15.WinForm練習--打開文件對話框

namespace _15.打開文件對話框
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void button1_Click(object sender, EventArgs e)
    {
        //點擊彈出對話框，新建對話框對象
        OpenFileDialog ofd = new OpenFileDialog();
        //設置對話框標題
        ofd.Title = "請選擇要打開的文件";
        //可以對文件進行多選
        ofd.Multiselect = true;
        //設置對話框初始目錄
        ofd.InitialDirectory = @"C:\Users\Administrator.USER-20180925HC\Desktop\pic";
        //設置對話框的文件類型
        ofd.Filter = "文本文件|*.txt|媒體文件|*.wav|圖片文件|*.jpg|所有文件|*.*";
        //展示對話框
        ofd.ShowDialog();

        //獲取打開對話框選中文件路徑
        string path = ofd.FileName;
        //如果沒有選擇文件則跳出
        if (path == "")
        {
            return;
        }
        //讀取文件流
        using(FileStream fsRead=new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))
        {
            byte[] buffer = new byte[1024 * 1024 * 5];
            //實際讀取的字節數
            int r = fsRead.Read(buffer, 0, buffer.Length);
            //解析buffer數組
            textBox1.Text=Encoding.Default.GetString(buffer, 0, r);
        }

    }
}

}