private void button1_Click(object sender, EventArgs e){    OpenFileDialog openFileDialog1 = new OpenFileDialog();    openFileDialog1.Title = "C# Corner Open File Dialog";    openFileDialog1.InitialDirectory = @"c:\";    openFileDialog1.Filter = "All files（*.*）|*.*|All files(*.*)|*.* ";    /*     * FilterIndex 属性用于选择了何种文件类型,缺省设置为0,系统取Filter属性设置第一项     * ,相当于FilterIndex 属性设置为1.如果你编了3个文件类型，当FilterIndex ＝2时是指第2个.     */    openFileDialog1.FilterIndex = 2;    /*     *如果值为false，那么下一次选择文件的初始目录是上一次你选择的那个目录，     *不固定；如果值为true，每次打开这个对话框初始目录不随你的选择而改变，是固定的       */    openFileDialog1.RestoreDirectory = true;    if (openFileDialog1.ShowDialog() == DialogResult.OK)    {        textBox1.Text = System.IO.Path.GetFileNameWithoutExtension(openFileDialog1.FileName);        //System.IO.Path.GetFullPath(openFileDialog1.FileName); //绝对路径        //System.IO.Path.GetExtension(openFileDialog1.FileName); //文件扩展名        //System.IO.Path.GetFileNameWithoutExtension(openFileDialog1.FileName); //文件名没有扩展名        //System.IO.Path.GetFileName(openFileDialog1.FileName); //得到文件        //System.IO.Path.GetDirectoryName(openFileDialog1.FileName); //得到路径    }}