SpatialEdmFunctions.GeographyPointFromText(DbExpression, DbExpression) 方法

定义

命名空间:
System.Data.Common.CommandTrees.ExpressionBuilder.Spatial
程序集:
System.Data.Entity.dll

创建一个 DbFunctionExpression 使用指定参数调用规范“GeographyPointFromText”函数的函数。

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

参数

pointWellKnownText
DbExpression

提供地理点值的已知文本表示形式的表达式。

coordinateSystemId
DbExpression

一个表达式，该表达式提供地理点值的坐标 systempointWellKnownTextValue 的坐标系 ID（SRID）。

返回

DbFunctionExpression

规范的“GeographyPointFromText”函数。

适用于