SpatialEdmFunctions.StartPoint(DbExpression) Method
Definition
Important
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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
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