C# 字符串多行显示/文本换行以textbox为例讲解

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

③textbox.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