Using Reflection To See Some Of The Code Behind The Contruction Of Some Of The Standard Controls?
Jan 29, 2010
Using Reflection is it possible to see some of the code behind the contruction of some of the standard Vb.Net controls?I'm particularly curious, at the moment about the SplitContainer a.k.a. System.Windows.Forms.SplitContainer.I am just curious as I would like to see the code used to construct some of the default controls, or would this have been done in C# , C++ or even assembly language?
I would like to list all visible controls in a form, I use reflection to do this, I have done what I want, but I have to write code for specifics controls that doesnt exist in the Framework, so i would like to know if there is some code to do that generic for any control (even third party controls).
Private Sub LlenarArbolFormularios(ByVal Arbol As TreeList) Dim parentForRootNodes As TreeListNode = Nothing Dim tipos() As Type = System.Reflection.Assembly.GetExecutingAssembly().GetTypes()[code]......
I haven't actually mastered VB.NET programming yet but I am already tired of the standard shaped and grey colored controls. Is there no other way (Programs or by code) of designing better looking controls of other shapes like circles or any shape I want and to give cool color and effects just the ones used in Windows Media Player v.11?
I have a main form, a separate plugin interface dll and another separate dll. Now this is my problem:I'd like to access the properties of the controls of the main form for manipulation in the other dll.
Example: MainForm Plugins.dll Data.dll
Main form have label control I define properties in the interface Plugins.dll from Data.dll I load Plugins to read the label control from the mainform.The question is how can I do that?
Using VB.Net, C#.Net and SQL Server.Windows Application.I want to separate a code for 3 Tier Architecture(Presentation Layer, Data Access Layer, Business Logic Layer).
Code.
Form_Load Dim cmd As New SqlCommand Dim ada As New SqlDataAdapter Dim ds As New DataSet
[code]...
Above code is working, But i want to do a same process by using 3 Tier Architecture.How to separate my code according to 3 tier Architecture.
Where can I find the function that handles the login for DNN? I would like to add custom features to the login and I don't see the function in Login. ascx.vb (unless I missed it).There is a tag and a tag that forms the login. I figure one of these has the actual "Login" button, but I cannot seem to figure out where they're coming from.[code]
I build program to launch application(launch application can as local profile or can as network credentials) using Advapi32 "Create Process WithLogonW".but I got the problem, I can't capture message of standard output(Stdout) and Standard Error(stderr).could everyone help me how to capture message and the code?
I am looking for the standard source code for a keyboard. Is there any where that I can download this source code so that I can modify it for my own use?
I usually use standard button and do the settings like causevalidation etc if required.
i decided to use toolstrip and inserted some buttons but end up that it doesn't do the validation for control and also doesn't call leave event of textbox control.
so my question is, anyway to use regular button functionality for toolstripbutton or there is a way to add regular button on toolstrip.
How can I add controls to a form in code and set the properties of the controls using the With statement?Also I would like to know how to add a container control and then add a control to that container.
"add controls at runtime" how to add code to the controls. kinda useless with no code, ehh? all results only told me how to add the control, that's it. well, this result is different. i will teach you firstly how to add controls at runtime, then how to apply code to them at runtime
Firstly, add the controls:
[CODE]..............
Now run it. do you have a button on the form? if yes, excellent. if not, you made a mistake. try again now how to add code? you may have noticed that when you double click on any control, it says private sub button1_click(blah, blah, blah) Handles button1.click where it says handles button1.click is what determines when the code executes under what event for what control (in this case the click event for the button1). this won't work when adding code at runtime. did you notice in the above example i added a with event, and addHandler? this is what creates the handler (same as Handles button1.click)
Now we add the code for the runtime control
[CODE].........
Above, the addressOf button1_click tells the program to execute the sub button1_click when the button is clicked on (as determined by .click) but i know what you're thinking! your thinking "why would we even BOTHER doing this at runtime? isn't it easier to do it at design-time in the first place?" yes it is, providing your not writing a plugin. plugins are code based, not GUI (also reffered to as WYSIWYG). to update existing forms using plugins, you need to use this method.
I have the following code which is used by 7 comboboxes, the only difference is the combobox1 to 7 and the DataGridView5 to 11. In VB6 I would have used arrays, is there any way to write the code once or do I have 7 ComboBox1_SelectedIndexChanged subs.
I am trying to create and remove a series of controls programatically. The user will have a numeric updown to pick a number. The program will then create a bunch of duplicate controls based on whatever number they pick on the fly.
Public Class Form1 Private Sub NumericUpDown1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles numberDebts.ValueChanged[code].....
The creation part works just fine.As the number is toggled upward a new label is created.However whenever I remove labels it acts very strangely.The first time I bring it down it works just fine. Then the next 3 do nothing but the 4th removes another line.I can also toggle back and forth and it will eventually remove the label. So for example.
Starts with 1 selected - 1 label visible (1) Change to 2 - 2 labels visible (1-2) Change to 3 - 3 labels visible (1-3)[code]....
If I toggle back and forth between 2 and 3 eventually label 4 will go away.I want only 1- my numeric up down value to be displayed and have everything else after that removed.
I just had an absolute nightmare scenario. Somehow while working in VS 2008, the wrong sequence of keystokes occured and I deleted all the controls on my userfom. The form is extensive. I could not undo the deletion and restore my form. So I decided to copy all the code from behind the form to a text file. I then deleted the project and then went to one of my latest back-up copies and dropped it inot my project folder for VS 2008. I opened this back-up file in VS 2008 and simply pasted the entire code from the text file (5,000 lines) into the form. The backup file has the same name as the original.
When I go to run the code, the form loads properly, but none of my control events seem to be firing.There are not any errors showing up in the Error Window. I then started getting an error prompt saying "Project XYZ cannot be modified at this time." Anyways after several attempts, I decided that instead of copying the entire piece of code from my text file, I would only copy pieces that I recall as being updated. Now everything loads properly and the routine runs. But I know have yet another control event not firing. The control exists, the event is there but no firing.Given that I was prudent enough to make back-ups AND I have the actual code from the crashed file how in ____ do I copy this code back into my form and have it work?
I have been searching and having no luck...So anyway, what I need is a way to copy tab1's controls or items (like textboxes) and then have them pasted into a new tab.
This would be done through a "New Tab" button. When that button is pressed, a new tab will open up and it should have all the same items that tab1 has.
The editor basically uses a bunch of labels and pictureboxes (for now) and then an image is created from the panel which contains all of the controls.It sounds quite confusing, but basically i'm trying to create something like visual studio itself, which will allow "controls" to be added onto a panel, and then everything can be exported as an image when the user chooses to.I've worked out all the code to move controls and exporting the image, just having trouble trying to work out how to add an event for newly created controls as you can only handle a control, and not a variable.
I have a checkbox and a panel inside of a FormView control, and I need to access them from the code behind in order to use the checkbox to determine whether or not the panel is visible. This is the code that I originally used, but since I put the controls inside of the FormView, it no longer works.
Protected Sub checkGenEd_CheckedChanged(ByVal sender As Object, _ ByVal e As System.EventArgs) If checkGenEd.Checked = True Then
[Code]....
There aren't any errors anymore, but nothing happens when I click the checkbox. I think there needs to be some kind of event to trigger it but I don't know how you can put an event handler inside of an event handler.
What I am trying to do is create a form in code that runs while the BackGround worker is running.I created a form the normal way with a label and progress bar but I want to update the label with what is going on in the BackGround Worker.Doing it the standard way isn't updating the label on the form.So my next idea is to create a form in code which I have done, but now I can't remember how to add controls to that form at runtime.Here is the code I have so far.[code]So from here I have tried the CreateControl() and the Controls.Add() and neither one is working for me.
Possible Duplicate: Best Free Controls for .NET For many usages, for many developers, (including me) it's required to use free (Win or web) components in their projects. Sometimes they doesn't work correctly.
I'm wondering about a feature in Visual Studio. Personally it bugs me when I open a solution someone else has been working on and it's full of Controls with Ids like "label27" "textbox3" etc. One of the first things I do is either rename them or remove them if they are never referenced in code behind (as is usually the case with the labels).
