Week Number From Date

[venerable bede]

This is driving me towards lunacy

How can I get the week number from a datetime type ?

Any Ideas ?
There must be a nice simple, refined way to do this.

TIA

[wossname]

This is driving me towards lunacy

How can I get the week number from a datetime type ?

Any Ideas ?
There must be a nice simple, refined way to do this.

TIA

Imports System.Globalization
 
'...
 
Dim myCI As New CultureInfo("en-US")    'defines the calendar system.
Dim myCal As Calendar = myCI.Calendar
messagebox.show(myCal.GetWeekOfYear(Date.Today, CalendarWeekRule.FirstFullWeek, DayOfWeek.Monday))

Dolly Dimple

If I helped you rate me, if I didn't then don't

[venerable bede]

Thanks Wossy but I already tried that from the MSDN but I keep getting the error :

Calendar is ambiguous, imported from the namespaces or types, ' System.Globalization, System.UI.WebControls'

and before you say it, I have imported the Globalization namespace at the top of my page.

This doodles my dingo

[wossname]

OK, well fully qualify the class names then...

Dim myCI As New System.Globalization.CultureInfo("en-US")         'defines the calendar system.
        Dim myCal As System.Globalization.Calendar = myCI.Calendar
 
        messagebox.show(myCal.GetWeekOfYear(date.today, System.Globalization.CalendarWeekRule.FirstFullWeek, DayOfWeek.Monday))

Ambiguous names can be solved by fully qualifying the namespace explicitly.

[venerable bede]

Any Idea why you have to qualify the namespace explicitly ?
Strange.

Anyways, thnx wossy.
I'm glad I am carrying your baby.

[wossname]

Any Idea why you have to qualify the namespace explicitly ?
Strange.

Its not strange really its just that 2 namespaces (both of which you have imported in yout app) both have a class called Calendar. Its like someone saying "I'm flying to Aberdeen". The compiler thinks: "Which one? The one in Scotland or the one in America?" So you have to say it longhand: "I'm flying to Scotland.Aberdeen".

Its perfectly legal to have 2 classes with the same name as long as they are in different namespaces. This is also possible if one namespace CONTAINS the other namespace (nested). A long as you qualify it then there is no problem.

NOTE: If there is a name conflict and the namespace is really long then you can do this:

Imports Woss = System.Drawing.Drawing2D

The word "Woss" then becomes a shorthand way of writing that long namespace Cool eh?
Then use the 'alias' to make life easier...

Dim gr as Woss.Graphics
'this is equivalent to...
Dim gr as System.Drawing.Drawing2D.Graphics

PS, I can think of no better mother for my children. I hope its twins.