public const int DBT_DEVICEREMOVECOMPLETE = 0x8004; //一个设备或媒体片已被删除。
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_DEVICECHANGE)
{
switch (m.WParam.ToInt32())
{
case DBT_DEVICEARRIVAL: //U盘插入
if (UisShow)
{
DriveInfo[] uin = DriveInfo.GetDrives();
foreach (DriveInfo drive in uin)
{
if (drive.DriveType == DriveType.Removable)
{
int i;
for (i = 0; i < Us.Count; i++)
{
if (Us[i].tag.Equals(drive.Name.ToString())) //找到盘符
{
break;
}
}
if (i == Us.Count) //显示U盘悬浮窗
{
Form12 U = new Form12();
U.tag = drive.Name.ToString();
U.location = new System.Drawing.Point(Screen.PrimaryScreen.Bounds.Width - 300, top);
top += 93;
//U.isOpen = false;
U.U_name = drive.Name.ToString() + " " + drive.VolumeLabel + "\n(" + Math.Round(drive.AvailableFreeSpace / 1098907648.0, 2) + "G)可用";
Us.Add(U);
U.Show();
}
//break;
}
}
}
break;
case DBT_DEVICEREMOVECOMPLETE: //U盘卸载
if (UisShow)
{
top -= 93;
if (Us.Count == 1)
{
Us[0].Dispose();
}
else if (Us.Count >= 2)
{
//找出拔出的U盘并释放
int i, j;
for (i = 0; i < Us.Count; i++)
{
DriveInfo[] s = DriveInfo.GetDrives();
for (j = 0; j < s.Length; j++)
{
if (s[j].DriveType == DriveType.Removable)
{
if (Us[i].tag.Equals(s[j].Name.ToString()))
{
break;
}
}
}
if (j == s.Length) //表明没有找到对应盘符 Us[i]
{
Us[i].Close(); //释放Us[i]
Us[i].Dispose();
Us.Remove(Us[i]);
}
}
}
}
//new Form3("U盘已拔出").ShowDialog();
//label1.Text = "请插入认证U盘";
bool bo = true;
DriveInfo[] uin1 = DriveInfo.GetDrives();
//if (uin1.Equals(null))
//bo = true;
foreach (DriveInfo drive in uin1)
{
if (pf.Equals(drive.Name.ToString()))
{
bo = false;
}
// break;
}
if (f2 != null && !f2.IsDisposed)
{
bo = false;
}
if (bo)
{
//Form1.Us
this.Hide();
f2 = new Form2();
f2.Show();
//f1 = new Form1();
//f1.Show();
}
break;
default:
break;
}
}
base.WndProc(ref m);
}