写入文件usinfg FileStream时是否可以显示进度/更新栏

Question

im working on a web application that reads files from some where and writes it down on the disk using System.IO.FileStream class. Is it possible to display some kind of progress bar or update bar while i write these files.

Here is sample code

using (Stream input = getResponse.GetResponseStream())
            {
                using (FileStream output = new FileStream(saveTo1, FileMode.OpenOrCreate))
                {
                    int bytesRead;

                    while ((bytesRead = input.Read(buffer, 0, buffer.Length))>0)
                    {
                        output.Write(buffer, 0, bytesRead);
                    }
                }
            }

Thanks in advance. :)

Answer 1

Try using Update Progress.

What you need to do?

• Place a button that writes the file stream when clicked into an Update Panel say "UPanelOperation".
• Place the following lines of code in the update panel before the closing Content Template tag.

• Please change the image name to whatever image you have in the following lines of code

   <asp:UpdateProgress ID="updateProgress" runat="server" DisplayAfter="0" AssociatedUpdatePanelID="UPanelOperation"> <ProgressTemplate> <div id="progressBackgroundFilter"> </div> <div align="center"> <img src="../../css/images/1-0.gif" />&nbsp;Please Wait...</div> </ProgressTemplate> </asp:UpdateProgress> 

Answer 2

Of course you can. Edit your code as follows:

while ((bytesRead = input.Read(buffer, 0, buffer.Length))>0)
                {
                    label1.Text = buffer.ToString() + " bytes transfered.";
                    output.Write(buffer, 0, bytesRead);
                }

...where label1 is a control you place on the form.