Is there anyway to tell if a scroll bar is visible in a listview?
When I'M drawing the listviewitem, I need to know if the vertical scrollbar is visible so I can make sure to make my item's width smaller than it normally should be.
I am using the Tabcontrol with autoscroll = True feature, when i make hidden controls visible on the tab there position is out of place, one work around for this is to set the scroll position to 0,0 by doing this...
[Code]....
A panel with enabled scrollbars has many buttons. If I push the tabulation key, focus navigates between buttons.When a partially visible button has focus, the panel scrolls itself in order to completely show the button.
View 1 RepliesI have a ListView which might contains a lot of items, so it is virtualized and recycling items. It does not use sort. I need to refresh some value display, but when there are too many items, it is too slow to update everything, so I would like to refresh only the visible items.How could I get a list of all currently displayed items ? I tried to look into the ListView or in the ScrollViewer, but I still have no idea... the solution must NOT go throught all items to test if they can be seen, because this would be too slow.I'm not sure code or xaml would be usefull, it is just a Virtualized/Recycling ListView with its ItemSource bound to an Array.
View 2 RepliesHow can i get the first visible item in a wpf listview (listview view is gridview).
View 5 RepliesI use a listview control which is created at runtime because I don't need it visible to the user. I basically use it to store some information about paths, sort it and then pick out the data I need. It works very well apart from it doesn't seem to sort. For efficiency, I turn off sorting on the listview while the data is being added then enable sorting on the listview at the end. However, the sorting doesn't work. Is this because the listview isn't visible or am I just being daft?
View 18 RepliesWith the Listview in Details view:When showing a long (scrolling) list:Is there an (easy) way to return the index's of which range of items are currently visible in the control?
View 2 RepliesI have this code:
Code:
Private Sub DragDropListView_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Me.MouseMove
If KeyItem Is Nothing Then
If tmrLVScroll.Enabled Then tmrLVScroll.Enabled = False
[code].....
but I can't get it to auto scroll vertically for largeicon, smallicon, and tile listviews.
At 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 RepliesHow can I check if a ListView has items that are not in its visible area?
View 5 RepliesI've made an extended listview for my application but do get some strange behaviour when i scroll down and select an item.
This is the
Imports System.Windows.Forms
Public Class iListView
Inherits System.Windows.Forms.ListView
[CODE]...
The strange thing is that after scrolling up and down some items get visible again.
I want to scroll the items on the listview on the event of a button clik.is there any funtion on .Net(Windows Application) for this?
View 3 RepliesPublic Function debugOutput(ByVal type As String, ByVal StringToOutput As String) As Integer
Debug.Items.Add(type, StringToOutput)
Return 1
End Function
For some reason only the 1st string appears(type) and StringToOutput doesn't appear at all. also how would i make a listview control automatically scroll to the bottom
I've got a panel - that's in a group box. All of this - with lots of other textboxes on labels - is in another panel (the big panel).I make the big panel visible and not visible based on selections made by the user.This small panel - that's in the group box. I cannot seem to make it appear.Even if I leave it VISIBLE at design time - the objects in it will not appear.Is there some kind of nesting problem that I'm not aware of!
View 9 RepliesI have five menu items that i have created as a user control and placed on the master page. Now i want one of the menu items to be visible only for particular user role and not visible for others. Here is what I did. Its not working though.
[Code]...
I'm having an odd problem when making a form visible and not visible and it not continuing to function. Here is what I have happening. I have a main form (frmMain) that is an MDIParent. On this form I have a menu to open a second form (frmCalculate) and populate a listview from Items in the database.
As I click or select items in the listview on frmCalculate the tag is read and data is pulled based on the id stored in that tag and fills in various fields on the form. This works great. However, I also have a context menu attached to the listview that allows me to perform a "what if" scenerio on the items I am calculating. When I select this menu, I hide the frmCalculate and open the frmWhatIf form where I can mess around with values on the item I had hilighted in the listview on frmCalculate. Nothing is pulled from or written back to the database here, all the information is filled in from fields on frmCalculate. It just allows me to look at rising costs and how they will affect my margins.... anyway.
If I then close frmWhatIf, it brings my frmCalculate back by setting its visible propery to true (never closed frmCalculate, just hid it). At this point if I click an item in the listview I get an exception for a null reference. IF however I never hide frmCalculate, I can open and close frmWhatIF without ever having an issue. Why do I lose the functionality to select items just by hiding and unhiding the form? As a test I added two menus to the toolbar on frmMain one called hide and one called show. I then opened frmCalculate with original menu item to populate the listview and selected a few items to test that it was working and then using the hide menu I made the form invisible and the show button to bring it back. This yielded the same exception so without even opening frmWhatIf the problem still occurs.
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 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 have 2 controls on a form. Panel1 and picturebox. I am using the following code to zoom in.
PicBox.Width = PicBox.Width + 100
PicBox.Height = PicBox.Height + 75
'PicBox.Left = PicBox.Left - 50
'PicBox1st.Top = PicBox.Top - 20
i am also using the following code to try and scroll whilst zoomed in
Inherits System.Windows.Forms.Form
Private m_PanStartPoint As New Point
Private Sub picbox_MouseDown(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles PicBox.MouseDown
'Capture the initial point
[code]....
I have set the panel to autoscroll and added scroll bars but they do not scroll far enough... They only scroll about 2cm.
Following default the datagridview will scroll following vertical. How can i do that. I tried :
DataGridView1.ScrollBars = ScrollBars.Horizontal but not work
I have placed several PictureBox Images of different colored dots(which represent lights) on an image of a Christmas Tree. I can make the lights randomly flash using a randomGenerator and a Select case statement. However, the code is very long. There are 67 lights on this tree and the code is 71 pages long. There has to be an easier way to do this. So far I have tried the following with two images of lights just to see if it would work and it does not work:
Dim picLight(2) As
Boolean
For intX
[code]....
Is it possible to write code to make a scroll bar scroll? I have a working scroll bar on my form.
I am using voice in my application and I just want to know if there is code that I can write to make it scroll so that I can add that code with a voice command so it will scroll.
Below is the exception code info. when I try to make form visible for the first time from another form then I get an exception code. something like 'a required variable not set'
Quote:
CODE:
i want to format listview head of listview textalign = center and item of listview textalign = right
View 1 RepliesI want to populate a listview and leave selected records that are true
I have a DB record which is ID int, desc varchar, selected boolean.
I have tried the code below
LVProducts is a Listview and DS is a dataset
CODE:
