VS 2008 Error "The Requested Performance Counter Is Not A Custom Counter"
May 20, 2010
I have this code sample from a book I'm reading which looks to be incorrect:
Imports System.Diagnostics
Sub Main
Dim pc As New PerformanceCounter("PerfApp", "Clicks", False) 'excepiton here
pc.Increment()
counterLabel.Content = pc.NextValue().ToString()
End Sub
There excepion message I get is: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. I looked for a property to see if I can set it but couldn't find one.
I don't see why this doesn't work. I have gone into the registry and removed the registry key below and still no joy. The error arises at the For Each Loop.
In the following block of code always returns zero for the CPU usage. However, if I run it through Visual Studio in debugging mode, do a "Quick watch" on the variable "pcCPUCounter", add ".NextValue()" at the top, and tell it to reevaluate, that returns the varying percentage (eg, 5%, 71%, 16%, etc etc) as the processor utilization fluctuates.
Why would the code always print out zero, but the quick watch doesn't?
Private Sub UpdateCPUUsage(ByVal strSelectedServer As String) 'Performance items come Performance Monitor: perfmon.msc. 'The right-click on columns at bottom and select "add counter" to see list.
I wrote a VB 2010 app on a single core processor utilizing performance counters which runs fine. However the release exe fails on my quad core, trapped by the OS on its first access to a PerfCtr. I've loaded VB Express Studio into the quad core and when running the app in Debug I get this error "Cannot load Counter Name data because an invalid index was read from the registry." Similarly, adding a counter to the app on the quad machine results in the empty drop-downs for category and it sub fields.
where I can get an update to these registry entries?
Under normal circumstances I am not TOO bad at trying to figure errors out. However, I can't seem to understand why I am getting the age ol' "Object reference not set to an instance of an object error" in this lil bit of code.
This is where I define my 'intTotalRecords' Connection.Open() Command.CommandText = "SELECT * FROM CompanyTable"
Dim PenColor As New Pen(Color.Black) and after I received the values I draw the line with: objGraphics.DrawLine(PenColor, Xstart, Ystart, Xend, Yend)
The user can do this 10 times... (so 10 lines)...But if the user presses a cancel button, the last line drawn shall be removed (and the user can click until he is back at 0)..Would I use PenColor white here (to draw over the line)? Or is there a way to remove line directly in visual basic? I couldn't find it.
Public Sub TextBox3_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TextBox3.KeyDown counter1 += 1 End Sub
I set TextBox3 max length to 8.What code should i write if i want it to be like this:I wan the counter1 to stop increasing if the TextBox3 reaches 8 characters. (Even there's still key down occurs)After I click a button, the counter1 is able to increase again.
i have a button and if a specific option is set (via a checkbox) then once every 5 times the button is clicked an extra event happens.I thought a counter/Integer would be the way to do it but i cant seem to get it quite right, heres my code i have in the buttonclick event:
how i could add like a counter sorta thing, like i know i would declare like lets say AttemptsDone as a integer then i say it = 0 then during my script do i just do like AttemptsDone = AttemptsDone+1 ?
and if thats correct then how do i have it display on my form? like what would i use? textbox? or what and how do i have it change everytime attemptsdone is changed
i wanted to know how to create a for...loop...and specify the counter for the loop to control the animation time. I want the for..loop to increase the speed of the moving object (button) and move it 5 times...
the code i started with is
Private Sub ForNextButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles xForNextButton.Click For Counter = 0 To 1000 'do somtething----the something i want to do is repeat the moving process 4 times and at a fast speed---how do i write that Next
Code: Public Class Form1 Dim dblPrice As Double = 0 Dim dblTotal As Double = 0
[code]...
I'm trying to get a counter going for radiobutton 3 which will allow the user to add an extra child or adult for a set price any one know how I can do this.
I am planning to keep timer in the form to start from 1 and increment every second. This timer shiuld stop when the other events are triggered in the form (like clicking a button etc).
how to add a counter variable to this array? My code always stops when it gets to an empty array. I can't figure out how to make a counter variable to make it stop.
Private Sub btnTwo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnTwo.Click For Each i In PlayerArray
I have recently started creating a basic game however i am having some trouble creating a time counter. Basically what i want is a counter which is a label displaying say "05:00" as in five minutes. Then when the level is started i want it to count down to zero and make my game over label visible.
How to make my counter work. I keep feeling like I'm putting it, or maybe just part of it, in the wrong place so I've been moving it all over the place but haven't found anything that works yet. I'll paste my code below and it will be the code that seems to not stop when it reaches the end of my counter. Other ways I've tried it make it stop after one or two, depending on what I did to the code at them time.
Here's what I have at the moment: Public Class mainForm Dim guessCounter As Integer Dim correctAccumulator As Integer Dim totalAccumulator As Integer Dim answer As Integer [Code] ......
I am a new vb.net 2005 user and new to this forum.i need to know how u can pass a counter from one form to the next.am developing a computer based test and questions are on different forms so i need to know how the mark for a test can be maintained and added to from one form to the next.
Dim s = (From rowItem In i.AsEnumerable() _ Select rowItem("COUNTER")).Sum()
I'm trying to Sum all the value in column 'Counter' in my Datatable. 'Overload resolution failed because no accessible 'SUM' accepts this number of arguments.
I am trying to create a list box that can have things added and removed from it with the use of add and delete buttons in subroutines, i have also got a limit of 20 as the maximum number of items in the list box, also i would like the list box to be able to update the number of items in it after the user adds or deletes items from it: here is my code:
Public Class Form1 Private Sub cmdAddZp_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAddZp.Click
[Code]....
the first part is for limiting the number the user can add to the list box, the second part is the delete function and the last part is trying to count the number of items in the list.
