C++怎么读取txt中的空格和换行

ifstream infile("*.txt")//用来打开文件

string s//存储返回的字符串,即一行的内容

while(getline(infile,s))

{

cout<<s<<endl

}

就可以输出了.

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 *** 作系统或其他系统可能就会出错

WinForm的 textbox截图效果：

请点击输入图片描述

Textbox例子1用（"\r\n"）：具体代码：

复制代码代码如下:

/// <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 = 0intRows <intRowsCountintRows++)

{

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 = 1i <s.Lengthi++)

{

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）)：

请点击输入图片描述

源码：

复制代码代码如下:

/// <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 = 0i <tmpRowsCounti++)

{

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

}

}