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

.NET Framework (current version)

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("SqlServer", "DATEDIFF")]
static Nullable<int> DateDiff(
	String^ datePartArg,
	Nullable<TimeSpan> startDate,
	Nullable<DateTime> endDate


Type: System::String^

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

Type: System::Nullable<TimeSpan>

The first date.

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
Available since 4.0
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