C# 字符串多行显示、文本换行

方法1：以textbox为例

        ①：先设置textbox的属性Multiline为true

        ②：组织好显示字符串：FistLine(第一行要显示的字符)、SecondLine(第二行要显示的字符)、。。。。。。。、第n行字符

        ③：textbox.text="FistLine"+System.Environment.NewLine+"SecondLine"+System.Environment.NewLine+。。。。+"第N 行"+System.Environment.NewLine

   当你看到上面代码的时候可能会认为我们一般用的换行符不是"\r\n"吗

  你会想到这种方式：textbox.text="FistLine"+“\r\n”+"SecondLine"+"\r\n"+。。。。+"第N 行"+"\r\n"

 这种格式可能在运行时也不会出错，但在Linux操作系统或其他系统可能就会出错

 WinForm的 textbox截图效果：

Textbox例子1用（"\r\n"）：具体代码：

 /// <summary>
        ///  将结果填充到会员预定情况框
        /// </summary>
        /// <param name="dt"></param>
        private void BindGuestOrder(DataTable dt)
        {
            int intRowsCount;
            intRowsCount = dt.Rows.Count;
            string[] strName = new string[intRowsCount];
            string[] strPhone = new string[intRowsCount];
            string[] strRoom = new string[intRowsCount];
            string[] strNum = new string[intRowsCount];
            string[] strTime = new string[intRowsCount];
            for (int intRows = 0; intRows < intRowsCount; intRows++)
            {
                strName[intRows] = dt.Rows[intRows]["GuestName"].ToString();
                strPhone[intRows] = dt.Rows[intRows]["LinkPhone"].ToString();
                strRoom[intRows] = dt.Rows[intRows]["RoomName"].ToString();
                strNum[intRows] = dt.Rows[intRows]["BookNo"].ToString();
                strTime[intRows] = dt.Rows[intRows]["DineTime"].ToString();
                AddMsgToTextBox("客人姓名：" + strName[intRows]);
                AddMsgToTextBox("客人电话：" + strPhone[intRows]);
                AddMsgToTextBox("预定房间：" + strRoom[intRows]);
                AddMsgToTextBox("预约号：" + strNum[intRows]);
                AddMsgToTextBox("预定时间：" + strTime[intRows]);
            }
        }

private int intCounts = 1;
        /// <summary>
        /// 显示多行文本
        /// </summary>
        /// <param name="s"></param>
        public void AddMsgToTextBox(string s)
        {
            int intCount1;
            intCount1 = intCounts / 5;
            CheckTextBox(intCount1);
            txtVIPAdvanceOrder.Text += "\r\n" + s;
            if (intCounts % 5 == 0)
            {
                txtVIPAdvanceOrder.Text += "\r\n";
            }
            intCounts++;
        }

        /// <summary>
        /// 设置换行
        /// </summary>
        protected void CheckTextBox(int intCount1)
        {
            int iLines = 5 * (intCount1 + 2); //想显示多少行。

            string stxt = txtVIPAdvanceOrder.Text;
            string[] s = stxt.Split('\n');
            if (s.Length < iLines)
                return;
            txtVIPAdvanceOrder.Text = "";
            for (int i = 1; i < s.Length; i++)
            {
                txtVIPAdvanceOrder.Text += s[i] + "\r\n";
            }
            stxt = txtVIPAdvanceOrder.Text;
            if (stxt != "")
                txtVIPAdvanceOrder.Text = stxt.Substring(0, stxt.Length - 1);
        }

 例子2：截图效果(dev 控件（Memoedit）)：

源码：

 /// <summary>
        ///  将结果填充到会员预定情况框
        /// </summary>
        /// <param name="dt">预定会员的信息表</param>
        private void BindGuestOrder(DataTable vardt)
        {
            memGusetInfo.Text = "";
            int tmpRowsCount;
            tmpRowsCount = vardt.Rows.Count;
            string[] tmpstrName = new string[tmpRowsCount];
            string[] tmpstrPhone = new string[tmpRowsCount];
            string[] tmpstrRoom = new string[tmpRowsCount];
            string[] tmpstrNum = new string[tmpRowsCount];
            string[] tmpstrTime = new string[tmpRowsCount];
            for (int i = 0; i <  tmpRowsCount; i++)
            {
                tmpstrName[i] = vardt.Rows[i]["GuestName"].ToString();
                tmpstrPhone[i] = vardt.Rows[i]["LinkPhone"].ToString();
                tmpstrRoom[i] = vardt.Rows[i]["RoomName"].ToString();
                tmpstrNum[i] = vardt.Rows[i]["BookNo"].ToString();
                tmpstrTime[i] = vardt.Rows[i]["DineTime"].ToString();
                string tmpstr1 = "客人姓名：" + tmpstrName[i] + System.Environment.NewLine;
                string tmpstr2 = "客人电话：" + tmpstrPhone[i] + System.Environment.NewLine;
                string tmpstr3 = "预定房间：" + tmpstrRoom[i] + System.Environment.NewLine;
                string tmpstr4 = "预约号:" + tmpstrNum[i] + System.Environment.NewLine;
                string tmpstr5 = "预约时间:" + tmpstrTime[i] + System.Environment.NewLine;
                memGusetInfo.Text += string.Format("{0}{1}{2}{3}{4}", tmpstr1, tmpstr2, tmpstr3, tmpstr4, tmpstr5) + System.Environment.NewLine;
            }
        }

现在DEV控件比较多人用：所以弄了一个DEV的例子，DEV有专门的文本框控件（Memoedit）其实原理都一样，效果也差不多