I'd like to set a panel to double buffered to prevent the massive flickering that I've got while I slide panels in and out of my form, but I'm not sure how to.I've Googled it, but all I've found is snippets of code which I don't know how to use. It involves something about creating your own class with double buffering enabled and then creating a panel from that class.
View 9 RepliesI'm having a lot of trouble getting Double Buffering to work for me. I've gone through about 30 sites but I can't seem to get it working for myself. I'm making a boardgame for a school project, and I have the characters (Who are just shapes with Happy Faces from the Visual Basic Powerpack OvalShape) and I have them moving with this
If intCurrentSpace(1) <> intTargetSpace(1) Then
intNextSpace = intCurrentSpace(1) + 1
Else
[code]....
But this solution only seems to be good fo XP and does not seem to work in 2010 unless I'm running it in the wrong sequence.
Private
Sub Setup()
Me.SetStyle(ControlStyles.OptimizedDoubleBuffer,
[code]....
I am having a similar issue with the double buffered set to true for a picturebox. I customized a picturebox control in vb.net where, a panel contains the picturebox.
Upon a mousedoubleclick of the picturebox, i scale the picturebox width wise a certain scalefactor, so that the picturebox is greater than the size of the panel. I am doing this for horizontal zooming and panning. With that said, the picturebox could become large in size.
At certain screensizes, after scaling the picturebox 6 times the size of panel, at fullscreen, i receive an error messsage implying "Not enough memory available to process the command."
However, when i turn off double buffered, i dont get the error, but i get much unwanted flickering.
Here is my code in the Paint Event:
Private Sub picPMGraph_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles picPMGraph.Paint
Dim i As Integer
[Code].....
Hi there..
Im hoping to update a label with the text "Buffering" and "Done" etc. according to the status of the Media Player i have embedded.
I can achieve this, but i do not know a way of constantly refreshing it so that the status is updated. Is there a way i can update it without the use of a timer?
I'm trying to make custom ListBox with some graphics. Base is ItemCollection - each item contains Panel, 2x label and 2x picturebox. What each panel have to do:
- Change backcolor on MouseEnter and set color back when MouseLeave occurs.
- On MouseDown(LMB) - Panel stays "selected" - different color.
Problem: I can't access multiple panels at a time(and I need to), just one via sender as in function. Of course, I can do it hacky way, but I want to do it effective and regular. Is ItemCollection the right solution or should I do it just like an array of panels? Also I want them in one "box", ItemCollection is good for it.
Second "problem": I need to make labels "merged" in panels, when i MouseEnter them(labels), background color on that panel sets to my default color. when i MouseClick them(labels), nothing happens (need to "select" parent panel). It can be again fixed with hacky way, just disable labels - but then the colors of labels are unchangeable.
In vb.net, im using objWriter.Write("playerA= "x"")as you can see im using double quotes inside double quotes, how do i skip it so the error doesnt show up?in php you make an "" to skip the string like ("playerA = "x" ")
View 6 RepliesI have a program that will use a lot of panels. The panels will all be on top of each other. Then if you clicked an option on one of the panels it would cause another panel to come up and so on. This is a game so it's not like the panels come up in a set order each time. Depending on what the use selects a different panel could come up in a different order.
z-order or hiding Z-order is supposedly a nicer way to do it instead of hiding so i was going to try that, but sometimes when a panel comes up it has info from another panel on it or the panel doesn't show at all and other things like that.Is there a way i could send all panels to back and bring only the panel i want to front other than doing something like..
VB.NET
Panel1.BringToFront()
Panel2.SendToBack()
Panel3.SendToBack()
[code]....
Since doing that every single time would take so much time depending on the number of panels there is.
Im trying to buffer data being written to a device on a com port. The equipment attached to it does not use any form of flow contol and if you write to much information to quickly it falls over. So I have had the following thoughts.
I would create a list of strings and when I wanted to write data to the com Port I would just add the string to the list. I would then have a Sub running its own thread to step through the list, write the string to the com port ,pause a fixed amount of time, remove string from list and repeat until the list is empty. Then keep looping the above.
Code I have so far is below
Private MsgList as new List (of string)
Private sub MsgPump ()
Do
[Code]....
THis does work but If I add strings to MsgList to quickly it throws an exception.
I've created a Form with 1600 Panels. Which are all called Panel (1-1600).
E.g. Panel1, Panel2, Panel500, Panel1000, Panel1600
I want a code so that if you click one of the Panels, the BackColor of the panel you clicked on, turns from Control to Red
I think there is an easier code than just adding this:
Private Sub Panel1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Panel1.Click
If Panel1.BackColor = "Control" Then
Panel1.BackColor = "Red"
Else
Panel1.BackColor = "Control"
End If
End Sub
To every single panel.
This will be my first post on this site, so I thought I would make it a doozy. I have an web application on our site at work that allows users to login to the system, and submit filings for dockets that our state agency governs. Without getting to involve with what that means, they basically upload mostly .pdf files, but there are others that are acceptable to upload as well. The current system that is being used, uses a simple FileUpload and saving it to a folder on the d: drive of the webserver. I ran into a problem that with anyone outside the building/network, the upload is extremely slow and seems to be limited files no larger than about 1.4MB. There have been a few cases where larger file have made it through, but those ar few and far between. I've tried a couple different 3rd party components, but seem to run into the same limits. So, I install the FTP server on the box with the IIS and am trying to go the FTP route using ftpwebrequest.
Below is what I have put together so far:
Imports System.Net
Imports System.IO
Partial Class _Default
[CODE]...
This seems to work as it is at the moment, but I know it has a long way to go for catch exeptions, speeding it up...
1.) The first problem I have run into is if you try to upload to large a file, you get Out of memory error. I'm needing to change the buffer so that it is buffering chunks instead of the entire file. I've googled over and over again and seem to find several good options in C#, but can't seem to convert them to VB. So, could some one give me some idea how to take what I have and change the buffering to use smaller chunks.
2.) I need to catch an empty UploadFile field.
3.) I will eventually be changing this so that it handle multiple file uploads like my current system uses. (Did I mention that I'm new to the ASP.NET and have been programming in .ASP)
4.) As you will notice from my list of acceptable file types, I might have a problem with some needing to be upload as Binary and some not. So I'm going to have to come up with a way to test and change the Requested.UseBinary = False as needed.
I'm sure that I'll find other items as I progress or the big bosses will find other things that they want to add, but for now.... I know that given enough time, I will get all of these items worked out.
By the way, we have a network adminstrator that leave a lot to be desired and most IIS and now FTP I'm having to learn, implement and configure. I'm wondering if there is anything else that could be causing these limits in file size. Since I've tried 4 completely different forms of uploads and they all seem to run into the same limits, I thought there might be something in a router, firewall, server configuration.... that I might need to look into as well.
My datagridview flickers and is very slow while loading. I reflectored the datgridview from Microsoft and discovered that there is a back buffer property which is not visible from the winForm. How do I set this property?
View 4 RepliesI'm working on an menu program right now which has 20 panels used to display bmps that can be clicked on to select things. These panels are simply named something like pnl01, pnl02, etc. to pnl20. I'd like to make them into an array, like pnl(0) through pnl(19), so i can change the bmp on different panels like this:
x = 7
pnl(x).backgroundimage = image.fromfile(file)
i thought this had something to do with enumerated controls but after some searching i couldn't figure out if i was looking for the right thing.
I have one problem. I have small form. on this form i have picure box, larger then form and autoscroll property of form set to true. On picture box i have some panels, which are unvisible by default.
Then i start program. I move down with scroll and on some event i change panel property visible = true. And here i problem. Panel position is not on the same location on picture.
And i tried with changing AutoScrollPosition, it works, but this is not solution.
Ok Guys what id like to do is Have a set of buttons across the top of my form and when the user clicks one id like the botom of the form to change to reflect that click. Kind of like the Office 2k7 ribbon but apply that to the whole for
View 3 RepliesI have a situation where I am handling both single & double mouse click events on a form. In both cases something has to be loaded, however when a double click occurs, I do not wish to execute the code attached to the single click event.Is there a way to intercept the mouse click's and check if double or single and then execute the right event appropriately?
View 2 RepliesI have a htpc project that I am working on. The main program loads dll plugins which are basically other win forms. On each of these forms, including the main program, I use a picturebox (a double buffered picturebox) for the background image and then draw everything on it by hand. Whenever I load the form from the dll and show it, I get a weird flicker. It looks like it is the previously used double buffer. Is there any way to clear the background double buffer before the flicker? Or am I going in the wrong direction?
Here's a couple of videos of the problem:
[url]
[url]
Notice the black screen with the white lines on it or the flash of the desktop after I click "Movies." How do I get rid of that?
For greater accuracy I should use a Decimal instead of a Double ( so I've been told ). Why then have Microsoft chosen to use DOUBLE for most of the functions that return a floating point value in the Math Class?
[Code]....
When i use VB6 i get the following outputs
961.605 * 100 = 96161
936.495 * 100 = 93650
929.295 * 100 = 92929
NOW..... When i do the above in vb.net 2005 i get the following
961.605 * 100 = 96160
936.495 * 100 = 93650
929.295 * 100 = 92930
How can i get the same output as the VB results. And i have tired it ! Type conversions, math functions, everything i can think of to get the same VB6 output !
how many double numbers are in 20 textboxes with numbers that i have.
View 17 RepliesI want to use this code. Is there anyway I can Double quote?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
If ComboBox1.Text = "Open Website" Then
[code].....
I am working with WMP and trying to change location where my music file starts to play.
timespan += CDbl(((60/BPM) * 4) / _NotesValues.ElementAt(i)) ' creating timespan from collection of notes...
[code].....
I am having trouble using an If statement to check to make sure the value entered in a textbox is a double. I was told to use double.parse to check this but I can't get it to work right. Anytime I run the program and type text into the textbox, it tells me the code is not right.
Here is my
Dim DblFahrenheit As Double
If TextBox_FahrenheitTemp.Text.Length = 0 Then
MessageBox.Show("No temperature was given. Please enter a temperature to convert.")
ElseIf DblFahrenheit = Not Double.Parse(TextBox_FahrenheitTemp.Text) Then
[Code]....
I have this:vb Private Sub ImageShop_DoubleClick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.DoubleClick openFile.ShowDialog()End Sub Which is supposed to show my dialog box when someone double clicks on the form, but that doesn't work.
I have a menu item that is single click, and that works fine. Why doesn't the double click work when someone double clicks on the form?
I have been learning how to sort a list using lambda functions
excessPop.Sort(Function(f1, f2) f1.ID.CompareTo(f2.ID))
I am however struggling to sort a list using 2 parameters within a lambda function. The properties within my list that i need to sort by are Category and then by Cost. how to do this?
to obtain double quantity between 2 hours I do this:
[Code]...
But how would it be inversely?For example if I have a number (double), how I know at all the hours and minutes are they?
[Code]...
I'm struggling to solve this problem and am throwing it out to y'all...
For example, if I had a value of 6.5, (representing 6.5 feet), I'd want to separate that value into two values:
6 - 12" sections
1 - 6" section.
This initial value could be any number from 3-16, in .5 increments. (3, 3.5, 4, 4.5, 5, 5.5, etc.)
I'm trying to write a (WPF) program with Option Strict on, but I have a problem.
I have a Canvas with a background image, and I want to use the coordinates of where the canvas was clicked to determine what should happen next. (Something like this)
Dim p As Point = e.GetPosition(DirectCast(sender, Canvas))
Dim imgColorMap As System.Drawing.Bitmap = My.Resources.ColorMap
Dim c As System.Drawing.Color = imgColorMap.GetPixel(p.X, p.Y)
This gives me the error: "Option Strict disallows implicit conversion of 'Double' to 'Integer'" for p.X and p.Y I have tried several things, like Math.Round but strangely enough that also returns a double.
How do I cast/round these Double values to Integer, so I can use them in my GetPixel method?
When i use VB6 i get the following outputs
[Code]...
I'm trying to finish up Visual Basic project for a class to create a playlist of files and to have them played.I have everything working if I single click the item from my list, and then click the play button in the WMP control portion of my form.I then want to add the functionality of double clicking the selection in the list and play with the following code:
[code]...
and nothing seems to happen.Digging into values of the debugger at the time I try to play the file:
[code]...
The sourceURL of the first item in the playlist is correct, but the duration is 0:00 (it should be 0:01). Since it seems there is no duration detected, nothing is played. Any idea what I missed? Again, if I single click the file, which sets the playlist as I want, then click PLAY on the GUI controls, it works fine.Also, is there any way for the program to detect when the song has changed when playing a playlist of multiple songs? I want to have label fields showing "Now Playing" information that would change info as the songs change, and maybe even change the item selected as things are played. I've not yet found a way to detect this change, only when the player starts and stops in general.