VS 2008 - Control A Loop Event With A Scrollbar?
Jun 4, 2010
I am trying to use a scrollbar to move forward and back through records in a datatable and to populat an entry in a field to indicate that individual records are selected.In short i want to represent a the sum of a specific field of those records selected. Of course being a scrollbar it has to work in reverse and unselect records when the user moves it backward.
The purpsoe of the scrollbars is that there will be five of them and they will represent years. The records on the other hand represent projects which have an output (say money saving). The idea being projects selected in year one then cant be selected in year two. I am planning to do this by assigning a value that indicates they are already allocated to the previous or other years scroll bar. I can set up a loop to go through the whole data set and do this for a year (and have), but i want to use scrollbars and make it interactive.
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Sep 12, 2009
I have a custom contro which inherits directly from Treeview. Is there any way to handle some event related to when the TreeView Scrollbar appears (it does this when the height of the stack of visible nodes exceeds the height of the control) or "disappears"?
I realize if could set up a function which checks the ItemHeight * Nodes.Count, and compares this to the control height. However, this seems clumsy. I have been exploring the object browser (and anylized TreeView with Reflector) and have not found what I am looking for. If there is a way to access the ScrollBar Property at ALL within TreeView, I have not found it.
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Apr 7, 2009
[code].....
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May 9, 2012
I am writing below code for validating compulsary field account no. in form.User's requirement is set focus back on field when error comes :
If txtAccountNo = "" Then
MessageBox.Show("Account no filed can't be left empty")
txtAccountNo.SetFocus
Exit Sub
End If
It's working properly. But suppose user don't want to fill form and exiting from application.Message box keep on appearing till user enters account no.
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May 25, 2010
I create some vscrollbars dynamically and add scroll event handlers to them. I really want to detect when the user has finished scrolling with a mouse up event but this doesn't seem to be part of the scrollbar events.
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Mar 23, 2012
I am currently working on a VB.Net program where there are two parallel multiline text boxes like this.
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I would like that when one text box is scrolled, the other is scrolled as well. I was wondering if there was a Scroll event that could trigger the change the position of the scroll bar of the two text boxes.
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May 9, 2010
I'm not even sure what I need to know. None the less lets say I got a timer with an if event to check if said event is triggered then it fires off some code. The problem is if said event is triggered it keeps firing off the code and I only need to do it one time. Whilst letting the timer keep checking if event happened. I hope I worded that right and here is a rough translation in code. [Code] Is there a way to keep checking if an event happened and only fire off the code one time?
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Nov 22, 2010
I have a game with a large panel in VBE2008 with a Vertical Scroll Bar Control.
The user uses his mouse to move it up and down, etc.
But how can the game program move this control?
For example, the control bar is slid down to the panel and I want my program to slide back to the top starting position when the user clicks on the Reset Button.
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Jul 10, 2009
I want to be able to have a richtextbox scroll event synced with the scroll of another richtextbox. Do any of you know how this is possible
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Jul 25, 2009
I have a webbrowser control and when I dock it to fill the screen, the h scroll bardissapears. If it is undocked, there is a h scroll bar. How do I get it to have an h scroll bar if it is docked to fill the screen?
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May 30, 2010
I moved this from the debugger thread as I got no responses.This may be a better area.I have a problem enabling a Scrollbar on a custom control I have created.The custom control has one component,the scrollbar and an area that I draw upon from an internal datasource.Think something like a textbox.In certain instances,I want the scrollbar to be enabled. The Custom Control's job is to do this when the situtation is appropriate.I have a very simple piece of code here:
If <logic conditions> Then
DataScroll_vscrollbar.Enabled = False
Else[code].....
This code is in my OnPaint routine (along with a bunch of other drawing related stuff).Essentially I've determined that there is more stuff to display than the area of the control and need to turn on the scrollbar to give the user of the control the ability to see later stuff.With the exception of this funny behavior, the control is doing exactly what I want.I step through this and have a watch set.I can step through the set to True, but the Enabled value doesn't change.Even the EnabledChanged event fires (Doesn't on the set to False because it's already False), but the Enabled value is still False.I don't know why.Now here is the really interesting part and may give somebody an idea about what's happening: I can change the Enabled value via the debugger (via the Watch) to True.The EventChanged will fire, and from that point on I can set the Enabled value to either True or False and back again with no problems.
I even did some really crazy testing to see if perhaps the debugger just wasn't showing something.
did something like:
Dim idiot as boolean = false
if <logic> then
idiot = true[code]....
I have set the values to Minimum and Maximum, but the problem remains.
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Oct 21, 2010
So with the stock Textbox, I set the Scrollbars property to Vertical. This is great if the text in my box never changes; I can scroll up and down while the box sits still. If I'm running a background operation that logs output to the box though, the scrollbar resets itself to the top every time I append text to the box.
I know I can set the Textbox.Selection property (or use the Select method) to reposition the carat in the textbox, make note of that position in a variable, then append text, reset the carat, and use the ScrollToCarat method to reposition the scrollbar where it belongs. That's a really (ridiculously) long way around. Anybody know if there's another/better way of holding the scrollbar position, short of actually building a custom control (or using a Textbox and a separate Scrollbar)? It never hurts to try. In a worst case scenario, you'll learn from it.
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Jan 30, 2012
Does anyone know how to create a control similar to the screen shot below (CCleaner). It appears to be panel with a scroll bar and button to control what panel is shown any ideas?
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Mar 19, 2010
I have a treeview control where I am dynamically selecting a node depending on user interaction. when a node is selected I want to be able to have the scrollbar go to the location of that selected node in the tree. The scrollbar is simply made by overflow:auto in the div tag where the treeview is located. Can someone give me some detailed code to accomplish this?
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May 16, 2011
I'm trying to create my own control to build a custom planning on it.After trying it with loose controls I got an error but after advice on my previous post, I redraw everything.I have now the header of the control finished, the header shows the days of the month for as many months that fit in the window.Now I want to put the list of data below it, but it will be more than the windows height, so I need to have a scroll bar that will scroll the data but not the header.I would not like to design my own scrollbar and rather use the scrollbar control for it, but when I put it in, I cannot use the NEW keyword.example:
Dim sb
As
ScrollBar
with this I get the error message: 'New' cannot be used on a class that is declared 'MustInherit'.How can I get a scrollbar on my form to scroll the list only (so not the header)?
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Jun 15, 2009
I added the WMP control to my project, but I can't figure out how to make the music I play through it loop!
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Jul 31, 2010
I've read thru Iceplug's tutorial on control arrays and got it working. I tried to add a new event by basically copying his click event code and calling it a doubleclick event. I used the proper addhandler and assigned the correct name to my sub. I have the click event changing the background color to blue and the doubleclick event changing the background color to green. The background color does not change to green. Why?
Heres the tutorial with my new code encased in asterisks ...
Code:
Imports System
Imports System.Windows.Forms
Public Class form1
[CODE]...
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Jan 6, 2011
The scrollbar that comes with the ListBox is too small for touch screens, so I use my own scrollbar instead. But when you do this on various forms you end up repeating a lot of code. So my solution was to create a custom scollbar that has a property I can set to the control I want it to be a scrollbar for. In vb6, I can use the withevents keyword to get access to the control's events so that all the scrollbar related code can be in the custom scrollbar object I created, except...I had to create a refresh method for the consuming code to use to let the scrollbar know when the number of items changes. The scrollbar doesn't need to be told how many items there are because it has access to the control, but for a listbox there is no event to tie into when an item is added/removed so not 100% of the scrollbar related code could be encapsulated.
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Mar 15, 2010
well im creating a very basic game and im trying to use the keypress event to control my object. right now its set up through on screen buttons like
[Code]...
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Nov 15, 2009
Is it possible to dynamically direct a particular control's event to use a predefined method. For example: I have a form which I dynamically add controls to, let's say, TextBox1, TextBox2 and extBox3 and a module which as 3 routines, Method1, Method2, Method3. When I dynamically add my controls, eg TextBox4, I want to choose which of the 3 methods I want mapped to which event.
I was thinking of something like this...
Dim objTextBox1 as new TextBox
dim NameOfRoutine$="Module.Method2"
Form.Controls.Add(objTextBox1)
Call AssignMethodToEvent(objTextBox1.GotFocus, NameOfRoutine$)
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Oct 7, 2009
I made a UserControl with a button on it. I then added that UC to a form by dragging from the toolbox. Now I want to be able to access the click event of the button on that UC control in the form code. How do I do that?
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Jan 16, 2012
What i need is when i click a button it will msgbox the position of the vscrollbar.
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Oct 5, 2010
I am making use of a Label in a POPUP window. The POPUP works fine, but i would love to have a Vertical Scrollbar on my Label. I tried to use a Texbox instead, but the problem is that my text ends up in the wrong places. I set the Textbox to Multiline.
I am attaching an image to show the difference between the two.
1. Why is the Textbox doing this?
2. How can a get a scrollbar on a Lable?
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Oct 23, 2011
Is it possible to change the scrollbars color?
Reason I ask is because look at this:
The scrollbars stand out like a sore thumb.
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Nov 12, 2009
I have a backgroundworker that populates a dataset. My datagridview is bound to the dataset, and the datagridview refreshes once the bgworker is completed. Even after a refresh, the vertical scrollbar is missing, and clicking anywhere on the dgv does nothing. If I stretch the rightmost column to the right, the scrollbar appears and everything operates correctly.
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Jul 2, 2009
I have a huge image which I loaded into a picturebox on a Child Form. The problem is that I can't seem to create scrollbars on the Child Form. So... I tried the Webbrowser control. The code I used:
WebBrowser1.Navigate("file:///" & Application.StartupPath.ToString() & "libmap.jpg")Doesn't work somehow. But then again... I'm not sure where to place that particular folder. I tried all the C:UsersRadjeshDocumentsVisual Studio 2008Projectsproject_name.... and subfolders, but I ca't seem to get it right.
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Aug 12, 2009
How can I add a scrollbar to my form I tried the auto scrollbar option but is not working Q2 How can I validate the user inpute inside a textbox to check that he type the desired word?for Example validate if the user typed the word ( Bob)?
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Apr 1, 2010
I need some help to understand my options to get this working. I try to update a textbox control by a property-changed event from a class variable. I've digged around for a day and have a vague understanding that this can be solved in three ways:
1. Using some "if InvokeRequired", "Invoke" code in the handler method
2. By programming a special delegate class for this variable
3. By using a databinding directly linking the control (textbox) to the class event
Now.. Are these options correct? And would it be possible to get some help to show these three solutions in actual code (relevant to mine)? I can't seem to manage to sort all the information to a working code. Also, what are the pros and cons of the different solutions?
As my code stands now, it's obviously none of the above, as it gives a cross-thread error, as indicated.
[Code]...
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Oct 24, 2009
I would like to know how i can make only visible the vertical scrollbar of my webbrowser
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Apr 5, 2011
I am working DataGridView in vb.net08.The intresting task is ,When i move the Horizontal Scrollbar in DataGridView from Left to Right ,the First two Columns should be stable and moving starts from 3rd Column.Means If i moved at end of the right side but the first two columns should be visible. When i move the scroll bar the first two columns should not be disterb.Is there any property like Scroll bar position should be starts ??I tried the " FirstDisplayedScrollingColumnIndex" property but it only starts the Scrollbar from giving column index after moving the scrollbar the first two columns are moving into left side.
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