SpatialEdmFunctions.Elevation Method (DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'Elevation' function with the specified argument, which must have an Edm.Geography or Edm.Geometry result type. The result type of the expression is Edm.Double.

Namespace:   System.Data.Common.CommandTrees.ExpressionBuilder.Spatial
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbFunctionExpression Elevation(
	this DbExpression spatialValue
)

Parameters

spatialValue
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the spatial point value from which the elevation (Z co-ordinate) value should be retrieved.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that returns either the elevation value of spatialValue or null if spatialValue is not a point.

Exception Condition
ArgumentNullException

spatialValue

ArgumentException

spatialValue

.NET Framework
Available since 4.5
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