c# - 在下拉列表控件中以编程方式设置默认文本

Question

如何在 DropDownListControl 中以编程方式设置默认文本？我是否必须使用默认文本定义 ValueField？

Answer 1

您可以通过多种方式以编程方式设置默认文本(即默认选定项):

1) dd.SelectedIndex = 0; // by using known index of a DropDownItem, where 0 is your index

2) dd.Items[0].Selected = true; // by setting Selected = true; on an item at a known index, where 0 is your index

3) dd.SelectedIndex = dd.Items.IndexOf(dd.Items.FindByText("my item")); // by using known Text value of a DropDownItem, where "my item" is the known text

假设您的 DropDownList 被命名为 dd