摇奖程序如何去掉空行
在做一个摇奖程序，但是在从textbox输入时如果多按了一次回车键就会在listbox里多一行空行，请问如何去除空行？


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
int i,j;
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
j = 0;
}

private void button1_Click(object sender, EventArgs e)
{
string str = textBox1.Text.ToString();
string news = str.Replace( " ","" ); //去除全部空格
for (i = 0; i < listBox1.Items.Count;i++ )
{

if (news == listBox1.Items[i].ToString())
{
//if (textBox1.Text == " ")
//{ listBox1.Items.RemoveAt(i); }

listBox1.Items.RemoveAt(i);
}
}
//if (textBox1.Text == " ")
//{ textBox1.Text = ""; }
//else
//{
listBox1.Items.Add(news);
textBox1.Text = null;
i = listBox1.Items.Count;
//}

}

private void button2_Click(object sender, EventArgs e)
{
timer1.Enabled = true;
timer1.Interval = 100;
}

private void timer1_Tick(object sender, EventArgs e)
{
j++;
if (j < i)
{

label2.Text = listBox1.Items[j].ToString();

}

else
j = 0;

}

private void button3_Click(object sender, EventArgs e)
{
timer1.Enabled = false;
}

private void textBox1_KeyDown(object sender, KeyEventArgs e)
{
if(e.KeyCode==Keys.Enter)
{
string str = textBox1.Text.ToString();
string news = str.Replace(" ", "");
for (i = 0; i < listBox1.Items.Count; i++)
{

if (news == listBox1.Items[i].ToString())
{
listBox1.Items.RemoveAt(i);
}
}

listBox1.Items.Add(news);
textBox1.Text = null;
//i = listBox1.Items.Count;
}
}
}
}


[解决办法]
搞错了 应该是这样

string s = textBox1.Text.ToString();
string s1 = s.Replace("\r\n","");

[解决办法]
那再试试
string s1 = s.Replace("\n","");
或
string s1 = s.Replace("\r","");
------解决方案--------------------

C# code

string news = str.Trim( new char[] { '\r','\n'} )
[解决办法]
探讨

C# code
string news = str.Trim( new char[] { '\r','\n'} )