Concepts Layouts Interview Questions & FAQs

10. Concepts Layouts

10.1 When I try to add multiple controls to a button it shows an error, how do I add multiple controls to a button?

Most of UI Elements in WPF can contain only a single child element, therefore, when you add a control button, an error stating that the control has a child and only one child can be added to the control is generated. To overcome this error WPF allows the user to add layouts like StackPanel inside the control and add multiple controls inside a control.

The following code snippet will cause the error mentioned above.

10.2 How placing controls in a WrapPanel differs from a Grid?

Placing controls inside a WrapPanel will shrink the control to it's minimum width or it will wrap the controls to the next line when the form's size is reduced. But when the form's size is increased it will not resize the control accordingly, instead, it will place the controls next to each other. On the other hand, if the controls are placed inside a Grid, it will resize the controls when the form is resized.