{"id":1021,"date":"2011-12-09T12:18:33","date_gmt":"2011-12-09T16:18:33","guid":{"rendered":"https:\/\/clarionsharp.com\/blog\/?p=1021"},"modified":"2011-12-09T12:18:33","modified_gmt":"2011-12-09T16:18:33","slug":"net-appgen-release","status":"publish","type":"post","link":"https:\/\/clarionsharp.com\/blog\/net-appgen-release\/","title":{"rendered":".Net AppGen release"},"content":{"rendered":"

Download instructions are going out today for the initial release of the .Net AppGen.\u00a0 We have two new newsgroups setup;<\/p>\n

For questions on writing T4 templates
\nsv.clarion.T4.WritingTemplates<\/p>\n

For questions on using the T4 templates
\nsv.clarion.T4.TemplateHelp<\/p>\n

We’ll make a decision on whether to host the T4 template project on our Subversion server or on Codeplex next week.<\/p>\n

Here is an excerpt from the “getting started” document that’s included in the download:<\/p>\n

.NET offers many choices for application architecture; from placing the data access code directly in the
\nUI through datasets and data source controls, to creating a data access layer that talks to the database,
\nand using an n-tier architecture approach that consists of multiple layers and objects to pass data back
\nand forth.<\/p>\n

While embedding data access and business rule code directly into the UI is generally easier, in some
\ncases it\u2019s not the best approach for a given project.<\/p>\n

.NET supplies a data control structure called the ObjectDataSource which gives us the possibility to use a
\n3 tier design model. It supports an architecture whereby all Sql commands are embedded into a middle
\ntier. You only have to supply the underlying object and map the methods from the Business Layer to the
\ndifferent Sql commands.\u00a0 And while I am talking about Sql and ADO.Net right now, take a look at the
\nimage below.\u00a0 The data access layer can (and soon will) support using the Clarion Driver technology;
\nboth direct drivers and thru the IP driver, as well as other access approaches like using a webservice.<\/p>\n

\"n-tier<\/a><\/p>\n

In this initial release of the .Net AppGen the templates for both Web and WinForm make use of the
\nsame 3 tier architecture using the ObjectDataSource. This first release supports ADO.Net for the data
\naccess, and our next update will utilize the same 3-tier architecture; but the data access layer uses
\nClarion drivers and our LinqToFile provider.<\/p>\n

We realize that this release can be a bit of a leap \u2013 moving from the ABC data access layer or direct
\ndriver use in the Clarion chain to a 3-tier architecture model means there is a bit to learn.\u00a0 But it\u2019s well
\nworth exploring it, even if after the fact you choose to keep your development closer to our Win32
\nmodel (we intend to support that as well). The same n-tier architecture model will be implemented in
\nfuture templates to support using other object-relational mapping frameworks; like Microsoft\u2019s Entity
\nFramework and nHibernate.<\/p>\n

If you follow along with the steps below (for either Web app or WinForm) you\u2019ll end up with a
\n\u201cEnterprise architecture\u201d style 3-tier app, and possibly find that you like it. Most of the problems that
\nyou will run into come in 2 flavors; ADO.Net connection strings that refuse to connect but return no
\nerrors (usually a backend config issue), and for web apps; IIS configuration issues. Hopefully your trip will
\navoid them but don\u2019t be surprised if you have to battle configuration issues.
\n3 tier Application<\/p>\n

We\u2019ll create two projects for our web application.\u00a0 We\u2019ll first create the Model application; this will
\ncreate a reusable assembly (DLL) that defines and contains all of our data access objects to be used in
\nour Web Application.<\/p>\n

………………………..<\/p>\n

For the rest of the story refer to the GettingStartedWithT4templates.pdf in the download!<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Download instructions are going out today for the initial release of the .Net AppGen.\u00a0 We have two new newsgroups setup; For questions on writing T4 templates sv.clarion.T4.WritingTemplates For questions on using the T4 templates sv.clarion.T4.TemplateHelp We’ll make a decision on whether to host the T4 template project on our Subversion server or on Codeplex next … Continue reading .Net AppGen release<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[],"class_list":["post-1021","post","type-post","status-publish","format-standard","hentry","category-clarionnews"],"yoast_head":"\n.Net AppGen release - Clarion<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/clarionsharp.com\/blog\/net-appgen-release\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\".Net AppGen release - 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