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Wpf datagrid binding not updating

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Try running the example on your own machine and see how the three textboxes act completely different: The first value doesn't update before you click the button, the second value isn't updated until you leave the Text Box, while the third value updates automatically on each keystroke, text change etc.The Update Source Trigger property of a binding controls how and when a changed value is sent back to the source.Of course I blame it on the fact that I've spent too much time in the ASP.NET arena where I can force a data-rebinding by calling the Data Bind method of the object.

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For that reason, I have added a button next to the Text Box, which will update the source value on demand.Just make sure that you don't update the source value more often than you actually need to.If you want the full control, you can use the Explicit value and then do the updates manually, but this does take a bit of the fun out of working with data bindings.You need to replace the entire “Expense” object for you to see the collection change firing up.Microsoft is conducting an online survey to understand your opinion of the Msdn Web site.The first two has already been described, while the last one simply means that the update has to be pushed manually through to occur, using a call to Update Source on the Binding.