Cursory Definition
My first post on this blog was about how to loop over an ESRI cursor in Python with the for statement instead of the while statement. The same problem exists in .NET when using the various cursor objects like ICursor and IFeatureCursor. Normally you would code something like this :
Or this: Male fashion template.
Extension Methods. Android.Runtime.Register ('android/database/Cursor', ', 'Android.Database.ICursorInvoker', ApiSince=1) public interface ICursor: IDisposable, Java.IO.ICloseable. Type ICursor = interface interface ICloseable interface IJavaObject interface IDisposable. Cursor data is represented by the ICursor interface. This includes information about the cursor position. There are two types of identifiers by which you can access hand data.
And I want to replace it with the following.
The biggest problem was the Reset method because an ICursor doesn't have a reset method. I decided to set the cursor null and the recreated at the moment that MoveNext is called. This also makes sure the ICursor is only created when we really need it. Below you can find my full class. New sky go app android. ICursor Interface Provides access to members that hand out enumerated rows, field collections and allows for the updating, deleting and inserting of rows. AlarmClock; BlockedNumberContract; BlockedNumberContract.BlockedNumbers; Browser; CalendarContract; CalendarContract.Attendees; CalendarContract.CalendarAlerts.
To make a class usable in a foreach statement you need to implement the IEnumerable and IEnumerator interfaces. I found a good introduction to making class usable in a foreach statement in this Microsoft article. So what I did was creating a class that inherited from IEnumerator<IRow> and IEnumerable<IRow> and implement all the needed properties and methods. For IEnumerator these where Current, MoveNext, Reset and Dispose and for IEnumerable only the method GetEnumerator was needed. The biggest problem was the Reset method because an ICursor doesn't have a reset method. I decided to set the cursor null and the recreated at the moment that MoveNext is called. This also makes sure the ICursor is only created when we really need it. Below you can find my full class
Icursor Windows
As you can see I used the ESRI ComReleaser object to make sure that the ICursor references get released properly.
So now you know how to create a wrapper around the ICursor you can start creating other wrappers for often used cursors like the IFeatureCursor, IFields, .. and I can go to my bed. Success and feel free to post any comments or your implementation !!!
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