SpatialEdmFunctions.StartPoint Method (DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'StartPoint' function with the specified argument, which must have an Edm.Geography or Edm.Geometry result type. The result type 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 StartPoint(
	this DbExpression spatialValue
)

Parameters

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

An expression that specifies the spatial curve value from which the start point should be retrieved.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

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

Exception Condition
ArgumentNullException

spatialValue

ArgumentException

spatialValue

.NET Framework
Available since 4.5
Return to top
Show: