[FlagsAttribute] enum Colors_1
{
Red = 1, Green = 2, Blue = 4, Yellow = 8
}; //测试 private void button1_Click(object sender, EventArgs e) { Colors_1 color_1 = Colors_1.Red | Colors_1.Green | Colors_1.Blue
| Colors_1.Yellow; string strResult = color_1.ToString() + " " + ((int)color_1)
.ToString(); MessageBox.Show(strResult); }
再写个例子试试：
[FlagsAttribute] enum Colors_2 { Red = 1, Green = 2, Blue = 3, Yellow = 4 }; //测试 private void button1_Click(object sender, EventArgs e) { Colors_2 color_2 = Colors_2.Red | Colors_2.Green | Colors_2.Blue string strResult = color_2.ToString() + " " + ((int)color_2).ToString(); MessageBox.Show(strResult); }
晕，怎么没把颜色全部显示出来呀？
咦！3 + 4 = 7 刚好显示枚举值为3,4的两种颜色
再写一个例子呢?
//测试 private void button1_Click(object sender, EventArgs e) { Colors_1 c = (Colors_1)Enum.Parse(typeof(Colors_1), "7"); MessageBox.Show(c.ToString() + " " + ((int)c).ToString()); }输出结果：
居然会自动转换成相应的枚举值，厉害！
再来我加个枚举为7的值：
[FlagsAttribute] enum Colors_1 { Red = 1, Green = 2, Blue = 4, Yellow = 8, Seven = 7 }; //测试 private void button1_Click(object sender, EventArgs e) { Colors_1 c = (Colors_1)Enum.Parse(typeof(Colors_1), "7"); MessageBox.Show(c.ToString() + " " + ((int)c).ToString()); }
