SpatialEdmFunctions.GeographyFromText Method (DbExpression, DbExpression)

.NET Framework (current version)
 

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.

Namespace:   System.Data.Common.CommandTrees.ExpressionBuilder.Spatial
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbFunctionExpression GeographyFromText(
	DbExpression wellKnownText,
	DbExpression coordinateSystemId
)

Parameters

wellKnownText
Type: System.Data.Common.CommandTrees.DbExpression

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

coordinateSystemId
Type: System.Data.Common.CommandTrees.DbExpression

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

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

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

Exception Condition
ArgumentNullException

wellKnownTextcoordinateSystemId

ArgumentException

wellKnownTextcoordinateSystemId

.NET Framework
Available since 4.5
Return to top
Show: