C#-WinForm-公共控件的基本属性及练习

private void button2_Click(object sender, EventArgs e)
{
string end = "";
int count = 0;
foreach(object o in checkedListBox1.CheckedItems)
{
if (count > 0)
end += ",";
end += o.ToString();
count++;
}
MessageBox.Show(end);
}

private void button1_Click(object sender, EventArgs e)
{
List<Nation> list = new NationData().Select();
comboBox1.DataSource= list;//获取或设置数据源
comboBox1.DisplayMember = "NationName";//获取或设置要显示的属性
}

private void button2_Click_1(object sender, EventArgs e)
{
Nation n = comboBox1.SelectedItem as Nation;
MessageBox.Show(n.NationName);
}

private void button1_Click(object sender, EventArgs e)
{
List<Nation> list = new NationData().Select();
comboBox1.DataSource= list;//获取或设置数据源
comboBox1.DisplayMember = "NationName";//获取或设置要显示的属性
comboBox1.SelectedIndex = list.Count - 1;
}