code to generate barcode in vb.net Using the State Activity in C#

Make UPC-A Supplement 2 in C# Using the State Activity

Using the State Activity
GS1 - 12 Maker In C#.NET
Using Barcode printer for Visual Studio .NET Control to generate, create UPC-A Supplement 5 image in .NET framework applications.
www.OnBarcode.com
Decode UPC A In C#
Using Barcode scanner for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Perhaps not too surprisingly, the State activity models a state in your state-based workflow. It s a composite activity, but it s limited to accepting only certain types of activities as children: the EventDriven activity, the StateInitialization activity, the StateFinalization activity, and other State activities. The EventDriven activity waits for the events that will cause a transition to another state, while StateInitialization and StateFinalization are activities guaranteed to execute when a state is transitioned into and out of, respectively. It might seem odd to be able to drop a secondary State activity into an existing State activity, but the intent is to provide the capability for embedding child state machines within parent state machines. There is also a restriction regarding the number of valid activities your state can contain. Only a single instance of StateInitialization and StateFinalization is allowed. You can have one of each, but not more than one of each. Neither is required. However, nothing says you can t have one or more instances of child EventDriven and State activities. In fact, it s common to find multiple EventDriven activities, because each event might cause a transition to a different state. For example, a disapprove event might transition to the final state, while an approve event might transition to a state designed to request more approval. As for State activities, clearly more than one should be allowed if you are to create embedded state-based workflows. State-based workflows with a single state model a simple sequential workflow, so in that case you should probably use a sequential workflow directly. In any case, to use the State activity, simply drag an instance from the Toolbox onto the visual workflow designer. The only requirement is the workflow itself must be a state-based workflow rather than sequential. Then decide what child activities your state should maintain, and drag and drop them as required, keeping in mind the four types of activities you can insert.
Draw Bar Code In C#.NET
Using Barcode encoder for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Barcode Recognizer In Visual C#.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Using the SetState Activity
Draw UPC Symbol In .NET Framework
Using Barcode generator for ASP.NET Control to generate, create UPC Code image in ASP.NET applications.
www.OnBarcode.com
Encoding UPC-A Supplement 5 In VS .NET
Using Barcode creator for Visual Studio .NET Control to generate, create UPC-A image in VS .NET applications.
www.OnBarcode.com
In a purely electronic system, one made using electrical components (your computer s processor, for example), the fact that an event fires is enough to transition from one state to another. The presence of an electrical voltage or voltages sets in motion everything that s required for a state change.
UPC-A Supplement 5 Creation In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create UCC - 12 image in .NET framework applications.
www.OnBarcode.com
Print European Article Number 13 In C#.NET
Using Barcode creator for .NET Control to generate, create GS1 - 13 image in VS .NET applications.
www.OnBarcode.com
14
Create Universal Product Code Version A In C#
Using Barcode creation for VS .NET Control to generate, create UPC-A Supplement 5 image in Visual Studio .NET applications.
www.OnBarcode.com
Making Data Matrix ECC200 In C#.NET
Using Barcode generator for VS .NET Control to generate, create Data Matrix ECC200 image in VS .NET applications.
www.OnBarcode.com
State-Based Workflows
Draw QR Code JIS X 0510 In C#
Using Barcode generation for .NET Control to generate, create QR image in Visual Studio .NET applications.
www.OnBarcode.com
2 Of 5 Standard Drawer In C#
Using Barcode maker for .NET Control to generate, create 2/5 Industrial image in Visual Studio .NET applications.
www.OnBarcode.com
WF is not an electronic system, even if it is executed on your system s processor. What this means to you is that firing an event your design specifies as the signal for a state change is not enough to transition to the other state. Instead, you must insert another activity SetState. The SetState activity, interestingly enough, isn t one of the activities you can drop into the State activity directly. Why is this Because the State activity knows that something must trigger a state change. If you could drop SetState directly into State, when that state was entered it would immediately be transitioned out of. The state is then meaningless. Instead, you drop an instance of SetState into two of the other three valid State child activities. Although it s more common to find SetState in EventDriven activities (changing to a new state as a result of an event), you will from time to time find it useful to drop SetState into StateInitialization. I do this in this chapter s sample application when the initial state merely sets things up for the remaining states. You cannot drop an instance of SetState into StateFinalization. StateFinalization is invoked when the particular state is being transitioned out of, so a previous instance of SetState would have already executed. It s too late to change your mind when StateFinalization is executing. So aside from dropping an instance of SetState into your state s EventDriven or StateInitialization activities, how does it actually cause a transition to a different state The answer is simply that SetState s TargetStateName property should be set to the name of the state to be transitioned to. Tip The visual workflow designer in Microsoft Visual Studio makes setting the TargetStateName easier by keeping track of all the states in your workflow and then presenting them to you in a drop-down list when you click on the TargetStateName property. For this reason, it s often better to drop all the states you ll require into your workflow before wiring them up using instances of SetState. When the workflow runtime encounters a SetState activity when executing your workflow, it searches for the State activity bearing the same name as specified in the TargetStateName property. That state is then queued for execution. In the visual workflow designer, this is represented by an arrow traveling from the SetState activity to the state it indicates.
PDF417 Creation In Java
Using Barcode drawer for Android Control to generate, create PDF 417 image in Android applications.
www.OnBarcode.com
PDF 417 Drawer In Java
Using Barcode generation for Java Control to generate, create PDF-417 2d barcode image in Java applications.
www.OnBarcode.com
Make Code 128B In Java
Using Barcode generator for Android Control to generate, create Code 128 image in Android applications.
www.OnBarcode.com
Scanning UPC-A Supplement 2 In C#
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
UPC-A Scanner In VB.NET
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
PDF-417 2d Barcode Maker In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create PDF417 image in .NET applications.
www.OnBarcode.com
Make USS Code 128 In Java
Using Barcode creator for Java Control to generate, create Code-128 image in Java applications.
www.OnBarcode.com
PDF 417 Maker In None
Using Barcode drawer for Word Control to generate, create PDF 417 image in Office Word applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.