GeographyOperationsExtensions.Distance 方法

确定地理距离。

命名空间:  System.Spatial
程序集:  System.Spatial(在 System.Spatial.dll 中)

语法

声明
<ExtensionAttribute> _
Public Shared Function Distance ( _
    operand1 As Geography, _
    operand2 As Geography _
) As Nullable(Of Double)
用法
Dim operand1 As Geography
Dim operand2 As Geography
Dim returnValue As Nullable(Of Double)

returnValue = operand1.Distance(operand2)
public static Nullable<double> Distance(
    this Geography operand1,
    Geography operand2
)
[ExtensionAttribute]
public:
static Nullable<double> Distance(
    Geography^ operand1, 
    Geography^ operand2
)
static member Distance : 
        operand1:Geography * 
        operand2:Geography -> Nullable<float> 
public static function Distance(
    operand1 : Geography, 
    operand2 : Geography
) : Nullable<double>

参数

返回值

类型:System.Nullable<Double>
操作结果。

用法说明

在 Visual Basic 和 C# 中,您可以对 Geography 类型的任何对象将此方法作为实例方法调用。在您使用实例方法语法调用此方法时,将忽略第一个参数。有关详细信息,请参阅https://msdn.microsoft.com/zh-cn/library/bb384936(v=vs.103)https://msdn.microsoft.com/zh-cn/library/bb383977(v=vs.103)

请参阅

参考

GeographyOperationsExtensions 类

System.Spatial 命名空间