如何使用下拉菜单创建用户控件组合框

Question

I am learning about creating user controls, although I've been programming c# for many years. What I am trying to achieve is a multi-column combobox with auto-complete that 1: allows more than 1 character when searching and 2: displays all columns when auto-completing. I have found nothing like it out there.

I am intending to implement it using a TextBox, a button for opening the dropdown, and a panel control that contains a lightweight datagrid.

I can get the TextBox & Button to display fine, and the button event fires as well. What I cannot figure out is how to create & display the panel control. I've tried adding the panel to the user control using this.Controls.Add(panel) and also tried adding it to the parent form.

Sorry if this is a simple question or I'm missing something obvious. I have gone through the MS walkthrough and another tutorial but they don't demonstrate how to make a dropdown panel appear dynamically.

THANKS in advance for any advice or pointers!

Answer 1

除了使用常规按钮之外，还可以使用ToggleButton，然后在切换按钮时使用其状态显示弹出窗口。