8: SharePoint Workflow in Visual Studio .NET

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8: SharePoint Workflow
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Figure 8-33: Converted workflow in Visual Studio 2010
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Workflows in SharePoint Designer
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Figure 8-34: CodeActivity in imported workflow
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Listing 8-5: ExecuteCode Method Implementation
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8: SharePoint Workflow
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In the first couple of lines of code we are getting the SharePoint site and web information Because we don t know if the archive site is already created we are calling the TryGetList method This method returns the actual list or returns null if the list doesn t exist In the if statement block we check to see whether the list is there yet, and if it isn t there we create it To create the list we pass the list title, description, and list template type to the Add method Now that the archive list is created we get the source list and the actual item we want to copy Finally, we just copy the current item to the target list You can press F5 at this point to deploy the workflow and then verify that the activity we added in Visual Studio 2010 works together with the functionality created in SharePoint Designer After the workflow completes, the workflow copies the item on which you started the workflow to the archive list
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Conclusion
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In this chapter we sailed through the world of workflows trying to touch upon the most important and interesting things You learned about the base building blocks of workflow activities The tables provided in this chapter with descriptions of available activities can serve as a starting point when trying to decide if you need to develop a custom activity or use an existing one The examples provided in this chapter are simple yet they contain the elements that every workflow uses We also saw how workflow support in SharePoint Designer could be the right tool for you to get started with workflow development You can import your reusable workflows to Visual Studio 2010, modify them, and try to learn as much as you can from them, and you will be developing SharePoint code workflows in no time
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SharePoint Web Parts
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Introduction to Web Parts
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Web parts are a great way to structure your SharePoint site to make different data or different applications accessible on the same page Think about a SharePoint intranet site that is used by executives to get sales reports on their different products, headcount information for their different divisions, and the latest financial news Because executives usually want to have all the important information in one place, web parts are a great solution to have all this data displayed on a single SharePoint web part page The page could have a web part showing the reports from a reporting server or analysis server, another web part showing divisional headcount information, and a web part for reading a news feed from the Financial Times Since web parts run in the security context of the user of the SharePoint site, the executive would be able to access the data from the reporting server or the other data stores without reentering credentials In the past, developing SharePoint web parts hasn t been as easy as developing ASPNET web parts The main reason is that there were no visual designers available to develop those types of web parts The differences in deploying a web part to an ASPNET site versus deploying a web part to a SharePoint site was also an issue With the introduction of the visual web part designer in Visual Studio 2010 creating web parts has never been easier
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9: SharePoint Web Parts
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In this chapter we will learn how to create visual web parts, web parts created with code only, and Silverlight web parts
Web Part Fundamentals
Before we start building our first web parts we should have a look at the web part infrastructure in SharePoint If you have already worked with ASPNET web parts you should consider this section to be a refresher Web parts are ASPNET server side controls that run in the context of a web part page and allow users to edit and modify the controls in the browser A web part page is an ASPNET page that has web part zones defined that serve as placeholders for the web parts to be added Each web part page has a web part manager object that tracks which web parts have been added to each particular zone, and stores and retrieves data about how each web part has been customized and personalized A SharePoint web part page does not use the ASPNET WebPartManager and WebPartZones classes directly instead it uses its own classes called SPWebPartManager and SPWebPartZone, which inherit from the corresponding ASPNET classes SharePoint 2010 supports two types of web parts: ASPNET 20 web parts, which derive from SystemWebUIWebControlsWebPartsWebPart, and older style SharePoint web parts, which derive from Microsoft SharePointWebPartPagesWebPart In this chapter we will use the newer ASPNET 20 web parts, which derive from SystemWebUIWebControls WebPartsWebPart