Call A Function Connected Through The Implementing Application?
Aug 31, 2010
I've decided to make my own simple scripting language parser. I've created about 50% of it and it works great! I need to implement "functions". What ever program uses my parser needs to be able to connect functions to my parser for customization. I've implemented "Lua", a scripting language, in a vb.net application of mine. To connect functions to the Lua Parser it used reflections.I need to be able to (by only knowing the name of the function and its structure) call a function connected through the implementing application.
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:
I have a simple program made in VB .NET 2003 with a few functions. I want to call these function from another application with automation.How can i do this?
im trying to implement a search function to my booking program, wich retrieves data from a SQL database. I have the screan all set up and all the variables at the ready, the only problem is, im not sure how to execute it in a sqlcommand line.
I've got all the fields that are required, such as date, time but i also have two optional options, Room Type and Room Capacity.
How would i write a sqlcommand to search for available rooms that meet the criteria for the room to be booked?
I'm fairly new to VB and am having trouble implementing the Round function. I know that the syntax for what I'm trying to do is:document.write(Round("KwH",2))But my problem is that I can't get it working with the following line:.Kwh = items.Attribute("KwH").Value _So I want the output of whatever 'KwH' spits out to have only 2 decimals, despite the actual figure having 8
this wont be easy to explain clearly but here goes..i have something that works fine in VB but not in C#.i have 2 classes, each class implements a different interface. each interface exposes an Initialize() function that should get called automatically when the plugin loads. since each class has an Initialize() function, i can watch both functions get called in the log. this works fine in VB.
when i do this same thing in C#, only the Initialize() in the first class gets called. anyone have a clue as to why this might be happening?
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as you can see the code is identical in both languages. why does it work in VB and not in C#?
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
I wrote a serializer (to Byte Array) for dictionaries that have a string key, but an object of some sort as its value.I've never implemented a generic type in a function or used a delegate before, so I'm a bit concerned about this being significantly slower than writing a serialization function for a specific type of Dictionary (Dictionary(Of String, MyClass) for example)Should this code be significantly slower due to the use of the generic type or the delegate?
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It works, and I could loop it and compare it to a more static Dictionary serializer, but I'm more concerned about when I start using this for a lot of different String/Object dictionary combinations, and it'll take me a long time to write a bunch of static dictionary serializers (that's what I'm hoping to avoid in the first place)edit: simplified intro text
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).
I have a DLL , written in VB.Net. This DLL has a below Function: Public Shared Function CreateApplication(ByVal aobj As Object) As Object When i Try to call this function by exe application with below routin i get "Parameters count mismach" Error. Public Function loadDllAndRunMethod(ByVal dllFilePath As String, ByVal className As String, ByVal methodName As String) As Object
Is it possible to automatically insert a Code Snippet when an interface is implemented? If so, how do you do it? I am looking for something similar to when you implement IDispoable in VB.[code]This will be used by web forms when transfering parameters from one page to the next using Server.Transfer
GOCR is a common Optical Character Recognition software that can be implemented into almost any programming language. You must convert the image you wish to convert into a PNM file and then proceed to call the executable OCR file. I cannot find any conversion methods for Visual Basic, nor am I quite sure how to send the file to the program and retrieve the text. Has anyone ever worked with GOCR or happen to know anything above?
As many of you know, GOCR is a common Optical Character Recognition software that can be implemented into almost any programming language.You must convert the image you wish to convert into a PNM file and then proceed to call the executable OCR fileI cannot find any conversion methods for Visual Basic, nor am I quite sure how to send the file to the program and retrieve the text. Has anyone ever worked with GOCR or happen to know anything above?
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.
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.. ...
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?
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?
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:
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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.
I need to be able to click a link from a vb6 program and call a number via a connected mobile phone.(Assumption: the mobile phone is already connected to the PC via bluetooth on com3)
Let's say an application needs to persist mostly immutable data. Let's say the application's data files can grow fairly large. How would you implement a simple transaction processing so that changes are either successfully committed or rolled back?
The only requirement is to use built-in .Net libraries. (no databases, no third party libraries)
Here's my current solution. The data file will have three main sections: (1) header, (2) data, (3) index. For now, the header section simply contains an offset to the start of the index section. The data section will store mostly immutable data. The index section will contain serialized objects with enough information to access the data section.
When the application starts, it only needs to deserialize objects from index section. Anything from the data section can be fetched as needed. As the application gets ready to write changes, it makes a temporary copy of the original header and index sections. These would be small relative to the data section. New data would then be appended to the original data section. Once all data has been written, in memory objects would be serialized to the end of the file to become the new index section.
If all this goes without a hitch, the temporary file can be deleted. If something goes wrong, the temporary file can be used to restore the data file to its original state.
Will this work or is there a more elegant approach?
I am currently developing a chat application and am trying to include:
Various states, like MSN does, available, busy and away.If the user doesn't touch the keyboard for one minute, the state of the user isto be changed into Away.Or something similar to these.I also need the program to be able to play a sound while running.
I arrive from years with Oracle plsql. Now I'm trying vb.net I created a function that return a char value, so written:
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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?
I am attempting to call a remote modem using a local modem connected via USB. Programming language is VB.NET and I am using the SerialPort control to talk to the modem.
Communication is as follows:
I send: ATZ0[CR]
Modem responds: ATZ0[CR][CR][LF]OK[CR][LF]
I then try to dial a number:
I send: ATDTnnnnnnnnnn[CR] where nnnnnnnnnn is a valid number
The modem responds with:ATDTnnnnnnnnnn[CR][CR][LF]ERROR[CR][LF]
All other commands seem to work without any issues
For info the modem is a MultiTech MT5634ZBA-USB-V92
If I use hyperterminal and type the same commands in it works as expected and dials the number, so it must be something I am doing in my code, possible some setup in the SerialPort control
I'm trying to teach myself how to create an Occasionally Connected Application. I want to create a simple app (like a survey) that will store all the data on a server but have the front end run on the users computer. The users computer may or may not be connected to a server when the data is entered (they may be collecting data in the field).
Program does 3 things:
1. Shows data from database (ie, displays survey data stored on server)
2. Saves data to database (ie, new entries or changes to old entries)
3. Has a background thread that checks for network connection
a. If no connection exists:
i. Gets data, to show, from local database
ii. Saves data to local database
b. If connections exists:
i. Sync local database with network database
ii. To read data: Gets data to show from local database which is now synced with network)
iii. To save changes/new entry: Save changes to local database then sync changes with network, then send update call to anyone else running this app on a different computer so they will get the same changes?
My VB.NET application is suposed to monitor what application currently is running in the topmost window. I have tried the following approach using a timer:
Declare Function GetActiveWindow Lib "user32" () As System.IntPtr Declare Function GetForegroundWindow Lib "user32" () As System.IntPtr Public Declare Auto Function GetWindowText Lib "user32" _
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By this I can see that for example Outlook or Internet Explorer is the topmost window as the name is in Window's title bar. However, if the user crates a new mail in Outlook the title of the window is "Untitled message" givning no hint of what application is running in the the window.
How do I get what application is connected to the topmost window?
On my program I am trying to make a ToolStripStatusLabel's text change to "connected" if connected to a network and if not connected to a network change the text to " Not Connected" then I don't know how to display a image if connected to a network or not connected. So if the computer is connected to a network I have a image that I would like to be displayed next to the ToolStripStatusLabel. And if not connected to a network, can the program display a different image? I tried this:
