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Elevation Method
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SpatialEdmFunctions.Elevation Method

.NET Framework 4.6 and 4.5

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.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type DbExpression. 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).

ExceptionCondition
ArgumentNullException

spatialValue

ArgumentException

spatialValue

.NET Framework

Supported in: 4.6, 4.5
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