SpatialEdmFunctions.GeographyPolygonFromBinary 方法

定義

建立 DbFunctionExpression 一個,能呼叫典型的「GeographyPolygonFromBinary」函式,並附上指定的參數。 polygonWellKnownBinaryValue 必須有二元結果型別,而 coordinateSystemId 必須有整數數值結果型別。 該表達式的結果類型為 Edm.地理。

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

參數

polygonWellKnownBinaryValue
DbExpression

一個表達式,提供地理多邊形值的眾所周知的二進位表示。

coordinateSystemId
DbExpression

一個表達式,提供地理多邊形值的座標系 id(SRID)。

傳回

一個新的 DbFunctionExpression,根據指定的值回傳一個新的地理多邊形值。

例外狀況

polygonWellKnownBinaryValue coordinateSystemId

polygonWellKnownBinaryValue coordinateSystemId

適用於