SpatialEdmFunctions.SpatialElementAt Method (DbExpression, DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'SpatialElementAt' function with the specified arguments. The first argument must have an Edm.Geography or Edm.Geometry result type. The second argument must have an integer numeric result type. The result type of the expression is the same as that of spatialValue.

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

public static DbFunctionExpression SpatialElementAt(
	this DbExpression spatialValue,
	DbExpression indexValue
)

Parameters

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

An expression that specifies the geography or geometry collection value.

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

An expression that specifies the position of the element to be retrieved from within the geometry or geography collection.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that returns either the collection element at position indexValue in spatialValue or null if spatialValue is not a collection.

Exception Condition
ArgumentNullException

spatialValue

ArgumentNullException

indexValue

ArgumentException

spatialValueindexValue

.NET Framework
Available since 4.5
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