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SqlFunctions::DateDiff Method (String, Nullable<DateTime>, Nullable<DateTime>)

Returns the count of the specified datepart boundaries crossed between the specified start date and end date.

Namespace:  System.Data.Objects.SqlClient
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

[EdmFunctionAttribute(L"SqlServer", L"DATEDIFF")]
public:
static Nullable<int> DateDiff(
	String^ datePartArg, 
	Nullable<DateTime> startDate, 
	Nullable<DateTime> endDate
)

Parameters

datePartArg
Type: System::String

The part of the date to calculate the differing number of time intervals.

startDate
Type: System::Nullable<DateTime>

The first date.

endDate
Type: System::Nullable<DateTime>

The second date.

Return Value

Type: System::Nullable<Int32>
The number of time intervals between the two dates.

You cannot call this function directly. This function can only appear within a LINQ to Entities query.

This function is translated to a corresponding function in the database. For information about the corresponding SQL Server function, see DATEDIFF (Transact-SQL).

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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