Type Mapping

This article is relevant to entity models that utilize the deprecated Visual Studio integration of Telerik Data Access. The current documentation of the Data Access framework is available here.

Telerik Data Access supports flexible mappings from .NET types (e.g., System.String) to database specific SQL types (e.g., VARCHAR on VistaDB). The default mappings can be customized for a specific datastore. The mapping for specific fields can also be customized. Mappings are resolved by first using any information specified for the field, then looking up a generic type for the type of the field using the .NET Type Mapping, then converting this generic type into actual SQL type information using the Generic Type Mapping. You can have different mapping information for each database supported by Telerik Data Access.

The following table shows the default mapping from .NET types to VistaDB specific types:

.NET Type	Vista DB
System.Boolean	BIT
System.Char	CHAR(1)
System.SByte	SMALLINT
System.Byte	SMALLINT
System.Int16	SMALLINT
System.UInt16	INT
System.Int32	INT
System.UInt32	BIGINT
System.Int64	BIGINT
System.UInt64	DECIMAL
System.Single	REAL
System.Double	FLOAT
System.String	VARCHAR(255)
System.DateTime	DATETIME
System.Decimal	DECIMAL
System.Guid	UNIQUEIDENTIFIER
Byte[]	IMAGE