System.ComponentModel.DataAnnotations (DataType enumeration)

Represents an enumeration of data types associated with data fields and parameters.

public enum DataType

Inherit
Object $⟶$ ValueType$⟶$ Enum $⟶$ DataType

Field

Field	length	Description
Credit Card	14	Represents the credit card number.
Currency	6	Represents monetary value.
Custom	0	Represents a custom data type.
Date	2	Represents the date value.
DateTime	1	Indicates a specific time, expressed in terms of date and time of day.
Duration	4	Represents a continuous period of time that the object exists.
EmailAddress	10	Represents an email address.
Html	8	Represents an HTML file.
ImageUrl	13	Represents the URL of the image.
MultilineText	9	Represents multiple lines of text.
Password	11	Represents the password value.
PhoneNumber	5	Represents the phone number value.
PostalCode	15	Represents the postal code.
Text	7	Represents the displayed text.
Time	3	Represents the time value.
Upload	16	Indicates the file upload data type.
Url	12	Represents the URL value.

Example

The following example uses DataTypeAttributethe attribute to customize AdventureWorksLTthe database customertables EmailAddressdisplay data fields. The e-mail address is displayed as a hyperlink, rather than as simple text inferred from internal data types by ASP.NET dynamic data.
Sample code:

• Metadata partial class that implements related tables and associated metadata classes.
• DataTypeAttributeBy EmailAddressspecify enumeration value associated metadata category, the characteristic is applied to EmailAddress
  the data field. This will display the "body" field template for the email address display.

using System;
using System.Web.DynamicData;
using System.ComponentModel.DataAnnotations;

[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{
    
    
}

public class CustomerMetaData
{
    
    

    // Add type information.
    [DataType(DataType.EmailAddress)]
    public object EmailAddress;
}

To compile the code example, the following components are required:

• Visual Studio 2008 Service Pack 1 or Visual Developer 2008 Express Edition Service Pack 1.
• AdventureWorksLT sample database. For information on how to download and install the SQL Server sample database, see Microsoft SQL Server Product Sample: Database. Make sure to install the correct sample database version for the version of SQL Server running (SQL Server 2005 or SQL Server 2008).
• A website with dynamic data. This allows you to create a data context for the database, and create a class that contains the data fields you want to customize, and the methods to override. In addition, it creates an environment for using the previously mentioned pages. For more information, see Walkthrough: Use scaffolding to create a new dynamic data website.

For custom field templates for EmailAddressa complete code sample data fields, see DataTypeAttributeproperty.

annotation

This enumeration is used to specify the data type to be associated with the data column or parameter. Use DataTypeAttributeattribute class to specify the data type associated with the data fields or parameters. Select the data type in this enumeration.
DataTypeAttributeThe feature allows you to mark fields with more specific types than the internal types of the database. For example, a string data field containing an email address can be attributed using enumerated values EmailAddress. This information can be accessed by field templates and can modify the way the data fields are processed.