How to set the drop-down content for a VB combo box?

In VB, you can set the dropdown content of a ComboBox control by adjusting its Items property. There are multiple ways to set the dropdown content, including static and dynamic methods.

1. Static Setting:
   ComboBox’s Items property can be directly set during design or in the code. For example, during design, the desired dropdown items can be added in the Items property of the property window, with each dropdown item separated by a comma. In the code, the Add method can be used to add dropdown items one by one, as shown below:

ComboBox1.Items.Add("下拉项1")
ComboBox1.Items.Add("下拉项2")
ComboBox1.Items.Add("下拉项3")

1. Dynamic setting:
   You can dynamically set the dropdown content of a ComboBox at runtime as needed. For example, you can retrieve data from a database or generate dropdown content based on other conditions. Here is an example of dynamically setting the dropdown content of a ComboBox from a string array.

Dim items() As String = {"下拉项1", "下拉项2", "下拉项3"}
ComboBox1.Items.Clear()
ComboBox1.Items.AddRange(items)

The above are two commonly used methods for setting the drop-down content of a ComboBox. Choose the method that best suits your needs.