait until that subroutine is completely finished before it will proceed with the rest of the function? If so, is there any way to make it not wait and continue on with the rest of function and not care what happens in the subroutine?
View 3 RepliesI am trying to convert a DLL function call which has the Callback function routine called within the DLL function call.The DLL function call signature is like this:
typedef void *HANDLE;
typedef HANDLE HACQDESC;
DECLARE_HANDLE (HWND);
[code]....
how to convert this DLL call to VB.NET and also how to create the callback function and send it as parameter to this function
call.
I know that if i have a using block like
using myresource
return 0
end using
myresource will be disposed .
But if my using block is
using myresource
return myresource
end using
Will myresource be disposed?
I am wondering if a similar using block is causing memory lead in the app.
thanks
I've got a basic logon form where if you enter the right password/username, it redirects you to the "MainMenu" Form How can I make a function called "checkLogon" that checks the username/password text to a variable in that function?
View 3 RepliesI have a website where people send each other messages Recently I noticed that sometimes the same message is sent more than once
For example, a message is sent four times within three seconds or twice within a second.I do not understand how this could happen, once the user clicks on the button that sends the message .So all the window switches and a message showup saying "the mail is sent successfully." I checked that if the user refreshes the page after it sends a message, then really the message is sent again.But I do not think that's the case, becouse the message is sent twice within one second.I am writing in vb.net and using mysql data base.Maybe it's related to the queue for the db, i do not know.Here's the code:
Function calls:
Call GlobalFunction.update_mailbox_table(user_id, receiverId, txtMessage.Text, private_picture)
the insert function
Public Shared Sub update_mailbox_table(ByVal user_id As Integer, ByVal receiverId As Integer, ByVal message As String, ByVal[code].....
I have a function that takes some meter measurements. If the values are not close enought I want to run the function again until the values are close enough, or until the function has been executed "X" amount of times.
View 3 Replies<edit on 10th March 2010.>
Changed thread type to QUESTION. I was then able to mark AS ANSWER the relevent post which now also immediately follows this post and so it is easier to find as suggested by forum user j2associates .
<edit> It is also my 3rd post in this thread, the 8th one up, of my posts, from the bottom ( for now ), as the forum format has changed yet again.I will leave the rest of this post( as is ) purely for historical reasons. I have been on these forums long enough to see 3 forum changes. <edit> 19th May, 2010> Link added to a video on the next line of text.
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I have a function to pull data from a XML, and to report a specific number based on a value in one of the elements in the XML. Unfortuntately, I can't get any break points to work, so I've been debugging with a trace.he strange this is that when i take out the function itself it works like it should, otherwise the Service freezes when it gets to the function and never uses it. I'm calling the function in while loop which is also within a Try Statement, here's example of the code.
Public
Shared Function GetXNumber(ByVal
audit As Audit.API)
[code].....
Okay so what im trying to do is make a simple particle system in VB (Yes i know this isnt a ideal setup). Im going to have particles dieing and spawning new ones tho, To do this i need to be able to pass a function to the particle when its created then call that function when it dies. Is there a way to do this by passing function pointers?
View 9 RepliesI have the following statement and the function 'InitialiseOsTransform' is in a Module which is in the project.
If InitialiseOsTransform() = False Then But instead of the code going into this function it goes into the Paint function.
I have used the similar code in another project and it works correctly.
I am wanting to perform certain processes before the program closes. I can get them through the File > Exit part of my menu, but I can not find the VB6 form_unload equivalent in VB2010. I have tried Form_QueryUnload but it never gets called when I close by using the RED "X".
View 12 RepliesJust so it's known, this question is mostly academic, even though I tried to use the concept in a real-world solution. I realize the example is contrived, but I believe the concept is valid.I want to write some fluent code like this:
[code]...
I realize that I can't force an anonymous type into a specific type (like implementing an interface or some other class), and I don't want the overhead of defining a specific class just to match my desired fluent name with the actual method name. So I was able to make the code work like this:
copy(my_first_file).to.Invoke(my_second_file)So there is no IntelliSense or type awareness there, and I have to include the Invoke in order to have the method run. How can I get more type safety and exclude the Invoke method, under these constraints: Anonymous Type returned from Method No additional classes or interfaces Preferably, I do not want to pass in another parameter to the copy() method that tells what type to return, unless copy becomes a generic method (but I think that means defining another class/interface, which I don't want to do)
Net_mang_Form.Prg_bar.Visible = True
Net_mang_Form.Prg_bar.Value = 0
Net_mang_Form.prg_Timer.Start()
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Here Net_mang_Form is Form1 and this code is written in button click event of Form2.
file_send is the function of dll .
prg_Timer is the timer control .
Prg_bar is Progress bar control.
Consider I have a shared function:Public Shared Function CalculateAreaFromRadius(ByVal radius As Double) As Double
[Code]...
If I have two or more threads in the same vb .net app and each of them calls the shared function at the same time with different RADIUS, will they each get their own AREA? I want to know for each call to the function if it is using same local variables or each call creates new instances of local variables?Will the answers to above questions be same If I have multiple (2+) single threaded apps and they all call the function at the same time with different RADIUS value?
I had a problem (which is now fixed) but I've no idea why.I have an Ajax AutoCompleteExtender with a WebService method to populate like <WebMethod()> _
Public Shared Function populateACE(prefixText As String) As List(Of String) However this didn't work - I put a breakpoint in, and it didn't even get hit. However... <WebMethod()> _ Public Function populateACE(prefixText As String) As List(Of String) does work (the only difference being not Shared).
Fair enough, but why? If you have an instance of a class then you can access Shared methods of it; if you don't have an instance of a class then you can access Shared methods of it. So what is going on behind the scenes?
how to close projects or forms than called by ((shell)) function in vb6?
View 1 RepliesFor a class, I have to create a delegate and use the function in my program called DoStuff(). There is an error tht says "Method 'Public Sub DoStuff(stringVal As String)' does not have a signature compatible with delegate 'Delegate Sub MyDel()'.
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In vb.net I have two data values as shown below:
Dim startp as datetime
Dim endp as datetime
I have a function called ProcessData(soemdate) which processes dataporting.
In VB.net is there a way I can do something like
For each day between startp and endp ProcessData(soemdate)Next
I am working with tasks, so I've got the following code to update a label on my form:
Private Delegate Sub UpdateLabelDelegate(ByVal s As String)
Public Sub UpdateLabel(ByVal s As String)
If Me.InvokeRequired Then
Me.BeginInvoke(New UpdateLabelDelegate(AddressOf UpdateLabel), New Object() {s})
Return
I have this on the form load;
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Visible = False
Me.ShowInTaskbar = False[code].....
Notice: I used "End", to terminate the process.What I want to do is when the last function is called (Delete_AutoReq_PracNo) it terminates the execution of the application.
Reason...I'll schedule this application to ran from MS SQL Server at night. So realistically, doing all the processes I would like it to stop...Is what am doing sufficient to stop the application from running or there is a more robust approach..
I would like to allow my users to decide where they want their data to reside. I have created a data source which is referenced by crystal reports. I would like to replace the |DataDirectory| to point to a path the user selects. or if possible substitute it with vb function.
Below is the line in xml that point to my db. I would like to allow it to call a vb function that will return my db path I am not sure how to replace the connection string by using a vb function in xml.
<Connection ConnectionStringObject="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|MY_DB.mdb;Persist Security Info=True;Jet OLEDB:Database Password=pass" IsAppSettingsProperty="false" Modifier="Assembly" Name="MY_DB.mdb" Provider="System.Data.OleDb" />
I would like to replace |DataDirectory| with the result of a function called MyDBPath(), can anyone assist.
I'm looking to write a function that is called everytime an exit button is pressed, just simply prompting the user to click yes or no is there a guide anywhere? is there a name for this kind of thing i can look at it more?
View 7 RepliesI've been having trouble converting the following fairly straight forward c# code into vb.net 4.0, which I understand has anonymous delegates. I just havn't been able to figure it out yet.
_combo.DataBound += (sender, args) =>
{
var item = _combo.FindItemByValue(values[0].ToString());
if (item != null)
[code]...
I have tried the following
_combo.DataBound += Function(sender, args)
Dim item = _combo.FindItemByValue(values(0).ToString())
If item IsNot Nothing Then
[code]...
But the compiler complains that DataBound can not be called directly, but has to be called with RaiseEvents
I have used the Process.start function to open an Excel file as shown in the code
Process.Start("report.xlsx") and it works perfectly well.
My question is can this function be used to open a particular worksheet called Report1 in the report.xlsx file. If so what would the code be.I have spent many hours trying to research this topic but without success.
Possible Duplicate: VB.NET Function Return If I have a function that returns a boolean, what is the difference between:Return False and Function = False
View 2 Repliestake a look at the following Code:
Private Sub btnDebug_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDebug.Click
Dim d As Date
[Code]....
The Funtion ZZNull always returns Nothing, so IsNothing(d) in the calling method should evaluate to True.
But it does not !
When you run these lines, then you will see that IsNothing(d) evaluates to False
