标签：ble tostring memory fan dcl png contract cli serial
参考资料： http://blog.csdn.net/bitfan/article/details/4438458
所谓内存映射文件，其实就是在内存中开辟出一块存放数据的专用区域，这区域往往与硬盘上特定的文件相对应。进程将这块内存区域映射到自己的地址空间中，访问它就象是访问普通的内存一样。
在.NET中，使用MemoryMappedFile对象表示一个内存映射文件，通过它的CreateFromFile()方法根据磁盘现有文件创建内存映射文件，调用这一方法需要提供一个与磁盘现有文件相对应的FileStream对象。
需要保存的类：
[Serializable] public class MyImg { public Image img; public string name; }
MMF定义：
public class MMF { private MemoryMappedFile file = null; private MemoryMappedViewStream strem = null; private MemoryMappedViewAccessor acces = null; public MMF() { file = MemoryMappedFile.CreateOrOpen("myMMF", 1024 * 1024, MemoryMappedFileAccess.ReadWrite); strem = file.CreateViewStream(); acces = file.CreateViewAccessor(); } public void Write(int value) { acces.Write(0, value); } public int Read() { int value; acces.Read(0, out value); return value; } public void WriteClass(MyImg img) { IFormatter format = new BinaryFormatter(); format.Serialize(strem, img); } public MyImg ReadClass() { IFormatter format = new BinaryFormatter(); return format.Deserialize(strem) as MyImg; } }
界面代码：
private void button1_Click(object sender, EventArgs e) { using (OpenFileDialog dlg = new OpenFileDialog()) { dlg.Filter = "*.png|*.png"; if (dlg.ShowDialog() == DialogResult.OK) { this.pictureBox1.Image = Image.FromFile(dlg.FileName); this.label1.Text = Path.GetFileNameWithoutExtension(dlg.FileName); } } } private void button2_Click(object sender, EventArgs e) { MyImg img = new MyImg() { img = this.pictureBox1.Image, name = this.label1.Text }; myFile.WriteClass(img); } private void button3_Click(object sender, EventArgs e) { MyImg img = myFile.ReadClass(); this.pictureBox1.Image = img.img; this.label1.Text = img.name; } private void button4_Click(object sender, EventArgs e) { label2.Text = myFile.Read().ToString(); } private void button5_Click(object sender, EventArgs e) { myFile.Write(int.Parse(this.textBox1.Text)); }
参考资料： http://blog.csdn.net/bitfan/article/details/4438458
标签：ble tostring memory fan dcl png contract cli serial
原文地址：http://www.cnblogs.com/gujf2016/p/6229384.html
