SpatialEdmFunctions.PointAt(DbExpression, DbExpression) Method
Definition
Important
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Creates a DbFunctionExpression that invokes the canonical 'PointAt' 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.
public static System.Data.Entity.Core.Common.CommandTrees.DbFunctionExpression PointAt (this System.Data.Entity.Core.Common.CommandTrees.DbExpression spatialValue, System.Data.Entity.Core.Common.CommandTrees.DbExpression indexValue);static member PointAt : System.Data.Entity.Core.Common.CommandTrees.DbExpression * System.Data.Entity.Core.Common.CommandTrees.DbExpression -> System.Data.Entity.Core.Common.CommandTrees.DbFunctionExpression<Extension()>
Public Function PointAt (spatialValue As DbExpression, indexValue As DbExpression) As DbFunctionExpressionParameters
- spatialValue
- DbExpression
An expression that specifies the spatial line string value.
- indexValue
- DbExpression
An expression that specifies the position of the point to be retrieved from within the line string.
Returns
A new DbFunctionExpression that returns either the point at position indexValue in spatialValue or null if spatialValue is not a line string.
Applies to
Entity Framework