Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeography instance augmented with any Z (elevation) and M (measure) values carried by the instance.
命名空间： Microsoft.SqlServer.Types
程序集： Microsoft.SqlServer.Types（在 Microsoft.SqlServer.Types.dll 中）
语法
声明
<SqlMethodAttribute(IsDeterministic := True, IsPrecise := False)> _
Public Overrides Function ToString As String
用法
Dim instance As SqlGeography
Dim returnValue As String
returnValue = instance.ToString()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public override string ToString()
[SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)]
public:
virtual String^ ToString() override
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
abstract ToString : unit -> string
[<SqlMethodAttribute(IsDeterministic = true, IsPrecise = false)>]
override ToString : unit -> string
public override function ToString() : String
返回值
类型：System.String
A string containing the WKT representation of the calling SqlGeography instance.
注释
This method returns the string "Null" when called on nullnull 引用（在 Visual Basic 中为 Nothing） instances.