Creative Databinding With Delphi 8 for 'NET

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Creative DatabindingWith Delphi 8 for .NET
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Databinding Overview

• Simple Binding
• The binding of a control to a public property of
  a class
• Complex Binding
• The binding of a control to a class that supports
  a list
• Specifically the list object must support the
  IList interface.

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Databinding Binding Managers

• Currency Manager
• Simple and Complex Binding
• Uses Interfaces or reflection to bind
• Property Manager
• Simple Binding
• Uses reflection to bind

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Databinding

• Dataflow

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Sample Code
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Databinding Collections

• Must Implement IList
• Most convenient to inherit from CollectionBase
• Must implement a default Array property called
  Item
• Member class properties must be published

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Databinding Navigating the collection

• CurrencyManager
• Position, read and write, so can increment and
  decrement
• Current, contains the selected object
• Refresh, update the bound component.

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Databinding Showing changes

• The cheats way Currency Manager, refresh
• IBindingList
• Change Notification
• Automatic Addition of Items
• Automatic Removal of Items
• In place Editing
• Searching
• Sort

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Databinding Simple binding

• 2 way, but there is a trick to it
• Implement a propertynameChanged event
• Binding class allows us to provide custom parsing
  and formatting.

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Databinding Thanks to

• References
• http//www.codeproject.com/vb/net/databindingconce
  pts.asp
• http//support.microsoft.com/default.aspx?scidkb
  EN-USQ313482
• http//msdn.microsoft.com/library/default.asp?url
  /library/en-us/dnadvnet/html/vbnet02252003.asp