开发技巧2

1、ASCII码值转换为字母

 

private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                if (textBox1.Text == "")
                {
                    MessageBox.Show("ASCII码值不能为空", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    textBox1.Focus();
                }
                else
                {
                    byte[] array = new byte[1];
                    array[0] = (byte)(Convert.ToInt32(textBox1.Text.Trim()));
                    textBox2.Text = Convert.ToString(System.Text.Encoding.ASCII.GetString(array));
                }
            }
            catch
            {
                MessageBox.Show("请输入合法的ASCII码值", "信息", MessageBoxButtons.OK, MessageBoxIcon.Information);
                textBox1.Text = "";
                textBox1.Focus();
            }
        }

2去除字符串前后所有字符

 /// <summary>
        /// 去除字符串前后的所有空白字符
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static string trim(string s)
        {
            Regex regexToTrim = new Regex(@"(^\s*)|(\s*$)", RegexOptions.ECMAScript);    // C#: 匹配任何空白字符, 与 [ \f\n\r\t\v] 等效
            return regexToTrim.Replace(s, "");
        }