How To Use Oninserting To Cancel Or Not An Insert
Jun 12, 2012
i am able to trigger the oninserting call, but I am not able to verify if a value is already on a DDBB before to insert the value into the table.These is what I am doing and why I need your support.
<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.Common" %>
<%@Import Namespace="System.Data.SqlClient" %>
[code].....
I am doing this one on .aspx file, but I would like to know if I can do the same thing on .aspx.vb.I do not how to import the firts lines on .vb:
<%@Import Namespace="System.Data" %>
<%@Import Namespace="System.Data.Common" %>
<%@Import Namespace="System.Data.SqlClient" %>
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Jun 6, 2011
I am stumped by being unable to cancel a list view insert operation following a method to validate a string. While the method validates the string and shows a modal popup when the string is not valid, then I want to stop the insert using e.cancel
Imports System.Data
'Imports System.Data.SqlClient
Public Class SecureOrderHCTPScan
[code].....
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Sep 27, 2011
How do you close a row on an ASPXGridView after running the RowUpdated event serverside. In the 9.3 version, you just needed to call to close the row after an insert, but
[Code]...
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May 18, 2006
I validate a DataGridView with the CellValidating-eventhandler.That works fine. However, I want to avoid validating when the user presses the Cancel button. In the sequence validation occurs before the event CancelButton.Clicked.
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Sep 21, 2011
i want to do this: when user click save button, the form must be check first..
if user did not insert the required data, user are not allow to save form..
the code:
Private Sub AssetMasterBindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AssetMasterBindingNavigatorSaveItem.Click
[Code].....
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Mar 13, 2011
Im coding an interest rate calculator and I need a close clause for the textbox and the combo box using e.cancel and im getting a "cancel is not a member of "System.EventArgs" error
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May 12, 2009
This should be simple, but the answer is eluding me. If I've got a Save action in my controller, and the save fails, how do I cancel the action without disturbing what the user entered? For example, Index is strongly-typed of "MyTable":
Function Index() As ActionResult
ViewData("message") = "Hello"
Return View(New MyTable)
[Code]....
In the Catch, if I put Return View(form), I lose the message passed via ViewData. If I redirect to Index, I'll lose what the user entered. I think I've seen the simple (correct) way to handle this before, but if you don't know what to search for, it's hard to find.
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Sep 29, 2009
I need a procedure that cancels all the print jobs of a specific printer.
I use vb.net 3.5 & win xp pro.
Plz don't send me "restart the spool service", I need code to cancel all print jobs.
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Aug 23, 2010
The problem is that the PrintPreviewdialog still shows when the pagesetupdialog1 is canceled.
Not sure how to cancel that along with the pagesetup on cancel.[code]...
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May 12, 2012
I was hoping somebody out there could help me please, I have an application which uses threading, process and runs cmd.exe - the problem I have is that I cant cancel the command.I have one textbox and two command buttonts, button 1 is run and button 2 is cancel - for this testing purpose only (my app wont be pinging but I'm doing this for testing only) I'm hoping to enter an I.P address in the textbox and then click on Run which starts a thread and the process, which so far is working.the coding I use to run the command is.[code]Now comes to difficult part, whilst the command is running I want to click on cancel which kills the thread and process which I have done but I have hit a brick wall because even though my thread and process has been killed my command carried on running, what I would like is the moment the cancel button is clicked to kill the thread, process and the command.
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Jun 12, 2009
I am not familiar with threads, but the project I am working on has a bunch of them. There's a thread for the main form, then threads for activities like a calculation, converting files, etc, so that the user can kick off a calculation job and then kick of a conversion job that will run at the same time. Typically, calculations can run for hours and hours; conversions and other threads may only run a few minutes.If the calculation runs into a problem, how do I cancel that thread? It looks like the threads are controlled (driven?) by the main form, but I'm at a bit of a loss.....
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May 4, 2009
I have been working/coding with e.Cancel, e.EventArgs, etc without knowing what the "e" stands for. Can I have a simple explanation of what e means and possibly similar concepts in VB.Only performance counts!
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May 19, 2009
How do I add a cancel button to a message box? I really need to know this because it is kinda stupid that i have a message box saying "Are you sure you want to clear everything?" and have no cancel button. Also what code do i need to make a program key where it is made so that I give a key and it works with that specific program another one will be made with a different key. I have no code for that because i have no clue where to begin (3 day trial code so it is locked would be nice to) The other problem I have is makeing the program open new windows so if i click trial then it will run for 3 days then done and with code making it run forever without the pop up again so how do I do all that?
Public Class Form1
Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
RichTextBox1.Undo()
End Sub
[code].....
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Mar 19, 2010
Heres my code so far:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[code].....
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Aug 3, 2011
I am needing to cancel a picturebox from loading. However, I need to cancel is from loading using the imagelocation command.
Example.
Picturebox.imagelocation = "http://i1.social.s-msft.com/profile/u/avatar.jpg?displayname=lone+defiler&size=extralarge&version=00000000-0000-0000-0000-000000000000"
[Code]....
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Mar 20, 2010
When I use form properties (Cancel button)it's work but most time this properties will not work properly. How do I this...any another method to close the form on Esc. button...
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Apr 1, 2011
I have a drink program with 4 staff members and want to know how to cancel the input box if they accidently click on another persons login. can you close the input box by clicking can and to close the loop. All Logins have the same code just different names
'Marys Login Button
Private Sub btnMary_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnMary.Click
Dim counter As Integer = 0 ' Reserve Counter as integer in memory and assign a value to it
[code]....
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Jun 4, 2011
I have a drink program with 4 staff members and want to know how to cancel the input box if they accidentally click on another persons login. can you close the input box by clicking can and to close the loop. All Logins have the same code just different names
[cod]e...
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Nov 26, 2010
i have the number 2.523 and its changing to 23. how can i cancel it?
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Nov 30, 2009
I found like 100 tutorials for this background worker, but none for my needs I want to cancel the thread using CancelAsync() , but all the tutorials do it only in a loop, like this:
Private Sub BW_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BW.DoWork
For i As Integer = 0 To 30000
If BW.CancellationPending Then
e.Cancel = True
[Code]...
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Jun 11, 2011
How can i catch the return of say an OpenDialog/Save Dialog/Color dialog?
For example i want to know if the OK or Cancel button was pressed and use a goto statement that jumps to a section of code that exits the sub to avoid an error (especially in the case of pressing cancel when using an open dialog).
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Jan 11, 2009
I am trying to make Backup program, that copy files from one location to another one, but I don't know how to allow user to cancel this operation.
The code that I use is:
Public ClassForm1 Private Delegate FunctionCopyProgressRoutine(ByVa totalFileSize
[code].....
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Sep 14, 2009
I am calling a dll function from my dowork event. When i click on cancel button, i want the background worker to stop executing thread. Im using VB 2008 Express edition.
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Jun 2, 2011
I have a search box that works great in WinForms, but is giving me trouble in WPF.
It works by starting a search each time a letter is pushed, similar to Google.
[Code]...
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Sep 19, 2010
If Not IsNumeric(textbox1.Text) Then
KeyAscii = 0
End If
I learned in MSDN and wrote those code,but it doesn't work. This code " KeyAscii = 0" it's not correct, I just want to cancel the input, for instance,if user input 1a, then "a" will be not inputted into textbox, but "1" will leave.
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Jan 25, 2010
Is there a way to get the even when a user presses an OK button or cancel button? In the Windows.Forms.DialogResult.OK only assignes a value for the OK or Cancel. However how do I get the actual value pressed by the user. In other words how do I know whether the user presses the OK or Cancel button?
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Jun 22, 2010
how can i put an if statement in a OkCancel Msgbox. for example when i choose OK, it will perform the code and if I Cancel it will not perform the code?
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Aug 7, 2009
I could add a contect menu strip to it but I feel that this wouldn't serve as a good interface for users not familar with the system...Also I would like to give the user the ability to click away from the DateTimePicker and instead of it closing and saving the value, I would like the value cleared On my close up event I have a event handler to store the chosen value to the database so I still need to maintain this funcitonality.
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Mar 7, 2011
Is it possible to send information to a BackgroundWorker thread while it is running? Here is my scenario: Parent thread calls background thread to send a data request to a database. If it's a big complicated query it can take a while for the db to respond, so putting the db request on the background worker thread is great. My app can do other stuff while the one thread waits for the db.
Now, db responds with beginning of data. I want my background thread to report back meta data about the result set to the parent thread. No problem there, I can use a custom user state object and the ReportProgress method. But now, how to I send a signal from the parent thread back to the worker thread? I want the background thread to wait while the parent thread does something, and then tells the worker thread to keep going or quit. I know how to cancel a background thread, but I want the parent to be able tell the child some information other than "cancel". Here's one way to think about it:
[Code]....
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Jun 22, 2012
I went to publish a new version of my game to my C: drive, got the standard "Build Started" and thats as far as it got.Now I can't do anything with the vis studio program, if I try to save - a warning message tells me this is a bad idea with a build running, trying to exit the program results in a message "A build must be stopped before the solution can be closed".
Choosing "Cancel Build" in the build menu caused the Build Started to disappear but nothing else. All other options in the build menu are inacessible.
Searching the program help and google for how to stop builds give a lot of web pages that go on about the build explorer, found in the team explorer, select the team project, etc etc - I don't have anything in the team explorer window, this project is just me and my pc.
What happens if I use the task manager to shut the program down ?
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