Random ranObj = new Random(); string word = ""; for (int i = 0; i < length; i++) { char ran = (char)ranObj.Next(97, 123); word += ran; } string input = txtInput.Text; // 取文本框的输入 if (input == word) MessageBox.Show("恭喜你中奖了!"); else MessageBox.Show("很遗憾,中奖号码是:" + word);