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To successfully let business logic drive the user interface, you need an extensive library of business rules. Here are the additional business rules available as attributes. In my “Peter’s Soapbox”, you will find attributes that I feel need to be provided to complete the library....
Scaffolding is a term that describes letting the business logic determine the list of columns and tables displayed in your user interface. You see it in action when using Dynamic Data’s Page Templates. Yet, it is fine to explicitly define the list of columns in your user interface code, especially when you need flexibility in your layout from column to column.
The ScaffoldColumnAttribute and DisplayAttribute are both used to identify if a column is included or excluded. ...
Each column has a name taken from the database. Yet there are many ways to display text about the column which does not match the column’s name. The DisplayAttribute (introduced in ASP.NET 4) provides the following properties that are available to your user interface:...
The DataTypeAttribute impacts the “data type” of a column. When defined in the database or a programming language, data types are integers, decimals, strings, etc. We use these to hold all kinds of real world types.
Each of these real-world data types have differences in their business rules. The user interface should respect these differences by using different data entry controls (like DateTextBox, Calendar, IntegerTextBox, etc) and validators....
Validation attributes focus on evaluating data to report errors. The base class is System.ComponentModel.DataAnnotations.ValidationAttribute. It defines the IsValid() method, which is always overriden to evalutate the data. It also supplies the ErrorMessage property, where you can describe the error reported....
The System.ComponentModel.CategoryAttribute has long been around. It’s generally used for annotating properties on web controls so that design mode’s Property Editor can organize your properties. I think the CategoryAttribute makes a lot of sense as business...
.net 4 introduces the CustomValidationAttribute , a member of System.ComponentModel.DataAnnotations that supports validation of your business logic. Until now, validation rules were limited based on the available attributes (required, stringlength, regex...
Since a major goal of Dynamic Data is to separate the business logic from the user interface, let’s look at a few areas where these concepts still blend and their alternatives. Today we look at the… DataSource controls In the previous parts, we explored...
Since a major goal of Dynamic Data is to separate the business logic from the user interface, let’s look at a few areas where these concepts still blend and their alternatives. Today we look at the… ValidationAttribute The System.ComponentModel.DataAnnotations...
Since a major goal of Dynamic Data is to separate the business logic from the user interface, let’s look at a few areas where these concepts still blend and their alternatives. Today we look at the… UIHintAttribute Attributes like System.ComponentModel...
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