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SpatialEdmFunctions.SpatialBuffer Method

.NET Framework 4.5

Creates a DbFunctionExpression that invokes the canonical 'SpatialBuffer' function with the specified arguments, which must have a Edm.Geography or Edm.Geometry and Edm.Double result types. 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 SpatialBuffer(
	this DbExpression spatialValue,
	DbExpression distance
)

Parameters

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

An expression that specifies the spatial value.

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

An expression that specifies the buffer distance.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression
A new DbFunctionExpression that returns a geometry value representing all points less than or equal to distance from spatialValue.

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).

ExceptionCondition
ArgumentNullException

spatialValuedistance

ArgumentException

spatialValuedistance

.NET Framework

Supported in: 4.6, 4.5
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