rad web applications with asp.net dynamic data
DESCRIPTION
RAD Web Applications with ASP.NET Dynamic Data. Ingo Rammer [email protected]. Ingo Rammer and thinktecture . Support and consulting for software architects and developers Application Optimization, Troubleshooting, Debugging Architectural Consulting and Prototyping - PowerPoint PPT PresentationTRANSCRIPT
RAD Web Applications with ASP.NET Dynamic DataIngo [email protected]
Ingo Rammer and thinktecture
• Support and consulting for software architects and developers
Application Optimization, Troubleshooting, DebuggingArchitectural Consulting and PrototypingDeveloper-Coaching and -MentoringArchitecture and Code Reviews
• http://www.thinktecture.com• [email protected]
ASP.NET Dynamic Data• Customizable model/class-driven
frontend technologyToday: Linq-to-SQL and Entity FrameworkScaffoldingHighly customizable
• But more important:Dynamic Data Controls
Customizable Scaffolding• Scaffolding – Automatic Form Generation• Customizable UI („No Limits“ – it‘s
all .NET)• Configurable MVC-style URL routing• Default: Querystring, but can be
changed to routing like:http://server/Customershttp://server/Customers/ALFKIhttp://server/Customers/ALFKI/Edit... or any other routing you can imagine
Extensibility• Extension Model for logical schema
(Entity Framework or Linq-to-SQL)ValidationBusiness Rules
• Sorting, Filtering, Edit, Insert, Delete• .NET Framework 3.5 SP1 (+ Hotfix)
Scaffolding• The first thing you‘ll see at every
demoZero code data forms (but still: customizable whenever you want!)Simply uncomment the following line
• This enables scaffolding for all entities
// Global.asax in Application_Start
model.RegisterContext (typeof(NorthwindEntities), new ContextConfiguration() { ScaffoldAllTables = true });
Restricted Scaffolding• Attributes on a class-level or field
level• Field level supports metadata-
redirection with [MetadataType][ScaffoldTable(true)][MetadataType(typeof(ProductsMetaData))]public partial class Products{}
public class ProductsMetaData{ [ScaffoldColumn(true)] public object Name;}
Customizating Templates• Templates
Page Templates („all List Pages“, „all Detail pages“)Field Templates („all Integer TextBoxes“)
• Custom PagesUse a particular ASP.Net page for List,Detail,Edit and/or Insert
Can be done globally or configured with routingCan use DynamicField/DynamicControl with UIHints on them
Creating a Custom Page• Simply create a folder in CustomPages
named like your entity and copy/paste one of the existing ASPX pages
• Create a folder name with the exact same name as your entity class
• Copy and paste the desired ASPX file from PageTemplates to CustomPages/EntityName
• Done! (no configuration necessary)
Sample Custom Page<asp:DetailsView DataSourceID="DetailsDataSource" AutoGenerateRows="false"> <Fields> <asp:DynamicField DataField="ProductName" /> <asp:DynamicField DataField="QuantityPerUnit" HeaderText ="Quantity" /> <asp:DynamicField DataField="UnitPrice" /> <asp:DynamicField DataField="UnitsInStock" /> <asp:DynamicField DataField="Categories" /> <asp:TemplateField> <HeaderTemplate>Name</HeaderTemplate> <ItemTemplate> Templated: <asp:DynamicControl
runat="server" DataField="ProductName" /> </ItemTemplate> </asp:TemplateField> </Fields><asp:DetailsView>
Customizing the Model• [UIHint]: Use a certain control for a field • [DataType]: custom type (it’s just a string) which
can later be used by the field template („EmailAddress“, „Url“)
• [DisplayFormat]: Use a certain format string for one field
• [DisplayField]: Use this column for foreign key values of this table (ex: display the field „Name“ for Customers)
• And more: Whatever you want/need to later check in a custom input control. Create custom Attributes as needed
Custom Fields• Create a ASCX in /FieldTemplates,
derive from FieldTemplateUserControl and override DataControl
• Possible: Override FormatFieldValue, ExtractValuesUse MetaDataAttribute. TypeOf<T>() to get access to attributes defined on the field in the model
Embedding DD• Using DynamicData on an unrelated
ASPX page• Hint: It's just like the custom page!• Create a DataSource, Parameters,
DetailView, GridView or ListView and you're ready to go ...
In-Depth Customization• There are hardly any limits, DD fits
very nicely with ASP.NET• You‘ve already seen: custom fields,
custom pages• Missing pieces is: which fields get
displayed, in what order?• IAutoFieldGenerator: specifies which
fields should be displayed
Future• Preview can be downloaded
(ASP.NET Dynamic Data 4.0 Preview 2)
• Different data access layersASP.NET Data Services & custom data layers
• Query BlocksFiltering with LINQ Expressions
• Additional Field Templates (Enum, Email, Url)
