Can we write all the control events in a seperate class file in different layer rather than in code-behind of web-page ?
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Example:
Two files - TestClass.vb, myForm.vb
TestClass.vb looks as follows:
Imports System.Threading
Public Class TestClass
Private myClassThread As New Thread(AddressOf StartMyClassThread)
[code]....
The result:Application runs, no errors or exceptions.Displayed is the listbox and the Start button.I press the start button and a msgbox says "Not Invoked" as expected and upon clicking OK to that msgbox "Start Button Pressed" is added to the Output listbox control.Immediately following that the msgbox pops up again and says "Not Invoked". I was expecting "Invoked" as a separate thread is trying to use the Output listbox control.Of course this results in the Output.Items.Add being attempted which results in no visible result as the thread is not allowed to directly update the UI control.
I'm trying to learn how to write a data layer class to read in information and populate combo boxes, etc.
View 1 Repliesif I wanted the button onclick event in a different class how would I declare it?
when I refer back to the form it says I need to declare with events..
Private Sub btnAddToLaneFilter_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Dispatch.btnAddToLaneFilter.Click
If Me.txtCriteria.Text = "" Then
[Code]....
I've been searching for the answer for a while but can't find it yet. Basically so far I have a simple VB.Net form with one button.I would like to make a class or module that can handle events from the main form. This is my code so far but it doesn't seem to work.
View 6 RepliesI am working in VB.NET defining my own classes. I have 5 classes, Policy, Coverage, CoverageCollection, Layer, and LayerCollection. Policy has a bunch of data items, one of which is of type CoverageCollection. Coverage has a bunch of data items, one of which is of type LayerCollection.
Policy
private id as Long
private name as String[code].....
Then I do like "dim p as Policy". So, iIn order to get to properties on a Layer, I reference it like p.cov(0).lyr(0).face. What I am trying to do is add a readonly property to Layer that is calculated using some Layer information but also using something from Coverage (or even Policy). I can take this in as a parameter to the property, but I think there should be a way to get at Coverage/Policy information since I am "under" it already. Is there a way to do this?
I am generally following this tutorial, the main differences being I'm using 2008 R2 Express and Windows Forms, he is using 2005 & ASP.NET Web Site:'m building a minimalist Windows Form project for learning purposes. So I'm using a 1-table database with 2 columns, ContactID & Name. I added a dataset file, 'ContactsDataSet.xsd' to my project and added a single minimalist table adapter with just a fill() & getdata() method.Then I added a DataGridView control and connected it to the ContactsDataSet to confirm it was working and that worked fine. I ran it and it filled up with data as expected. Everything up to this point was auto-generated code.
View 4 RepliesI am instantiating a form object in my code behind the dataset just to access some form level variables and to occasionally set a label in the navigator bar. Recently in the b2 Team version of VS2010 there are some strange errors thrown in the immediate window and then I'm tossed out of debug mode and back into the IDE. This code has been operating for some time in this project without this behavior. A team member has just reproduced the behavior in his development machine also.The error that starts the shutdown of the debug instance is this: Control accessed from a thread other than the thread it was created on.
View 4 RepliesHow can I move the following to a separate class for repeated use ? (the problem is that it uses response object)
' Download/View a given file
Protected
Sub downloadFile(ByVal sFile
As String)
[code]....
I have a listbox in separate class like this [code]
[Code]...
How can I use that list box that I have created in that class on this form or I want to show that listbox on my form?
I have never dealt with dynamic control events before. I have a variable number of a controls each created at runtime. However I don't know how to code events for each control as they should do different things. I've looked at WithEvents and AddHandler and know I have to use Sender however not sure how to use /where to put eg. MouseEnter 1 panel when there's several.
View 5 RepliesIn my old VB6 programs I use control events like Keydown to activate code. The code is the same for all text controls. However, I am hoping that there is a efficient way of handing this in VB.net. Using VB2010.
Private Sub txtField1_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtField1.KeyDown
ButtonState2()
End Sub
Private Sub txtField2_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles txtField2.KeyDown
[Code].....
One of the time consuming factors of writing the DAL is adding and assigning paramters of teh stored procedure if ther are more than 10 parameters and must link more than 3 tables this process will take a horrible amount of time..
View 10 RepliesI've made an interface called ApprovalEvent in a separate file with the namespace myproject... I've also made a class called PurchaseOrder... it's also in the same namespace, just in a separate file. Whenever I try to make PurchaseOrder implement ApprovalEvent it always says that ApprovalEvent is undefined...
How can I make the class recognize that the interface exists but is in a different file?[code]...
i would like to have a shared function in a separate class file to address the form location . but i dont know how can i get this to work. if i use this below code in my form its working . but i cannot move this to a class file.
Shared Sub Formlocation()
Me.StartPosition = FormStartPosition.Manual
Me.Location = Screen.GetWorkingArea(Me).Location
End Sub
I need to grab some data from a webpage but for me the main problem is I can't grab the data the way I want. I want to grab the data in a listview control but my code is fetching all data within any span tag (span class "inputFieldLabel" which is not required) in a single column of a listview control. I am giving the format (source) of the webpage below and my coding in vb.net (2008),
<br>
<span class="inputFieldLabel">Following Are ...</span>
<span class="inputFieldLabel">01/02/2011</span>
<span class="inputFieldLabel">And</span>
[Code].....
When inheriting class or control e.g. ListView, TreeView, etc..., what is the best way to distinguish between built-in methods/property/events and mine?
Currently, i start my methods/property/events with "aa" in order to make them at the top of auto complete list.
I have to send mutiple events with one .ics file using ASpnetMail Class in vb.net. and i went throgh the ASpnetMail documention but i didn't get any clue..
View 1 RepliesI just happened to be reading through a post and stumbled upon this and was curious. As I was remiss to go off topic in someone else's post, I've dragged it out here.What we are doing here is logically incorrect. We loop thru all the records and set the sheet locked state and button image. But since the button is just one element, so effectively the image set would be that of the last record.We need to separate the two procedures and the events they take effect too.Ideally we should set the sheet locked state while loading it. (maybe the form_load event etc.). And we should set the button image when we switch the sheets (e.g. sheet change/activate events). The selection of events however depends on your requirements and wisdom.
[code]...
I noticed how the image was accessed above. My question is this, what is the differences between the above method and Image = Image.FromFile(Path) and if any, what are the advantages/disadvantages of each? This is just for knowledge purpose and is not pertaining to any particular problem.
I have a full source code of a webpage. The following code on richtextbox1 from a webpage that is relevant to what we need.
[code]...
Need a SQL Server "SQLClient" (VB) Data Layer Class?
View 2 RepliesI created a control that has picture box control docked within it. This control allows me to "animate" the image by swapping them out by setting the interval to swap them at. I want to use this control kind of like an animated icon within a application, but because the picture box is docked, the control I created won't respond to the events, MouseHover specifically. [Code]
View 2 RepliesWe have an ASP classic ERP (very large application) that we want to rewrite using ASP.NET. I am looking for a way to organize the application so we are going to be able to separate every program / webpage (over 400) from each other. Every program needs to be independent because many developers will work on the project at the same time.Visual Studio seems to make a DLL for every assembly so I was wondering if it's a good idea to make a huge solution with one project per DLL.[code]This way, we would be able to deploy every program separately without altering the others. We would also have over a thousand DLL to manage...
View 3 RepliesI would like to build a base class for my SQL Data Access Layer. I have most of it based out, but have a question about how to handle errors within the base class. I have a method for ExecuteNonQuery, ExecuteReader, ect...
[Code]...
I'm trying to automate a product that provides no such automation capability.I've take a cursory look at loading the app in a separate AppDomain, and also, through reflection, executing the Program.Main() to get the app running. I also tried getting the windowhandle from a separately created Process object (which I've learned will not work).If I have a reference to their assembly added to my project so I can reference an instance of "TheirProduct.FormMain", what, if it's possible, is the best way to go about capturing events from that form? What I need to do is to be able to capture a couple events, and perform a few Button.PerformClick() against the form.
View 1 Repliesmay i know is there any online tutorial or website where i can learn how to write class file for .net?
View 2 RepliesI want some of you tell me how to write code control internet shop using vb.net
View 1 RepliesI'm having difficulty figuring out how to run different programs with my VB program. Using Excel and other MS office programs is easy enough since I just add in the relevant COMs, but I can't for the life of me find out how to run other programs. I promise I spent many hours searching before bothering you kind folks here! I'd think this is a common issue so maybe I haven't been searching for the right thing.how to write code that will control and read data from applications.I know you can do "Process.Start" to open any application, and it looks like there are ways to determine the controls available on an open application, but I can't figure out how to do it. Is this possible? Or do I have to import a .dll file for every program I want to control? Or are both possible?
View 12 RepliesHow do you access a web page's source code without downloading the file? i.e., downloading a .php file generally wouldn't work - I want to access the code that it would return if I was using a browser.
View 6 RepliesI also went though the whole "ASP.Net in 24 Hours" book by Scott Mictchell. I followed everything that went on in that book and built the final project successfully. I also used the tutorials here to better understand the whole Membership Provider/User tables setup that was going on in the book. Next, I thought I would learn more about accessing data for ASP.Net since that is what most application do.I went through the first Data Tutorial here. I seemed to understand what was going on just fine.The second Data Tutorial seemed to just show a lot of VB code to build the Business Logic Layer. There was not much explanation about how to do it yourself.I think I can keep going in the tutorials here. I downloaded the code from the second tutorial and went through it.I am guessing that the code in the second tutorial was given just to proceed with the overall project that is being built throughout the tutorial sequence.
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