第1个回答 推荐于2016-06-18
private void button1_Click(object sender, System.EventArgs e)
{
string str = this.txtBoxMultiLine.Text.Trim();
if (str.Contains("\r\n"))
{
str = str.Replace("\r\n", "@");
string[] strArray = str.Split('@');
int sum = 0;
int i = 0;
foreach (string item in strArray)
{
if (int.TryParse(item, out i))
{
sum += i;
}
}
MessageBox.Show(sum.ToString());
}
else
{
MessageBox.Show("单行文本框值为:" + this.txtBoxMultiLine.Text);
}
}本回答被提问者采纳