Export (0) Print
Expand All
This topic has not yet been rated - Rate this topic

DbExpressionBuilder.Constant Method (TypeUsage, Object)

.NET Framework 4.5

Creates a new DbConstantExpression of the specified primitive type with the given constant value.

Namespace:  System.Data.Common.CommandTrees.ExpressionBuilder
Assembly:  System.Data.Entity (in System.Data.Entity.dll)
public static DbConstantExpression Constant(
	this TypeUsage constantType,
	Object value


Type: System.Data.Metadata.Edm.TypeUsage

The type of the constant value.

Type: System.Object

The constant value to represent.

Return Value

Type: System.Data.Common.CommandTrees.DbConstantExpression
A new DbConstantExpression with the given value and a result type of constantType.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type TypeUsage. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

value or constantType is null.


value is not an instance of a valid constant type, constantType does not represent a primitive type, or value is of a different primitive type than that represented by constantType.

.NET Framework

Supported in: 4.5.1, 4.5

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

© 2014 Microsoft. All rights reserved.