Loading Heavy Application?
May 28, 2009
I created a heavy application in vb.net 2005. And on start up of main form it doing lot of things like
1. Check New Software Update taking 15sec
2. Check Registration taking 15 Sec
3. Initialize Software also take almost 20 sec
First my application show Splash Screen and do 2 operations like
1. Check Update
2. Registration
So i want to do this First show Splash Screen and
-same time it start 3rd Process and remain Hide Main Form
-Same time it perform 1st and 2nd operation if pass then just show 3rd step without time waist.
I do it with delegates threading but it is not doing both operations same time.
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Nov 26, 2008
I have this application that fetches huge chunks of data from databases and i would like to have a loading screen, or simple image (gif) appearing on top while the app is working... but what normally happens is the whole application locks up. How can I make a certain part of my application still responsive while the rest loads?
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Aug 25, 2009
I have combo box being filled with more than 50 thousand records. it is getting sometime to load and bind the data. I am using datatable to bind the data. I tried using data-reader as well but in vain.
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Feb 23, 2010
I would like to use C# for an application I'm building, but the application makes heavy use of automation (i.e. Excel, Word).
Is it feasible to use C# for such an application? It used to be a nightmare to use C type languages for things like parameter lists with null arguments etc..?
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May 8, 2012
I love to experiment with linqpad, but now my task requires heavy computing power. Trying to do it on my computer is painful. My friend has a much more powerful computer than I -- can I execute some operations from my linqpad on his computer? I don't have RDP access, but I can run any .NET program on his computer.
If it is not possible, then is there any FREE service that provides computing power? Maybe a hosting trial or something. I know that Windows Azure offers a 30-day trial, but it has a very slow CPU module and in my country, MS partners cannot be expected to fix service sites when they go down.
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May 19, 2011
I'm building a VB.NET 2010 app that tracks battery usage. Run the app, start logging, then let the battery go flat. At the end, you get a nice graph that shows you how long the battery took to run down. Compare it to previous results and you can see how battery life is doing.
But this is supposed to be an unattended app, so it's not feasible for me to sit down and use word, browse the Internet, listen to music, play games etc. for four hours (especially at work!), so I'm looking for a way to artificially increase CPU usage to chew through the battery faster, and simulate how a battery would probably be used throughout a work day.
I've managed to inflate the memory usage using:
Dim a as long
Dim ptr(0 To 20000) As IntPtr
For a = 1 To 20000
[Code]....
I increase CPU usage in VB.NET? I've tried creating new threads with constant loops, but I get the funny feeling that VB.NET optimizes these kind of things to prevent memory and CPU hogging apps from taking over
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Jul 19, 2008
How To on a database driven login form. I'll include the Administration Backend to go along with it soon. Dial-Up users should not use this thread, it is image heavy
[Code]...
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Aug 19, 2009
I'm trying to load and host a WPF control in a .net 2.0 windows forms application. The WPF control should only be loaded if .net 3.5 is installed.
I found a link to Hosting WPF Content in an MFC Application and that is about what I'm trying to do but my C++ knowledge isnt sufficient to be able to 'translate' it to .net.
here is another link: Hosting WPF Content in a Java Application that doest the same again but I dont know where to start writing that code in .net.
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Jul 5, 2009
I have an application developed in VB.NET 9.0. I am trying to load a form when the application loads. It is basically a form without border and has a .gif on it. Actually when the form loads I cannot see the gif.
frm.FormBorderStyle = Windows.Forms.FormBorderStyle.None
frm.StartPosition = FormStartPosition.CenterScreen
frm.ShowInTaskbar = False
frm.TopMost = True
frm.Show()
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Mar 6, 2010
I'm trying to get my program to launch another .exe within the project folders. At the moment I am using:Dim oasicer As Process = System.Diagnostics.Process.Start("oasicer.exe", "hammer_8_8.txt")but the program starts and stops straight away. the files were originally in a folder called OASIC in the debug folder, so I had "OASIC" before them, but that didn't work either.
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Apr 17, 2011
how to perform alter key press at the time of form loading in vb.net winforms application?
Means when the form's(devExpress's Xtraform) load event is executed that time alt key must be pressed pro-grammatically .
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Apr 19, 2009
I can successfully save my application data to an .xml structured file like:
<?xml version="1.0"?>
<appSaved>
<saved Firstname="Graham" Lastname="McCann" Email="graham23s@hotmail.com" Username="graham23s" />
</appSaved>
I was trying to do the reverse and load the data back into the textbox fields so far i have:
'Load the saved information back into the textboxes
' Create a new instance of XmlDocument
Dim myXmlDocument As Xml.XmlDocument = New Xml.XmlDocument()
[Code].....
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Sep 29, 2009
I want a progressbar to tell me when my application is done loading, so I have tons of lines of code and the program is complete and it runs threw WMI, etc., etc., how do I get the progressbar to equal the value of completion my whole programs process has done?
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Dec 22, 2009
call form1.axshockwaveflash1.loadmovie(1, application.stratuppath + ("swfsStart.swf"))
but when i publish the trainer, and open it through either the clickonce application, or the setup, it can't find the swfs folder to get the .swf files. Therefor the trainer will not work.
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Sep 6, 2009
I like to make an console application to measure the time it takes to fully load a web page, what's the best approach to do that? The purpose of this small app is to monitor some pages in a website, in a predetermined interval, in order to be able to know beforehand if something is going wrong with the webserver or the database server. It would be nice to be able to measure the time it takes to fully load the the page (images, css, javascript, etc). I have some code but I is not measuring the fully page.
Dim sw As New System.Diagnostics.Stopwatch
Dim req As System.Net.HttpWebRequest = CType(HttpWebRequest.Create("[URL]"), HttpWebRequest)
sw.Start()
Dim res As System.Net.HttpWebResponse = CType(req.GetResponse(), HttpWebResponse)
sw.Stop()
Dim timeToLoad As TimeSpan = sw.Elapsed
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Jan 22, 2011
there is a "open with" option in the context menu right.if i select the application(app i have build from VB2010) from the open with option. i want the picturebox in my application to load the image i had selected(the one with the "open with" )
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Jan 16, 2010
I made two applications the first one calls the other. But the other application takes time to load. Even on a fast Pc. So i was thinking of adding a loading form to it. For example when the other application is done loading the loading form goes away.
[Code]...
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Sep 11, 2009
Let's say you have a user class. When the user is logged in there are properties representing basic user info, an associated address and, say, 5 profile pictures, the last a generic lsit like this: Private _photos As List(Of Photo). However, instead of carrying the weight of the profile pictures in a session vairable, to reduce resource usage, I only want to populate them if the user needs to acces them. So, for the most part, the generic list of photo's is empty. Will it carry weight anyway? I'm trying to decide if I should just not populate ituntil needed, or if I should create an alternative "light" user class which doesn't have this property.
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Oct 6, 2010
I navigate the webbrowser in my application with
Private Sub wb_DocumentCompleted(ByVal sender As Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles wb.DocumentCompleted
But I need to navigate to another page after Logging in to the website How can I wait the first page to be loaded fully then navigate to another page?
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Jul 13, 2009
I have a window application develpoed in vs 2008, framework 3.5, in which i have put a button.. Now where i click that button the other text boxes are filled up with the data from database thru web service.. what i want is while all text boxes are being filled i want to show an animated loading gif image till data loading is completed in all the text boxes.. i have tried to use image picture box but while data is loading gif image is displyes but in static mode.. cant see animation... i think this is because data loading and animation both are done thru one UI thread..
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Jul 24, 2009
I have a question. I am creating a VB .NET application that opens Visio to do some stuff there. Visio runs a splash screen on startup and the only way to stop the splash screen from loading is to use code like:
"C:Program FilesMicrosoft OfficeVisio10Visio.exe" /nologo
"C:Program FilesMicrosoft OfficeVisio11Visio.exe" /nologo
"C:Program FilesMicrosoft OfficeVisio12Visio.exe" /nologo
For each Visio versions in the command line (but I am not using the command line).
The problem I am having is that I can't run this code from my vb .net application, because my application uses the following code to load Visio:
Dim vsoApplication As Application
vsoApplication = New Visio.Application()
vsoApplication.Visible = False
And I do not know how to call the "/nologo" feature on loading time from my code to skip the Visio splash screen.
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Jun 2, 2011
an application i developed using vb 2008 express, to fill a web form with data from an access database, one after another when a button is clicked hasn't given me what i expected. the loop was suposed to stop after filling web form with the first data on clicking a button and continue to fill the webform with the next(2nd) data from the database on clicking the button again. Below is the code i wrote
Private
Sub STARTButton_Click(ByVal
sender As System.Object,
ByVal e
[Code]....
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Feb 25, 2009
I'm trying to use a loading overlay on top of a Windows form that adds a 50% opaque layer on top of a windows form with a loading GIF, while it does what it needs to do in a background thread. The overlay is a windows form that I'm drawing in the onPaint event.
The loading overlay works fine on multiple different form loads, but fails to work properly when summoned to ensure patience during a 30 second upload process (That Prints a Word Document to PDF, then uploads that PDF to a SQL Server). This upload collects some data from the form, puts it into an Object, then operates entirely on a background thread. The loading overlay will appear, show the first frame loading GIF, then just freeze. The onPaint is getting fired and the image frame is being updated, but it isn't visible
Constructor sets the form to be UserPainted:
Sub New()
InitializeComponent()
SetStyle(ControlStyles.UserPaint Or ControlStyles.Opaque, True)
End Sub
[Code].....
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Nov 20, 2009
i've read this somewhere before and was able to make it work, unfortunatelyi lost my sample codes and couldn't recall some parts, anyway, here's what i'm trying to doi have a couple of DLL with same methods and properties, instead of referencing them directlyto my main program i have a common interface which i have reference to in both main program and DLLs (implements), the main program is suppose to load whichever DLL it requires (so i was thinking of making it more like plug able), here's what i have so farINTERFACE CLASS
Code:
Imports System.Reflection
Public Interface MyInterface
[code]......
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Aug 2, 2011
I've spent hours trying to get this simple test case working, and searching the internet for clues.
I have a VS 10 solution containing my VB.net project, and a VC++ DLL project.
In my DLL project i have:
json_main.cpp:
#include <Windows.h>
extern "C"
[Code]....
I tried using dumpbin.exe on my DLL, but I don't get any function names out of it to determine the mangling scheme it is using
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May 22, 2011
Trying to exit an application but can't seem to kill it without an error."An error occurred creating the form. See Exception.InnerException for details. The error is: The form referred to itself during construction from a default instance, which led to infinite recursion. Within the Form's constructor refer to the form using 'Me.'"The form hasn't loaded yet, it is still in the process of looking for a file to load, if the user doesn't want to specify a working directory, that is their choice, but I need to close the app since it can't continue without it.I'm stuck in a class and can't get back to the main form without it continuing to load everything up. I wan't to force a shut down. [code] I was trying to get back to the main form without loading any more from the class to kill it there. [code]
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Sep 28, 2009
I'm trying to make my program have plugins that don't require real installation. My plan is to have the plugin consist of two files:a dll file, and a xml file describing the dll so the program knows what to do with the dll. However, I have NO idea where to start.I've referenced dlls and used them in my program before, but that was BEFORE compileing the program. Could someone please point me in the right direction? I am using Visual Basic in Visual Studio 2008 Professional.
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Apr 22, 2012
I have been working on a solution that uses Combo Boxes to fill DGV I have 3 RDM tables, 3 Combo boxes and 1 DGV Probably best way to explain tables is this way
Table 1 OwnerID 1, 2, 3, 4, 5 ( There are 5 owners)
Table 2 CDID 1=(1,2) 2=(3,4) 3=(5,6) 4=(7,8) 5=(9,10) (each Owner has 2 records)
Table 3 CDTrackID 1,1=(1-10) 1,2=(11-14) 2,3=(15-20) 2,4=(21-27) 3,5=(28-36) 3,6=(37-40) 4,7=(41-44) 4,8=(45-47) 5,9=(48-55) 5,10=(56-60)
where 1,1=(1-10) means
Owner 1 record 1 has 10 records and
Where 1,2=(11-14) means
Owner 1 record 2 has 4 records
etc etc
On Form Load Combobox 1 loads all the data from table 1 with no output in DGV (Works well) (5 records Perfect)
When I select a record from Combobox 1 it loads relation data from table 2 into Combobox 2 and also displays same in DGV (Works well) eg if I select record 3 in combobox 1 it loads records 5 and 6 into combobox 2 and DGV (2 Records. Perfect)Now comes the Problem When I select a record from Combobox 2 it is supposed to load the relation data from table 3 into ComboBox 3 and display same in DGV eg Combobox 2 has records 5 and 6. If I select record 5 It should load 3,5(28 - 36) OR If I select record 6 It should load 3,6(37 - 40) instead If I select Record 5 then Record 1,1(1-10) loads into combobox 3 and DGV If I select Record 6 then Record 1,2(11-14) loads into combobox 3 and DGV Regardless of which record I select from Combobox 2 (1,2); (3,4); (5,6): (7,8); (9,10) it always loads the same records into combox 3 and DGV Sample code for combobox 1
SQL = "Select * From CD Where OwnerID-1 = '" & cbxOwner.SelectedIndex & "'"
Sample Code for Combobox 2
SQL = "Select TrackName From CDTracks Where CDID-1 = '" & cbxCD.SelectedIndex & "'"
[code]....
The only thing I can think of is that my query constantly sees 2 records and numbers them as 1 and 2 thereby displaying records 1,1(1-10) OR 1,2(11-14)?
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Apr 7, 2009
I have a CSV file which I append using the LoadActivityLog sub and then I pass this CSV to a datatable and populate a DataGridView in my form using the WriteAcitivityLog sub. Everythign works fine. However the datatable passes the information into the datagridview in such a way that it populates the column header rows with data as well. I want to put custom column header fields into the datagridview. However i cannot figure out how to do this.
[Code]...
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Jul 31, 2009
when i try to load i get this error:
An unhandled exception of type 'System.NullReferenceException' occurred in Jeopardy.exe
Additional information: Object reference not set to an instance of an object.
on this line:
VB.NET
question(0, 0) = node.Attributes("Question1").Value
note that i did declare:
VB.NET
Dim question(,), answer(,) As String
Here is my code to save:
VB.NET
Dim filepath As String
Dim results As DialogResult
results = SaveFileDialog1.ShowDialog
[Code]...
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