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SpatialEdmFunctions.StartPoint(DbExpression) Method

Definition

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.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ StartPoint(System::Data::Common::CommandTrees::DbExpression ^ spatialValue);
public static System.Data.Common.CommandTrees.DbFunctionExpression StartPoint (this System.Data.Common.CommandTrees.DbExpression spatialValue);
static member StartPoint : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression
<Extension()>
Public Function StartPoint (spatialValue As DbExpression) As DbFunctionExpression

Parameters

spatialValue
DbExpression

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

Returns

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

Exceptions

spatialValue

spatialValue

Applies to