Asp.net - Same Function Running Parallel Will Override Values?
Dec 27, 2011
I am Using same function from many places...for example below function
Public Sub getUser(ByVal Name as string)
dim myName=Name
.......
insert(myName)
End Sub
I am using this function from so many places...I have doubt should this function override this myName values with latest function call?Suppose i called getUser("ABC") so value of myName is now ABC now sudden all call getUser("XYZ") so at insert(myName) will it insert("ABC") or insert("XYZ")??I need it to be insert("ABC") and then insert("XYZ")
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Sep 6, 2010
I am attempting to inherit an ASP.NET RegularExpressionValidator and add some functionality to it. I inherited the control and added my custom properties. However, I would also like the client-side functionality to call a different JavaScript function.
In order to do that, I will need to supress what is happening in the AddAttributesToRender method because the name of the function is hard-coded there. Here is what comes up in Reflector for the AddAttributesToRender function in RegularExpressionValidator:
[Code]...
Note: I tried to add the expando property before the parent class does to see if the code would check for its existence and skip it, but that just causes an exception.
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Oct 26, 2011
I want to expand it a little bit and add a second timer that runs parallel to the first timer, but is not affected in any way shape or form by the first timer.
I want the timers to run like this:
Time Timer1 Timer2
0 X X
1 X
2 X
3 X
4 X
5 X X
6 X
7 X
8 X
9 X
10 X X
Ive tried nesting the second loop in the first loop but the second loop takes 3 seconds to complete, so I found that it froze the first loop till the second loop finishes. I was reading about system threading (System.Timers.Timer) and it seems like that is the route I want to go.
I wrote this quick as an example:
This assumes that I added a windows timer control as timer1
vb
Option Strict On
Imports System
Imports System.Timers
[Code]....
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Feb 23, 2009
I've created a user control with a toolstrip having 3 buttons AddEditDelete, and implemeted a generic toolstrip.in some cases, i want to add this menu to a form but only use the delete of this toolstrip and implement a special AddEdit for that form. so how can i tell the form that when the user clicks on add not to do the default add of the toolstrip user control and do the one on the form, in other words i want to override the Add function of the Add button toolstrip.
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Nov 8, 2011
I've got this MustInherit class called ViewerElement, from which derive classes like ViewerLine, ViewerImage, etc.Then, in the main program I have a collection of different elements (Images, Lines, etc.). What I want to do is something like the following:
[Code]...
I'm getting desperate to implement this Clone method without getting errors. How should this be de done?
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Nov 5, 2011
I am trying change from Delegates to Parallel.ForEach I see the below works fine. Imports System.Threading.Tasks
Sub Main()
Dim secs() As Integer = {2, 3, 1}
Parallel.ForEach(secs, AddressOf Method2)
End Sub
[Code]...
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Jan 16, 2012
I have a service that scans network folders using a parallel.for method. However recently I am finding if I stop the service then while windows says the service is stopped the process is still running in task manager. However it is at 0 cpu and the memory does not change. If I try and end the task (even a force in command prompt) it just says access denied and i have to reboot the server. What would be the best way to make sure everything terminates? I thought of adding a global Boolean that in the stop procedure it turns true and part of my parallel code will check for that and call s.stop.
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Dec 13, 2011
I need to execute a stored function in oracle or sql through vb.net. I created a command object. Depending on the database type(oracle or SQL) i am preparing the Command text as Select functionName(?,?,?,?,?,?,?,?) from dual; (For Oracle) Adding the parameter values of the function. Now performing the ExecuteScalar which is not working saying invalid parameter. This works with ODBC connection string. But ODBC doesn't with 64bit. My Requirement: Code should execute a user defined stored procedure by taking the values at runtime.
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Jun 14, 2012
I have the following code:
[code...]
May I know how can I put a progress bar to make it keep running when the function FnProcessApproval() is running and stop when the messagebox is display?
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Dec 22, 2011
I'm working on an updater for my applications. I'm using VB .NET 2005. So, when I push the button called "Download" it runs twice and does the following: Download the file (~20mb). When the file is downloaded then it does again the same overwriting the first file. I used the following to make the download possible:
[Code]...
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Feb 8, 2012
i face a problem in checking file condition.I wish to create a program that can check the condition file continuously while the program is running.[code]If I suddenly remove the file, it cant show a message File not Exist or if I suddenly receive a file and place at the folder,it cant show me a message File already Exist.How can I modify my code to continuously checking the file condition while the program is running.
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Mar 31, 2011
when trying to run a function in a separate thread, my reason for trying this is because since the application is only run on one thread, the GUI hangs when the function is called.[code]In this code, the Print screen Button is pressed and the function HookCallBack is called.The problem is that the function has variables that need to be passed and returned, and while searching, i found a website that had an answer for this, and it required the function to be put in a class, and then it could be run on a separate thread while still passing all the variables needed.url...But the code cannot be placed in a class without giving errors and it seems to me like i did something wrong. The code is meant to be used in a form and not a class.My question is, how would i go about running the HookCallBack Function in a Separate thread?
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Jan 2, 2012
I am using the BackgroundWorker to do the heavy tasks so the UI thread doesn't get blocked. While the BackgroundWorker can send values to the UI thread using the progress-scheme, how can the BackgroundWorker get some values FROM the UI thread?
Either by asking it or simply by the UI thread sending some values to the BackgroundWorker?
Just accessing a variable of the UI thread like UIForm.x within the BackgroundWorker does not work, it does not seem to have access to the UI variables?
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Jan 4, 2010
Neat way of running across all the values of Enum?
i was looking for a way without have to use methods residing in [Enum]
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Dec 2, 2007
I'm teaching myself vb.net. For my first project I am making a md5 dictionary attack tool.I know that there are alot of them but I figured it would be a good way for me to start out.Right now I'm looking for other methods of running the words through a function that I have created.
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Oct 11, 2009
Is it possible to run a function or to execute a button just after the form was loaded? I mean to execute it just as the form_load subroutine has ended, so the form is already being displayed.
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Sep 29, 2011
Currently the process is in VBS, however this means there is no real interface.I attempted to get this into HTA, but this doesn't work to well due to known issues - the interface doesn't update with information until the end of the code (functions) are executed.So I thought I would create a VB program to do the work.Ideally, I would have a form load, and once loaded the functions (which map drives accordingly) will display the results on the screen.My code should be pretty sound - it is working - but it seems to be invoking BEFORE the form is displayed.I have tried various subroutines, such as Form1_Load, Form1_Activate, Form1_Shown, but all of these execute the code before the form has loaded and is displayed on the screen.As a test, I have
Private Sub Form1_Shown(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
lbl_Head01.Text = "HELLO WORLD"
[code].....
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Jun 18, 2012
im currently working with an SQL Server 2008 database and im trying to change values in the database usign visual basic.The following code runs correctly and I have tested changing passwords and have been able to logoff and then back on again using the new password. The problem i am facing is that as soon as the application exits the database returns to its origional values so the next time i run the program the passwords are back to the old values.
[Code]...
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Jul 5, 2011
I have created an application using visual studio 2008. The application is to copy the data from one excel file and paste to another excel file. The problem happen when i try use the copy paste function at the same time in other excel file.(I have opened others excel file before the application start.) I'm noticed the value that i paste is not same from what i copy in the excel file.(the application is running behind and using copy paste function at the same time.) How to hold the value using vb.net when copy from excel for the application so that other copy paste function is not affect it?
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Jan 19, 2010
In my .NET porject, I have to run a lot of validation on 4/5 fields. This validation checks if certain fields have errors, for example: the name field is not allowed to have numbers or symbols. If all these checks are passed, I need to execute a SQL query to pull some data out of the database. I could have it with a lot of nested IFs, and run the function at the end once it passes them all, but this will translate into about 12 nested IFs, and it seems a really bulky way to do it. I have also thought about setting a boolean value after every check, and if the value is 1 then don't run the function, else do. But of course this gets overwritten by other checks that pass.
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Jan 28, 2010
I have a form set up where I want to run the function PopulateGrid on it's Form_Load event. I have initialized the DB connection as follows:
Private Sub Main_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
LoadConfigFile()
cn = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & config("DatabasePath") & ";")
cn.Open()
End Sub
Now, I want to run the PopulateGrid function directly after I connect to the database as shown above. I'm confused as to how I'd use a database query in a module when the database is initialized in my main form. Would simple setting the variable cn to public work?
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Feb 17, 2009
I know that if you declare a function as a data type you can return a value, but my question is, is there a way to get back other values from a function without declaring it as an arraylist? For example, if you made a GetValues function, is there a way to get a value by using something like GetValues.A or GetValuesB?
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Mar 26, 2012
i want to get two output values in one Function is't possible ?i am just using String data type and split the values.but have any other easy way to get two output values actually i want to checking a folder how many jpg files are Horizontal and vertical [code]finally i split the values with "|" character.have any other options to get two values as separate in one functions.i have no moew idea about Dictionary,
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Feb 3, 2010
[size="5"]How can I return two values from the same function?? I need to return an arraylist and an integer...the arraylist is already returning now i need to add the integer
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Apr 20, 2010
Is it possible to return more than one value from a function? Like two integers, or an integer and a boolean, or any other data type combination. I understand I could use a sub and set these values in a variable but I was wondering if I could avoid declaring more variables by using a function.
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Jul 7, 2011
If I have a private sub and I call a function from within that sub, will the variable values in the sub be available to the function?
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Jun 1, 2009
m using a public variable called globalquery & a global function retriveToDataGrid() it works perfectly fine under same class /form ..... but when i try to access it from a different form , it gives no error and nothing happens
Public Sub retriveDataToDataGrid()
Try
Dim connStr As String = "Database=shahopticals;" & _
"Data Source=localhost;" & _
[code]....
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Jun 18, 2009
Ok simply my code doesnt want to output the correct number. I'm working on the project euler probems to expand my knowledge in VB.net and the current question I am working on is asking to work with triangle numbers. while researching I found that a triangle number can be calculated by using the formula:
[Code]....
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Feb 14, 2011
I have 3 variables. Lets call it "a", "b" and "c". These 3 variables can "independently" have 3 different values. Lets say: "1", "6" and "10". when you think of them as combination; there are (3^3) 27 combinations. I am told that it can be done through the recursive functions. However i am not a good developer to handle with that. Would u please help me?
- 3 variables and 3 different values are simplified. In fact; the numbers of variables and different values can vary.
- i know only the language, visual basic in .net; please don't answer in other coding languages.
additional note: i am going to put the these combinations in the string format into a collection.. for example "1;1;1", "1;6;1", "1;6;10".. and so on..
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Mar 30, 2011
Is it possible to make a function that returns both a datatable AND a list(of custom class) at the same?In my GUI layer, the main form (the application is MDI) calls this function and it has to fill the datagrid on one of its child forms and it also has to fill lot of other child forms with various information that is calculated from my custom class properties.Both the datatable and the class properties are created from the same external database and that's why I don't want to have two separate functions.
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