Override A Function And Call A Function With The Same Name From The Grandparent Superclass?
Sep 6, 2010
I am attempting to inherit an ASP.NET RegularExpressionValidator and add some functionality to it. I inherited the control and added my custom properties. However, I would also like the client-side functionality to call a different JavaScript function.
In order to do that, I will need to supress what is happening in the AddAttributesToRender method because the name of the function is hard-coded there. Here is what comes up in Reflector for the AddAttributesToRender function in RegularExpressionValidator:
[Code]...
Note: I tried to add the expando property before the parent class does to see if the code would check for its existence and skip it, but that just causes an exception.
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May 25, 2012
I 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.
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Apr 1, 2010
I'm trying to undersatnd the syntax of calling a funciton and it seem confusing when I'm using a web service in ASP.net. Maybe this question should be in an ASP forum, but it is a VB question. This simple web service allows you to type in your name and it response with an alert box with you name.
My question is, How can you call a function with 2 arguments when the function is only defined for one. I understand that the second argument is actually a method that handling the respons, but how can you interchange function arguments for methods and how do you know that there are methods for
Here's my call:
<script type="text/javascript">
function HelloWorld()
{
var yourName = $get('txtYourName').value;
[CODE]...
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Jan 25, 2010
How 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.
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Jan 30, 2010
ive two custom controls, which are used to draw and edit etc...(like paint but customized....) i want to save their images with a single click....So im using the Getimageofcontrol function to do it....its code is below:::
Public Function GetImageOfControl(ByVal c As Control) As Image
Dim rc As New Rectangle(c.PointToScreen(c.Location), c.Size)
Dim i As Image = New Bitmap(rc.Width, rc.Height)[code].....
and the code to call this function for saving the images is simply.. ...
GetImageOfControl(pboxd).Save("c:78.jpg")
GetImageOfControl2(pboxf).Save("c:lp.jpg")
but the problem is that both the images have the same content....
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Sep 14, 2010
I have a function where I am performing a lot number of database operations inside a Sub. The operation when called directly like:ExecProcess()
takes about 11 seconds to run.However, if I create a Delegate, and call the sub using BeginInvoke(), the very same process takes over 40 seconds to execute.Here's the threaded code:
Protected del As ProcessDelegate
Protected Delegate Sub ProcessDelegate()
del = New ProcessDelegate(AddressOf SELocal.ExecJob)
Dim cb As New AsyncCallback(AddressOf Me.ExecJobComplete)
del.BeginInvoke(cb, del)
Anyone know what may cause a function to take longer inside a new thread, rather than calling directly?
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Aug 21, 2009
Some programs implement command parameters, Like my favourite computer game - Crysis - has them and windows media player has them.But how could i implement them in VB.NET..I want to have a component of my program built as a seperate exe - so it can be an Optional component.But of course the seperate exe, on load, needs data passing to it.So i need something like Process.start("Componentname.exe", "/StartDL <Suchandsuchastring>)/StartDL will need to call a function, and the string that it uses will be given to the function to initiate a download?
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Mar 23, 2011
I arrive from years with Oracle plsql. Now I'm trying vb.net I created a function that return a char value, so written:
[Code]...
The question: I will create a function get_type(...) in vb.net that calls the tsql function written above... how can I call the tsql function [abc].[GET_PERSON_TYPE] in vb.net function get_type(...) function?
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Feb 23, 2009
I've created a user control with a toolstrip having 3 buttons AddEditDelete, and implemeted a generic toolstrip.in some cases, i want to add this menu to a form but only use the delete of this toolstrip and implement a special AddEdit for that form. so how can i tell the form that when the user clicks on add not to do the default add of the toolstrip user control and do the one on the form, in other words i want to override the Add function of the Add button toolstrip.
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Nov 8, 2011
I've got this MustInherit class called ViewerElement, from which derive classes like ViewerLine, ViewerImage, etc.Then, in the main program I have a collection of different elements (Images, Lines, etc.). What I want to do is something like the following:
[Code]...
I'm getting desperate to implement this Clone method without getting errors. How should this be de done?
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Dec 27, 2011
I am Using same function from many places...for example below function
Public Sub getUser(ByVal Name as string)
dim myName=Name
.......
insert(myName)
End Sub
I am using this function from so many places...I have doubt should this function override this myName values with latest function call?Suppose i called getUser("ABC") so value of myName is now ABC now sudden all call getUser("XYZ") so at insert(myName) will it insert("ABC") or insert("XYZ")??I need it to be insert("ABC") and then insert("XYZ")
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Mar 22, 2012
I want to create an ExpressionTree where a Func(of Vector, Vector, Vector, Vector, Double, Double, Vektor) should be called. So I use
Expression.Call(Forces(0).Function.Method, {Vec1, Vec2, Vec3, Vec4, Double1, Double2})(Vec1-4, Double1-2 are declared as ParameterExpression and Forces(0).Function as Func(of Vector, Vector, Vector, Vector, Double, Double, Vector). But I get an AgrumentException, because Forces(0).Function.Method has seven Arguments. (System.Runtime.CompilerServices.Closure as seventh argument at Index 0).
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May 26, 2011
Environment : VS2005 SP1
Protected Sub BILL_AMTTextBox_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim adapter As SqlDataAdapter
[Code]....
I want to do something like as it is bold part in code. This is giving error.
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Oct 12, 2011
I want to make an numerical integration method with takes in an analytic function and integrate it over a specific interval. For the numerical integration procedure I want to use some procedures in nr.com. The problem is that these are programmed in C++ and they uses functors to pass a function to the integration method. How can I do this in VB 2010?
I want to initialize the function (i.e. set a=1,b=0 for function y(x)=a*x+b) and then pass the function to the integration method. Then when the integration method call the function it only calls the function with one parameter (i.e. x since a,b is already set)
What is the best way to do this in VB2010?I want to make a general integration method where I can pass any single valued function and integration limits.
I have just started using VB, and from what I have found so far it seems like the tools you have is
- to us a delegate for the function
- to use a lambda expression for the function
- send a pointer/adressOf
- to create a function class/structure and submit this to the function
As for now I am most inclined to create a function-class. But I am not really sure how.F.ex. I make different classes for each "uniqe function" I want to integrate, but how can I pass them to the integration function when I need to specify the argument type in the integration-function-call?This seems like a basic problem which applies to many Math operations, so I think it would be very useful to clarify this.
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Apr 19, 2010
I'm trying to make a tabbed menu for the asp.net website I'm working on. One of the pre-requisite is obviously to color the current tab differently, so the user can know on which tab is currently is.
To do this, I made this method in my code-behind:
Protected Function GetCssClass(ByVal ctrl As LinkButton) As String
If ctrl.ID = currentLink Then
Return "current"
[Code].....
The problem is now that the click event is not always fired. On first click, nothing happens, but on second click on a tab, the click event is correctly triggered.
Edit3: Could it be that the value stored in the hidden field is reset each time the masterpage is reloaded (I mean, each link points to a couple masterpage + content page) ?
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Oct 31, 2011
I am trying to call a php function from .net. I tried to a webrequest method but I am not sure how to specify the function to call in the url. A link below shows the method I am trying to call.[URL]..
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Nov 28, 2010
I have created a new Class Library in visual basic and called it 'TestDLL'. I have a TestDLL.vb file where I put in this code
Class TestDLL
Function ReturnHello() As String
Return "Hello"
End Function
End Class
Then I clicked on the build tab and built the solution. I then copied the DLL 'TestDLL.dll' to C:TestDLL.dll
I am trying to use that DLL in a console application. I have tried this code but I get an error: System.EntryPointNotFoundException was unhandled Message=Unable to find an entry point named 'ReturnHello' in DLL 'C:TestDLL.dll'.
Declare Function ReturnHello Lib "C:TestDLL.dll" () As String I have added TestDLL.dll to the references for the console application and got that to work, however my goal is to load and unload different .dll files without restarting the application. I have a lot more code besides this, but I'm just trying to find out what commands I could use for just calling functions from DLL files.
There was something I was reading about assemblies, but all I get that to do is list the classes in my dll file. I will already know all the names and locations of the .dll files, and also the class and functions that they contain, because I will be building all of them. how I can get a simple function return in my console application.
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Jul 10, 2011
How to declare following function in vb2010?[code]
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Sep 9, 2010
I have in vb a selector
Dim ver =101
Select Case ver
Case 101
upd101()
Case 102
[Code]...
How can I make this select better by calling function in more dynamically in this form: with the prefix "upd" followed by a ver integer.
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Nov 22, 2011
I have a public function to call default email client.Public Function OpenEmail(ByVal EmailAddress As String, Optional ByVal Subject As String = "", Optional ByVal Body As String = "") As Boolean
[Code]...
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Jan 31, 2012
i have a java script function which help to calculate the total cost by taking the price * by the quality
<script type="text/javascript">
$("[id*=txtQuality]").live("change", function () {
if (isNaN(parseInt($(this).val()))) {
[code]....
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May 9, 2009
I am using textbox(txtFileType) with event OnFocus=("this.blur();"), so I can't use textchanged event for this textbox, I have written a vb code to calculate my FileNumber using Storeprocedures based on the value of textbox(txtFileType). Can I call this vb code from javascript which can be used in clientside.. please help with an example..
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Sep 23, 2010
Is this possible? Every x minutes I need my app to verify something.
Ex:
verify:
'code to verify
[code].....
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Jan 26, 2010
I've got a program that has a text box with a list of files that are on any removable media. Suppose you launch the program and there's nothing in your CD-ROM drive. Right now, you'd get nothing, and you'd have to insert a disc and click a "refresh" button, which triggers a function that repopulates the list.
Is there any good way to call this function on the event that the user inserts/removes a CD-ROM from any CD-ROM drive? Also, inserting/removing external disks and flash drives? Without having to constantly poll the drives. Floppy disks aren't important to me.
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Apr 28, 2012
I wrote a vb program that would prompt the user to enter a number and then enter the exponent value they wanted the number raised to. When they clicked button 3 it did the calculation. everything worked perfectly.
Now I need to change the program. I must create a function in a module and then call that function from button3 click event. I have tried several different ways and even though it seems to "work", it keeps returning an incorrect value![code]...
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Aug 12, 2010
I develop a website and I have this problem:The registered users on the website should put a (date & time) field, and when the current date will be the same of this date a function (that I developed) should be called.
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Dec 19, 2010
How can I call a javascript function at the end of a vb.net S
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Sep 30, 2010
I need to call this from the code behind if there is a certain value read in from a query string variable ie
x as string = request.querysting("Var")
if x = 'Hide" then
function guestHide()
[Code].....
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Mar 30, 2011
I'm trying to call an array from another function into an argument command for a command prompt, but I have no clue on how to do so.This code is the code where I am calling the command prompt and adding arguments
Private Sub ConvertButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ConvertButton.Click
Using m_Process As New Process()
[code].....
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Feb 17, 2010
I have an unmanaged DLL and need to call one of its functions. Here's the [code]...
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