Chapter 31

Question 1

What are 2 method to show hierarchical data using hierarchical data template

Answer 1

1. Tree view

2. Menu

Question 2

What is provided by XMLdataprovider

Answer 2

It provides us some facility which are useful for binding objects which are not designed for binding.

Question 3

What are 4 binding modes

Answer 3

1. OneWay
2. TwoWay
3. OneWayToSource
4. OneTime

Question 4

What is OneWay binding

Answer 4

Pick data from source and display on target. If source changes the display data changes.

Question 5

What is TwoWay binding

Answer 5

Pick data from source and display to target. If we make changes in data on target, it also reflect on original source.

Question 6

What is OneWayToSource binding

Answer 6

It is opposite to OneWay. If we type on target it goes on source.

Question 7

What is OneTime binding

Answer 7

We do binding and the data in source get display on target. But after that it is not bound. If there is changes in source it is not reflected on target.

Question 8

What is convert back function

Answer 8

When we do binding and take data from target to source

Question 9

What is convert function

Answer 9

When we do binding and take data from source to target

Question 10

What event attached on binding by default

Answer 10

By default on LostFocus, but there are also other options, like

• PropertyChanged
• Explicit

Question 11

What is validation in binding

Answer 11

These are simple classes that has validate method.

Question 12

What are 2 methods for validation in binding

Answer 12

It has

1. From binding
2. From source

Question 13

What is data context

Answer 13

We tell source once and bind elements to it