SpatialEdmFunctions.GeographyPolygonFromBinary(DbExpression, DbExpression) 方法

定义

创建使用指定参数调用规范“GeographyPolygonFromBinary”函数的 DbFunctionExpressionCreates a DbFunctionExpression that invokes the canonical 'GeographyPolygonFromBinary' function with the specified arguments. polygonWellKnownBinaryValue 的结果类型必须是二进制类型,而 coordinateSystemId 的必须是整数数值类型。polygonWellKnownBinaryValue must have a binary result type, while coordinateSystemId must have an integer numeric result type. 表达式的结果类型为 Edm.Geography。The result type of the expression is Edm.Geography.

public:
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ GeographyPolygonFromBinary(System::Data::Common::CommandTrees::DbExpression ^ polygonWellKnownBinaryValue, System::Data::Common::CommandTrees::DbExpression ^ coordinateSystemId);
public static System.Data.Common.CommandTrees.DbFunctionExpression GeographyPolygonFromBinary (System.Data.Common.CommandTrees.DbExpression polygonWellKnownBinaryValue, System.Data.Common.CommandTrees.DbExpression coordinateSystemId);
static member GeographyPolygonFromBinary : System.Data.Common.CommandTrees.DbExpression * System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression
Public Function GeographyPolygonFromBinary (polygonWellKnownBinaryValue As DbExpression, coordinateSystemId As DbExpression) As DbFunctionExpression

参数

polygonWellKnownBinaryValue
DbExpression

提供地理边值的知名二进制表示形式的表达式。An expression that provides the well known binary representation of the geography polygon value.

coordinateSystemId
DbExpression

提供地理边值的坐标系统的坐标系统 ID (SRID) 的表达式。An expression that provides the coordinate system id (SRID) of the geography polygon value's coordinate system.

返回

DbFunctionExpression

新 DbFunctionExpression 基于指定的值返回新的地理多边形值。A new DbFunctionExpression that returns a new geography polygon value based on the specified values.

例外

polygonWellKnownBinaryValue coordinateSystemId

polygonWellKnownBinaryValue coordinateSystemId

适用于