分割字符串

private void button1_Click(object sender, EventArgs e)
{
string aaaa = "NACA-1-4-0008";
string[] indexlist = aaaa.Split('-');
}

private void button2_Click(object sender, EventArgs e)
{
string str = "aaajSbbbjscccJS";
string[] sArray = Regex.Split(str, "js", RegexOptions.IgnoreCase);

string str1 = "technology";
char[] separator = { 'o' };
string[] arr = str1.Split(separator);
}

private void button3_Click(object sender, EventArgs e)
{
string str = "aaajbbbscccjdddseee";
string[] sArray = str.Split(new char[2] { 'j', 's' });
}

string words = "1,2.3,,4";
private void button4_Click(object sender, EventArgs e)
{
string[] split = words.Split(new Char[] { ',', '.' }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split1 = words.Split(new Char[] { ',', '.' }, 3, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split2 = words.Split(new Char[] { ',', '.' }, 4, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split3 = words.Split(new Char[] { ',', '.' }, 5, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
string[] split4 = words.Split(new Char[] { ',', '.' }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
}

private void button5_Click(object sender, EventArgs e)
{
string[] split = words.Split(new string[] { ",", "." }, 2, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2.3,,4"} 不保留空元素
string[] split1 = words.Split(new string[] { ",", "." }, 6, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
}

private void button6_Click(object sender, EventArgs e)
{
string[] split = words.Split(new string[] { ",", "." }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
string[] split1 = words.Split(new string[] { ",", "." }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
}

private void button7_Click(object sender, EventArgs e)
{
string[] split = words.Split(new Char[] { ',', '.' }, StringSplitOptions.RemoveEmptyEntries);//返回:{"1","2","3","4"} 不保留空元素
string[] split1 = words.Split(new Char[] { ',', '.' }, StringSplitOptions.None);//返回:{"1","2","3","","4"} 保留空元素
}

//需要注意的是没有重载函数public string[] Split(string[] separator)，
//所以我们不能像VB.NET那样使用words.Split(",")，而只能使用words.Split(','）