读写的完整流程例子可参考:stream简单读写excel
写文件:
string demo="写入txt中";
StreamWriter demo_log = null;
demo_log = File.CreateText("demo_log.txt");
demo_log.WriteLine(demo,Encoding.GetEncoding("gb2312"));
demo_log.Close();
写后要释放，如果不释放会把这个文件锁住.：
demo_log.Dispose();
读是要有共享的方式读：
if (openFileDialog.ShowDialog() == DialogResult.OK)
{
string str = null;
FileStream fs = new FileStream(openFileDialog.FileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
StreamReader reader = new StreamReader(fs, System.Text.Encoding.Default);
while ((str = reader.ReadLine()) != null)
{
// split the string
//MessageBox.Show(str);
string[] strs = str.Split('|');
}
reader.Close();
}
读取图片的锁问题可以用克隆的方式解决:
// 通过生成clone的方式，使用clone来赋值，从而 FileSourcePath对应的图片得到解锁
//
System.Drawing.Image img = System.Drawing.Image.FromFile(FileSourcePath);
System.Drawing.Image bmp = new System.Drawing.Bitmap(img);
img.Dispose();
pictureBox1.Image = bmp; // System.Drawing.Image.FromFile(FileSourcePath);
pictureBox1.Visible = true;