SpatialEdmFunctions.GeographyCollectionFromText Metode

Definisi

Ruang nama:

System.Data.Common.CommandTrees.ExpressionBuilder.Spatial

Rakitan:

System.Data.Entity.dll

DbFunctionExpression Membuat yang memanggil fungsi 'GeographyCollectionFromText' kanonis dengan argumen yang ditentukan. geographyCollectionWellKnownText harus memiliki tipe hasil string, sementara coordinateSystemId harus memiliki tipe hasil numerik bilangan bulat. Jenis hasil ekspresi adalah Edm.Geography.

public:
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ GeographyCollectionFromText(System::Data::Common::CommandTrees::DbExpression ^ geographyCollectionWellKnownText, System::Data::Common::CommandTrees::DbExpression ^ coordinateSystemId);

public static System.Data.Common.CommandTrees.DbFunctionExpression GeographyCollectionFromText (System.Data.Common.CommandTrees.DbExpression geographyCollectionWellKnownText, System.Data.Common.CommandTrees.DbExpression coordinateSystemId);

static member GeographyCollectionFromText : System.Data.Common.CommandTrees.DbExpression * System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression

Public Function GeographyCollectionFromText (geographyCollectionWellKnownText As DbExpression, coordinateSystemId As DbExpression) As DbFunctionExpression

Parameter

geographyCollectionWellKnownText

DbExpression

Ekspresi yang menyediakan representasi teks terkenal dari nilai koleksi geografi.

coordinateSystemId

DbExpression

Ekspresi yang menyediakan id sistem koordinat (SRID) dari sistem koordinat nilai koleksi geografi.

Mengembalikan

DbFunctionExpression

DbFunctionExpression baru yang mengembalikan nilai koleksi geografi baru berdasarkan nilai yang ditentukan.

Pengecualian

ArgumentNullException

geographyCollectionWellKnownText coordinateSystemId

ArgumentException

geographyCollectionWellKnownText coordinateSystemId