初学者一个StreamWriter的问题哈,不知道该怎么写

Question

一个TEXTBOX 一个BUTTON  在TEXTBOX里输入信息后,点BUTTON后把TEXTBOX里的信息保存在
D盘下的123文件的123.TXT里, 如果没有123.TXT的话,自动创建在次输入信息的时候记录在123.TXT里的第二行代码该如何写?各位前辈帮帮忙吧
private void button1_Click(object sender, System.EventArgs e)
{
 StreamWriter sw =new StreamWriter();
                   ....................................
}

Answer 1

楼上的你就写吧- -!...我想知道如果是两个textbox的话 按button后
如何textbox1的信息写在TXT的第一行,textbox2的信息写在第二行一起等高人了!

Answer 2

string path = @"d:\123.txt";
System.IO.StreamWriter sw = null;
if(!System.IO.File.Exists(path))
sw = System.IO.File.CreateText(path);
else
sw = System.IO.File.AppendText(path);

sw.WriteLine(textBox1.Text);
sw.Close();

Answer 3

string paths = Directory.GetCurrentDirectory()+"\\ Bak.txt";   //获取文件路径 (我的是bak.txt)
streamreader myfile=new streamreader(paths,false,encoding.default);
myfile.writeline(textbox.txt);
myfile.close();

Answer 4

不好意思没看清搂主意思 
   paths = Directory.GetCurrentDirectory()+"\\ Bak.txt";     
            FileStream sour=new FileStream(paths ,FileMode .OpenOrCreate  ,FileAccess .ReadWrite );// 如果没有就创建
           StreamReader  Myfile= new StreamReader(sour ,false,Encoding .Default );
myfile.writeline(textbox.txt);
myfile.close();

Answer 5

writeline
就行了
给你一段参考一下
        private void SaveListBox(ListBox listBox,string defaultSaveName)
        {
            SaveFileDialog saveScanResult = new SaveFileDialog();
            saveScanResult.Filter = "txt|*.txt";
            saveScanResult.Title = "Save the List";
            saveScanResult.FileName = defaultSaveName;
            if (saveScanResult.ShowDialog() == DialogResult.OK)
            //saveScanResult.ShowDialog();
            {
                if (saveScanResult.FileName != "")
                {
                    using (StreamWriter sw = new StreamWriter(saveScanResult.FileName))
                    {
                        sw.WriteLine("The content of list is:");
                        sw.WriteLine("Save Date:");
                        sw.WriteLine(DateTime.Now);
                        sw.WriteLine("--------------------------");                        for (int i = 0; i < listBox.Items.Count; i++)
                        {
                            sw.WriteLine(listBox.Items[i].ToString());
                        }
                        sw.Close();
                        MessageBox.Show("The result has been saved!");
                    }                }
            }
        }存完结果是这个模样的
The content of list is:
Save Date:
2007-3-26 21:51:58
--------------------------
169.254.179.1::::::000000000000
169.254.179.2::::::000000000000
169.254.179.3::::::000000000000
169.254.179.4::::::000000000000
169.254.179.5::::::000000000000
169.254.179.6::::::000000000000