Strategy For Events To Trigger Condtionals
Dec 24, 2010
I developed app which accepts user responses. I created secondary labels which I envisioned as larger "tool tips" which prompt the user. ("prompts")As the user inputs to either combo box or text box, the label should go invisible and a "prompt" for the next input should go visible.I am trying to use Selected Index Changed,Leave, or LostFocus events to accomplish the visible invisible change.Is that the most effficient way to accomplish my functionality? A twist I would like to incorporate: the purpose of the "prompts" is to guide an unsophisticated user through the app the first couple times.After familiarity is acheived the "prompts" can be annoying.My strategy is to allow user to turn off the "prompts" by a check box.Then my conditionals will test the checkbox. checked property and either show the "prompts" or not based on the test. [code]
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Apr 3, 2009
trying to get my app to trigger som events on a keypress (lets say left arrow) when my form is not in focus.I've google it bu all i can find looks very complicated, is there an easer way of doing this?Or is it a very complicated thing to do?
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Dec 18, 2010
I've been playing with VB.NET for a couple days now, and I was looking into key input controls, now I've managed to have it react to keyboard buttons being pushed inside the main form (wasn't hard), where it counts total amount of keys pushed, not what keys are pushed etc.
What I'm having a harder time is finding a way to have this same functionality even if the form isn't active (for example when minimized to the system tray). I did find a similar question on these boards, but it was regarding hotkeys and that user was just referenced to the hotkey API, which is not what I am aiming for.
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Feb 20, 2012
It was working fine until I changed it to connect to an ftp sever, added NetworkCredentials and said connect, downloads fine but does not trigger the events like its supposed to. What do I do to fix this?I'm sorry if I misspelled something or my grammar is wrong, I've never done well in those subjects.
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Aug 2, 2009
If I want to trigger an event every hour, I would have to set the timer interval to 3600000. That seems a bit crazy. Is there a better way to trigger events in these "longer than X second" type intervals?
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Feb 18, 2012
I have a main form that has a dynamically generated treeview and also a panel control. Depending on the selection made within the treeview the panel docks 1 of three diffrent usercontrols which are full sub forms(done for ease of modifing design of sub form rather than layering panels on top of panels).Upon button click withing usercontrol i wish to trigger event within main form.For example delete button wich then triggers to remove current selected node from treeview. code for 1 of three diffrent user controls
Dim ctrlQ As New QuoteUC(TrViewQuotation.SelectedNode)
PnlSubFormDock1.Controls.Add(ctrlQ)
Code for delete button for which i need to raise event.
If MsgBox("Are you sure you wish to delete this customer ?", vbYesNo, "Delete Record") = vbYes Then
Deletecustomer(n)
End If
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Oct 6, 2011
i have to develop a software for motorola mc9090 that reads barcodes and rfids simultaneously, so i need to catch two different triggers: the one on the keyboard for barcodes and the other in the backside for rfids.the problem is that i didn't find any sample that illustrates how to set the trigger to read only barcodes, i found something on emdk 2.5 samples that shows how to set the trigger to read rfids but nothing for barcodes. So when i press any trigger the barcode reader is always enabled with rfids reader.Does exist a way to manage them with separated triggers?
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Apr 27, 2010
Would it be a good idea to start converting forms into .NET one at a time which you would then invoke from the VB6 app via COM-interop.This way, by the end of the process you would just convert the 'shell' of the VB6 application into a new .NET app, and all your forms are ready to go in .NET.
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Jun 7, 2011
is it possible to implement strategy pattern with different parameters in VB.net? For example I have the following code:
Public Interface InterfaceDataManipulation
Sub updateMyData()
End Interface
How to implemente updateMyData in the class that implements above interface class with different parameter,for example in class x :
Public Class X
Implements InterfaceDataManipulation
Public Sub updateMyData(ByVal x as String)[code]......
But the IDE raises an error "class x must implement updateMyData on interface InterfaceDataManipulation"
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Apr 18, 2011
I have inherited a .NET 4 VS2010 solution consisting of a WinForms app and a web service. I don't have access to a server that's running a copy of the web service but I have to run, debug, upgrade and test the project that accesses the web service as well as the web service code.Later, I also want to quickly switch between a deployed web service and the code in my local projectWhat's the best strategy for changing the projects so I can make changes to both projects, test locally, deploy the web service then test against that? If I find issues, I want to switch back to "local" mode to debug.
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Dec 23, 2011
We have a asp.Net vb.net 2008 project on tfs2010. The project has one main branch and for any release we create a new feature branch which is finally deployed. Post production deployment we merge back the branch back into main branch.We are now also adding a db project to manage our SQL too. Question is how to version control the differential scripts. The db project contains all create scripts which is fine if we had to deploy thep project from scratch but the project is already live. So now any new release or hotfix would normally contain alter or change script practically.
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Mar 4, 2010
I'm about to start a new project and want some advice on how to implement.I need a web application which contains a booking module for reserving timeslots, and a time management module which will enable employees to clock in / clock out.
If I am writing an update to the time managment module, I don't want to disrupt the booking engine availability by releasing a new solution containing both modules.to make things more difficult, there is some shared functionality like common users, roles and security.Here's a suggestion I've gotten, which sounds a bit cruddy, but may be functional.Write a 'container' web application which consists of basically a frame, and authentication / security features. This then has links which, will load the 2 independantly built and released web applications into the frame.I can see that say, if I wanted to update the time management module,
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Jun 15, 2010
I'm trying to bind a WinForms TreeView control to some user-defined objects. In particular, I'd like to bind aTreeNode.Text property to myObject.Name. My strategy is to create xTreeNode, a subclass of TreeNode, add a DataBindings collection, and expose its Text property.
This would allow me to write some code like this:
Dim oBinding as Binding
Dim bs as New BindingSource
bs.DataSource = myObj
[code]....
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May 18, 2012
a debate has been sparked here about the use of the strategy pattern in my classes.
Basically, I have a 'Shape' object that is an interface 'IShape'. We have 'Circle', 'Rectangle' and 'Elongated' that are the concrete classes that must implement the IShape interface.
[Code]...
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Dec 6, 2009
Im a new in this VS2008. But i have some foundation of programming in VB6.0. So im planning to create this application using VB since im familiar in that language.I downloaded a Visual Studio 2008 and SP1 - now on its 90-day trial, and planning to buy the full version depending if it will meet my needs. I just read afterwards the conditions and how to buy it. I hope its free shipping and credit card is acceptable.^^
I need to make an application something like a reporting system, my plan application is a client-server application. Currently im reading the How to topics and some walkthroughs so far so good. Now here are some sort of details and target need to fulfill.
1. An interface from client that will input the data from the multiple-user , including images and these data will be saved in database/table remote server (center database server) LAN.
[Code]...
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Mar 2, 2011
we changed the mapping from the table per concrete class to the subclass strategy and now the UnitTests fail, but I cannot recognize why.There's one base class Article and a child one SemifinishedArticle with no specific properties.
Article.hbm.xml:
<?xml version="1.0" encoding="utf-8" ?>
<ibernate-mapping xmlns="urn:nhibernate-mapping-2.2"
[code].....
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Aug 5, 2009
I have a usercontrol with a picturebox and a few buttons related to it, such as LoadFromFile, Paste and Zoom (that last one pops up a new form). Is there a way to override the basic Enabled property of the usercontrol so that I can keep the Zoom button active all the time, while turning off the other buttons?
I realize there are 2 "obvious" replies. don't do Enabled=False, create a custom method. do everything in the one form, not a usercontrol, so you can pick and choose disabling. Both are less than ideal, given that I'm putting this control into a couple of existing forms, so I'd like to work around how those forms already behave. So is there a way to override the behavior of my usercontrol when it gets disabled? What would be my best strategy?
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Aug 17, 2011
I have to compare two columns in two different Excel sheets and delete the duplicates. I have come up with several strategies that work, but I am searching for the most efficient way to do this. At first, I was sorting the columns and looping through them in the manner of a sequential update and deleting when the cell values were equal. But I discovered here an article by Mike Rosenblum that explained that it is much more efficient to stick the columns into an array and iterate them from there. So I was able to do that. There was a complication in that once I had deleted a row, then the array and the spreadsheet were out of sync. So I had to compensate by incrementing a variable each time a row was deleted, and subtracting this variable from the array index to calculate the row to be deleted in the spreadsheet.
So now I am wondering whether there is a better strategy. I thought that if I could merely hide the rows to be deleted and then find a way to delete all hidden rows at once after the loop was over, then this would eliminate the problem of the array and the spreadsheet getting out of sync and would make the code easier to understand. I thought of putting the row numbers of the duplicates into another array and deleting the rows after the comparing loop. But this creates the same problem of having to compensate the row numbers in the array.
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Aug 9, 2011
I am trying to write a system that will send an email to my Client and when my client reply I need to read the Email and push it back to proper Record for the Client.We are using Exchange and outlook, For Sending email I am using smtp with custom coding Which automatically record an email content to the Client File howerver how to read the reply as it is coming into outlook of user machine and push it back to the Proper Client record.
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Oct 13, 2011
I have been trying to implement the jQuery weekcalendar using .net. What I can't seem to figure out is why weekcalendar states events.events is undefined after I make an ajax call to a webmethod I created which returns JSON. Below is the relevant code:
[Code]...
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Aug 2, 2009
I want to make Keybord events and mouse events for learning and educational Purpose.
1. In Form any object like A "picture box" move by Arrow keys .
2. Picture Box Contain many Picture i want change Picture With next and Previos By Arrow keys.
3. I contain Voice of alphabet in Mp3.When i Press any button in textbox then its work.
4. Mouse Pointer Change My Own.
5. I click any Object or any thing By mouse its noice clicking sound like Tik Tik Tik.... Question No 3 is very hard to do . but not im possible
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Apr 26, 2009
does anyone know the actual code to put into the my.settings file for this? or something like that I saw it in a post now I cant find it again 0_o .
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Sep 14, 2009
I have created a Trigger in VS2009 in VB.net. I have used a SQL Server Project. Now I have successfully created this Trigger:
' Geben Sie fr das Ziel eine vorhandene Tabelle oder Ansicht ein, und heben Sie die Auskommentierung der Attributzeile auf.
<Microsoft.SqlServer.Server.SqlTrigger(Name:="myTrigger"
, Target:="users"
[CODE]...
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Dec 21, 2009
I am using Expresion Blend 3 and created a new user control in my project. I want a storyboard to run if a custom property of that user control is triggered like with the ones shown here in the list..
I learnt you need a dependency property, but my understanding there is limited. Here's the basic code I set up with property "IsAwesome" as an example[code]...
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Jan 19, 2012
This is my very first trigger and I'm not sure I have it set up correctly. I have a table called PayTypes. Here is my trigger syntax:
[code]...
I run this with a breakpoint on the first line, update my VB.NET datagridview (which updates and saves just fine), but the breakpoint never gets hit. Am I going about the setup of the trigger incorrectly?
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Feb 15, 2012
This is my very first trigger and I'm not sure I have it set up correctly. I have a table called PayTypes. Here is my trigger syntax: ALTER trigger payTypes_trigger on PayTypes AFTER INSERT, UPDATE, DELETEs PRINT 'AFTER TRIGGER EXECUTED SUCESSFULLY' I run this with a breakpoint on the first line, update my VB.NET datagridview (which updates and saves just fine), but the breakpoint never gets hit. Am I going about the setup of the trigger incorrectly?
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Mar 17, 2011
Maybe there is a better way to do this. The jist of I want is to have SQL Server raise me 2 types of errors: a WARNING and an ERROR from a trigger when I update a table. If SQL server returns a WARNING the trigger should COMMIT but show the warning to the user (using .NET - preferably through a SQL Exception which is only raised if severity > 10) and if it is an ERROR the trigger should ROLLBACK and show the ERROR to the user (through a SQL Exception).My attempts (needless to say this isn't working) at this was to have a trigger like this:
ALTER TRIGGER [dbo].[TR_TRANSACTION_UPDATE]
ON [dbo].[tTRANSACTION]
FOR UPDATE
[code]....
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May 13, 2010
If I have my cacheduration set to some value for my Web Service, is it possible to force the function to trigger?
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Sep 14, 2008
I'm having difficulty understanding how to set up a simple trigger. I have two Tables, "Customer" and "Order" Both tables have a "CustomerID" field, where the one in "Order" points to the ID in "Customer". When a record from Customer is deleted, I want all records in "Order" deleted where the CustomerID is the same as the one being deleted from "Customer". Trigger for the Customer Table that would do this?
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Apr 2, 2012
I have a CRM application that I would like to programatically post new records and updates to, based on values in other tables getting inserted or updated. Problem is because of how this CRM app was designed I cannot use straight SQL insert/update SQL commands. This is because the database has some proprietary account#/record ID generation algorithm, and also writes to a log table using some pretty cryptic looking values.
The only way to ensure the integrity of the data is to use a the COM based API they provide. How can I send calls to this API from SQL Server code, I'm guessing a CLR user defined function? Can anyone point me to such tutorial on the web?
The updates I am making MUST be in real time, that is why I need to use a trigger that calls this app's API.
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