State Machine Workflow - .NET?
Jan 20, 2010
I am creating a very simple state machine class library project in vb.net.This has only 3 states - CreateApplication, ProcessApplication and CompleteApplication.I have an interface created in the same project.I am invoking it from a web application by calling ApplicationService.CreateApplication(obj of ApplicationDetail)
<ExternalDataExchange()> _
Public Interface IApplicationService
Event ApplicationCreated As EventHandler(Of ApplicationDetailEventArgs)
[code]....
My issueis that, when I try to run it I am getting the value of workflowInstance . InstanceId as Empty.
View 1 Replies
ADVERTISEMENT
Oct 25, 2011
I was wondering about what approach to take for writing a state machine or data crunching engine.As such, it wouldn't have any UI component. Since it must be able to talk to other GUI programs, should it be hosted in a DLL? I noticed that there were some State Machine templates for VB but I have no idea how to use them. If
any one could provide some pointers to documentation sample code,
View 3 Replies
Jul 8, 2009
How does one create a workflow app such as url.... What are the .NET objects involved ?
View 2 Replies
Jan 3, 2011
I have worked on .NET 2.0 technologies and now that I want start learning newer technologies, I am currently very confused on how to proceed.
New technologies I am considering consist of AJAX, Workflow, WCF and WPF
Here is my dilemma:
1. Where should I start first?
2. Which technology would allow me quicker understanding?
3. Is there any specific sequence to this learning?
I understand the questions might be stupid; however, this would help me concentrate on one instead of all over the place and archiving nothing.
View 1 Replies
May 5, 2011
I have a C# statement like New Customer(){id=1, name="paul"};Do VB have an equivilent statement that can be used as in expression assign activity in Windows Workflow Foundation.
View 3 Replies
Sep 18, 2009
I have a program that pulls orders from the database and prints packing slips and labels for the warehouse. There are 2 reports that print out every time and the are potentially 7 others that could print for each order. all of the reports will use the same basic information and just present it in different ways (i.e. label, packing slip, international paperwork, etc). the program we are currently using was written in a rush and I know is not efficient. I am pulling the same information several times for each run. I am trying to redo the program the correct way now. What I am asking input for is what do you think the best way to approach this is. I am currently using the System.Collections.DictionaryBase to store all of the information I need. I am thinking of creating more of those to store the information for each of the reports, but that still doesn't seem like the most efficient way to do it either.
View 3 Replies
Apr 12, 2012
I'm making a workflowdesigner to create workflows on a canvas with wpf and vb.net. I have made it possible to draw lines(relations) between objects with a nice function. Now I want to implement a way to delete a relation. I add a onclick handler on the shape but the line is very thin and hard to click. I've heard to draw 2 lines 1 with a thicker stroke thickness, but this isn't possible since the drawline method is heavy on the cpu.
View 2 Replies
Feb 27, 2012
I'm implementing a State Machine in WF 4.0. In some transitions, I have added a condition where I check that some variables have the expected values. The variables are enums and booleans, and everything is fine.
However, now I tried to evaluate when a property is null. I have and argument in my workflow, let's say, 'MyArgument'. In a transition, I try to put a condition like 'MyArgument.MyProperty = Nothing'. I never developed in VB.NET, I don't know if I'm missing something here...
VS2010 gives the following error: "Error 4 Compiler error(s) encountered processing expression "MyArg.MyProp = Nothing".
Operator '=' is not defined for types 'XXXX' and 'XXXX'
The type names are exactly the same, and I have debugged VS2010 to ensure that my assembly is not loaded from 2 different locations.
How can I check if the property is null or not?
BTW, I'm using VS2010 SP 1, with .NET Platform Update 1 installed, on W7 64 bits.
View 1 Replies
Jan 28, 2011
I am developing an app that uses a sql backend database (hosted on a different machine).The app I am developing will be run on 10 different workstations simultaneously.Sometimes the app will change the database in such a way that the database needs to initiate a workflow process and I'm not sure of the best way to do this.Also, when database changes happen, how does one best notify the other app instances that the change has happened, so they know to refresh their data? I was thinking that triggers could help initiate the workflow but it might be nice to develop the actual workflow in .net code.Should I write another App to run as a service on the server and do the work and also to tell the client apps when things change?
View 1 Replies
Dec 9, 2010
I develop an application using vb.net.application will run on client server architecture.when we try to execute the program in client side then it will give me an error which is related to sqlclientexception.how can i handle this situation.i used vb.net 3.5 as front end and sql server 2000 as back end.i have done total coding with system.data.sqlclient namespace.
View 6 Replies
Dec 21, 2010
I've inherited a lot of custom made software for an office, and, while managing it, I've found it performs differently from machine to machine.I mean, some controls get painted in weird ways in some machines but well in another, or just work differently, like in some machines clicking something selects it, and in the next machine clicking the same thing makes it editable.I suspect, o course, of the myriad of DLL the software loads
View 2 Replies
Jan 21, 2008
I want to block a perticular machine from accessing my machine..Both the machines are in LAN..I dont want a perticular machine to access my computer How can i achieve this...I want to do this using VB.NetAny idea....
View 9 Replies
Nov 3, 2011
I need codes for vb.net Getkeystate Function() without using any DLL.I'm beginner for API Conversion from vb to vb.net.In vb6 they using user32 DLL.In Vb.Net i need to call Getkeystate Function without that "User32.dll" function. can any one post me the codes without using dll?
Is there any way to get key state without using that dll Getkeystate function in vb.net..? if equivalent is any one know means show me that codes.that codes should be work with in .net framework.[code]...
View 2 Replies
Mar 19, 2011
How do I detect the state of the INS-key on the keyboard? MS somehow forgot to implement it in My.Computer.Keyboard...
View 3 Replies
May 1, 2012
In a VB.net app, I have several checkboxes created with regular ASP controls, i.e.asp:CheckBox ID="cb3" runat="server" Checked="true" />I'm trying to implement a "Select all/none" functionality but I'm having a few problems. The Javascript is not changing the state of the checkboxes in Internet Explorer (v9). I tried debugging with IE's dev tools and the checkboxes are definitely getting their checked property set to true. (Also tried setting to "checked".) Here is the JS:
function setCheckboxes( state )
{
var inputs = document.getElementsByTagName("input");
[code]......
View 3 Replies
Feb 3, 2011
I'm looking for some smart ideas on how to quickly find all usage of session state within an existing asp.net (MVC) application.
The application in question was the subject of outsourced development, and has been running fine in production. But we recently realised that it's using InProc session state rather than (our preferred route) StateServer.
In a small scale test, we switched it over to StateServer, and all worked fine. However, when we deployed to production, we suddenly experienced a large number of errors. I'm not sure if these errors were caused by this change (they were actually complaining about database level problems), but removing the change allowed the application to function once again (this may have just been because it caused a recycle to occur).
So before I try switching it again, I'd like to perform a thorough audit of all objects being placed in the session (I'd previously taken a quick look at a couple of controllers, and they seemed fine). If I had full control over the code, this is the kind of place where I'd just comment out the class (to compile and find the various ways of reaching the session class), then comment out the accessors, hit compile, and visit each error. But I can't do that with built in .NET framework types.
I decided to try using Reflector. I've analyzed the "Used By" for each of the following:
System.Web.HttpSessionStateBase.set_Item(String, Object) : Void
System.Web.SessionState.HttpSessionState.set_Item(String, Object) : Void
System.Web.SessionState.HttpSessionState.set_Item(Int32, Object) : Void
[Code]....
View 2 Replies
Apr 12, 2011
I have a label's value that is posted back from a previous page and I want to use this label to do a simple calculation in the current page, but when I do the calculation the page (refreshed) the value of this label and automatically deleted the value (Since there would be no value in postback when it refreshed).
Here is the code behind file:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Label2.Text = Request.Form("Hidden1")
End Sub
and here where I want to use the label
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim Stotal As String
Stotal = Val(Label2.Text) * 10
Label3.Text = Stotal
End Sub
How can I save the value in the page via view state or any other method?
View 1 Replies
Apr 23, 2011
when they say static classes should not have state/side effects does that mean:
static void F(Human h)
{
h.Name = "asd";
[code].....
View 3 Replies
Aug 15, 2011
Here is, basically, how my application works:
When windows starts, my app starts. Whenever my app is running, it hides the desktop, taskbar, etc... When a button is clicked in my application ("Start program"), then my application will set its visible property at false and another application will start.
Everything seems to work perfect except I need a way for my application to set its visible property back to true, but only once the other application that was started earlier, is closed (no longer running.)
My thought was that I could use a timer to check for the applications state every so many seconds:[code...]
I have 2 concerns with this:
1. A timer checking this every few seconds will invoke unneeded stress on a computer since they are running for sometimes very long periods of time.
2. There is a better way to accomplish this that doesnt rely on a timer.
View 2 Replies
Aug 25, 2011
Why does this not work?
[Code]...
View 4 Replies
Dec 6, 2009
My ISP's DNS server goes down all of a sudden sometimes. This is very annoying while surfing the internet. So, I'm trying to make an application which has the following characteristics :
Runs in system tray
Pings the server periodically
Notifies when the server becomes unreachable/active
Now, I know that the existing workarounds are to use OpenDNS or ping <IP Address> -t in command prompt. I don't want to use them... the reason being that the former gives much higher pings than my DNS & for the latter, I'll have to switch windows.
View 5 Replies
Jun 24, 2012
I can create a checkbox array as follows
Code:
For n = 0 To 13
With (chkboxarray(n))
.Tag = n + 1 ' Tag of button
.Width = 35 ' Width of button
[code]....
But when I run the program the checkboxes only display 2 states (they do work as 3 states). what I am missing to display the "Indeterminate" state?
View 8 Replies
Apr 13, 2010
im trying to figure out how on earth to set a checkbox on a DataRepeater row to true. Nothing ive tried seems to work. Ive searched all over, and all i seem to find is ways to check the state and in ASP.
Text boxes would be:DataRepeater1.CurrentItem.Controls(
"textbox1").Text = textbox2.Text.However, checkboxes wont work in this way. DataRepeater1.CurrentItem.Controls("Checkbox1").Checked = True"Checked is not a member of windows.forms.control" - ive tried various things in order to set it to true/false, but whatever i do doesent work. I expect its going to be something stupidly simple, but its those things that annoy the most IMO!
View 1 Replies
Feb 3, 2011
I'm trying to detect the state of num lock but haven't had any luck. using a windows 7 x64 machine.
Declare Function GetAsyncKeyState Lib "user32" (ByVal vKey As System.Windows.Forms.Keys) As Short
'num lock check timer
[Code]....
View 7 Replies
Jun 7, 2011
form 1 has a list of checkboxes on itform 2 needs to check if one of the form 1 checkboxes is checked.
texton is a value passed from a function parameter of type string
If (Form1.Controls.Item("checkbox" & texton).checkstate" = True) Then
'Do Something
[code]......
View 2 Replies
Jul 27, 2011
How do I get the Compressed state of a file[code]...
View 10 Replies
Dec 24, 2009
I add one checkboxcolumn in design time in the page load I set the value false like this
DataGridView1.Rows(0).Cells(0).Value =
False
Then in the CellContentClick Event I get the current value of Checkboxcell then change the state of the checkboxcell according the value like this
Private Sub DataGridView1_CellContentClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
If e.ColumnIndex = 0 AndAlso e.RowIndex > -1 Then
Dim ched As Boolean = DataGridView1.Rows(e.RowIndex).Cells(e.ColumnIndex).Value
[Code] .....
View 2 Replies
Jun 27, 2009
How to get dialup connection state in VB.NET 3.5?
View 1 Replies
Sep 2, 2009
How do I get the current state of Num Lock in VB.NET?
View 1 Replies
Aug 20, 2011
I'm developing a program (VB.NET Form) that has printing function, then i have to alert user when an error occurred such as paper out, paper jam or etc. I found that .NET has WIN32_Printer class use for retrieve printer information and status. I can get printer status (Idle, Printing) correctly except offline, but for DetectedErrorState... always get 0 if printer has no problem and 2 if any problem found. (from reference 0 means Unknown and 2 means No Error) How can i get printer state correctly? Is this related to printer manufacturer or their driver? Because their application can alert correctly, i guess that driver never return value to WIN32 Class.
View 5 Replies
