桌面端的移动运算(三)

Moving Files on a Device
也许你会遇到需要在设备上移动或者重命名一个文件的情况。例如，你也许想在拷贝一个新版本的文件到设备上之前先为配置文件做一个备份。该功能的演示界面如图2。
Figure 2. The Move File tab of the RAPI demo program
OpenNETCF.Desktop.Communication命名空间RAPI类提供了MoveDeviceFile方法用于移动或重命名一个文件。作为CopyFile方法，这个方法将源文件作为第一个参数，将目的文件作为第二个参数。
BtnMovePerform按钮的点击事件过程演示了MoveDeviceFile方法。
[VC#.NET]
private void btnMovePerform_Click(object sender, System.EventArgs e)
{
// Perform the move.
try
{
if ((txtMoveSource.Text == "") || (txtMoveDestination.Text == ""))
{
MessageBox.Show("You must provide both a source and destination
file.",
"Missing File Information");
}
else
{
myrapi.MoveDeviceFile(txtMoveSource.Text, txtMoveDestination.Text);
MessageBox.Show("Your file has been copied.","Copy Success");
}
}

// Handle any errors that might occur.
catch (Exception ex)
{
MessageBox.Show("The following error occurred moving the file " +
ex.Message,"Connection Error");
}

}
[VB.NET]
Private Sub btnMovePerform_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btnMovePerform.Click

' Perform the move.
Try
If (txtMoveSource.Text = "") Or (txtMoveDestination.Text = "") Then