SqlMethods.DateDiffDay Method (Nullable<DateTimeOffset>, Nullable<DateTimeOffset>)


The .NET API Reference documentation has a new home. Visit the .NET API Browser on docs.microsoft.com to see the new experience.

Counts the number of day boundaries between two nullable dates.

Namespace:   System.Data.Linq.SqlClient
Assembly:  System.Data.Linq (in System.Data.Linq.dll)

public static Nullable<int> DateDiffDay(
	Nullable<DateTimeOffset> startDate,
	Nullable<DateTimeOffset> endDate


Type: System.Nullable<DateTimeOffset>

The start date for the time period.

Type: System.Nullable<DateTimeOffset>

The end date for the time period.

Return Value

Type: System.Nullable<Int32>

When both parameters are not null, returns the number of day boundaries between the two specified dates. When one or both parameters are null, returns a null value.

Corresponds to the SQL Server DATEDIFF function; using day to specify the type of time boundary crossed. For more about this SQL Server function, see DATEDIFF in the Microsoft SQL Server Books Online.

.NET Framework
Available since 3.5
Windows Phone Silverlight
Available since 7.1
Return to top