SpatialEdmFunctions.GeometryMultiPolygonFromText(DbExpression, DbExpression) 方法

定义

创建使用指定参数调用规范“GeometryMultiPolygonFromText”函数的 DbFunctionExpressionCreates a DbFunctionExpression that invokes the canonical 'GeometryMultiPolygonFromText' function with the specified arguments. multiPolygonWellKnownText 的结果类型必须是字符串类型,而 coordinateSystemId 的必须是整数数值类型。multiPolygonWellKnownText must have a string result type, while coordinateSystemId must have an integer numeric result type. 表达式的结果类型为 Edm.Geometry。The result type of the expression is Edm.Geometry.

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

参数

multiPolygonWellKnownText
DbExpression

提供几何图形多边值的知名文本表示形式的表达式。An expression that provides the well known text representation of the geometry multi-polygon value.

coordinateSystemId
DbExpression

提供几何图形多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 geometry multi-polygon value's coordinate system.

返回

DbFunctionExpression

新 DbFunctionExpression 基于指定的值返回新的几何多边形值。A new DbFunctionExpression that returns a new geometry multi-polygon value based on the specified values.

例外

multiPolygonWellKnownText coordinateSystemId

multiPolygonWellKnownText coordinateSystemId

适用于