EntityFunctions.CreateTime 方法
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作为 LINQ to Entities 查询的一部分使用时，此方法调用规范 CreateTime EDM 函数以创建新的 TimeSpan 对象。
命名空间： System.Data.Entity.Core.Objects
程序集： EntityFramework（在 EntityFramework.dll 中）
语法
声明
<DbFunctionAttribute("Edm", "CreateTime")> _
<SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId := "hour")> _
<SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId := "second")> _
<SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId := "minute")> _
Public Shared Function CreateTime ( _
hour As Nullable(Of Integer), _
minute As Nullable(Of Integer), _
second As Nullable(Of Double) _
) As Nullable(Of TimeSpan)
用法
Dim hour As Nullable(Of Integer)
Dim minute As Nullable(Of Integer)
Dim second As Nullable(Of Double)
Dim returnValue As Nullable(Of TimeSpan)
returnValue = EntityFunctions.CreateTime(hour, _
minute, second)
[DbFunctionAttribute("Edm", "CreateTime")]
[SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "hour")]
[SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "second")]
[SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "minute")]
public static Nullable<TimeSpan> CreateTime(
Nullable<int> hour,
Nullable<int> minute,
Nullable<double> second
)
[DbFunctionAttribute(L"Edm", L"CreateTime")]
[SuppressMessageAttribute(L"Microsoft.Usage", L"CA1801:ReviewUnusedParameters", MessageId = L"hour")]
[SuppressMessageAttribute(L"Microsoft.Usage", L"CA1801:ReviewUnusedParameters", MessageId = L"second")]
[SuppressMessageAttribute(L"Microsoft.Usage", L"CA1801:ReviewUnusedParameters", MessageId = L"minute")]
public:
static Nullable<TimeSpan> CreateTime(
Nullable<int> hour,
Nullable<int> minute,
Nullable<double> second
)
[<DbFunctionAttribute("Edm", "CreateTime")>]
[<SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "hour")>]
[<SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "second")>]
[<SuppressMessageAttribute("Microsoft.Usage", "CA1801:ReviewUnusedParameters", MessageId = "minute")>]
static member CreateTime :
hour:Nullable<int> *
minute:Nullable<int> *
second:Nullable<float> -> Nullable<TimeSpan>
public static function CreateTime(
hour : Nullable<int>,
minute : Nullable<int>,
second : Nullable<double>
) : Nullable<TimeSpan>
参数
- hour
类型：System.Nullable<Int32>
小时。
- minute
类型：System.Nullable<Int32>
分钟。
- second
类型：System.Nullable<Double>
秒，根据需要可包括秒的分数部分。
返回值
类型：System.Nullable<TimeSpan>
新的时间跨度。
备注
无法直接调用此函数。 此函数只能出现在 LINQ to Entities 查询中。 此函数将被转换为数据库中对应的函数。