SpatialEdmFunctions.GeographyFromText Method

Definition

Namespace:

System.Data.Common.CommandTrees.ExpressionBuilder.Spatial

Assembly:

System.Data.Entity.dll

Creates a DbFunctionExpression that invokes the canonical 'GeographyFromText' function.

Overloads

GeographyFromText(DbExpression)	Creates a DbFunctionExpression that invokes the canonical 'GeographyFromText' function with the specified argument, which must have a string result type. The result type of the expression is Edm.Geography. Its value has the default coordinate system id (SRID) of the underlying provider.
GeographyFromText(DbExpression, DbExpression)	Creates a DbFunctionExpression that invokes the canonical 'GeographyFromText' function with the specified arguments. wellKnownText must have a string result type, while coordinateSystemId must have an integer numeric result type. The result type of the expression is Edm.Geography.

GeographyFromText(DbExpression)

Creates a DbFunctionExpression that invokes the canonical 'GeographyFromText' function with the specified argument, which must have a string result type. The result type of the expression is Edm.Geography. Its value has the default coordinate system id (SRID) of the underlying provider.

public:
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ GeographyFromText(System::Data::Common::CommandTrees::DbExpression ^ wellKnownText);

public static System.Data.Common.CommandTrees.DbFunctionExpression GeographyFromText (System.Data.Common.CommandTrees.DbExpression wellKnownText);

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

Public Function GeographyFromText (wellKnownText As DbExpression) As DbFunctionExpression

Parameters

wellKnownText

DbExpression

An expression that provides the well known text representation of the geography value.

Returns

DbFunctionExpression

A new DbFunctionExpression that returns a new geography value based on the specified value.

Exceptions

ArgumentNullException

wellKnownText

ArgumentException

wellKnownText

GeographyFromText(DbExpression, DbExpression)

Creates a DbFunctionExpression that invokes the canonical 'GeographyFromText' function with the specified arguments. wellKnownText must have a string result type, while coordinateSystemId must have an integer numeric result type. The result type of the expression is Edm.Geography.

public:
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ GeographyFromText(System::Data::Common::CommandTrees::DbExpression ^ wellKnownText, System::Data::Common::CommandTrees::DbExpression ^ coordinateSystemId);

public static System.Data.Common.CommandTrees.DbFunctionExpression GeographyFromText (System.Data.Common.CommandTrees.DbExpression wellKnownText, System.Data.Common.CommandTrees.DbExpression coordinateSystemId);

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

Public Function GeographyFromText (wellKnownText As DbExpression, coordinateSystemId As DbExpression) As DbFunctionExpression

Parameters

wellKnownText

DbExpression

An expression that provides the well known text representation of the geography value.

coordinateSystemId

DbExpression

An expression that provides the coordinate system id (SRID) of the geography value's coordinate system.

Returns

DbFunctionExpression

A new DbFunctionExpression that returns a new geography value based on the specified values.

Exceptions

ArgumentNullException

wellKnownText coordinateSystemId

ArgumentException

wellKnownText coordinateSystemId