During my program I put lines out to a text box on the screen as a form of logs.After each line is added I do a ScrollToCaret() to move to the end of the lines.However, if I'm manually scrolling around the logs/lines (eg: using the scroll bar) I don't want to that.
Is there something I can check so as not it issue the ScrollToCaret() if the user if currently scrolling around in the text box?
recently i came across a requirement. I have to create a text box with a vertical scroll bar. I hav to check whether the scroll bar is dragged down completely or not. i hav to do it in VB.net
View 1 Replieshow to detect mouse scroll with its direction ?
View 2 RepliesWith that program, it has extra dialogs within it. They cannot be scrolled out and stay topmost while the whole app is focused. How can I do that?
View 1 Repliesi have a panel on a form and i have various controls inside the panel which i then shrink and enable the panels scrollbar so i can scroll through the controls. i am trying to get the exact size of the panel (unshrunk).for example the panel is 500 pixels in width and i then shrink the panel down to 300 pixels and enable the scrollbar. when i try to get the size of the panel using code like
panel1.size.width.tostring
it keeps telling me the panel is 300 pixels long ..which yes it is because i shrunk it down but i want to get the full size of the panel which should be 500.
I have a wrapper class created around TextBox, and I want to find out if there is any way to test if the vertical scroll bar is at the beginning (the very top) of the text box and at the very end of the text box.Alternatively, I will be happy if only I can find out a way to check if a scroll bar is enabled or not in a textbox (note: it's not a RichTextbox).
By enabled, I mean that scroll bar is actually enabled i.e. you can use the scroll bar to scroll the control, not just visible (I know we can check visibility by GetWindowLong)
A simple form with a combobox called Combo, drawing artifacts when using ComboBox with Custom Draw and the contents of the combobox is scrolled up or down, and with this source code, illustrates the issue:
Public Class Form1
Private Sub Combo_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles Combo.DrawItem
Dim Combo As ComboBox = TryCast(sender, ComboBox)
If Combo Is Nothing Then Exit Sub
If e.Index = -1 Or e.Index >= Combo.Items.Count Then
e.DrawBackground()
[Code] .....
I set up an Openfiledialog and put in an initial filename value (the last filename the user opened).However, when the dialog shows up, it is as if the filename has been scrolled off to the left.I only see about the last 10 characters of the name, even though the filename field is big enough to show the whole name.It is also selected, which is ok - it means if the user types a name the value will replace what I've put there, which is reasonable behavior.How do I control this 'scrolling'?I call it scrolling even though there is no scroll bar.If I click in the field and use the left arrow key I can back up to the beginning of the filename - the filename gradually shifts into view about 10 characters at a time, until I reach its beginning, at which time I see the entire filename in the filename field which is how I'd like to have things when the opendialog opens.
View 4 RepliesI am modifying some code I found here to test to see if a user has scrolled to the end of the control. In this case the control is a Crystal Viewer but I posted here because I think the issue is based on the vertical scrollbar not the Crystal Viewer itself.
The code flags an error at
Me.CRViewer.Controls.OfType
Indicating 'OfType' is not a member of 'System.Windows.Forms.Control.ControlCollection'.
I understand the concept that I can't reference something that it is not but I don't know how to fix it. The original code was for a DataGridView.
The ultimate goal (not finished) is to find out when the user has used the mouse or possibly the scroll bar itself and if it hits the bottom of the page of the viewer, then trigger a new page so it looks like they can just keep using the mouse to scroll.
Public Sub New()
Me.InitializeComponent()
Dim vscroll As VScrollBar = Me.CRViewer.Controls.OfType(Of VScrollBar)
[Code]...
I am writing a GUI application to run on a touchscreen device using VB.NET and WPF--it must be full screen at all times, like a kiosk app; the window must not be able to resize or move in any way. The window contains a ListBox that users can currently scroll through by dragging across the list. The problem I'm seeing is that when the user drags across the list, the whole window moves a bit, exposing the desktop underneath, then springs back into place once the user stops dragging. I have not been able to figure out how to keep the window stationary while still allowing users to drag across the ListBox to view all list items. Here is a somewhat simplified version of my code:
[Code]...
how to scroll a text
View 9 RepliesI came to a company that already has a fully grown project... but coders that worked here before me didn't follow conventions and didn't use parametrized SQL queries... as a result there is over 1000 places in a very huge project that can possibly be vulnerable to SQL injection...
I need to find a solution that will automatically detect if there is an SQL injection in the code. So, for example there is a form which allows user to enter comments regarding a product, which will be sent to database on submit... how can we make sure that a user didn't enter a harmfull query instead of a normal text?
Is there any advanced code/regular expression/magic that can detect if this text contains a piece of SQL query instead of normal harmless text? I will accept any links, pieces of code in any language or even commercial software that will do that for me.
I'm having issues getting a text box to scroll to the bottom Every time text is entered into it. I searched google, and came to a bunch of solutions, some of them on this forum, but I can't seem to get them to work. One of them was a sub..[code]the problem is I don't know where to declare the sub. I've tried in form1 load, my click button click event but nothing worked..when ever I put the sub code in my source it seems to cut off the rest of my code, and generates a bunch of errors..
View 4 Replies1.I want the text to scroll down in the textbox.
Well, if I use AppendText() it does something like this, but if you scroll up, then each time you receive a message you will be scrolled all the way down.
Is there a way to make it scroll all the way down if I am scrolled at the bottom? Meaning, it would check the textbox where its scrolled at, then it would if scrolled to the bottom, and the text and scroll down, otherwise, it would just add the text.
2.Is there a way to make the mouse scroller scroll the textbox? currently it onlt does so when the textbox is the active control on the form, but can I make it always scroll it when the mouse is placed over the control, like it seems to do in MSN when you have a chat open for someone and you are typing a message, you can scroll at the same time without moving focus to the top part where the text is displayed.
I have a tab control with two tab pages. One page has the auto scroll enabled since there is to much content in the page. The middle mouse wheel doesn't scroll the scroll bar; I have to actually click and hold the scroll bar and drag it down to scroll. Is there a property to allow this?
View 2 RepliesI am having an odd problem with the Horizontal Scroll Control in my program.I am using it to scroll a series of panels across a form.This is my code:
Private
Sub scrHoriz_Scroll(ByVal
sender As[code]....
The problem is that this works perfectly if I use the left and right arrows and it also works perfectly if I use the scroll bar's slider SLOWLY. If I scroll using the slider and move it quickly then the scroll gets out of sync.The small change and large change are both set to 1 and maximum is set to 8
I have a DataGridView with a panel above it, that contains a group of textboxes above each column. My DataGridView has a horizontal scroll bar. What I want to do is when the DataGridView scrolls horizontally, scroll the panel with textboxes above it, so they stay aligned.I tried handling the DataGridView's scroll event, but I'm not sure what to do with it.
View 1 RepliesI am loading several command buttons into it (one in each grid box). I have the panel set to autoscroll. When TableLayoutPanel is set to AddColumns, all works well. However, I dont want horizontal scroll, I want vertical. When I set TableLayoutPanel to AddRows, a vertical scrollbar will not appear.
View 4 RepliesMy rich text box overflows with output during execution, thus activating a vertical scroll bar. When the program ends the created text box information disappears.I have tried a message box prior to exiting the program to stop execution but then nothing responds until the message box is A instruction doesn�t accomplish my goal either. I see nothing in the text box properties window which looks like it would do the trick and no luck with Googling for info so far.
View 6 RepliesAt first I am totally new in VB 2008. In my project I Three textboxes and a listview. I can find the items of listview by 1st textbox change event. The codes are as given below:-
1) How to scroll the listview items by textbox keyDown and KeyUp event.
2) And I want to get the listview focused item in the 2nd and 3rd textbox by 1st textbox keypress event( Enter press on keyboard).
In my project I Three textboxes and a listview. I can find the items of listview by 1st textbox change event.[code]...
View 3 Repliesi would like to scroll the label text horizontally.how is it possible in VB.net
View 11 RepliesHow would I leave the vertical scroll position as it is and set the horizontal scroll position all the way left if it isn't already in that position? I've been using Me.AutoScrollPosition and have come up with code that is satisfactory but I haven't been able to always leave the vertical scroll position exactly as it is and just move the horizontal scroll position to the left limit.
View 4 RepliesI have a textbox that shows events on a program, which I add. I use the 'scroll bar' option on the textbox to show the vertical scroll bar, but how do I make it stay at the bottom most possible? I am using this code while I am trying to learn how to do what I want the scroll bar to:[code]But how do I get it so the scroll bar will stay at the bottom-most it can? I'd like the newest, most recent events to appear at the bottom of the textbox, and to have the user not have to scroll down every time something new is added.
View 2 RepliesI am using VB .NET. I want to know how to make the scroll-up and down arrows visible for my text boxes if the user wishes to enter more lines of text than the size of the text box can take. I would like the user to be able to scroll up and down after he/she has entered all the text.
How do I activate this property - should I be using some other control other than a text box for this?
I want to search the text in my multiline textbox with a vertical scrollbar:
mEvent.Focus()
mEvent.SelectionStart = InStr(mEvent.Text, FindString.Text) - 1
mEvent.SelectionLength = Len(FindString.Text)
This works fine, but if the found text is too far down, I have to manually scroll down to see it. How can I automatically scroll down so that the found text is visible in the text box?
I have a simple Sub:
[code]...
It's job is to scroll the textbox (txt_folderactivity) after I update the text box with a new entry. The textbox is multi-line, so this keeps us at the bottom so we can see the new stuff. This sub gets called whenever any of the other subs add a line for things like file rename, deletion, etc. based on file system events (using Public watchFolder as FileSystemWatcher).I had a crossthread issue with just updating the textbox, but I wrote in a Delegate /Invoke for that and it works fine (something I found online earlier this morning), but now I have another issue and I'm not sure how to work it.
I'm getting a crossthread issue with this specific Sub specifically at the SelectionLength, and I'd like to set it up with a Delegate and Invoke and such, but I don't know how specifically. I've searched and read, but I don't get it. Do I need a seperate invoke on each of the 3 lines, or is there an overarching Invoke for the whole bit I'm still new-ish to VB and I don't know how to proceed. I've read some MSDN pages and stuff, but they aren't explaining what the problems is really and what I need to do (or prehaps I'm just not getting it).
Textbox scroll bar is enabled but after full page of text the scroll bar comes up, new text cannot be displayed unless scroll bar is dragged down. Is there any way that I can set to move scroll bar automatically so new text always comes up?
View 3 RepliesSo iv tried converting this code into vb.net from vb6, but whenever I run this application I get the following error "Attempted to read or write protected memory. This is often an indication that other memory is corrupt." on the underlined line.
Public Class Form1
Private Const SB_VERT = 1
Private Const WM_VSCROLL = &H115
[Code].....
how do you make a richtextbox scroll down automatically when text fills the screen so that the new line can be seen,
View 2 Replies