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SpatialEdmFunctions.ExteriorRing Method

.NET Framework 4.5

Creates a DbFunctionExpression that invokes the canonical 'ExteriorRing' function with the specified argument, which must have an Edm.Geometry result type. The result type of the expression is Edm.Geometry.

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

public static DbFunctionExpression ExteriorRing(
	this DbExpression geometryValue


Type: System.Data.Common.CommandTrees.DbExpression

The geometry value.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression
A new DbFunctionExpression that returns either the exterior ring of the polygon geometryValue or null if geometryValue is not a polygon.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type DbExpression. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).





.NET Framework

Supported in: 4.5

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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