I've got a really good idea for an application I want to develop and possibly try and sell online. There is one thing I have never done before, and that is disabling an application after 30 days. Let's say I want to let users try out the application for 30 days, and if they haven't bought it after that time, then the application disables itself.
Any possible ideas on how to implement something like this?
how do i get total no of days between two days which might include leap year
right now i'm getting the no of days by using DateDiff function in vb.net. but i reckon it is not precise. cos it is not validating leapyear.
I need this for 2 different changes.ON one form i got a week calendar, the other a month calendar.Was hoping to add 2 buttons previous & next.To scroll back in time x days, or x days forward.And similar for the months, but instead of days months.Can anybody give me a exaple or a method how to get this to work?Figured it could be done with a loop, but not sure anymore.
View 2 RepliesPublic Class ClassTrialVersion
Implements IDisposable
#Region "Constructor"
[code].....
The function for getting the difference in days between two days is giving me a wrong answer here.What could i be doing wrong??? DateDiff(DateInterval.Day, CDate("28/1/2011"), CDate("31/1/2011"))
View 1 RepliesCounting days independent of system calander ?
View 1 RepliesI want to add a feature to my trial version of the application. After first activation, I want to make it limited to 90 days. But I am concerned about user's changing the date of system hence deceiving my application. Is there any possibility to make it fool proof in a way that even if user takes the calender back, application expires after 90 days of first activation? First activation date has been saved in the database.
View 2 RepliesCreate an application that allows the user to select or enter into a combo box the number of days a person will work, and calculates the total amount of pay she will receive over that period of time. Salary is one penny the first day, two pennies the second day, four pennies the third say, and continuing to double each day.
The combo box must list the following items: 30, 180, 365, and 1000. Must be the default drop down box. Use a validating event procedure on the combo box.
The program should go through a loop once for each day, doubling the number of pennies with each iteration of the loop. You will need a running totl of the number of pennies that you add to with each iteration. To calculate the total amount of pay, multiply the total number of pennies by .01 and show the result in currency format.
Public Class Form1
Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
[CODE]...
Get the current number of usage days, unique usage days, etc in an evaluation license using CryptoLicensing Generator.
View 1 Repliesconvert days to months and days?
Normal 0
false
false
falseEN-US
[Code]...
I have a date in the future e.g. 13/10/2008 I need to subtract the current date (today is the 28/09/2010) minus 7 days, so thats 21/09/2010 minus 13/10/2008, which would equal erm, 720 something ? But the current date won't always be 28/09/2010, obviously. I need the code for this. EDIT: When i said future I mean past :)
View 3 RepliesIs it possible to disable F12 key when my application is running using framwork 2.0
View 1 RepliesI now changed the name of my vb.net application from "Ghost" to "Ghostz" and the new generated file name is "Ghostz.application" but the problem is that the old users when they will run the setup.exe file will lunch the "Ghost.application" file. How can I disable that for them and tell them with an error messag
View 4 RepliesEver since upgrading to Visual Studio 2010, I'm running into an issue where the first web request of any type (WebRequest, WebClient, etc.) hangs for about 20 seconds before completing. Subsequent calls work quickly. I've narrowed down the problem to a proxy issue.If I manually disable proxy settings, I don't experience this delay:
Dim wrq As WebRequest = WebRequest.Create(Url)
wrq.Proxy = Nothing
What's strange is that there are no proxy settings enabled on this machine in Internet Options. What I'm wondering is if there is a way to disable proxy settings for my entire project in one shot without explicitly disabling as above for every web object.
The main reason I want to be able to do this is that I'm trying to use an API [URL] which uses web requests, but does not provide any way to manually disable proxy settings.I have found some information suggesting that I need to add some proxy information to the app.config file, but I get errors building my program if I make an edits to that file.
I would like to disable some or all system sounds for a .NET 3.5 application.
I cannot find anything around System.Media.SystemSounds that turns off sound settings that the user has chosen via the control panel.
I want to be able to save things like:
<script src="https://spreadsheets.google.com/gpub?url=http%3A%2F%2Foj0ijfii34kccq3ioto7mdspc7r2s7o9-ss-opensocial.googleusercontent.com%2Fgadgets%2Fifr%3Fup_title%3DBrands%26up_initialstate%26up_
[code].....
I have Application Web based ASP.Net Framework 1.0, for security i want Button Close (X) in browser(ie,firefox,opera etc.) is disable and reason anything make browser exit, user only can exit browser with my menu logoff.
View 1 RepliesI am creating a user rights access to a menu. for example an administrtor account can access a sales report while a limited account cannot. What i mean is a customize menu for an administrator and limited user....
ex. administrator
Sales Report--->Daily sales-enable
limited account
Sales Report--->Daily Sales-disable
I am confused what will happen, when I disable a timer. Will it finish the process and then disable or will it immediately disable without completing process? for example
[Code]....
I want to run getMessage from somewhere else, so I need to disable timer during that time to be asured not to override anything and also before timer disable it should complete that function code.
Is there an easy way to disable all form validation when the user clicks on the "X" icon to close an application or when the user clicks on a button in the application that closes the application?[url]...
View 1 RepliesI am trying to clean up my code in a project I have been working on by creating two separate modules one that disables a service and one that enables a service through the registry all of this worked fine in one big form all together but I would like to also reuse the module in some other projects, I am getting this message however "Warning1Function 'ApplicationLayerGatewayDisable' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used". [Code]. what do i need to do to get rid of these warnings ? or do I just ignore them?
View 12 RepliesI am writing a small visual basic application to install clean up tools quickly on any machines that we need to work on here at my workplace. I am using 4-5 cleanup programs that I have packaged into MSI's and have batch scripts that I am calling in my visual basic application to run them as silent installs. However, because I am doing the silent installs, windows always pops up with the "open file - security warning" and I have to click run for each individual program. I am wondering how to get around this from my end within the application. I know it can be disabled in windows but I am not wanting to have to go through a process on every machine that I run this program on. I would like to find a fix on the back end in my script.
View 2 Repliesto disable right click and to disable the start button and task bar?
View 4 RepliesLets say every 7 days you manually kick off a VB.net program that moves all old files to an archive zipped folder; and you run this same code every 7 days BUT at some point in time you need to go into that zipped folder and delete every file that is 100 days old........What would you suggest I add to the code I have now, that would automatically un-zip the file (I assume I do need to unzip it first) then do the delete of the files that are 100 days old or older? I am thinking I need to set a timmer or somthing to trigger in 100 days from now then reset it once it is triggered; am I on the right track here???
View 8 RepliesThe date is actually a string being read in from a text file in the format
MM/dd/yyyy
how can i add 7 days onto the date?
I try to get how many days there are between two datetimepickers, but get convert error no mater what i do.
View 2 RepliesThis Code allows you too countdown seconds and minutes but im not sure how to add hours or maybe even days to it,[code...]
View 7 RepliesMy calculation is total/no.of days *3
View 3 RepliesI learned how to use DirectCast over the last few days and it's really helped me. However, I have a similar issue, instead of textboxes I am looking at variables that are referenced in the class.To bring you all up to speed, I have four variables, a Boolean that dictates each of the 4 players I have playing my game. [code] I would assume it'd work similar to DirectCast but I am unsure. What I came up with caused errors: [code]
View 14 RepliesI'm getting the following error:
[ArgumentOutOfRangeException: Value to add was out of range.
Parameter name: value]
System.DateTime.Add(Double value, Int32 scale) +7657639
System.DateTime.AddDays (Double value) +19
...
The line from which this error originates has the following code:
expires = Now.AddDays(30)
It occurs irregularly and irreproducibly. The server date/time is correct and set to GMT. I've heard that it could be some curiosity to do with timezones, but that is speculative. It seems that we're some time from the year 10,000 yet, so I can't understand why adding thirty days to the current time could cause this! Culture settings perhaps?
