我正在寻找一种在将文件从一个位置复制到另一个位置时更新进度条的方法。
我正在 a 中进行复制,BackgroundWorker
并在后台更新进度条。我尝试使用 file.length 来获取文件大小并使用它来计算百分比并以这种方式更新栏,但没有任何乐趣。
我附上代码,任何帮助将不胜感激,谢谢。
namespace Copier
{公共部分类Form1:Form {公共Form1(){InitializeComponent();}
// Declare for use in all methods
public string copyFrom;
public string copyTo;
private void btnCopyFrom_Click(object sender, EventArgs e)
{
// uses a openFileDialog, openFD, to chose the file to copy
copyFrom = "";
openFD.InitialDirectory = @"C:\Documents and Settings\user\My Documents";
openFD.FileName = "";
//openFD.ShowDialog();
if (openFD.ShowDialog() == DialogResult.Cancel)
{
MessageBox.Show("cancel button clicked");
}
else
{
// sets copyFrom = to the file chosen from the openFD
copyFrom = openFD.FileName;
// shows it in a textbox
txtCopyFrom.Text = copyFrom;
}
}
private void btnCopyTo_Click(object sender, EventArgs e)
{
//uses folderBrowserDialog, folderBD, to chose the folder to copy to
copyTo = "";
this.folderBD.RootFolder = System.Environment.SpecialFolder.MyComputer;
this.folderBD.ShowNewFolderButton = false;
//folderBD.ShowDialog();
//DialogResult result = this.folderBD.ShowDialog();
if (folderBD.ShowDialog() == DialogResult.Cancel)
{
MessageBox.Show("cancel button clicked");
}
else
{
// sets copyTo = to the folder chosen from folderBD
copyTo = this.folderBD.SelectedPath;
//shows it in a textbox.
txtCopyTo.Text = copyTo;
}
}
private void btnCopy_Click(object sender, EventArgs e)
{
copyBGW.RunWorkerAsync();
}
private void btnCancel_Click(object sender, EventArgs e)
{
Application.Exit();
}
//=================================================================
// BackGroundWorkers
//=================================================================
private void copyBGW_DoWork(object sender, DoWorkEventArgs e)
{
try
{
// copies file
string destinatationPath = Path.Combine(copyTo, Path.GetFileName(copyFrom));
File.Copy(copyFrom, destinatationPath);
MessageBox.Show("File Copied");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
或者有人可以告诉我一种方法来让进度条自己走,这样它就表明表格没有冻结?
已经清理了代码
感谢您到目前为止的输入