c sharp list box c sharp combo box

A ComboBox control is a combination of a TextBox and a ListBox control. Only one list item is displayed at one time in a ComboBox and other available items are loaded in a drop down list.

Creating a Combo Box:

We can create a ComboBox control using a Forms designer at design-time or using the ComboBox class in code at run-time.

To create a ComboBox control at design-time, you simply drag and drop a ComboBox control from Toolbox to a Form in Visual Studio. After you drag and drop a ComboBox on a Form, the ComboBox looks like Figure 1. Once a ComboBox is on the Form, you can move it around and resize it using mouse and set its properties and events. 

 

A list box is a GUI widget that allows the user to select one or more items from a list contained within a static, multiple line text box. The user clicks inside the box on an item to select it, sometimes in combination with the Shift key or Control key^[1] in order to make multiple selections. "Control-clicking" an item that has already been selected, unselects it.

Setting ComboBox Properties:

After you place a Combo Box control on a Form, the next step is to set properties.

The easiest way to set properties is from the Properties Window. You can open Properties window by pressing F4 or right click on a control and select Properties menu item. The Properties window looks like Figure 2. 

 

Using List box In your Project will let User to select a Value from give list which is whole visible to user.  Combobox is same but used for Design Purpose all other values will be hide on form will be visible when a user clicks on Combo box.