SpatialEdmFunctions.SpatialBuffer Method
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.DbFunctionExpressionA 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).| Exception | Condition |
|---|---|
| ArgumentNullException | spatialValuedistance |
| ArgumentException | spatialValuedistance |
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.
