用C#搞一个窗体的，能读写TXT文件的，多谢了

用C#搞一个窗体的，能读写TXT文件的，谢谢了
用C#搞一个窗体的，能读写TXT文件的，谢谢了，越快越好

[解决办法]
form添加openFileDialog，添加按钮点击事件如下： 
private void button1_Click(object sender, EventArgs e)
{
//获取曲线数据文件
this.openFileDialog1.Filter = "Txt文件(*.txt)|*.txt";//设置只能打开TXT文件
this.openFileDialog1.Title = "导入TXT";
DialogResult result = this.openFileDialog1.ShowDialog();
if (result == DialogResult.OK)
{
string file_name = this.openFileDialog1.FileName;//保存文件路径
if (file_name != "")
{
this.filePathTe.Text = file_name;

}

}
}
[解决办法]
读：

C# code

            openFile.ShowDialog();            strFileName = openFile.FileName;            if (strFileName == "") return;            //读取txt文件              StreamReader sr = new StreamReader(strFileName,System.Text.Encoding.Default);            string strText = sr.ReadToEnd();            sr.Close();            sr.Dispose();            textBox1=strText ;
[解决办法]

C# code
public class TextForm : Form{    TextBox _edit;    string _filename;    bool _dirty;    public TextForm()    {        _edit = new TextBox();        _edit.Dock = DockStyle.Fill;        _edit.TextChanged = (sender, e) => { _dirty = true; };        this.Controls.Add(_edit);    }    protected override void OnLoad(EventArgs e)    {        base.OnLoad(e);        OpenFileDialog dlg = new OpenFileDialog();        dlg.Filter = "文本文件|*.txt";        if (dlg.ShowDialog() == DialogResult.OK)        {            _filename = dlg.FileName;            _edit.Text = System.IO.File.ReadAllText(_filename);            _dirty = false;        }    }    protected override void OnFormClosing(FormClosingEventArgs e)    {        if (!e.Cancel && _dirty)        {            DialogResult dr = MessageBox.Show("文件已更改，是否保存？", "确认",                MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question);            if (dr == DialogResult.Yes)            {                if (_filename == null)                {                    SaveFileDialog dlg = new SaveFileDialog();                    dlg.Filter = "文本文件|*.txt";                    if (dlg.ShowDialog() == DialogResult.OK)                        _filename = dlg.FileName;                }                if (_filename != null)                {                    System.IO.File.WriteAllText(_filename, _edit.Text);                }            }            else if (dr == DialogResult.Cancel)                e.Cancel = true;        }    }}