Adding a Server-Side Progress Indicator

This sample builds on the concepts taught in the "Getting Started" chapter, in the example, "A Simple Upload in ASP.NET". It assumes that you already understand how to configure your application and that you know how to perform at least a simple upload.

FileUp includes a server-side progress indicator that can be displayed to the user using HTML. The server-side progress indicator lets you know how much of the entire upload has arrived at the server. In an upload from the browser to an ASP.NET page, include the progress indicator in a separate page. In this page, you can get and display to the user:

You can use HTML techniques to customize the output effect, and display a counter or a progress bar.

           
Progress Indication in ASP.NET
Under ASP.NET, FileUp's progress indication is handled by the HttpModule. Therefore, to display accurate progress indication in ASP.NET, upload to a file with the .uplx extension.
Example

The complete code for the following example is available in the "Progress Indicator" sample included in the "FileUp/Samples/UploadSamples" installation directory. This sample contains the following pages:

Page Name Function
ProgressUpload.uplx Contains the display HTML for the form and will display the response. Also responsible for opening the progress indicator window.
ProgressUpload.uplx.[vb|cs] Code-behind of ProgressUpload.uplx: Contains the logic that will accept the request on the server, save out the files and coordinate progress indication.
ProgressIndicator.aspx Contains the display HTML for the progress indicator.
ProgressIndicator.aspx.[vb|cs] Code-behind for ProgressIndicator.aspx: Instantiates the FileUp Progress Indicator object and provides logic for progress indication display.

There are 5 steps to this process:

  1. Obtain a ProgressID on the Server before rendering the HTML for the upload form.
  2. Provide the HTML form as usual, but attach a script to start progress on the "onsubmit" event of the form.
  3. Provide a graphical representation of progress with HTML.
  4. Provide the logic to drive the progress display in the code-behind[ProgressIndicator.aspx.[vb|cs] of the Progress Indicator page.
  5. Set up ProgressUpload.uplx.[vb|cs] to synchronize with the progress indicator before parsing the request.
Step One: Obtain a ProgressID on the Server before rendering the HTML for the upload form.

A Progress ID must be obtained from the FileUp Progress Indicator object as the first step to an upload request that will provide progress indication. This Progress ID will be used to synchronize the progress indication display code and the FileUp upload processing code, even though they exist in separate pages, on separate threads. This progress ID must be obtained from the Progress Indicator object's NextProgressId() function. It should not be "set" as a value in any other way (do not provide your own values). The progress indicator provides an identifier to distinguish a particular upload's progress indication from any other progress indication occuring in other upload requests being handled by FileUp on the same webserver.

In the code behind of ProgressUpload.uplx, instantiate the FileUp Progress object on the Page_Load event.

C# protected void Page_Load(object sender, EventArgs e)
{
   //--- When the page is first loaded, generate a new progress id
   if (!Page.IsPostBack)
   {
      //--- FileUpProgress.NextProgressId generates a new progress id
      FileUpProgress progress = new FileUpProgress();
      progressid = progress.NextProgressId();
   }
}
VB.NET Protected Sub Page_Load(sender As Object, e As EventArgs)

   '--- When the page is first loaded, generate a new progress id
   If Not (Page.IsPostBack) Then
      '--- FileUpProgress.NextProgressId generates a new progress id
      Dim progress As New FileUpProgress()
      progressid = progress.NextProgressId()
   End If

End Sub
Step Two: Provide the HTML form as usual, but attach a script to start progress on the "onsubmit" event of the form.

This HTML form is identical to the form used in the Simple Upload in ASP.NET example, except that we will attach a function to the "onsubmit" event of the form. This function will open a new window for the progress indicator, passing it the Progress ID in the querystring. Likewise, the action attribute of the HTML form will be updated to include the Progress ID in its querystring.

The HTML Form (in ProgressUpload.uplx)
<html>
<head>
<title>SoftArtisans FileUp ASP.NET Progress Indicator Sample</title>

<script language="javascript">
/*
This small function makes sure that the progress indicator and server-side
processing page receive the new progress ID we just created in the CodeBehind class.
Also, it pops up the progress window.
*/
function startUpload()
{
   winStyle = "height=200,width=550,status=no,scrollbars=no,toolbar=no,"       "menubar=no,location=no";
   if(theForm.myFile.value != "")
      window.open("ProgressIndicator.aspx?progressid=<%=progressid%>", "_blank", winStyle);
   theForm.action = theForm.action + "?progressid=" + <%=progressid%>;
}
</script>
</head>
<body>
<form onSubmit="startUpload();" id="theForm" runat="server"
   enctype="multipart/form-data" method="post">
   Enter Filename: <input type="file" id="myFile" name="myFile" />
   Click "Browse" to select a file to upload
   <input runat="server" OnServerClick="UploadBtn_Click" id="UploadBtn"
      type="submit" value="Upload File" />
   <asp:literal id="ltrUploadResults" runat="server" />
</form>
</body>
</html>

Adding a Server-Side Progress Indicator

This sample builds on the concepts taught in the "Getting Started" chapter, in the example, "A Simple Upload in ASP.NET". It assumes that you already understand how to configure your application and that you know how to perform at least a simple upload.

FileUp includes a server-side progress indicator that can be displayed to the user using HTML. The server-side progress indicator lets you know how much of the entire upload has arrived at the server. In an upload from the browser to an ASP.NET page, include the progress indicator in a separate page. In this page, you can get and display to the user:

You can use HTML techniques to customize the output effect, and display a counter or a progress bar.

           
Progress Indication in ASP.NET
Under ASP.NET, FileUp's progress indication is handled by the HttpModule. Therefore, to display accurate progress indication in ASP.NET, upload to a file with the .uplx extension.
Example

The complete code for the following example is available in the "Progress Indicator" sample included in the "FileUp/Samples/UploadSamples" installation directory. This sample contains the following pages:

Page Name Function
ProgressUpload.uplx Contains the display HTML for the form and will display the response. Also responsible for opening the progress indicator window.
ProgressUpload.uplx.[vb|cs] Code-behind of ProgressUpload.uplx: Contains the logic that will accept the request on the server, save out the files and coordinate progress indication.
ProgressIndicator.aspx Contains the display HTML for the progress indicator.
ProgressIndicator.aspx.[vb|cs] Code-behind for ProgressIndicator.aspx: Instantiates the FileUp Progress Indicator object and provides logic for progress indication display.

There are 5 steps to this process:

  1. Obtain a ProgressID on the Server before rendering the HTML for the upload form.
  2. Provide the HTML form as usual, but attach a script to start progress on the "onsubmit" event of the form.
  3. Provide a graphical representation of progress with HTML.
  4. Provide the logic to drive the progress display in the code-behind[ProgressIndicator.aspx.[vb|cs] of the Progress Indicator page.
  5. Set up ProgressUpload.uplx.[vb|cs] to synchronize with the progress indicator before parsing the request.
Step One: Obtain a ProgressID on the Server before rendering the HTML for the upload form.

A Progress ID must be obtained from the FileUp Progress Indicator object as the first step to an upload request that will provide progress indication. This Progress ID will be used to synchronize the progress indication display code and the FileUp upload processing code, even though they exist in separate pages, on separate threads. This progress ID must be obtained from the Progress Indicator object's NextProgressId() function. It should not be "set" as a value in any other way (do not provide your own values). The progress indicator provides an identifier to distinguish a particular upload's progress indication from any other progress indication occuring in other upload requests being handled by FileUp on the same webserver.

In the code behind of ProgressUpload.uplx, instantiate the FileUp Progress object on the Page_Load event.

C# protected void Page_Load(object sender, EventArgs e)
{
   //--- When the page is first loaded, generate a new progress id
   if (!Page.IsPostBack)
   {
      //--- FileUpProgress.NextProgressId generates a new progress id
      FileUpProgress progress = new FileUpProgress();
      progressid = progress.NextProgressId();
   }
}
VB.NET Protected Sub Page_Load(sender As Object, e As EventArgs)

   '--- When the page is first loaded, generate a new progress id
   If Not (Page.IsPostBack) Then
      '--- FileUpProgress.NextProgressId generates a new progress id
      Dim progress As New FileUpProgress()
      progressid = progress.NextProgressId()
   End If

End Sub

Step Two: Provide the HTML form as usual, but attach a script to start progress on the "onsubmit" event of the form.

This HTML form is identical to the form used in the Simple Upload in ASP.NET example, except that we will attach a function to the "onsubmit" event of the form. This function will open a new window for the progress indicator, passing it the Progress ID in the querystring. Likewise, the action attribute of the HTML form will be updated to include the Progress ID in its querystring.

The HTML Form (in ProgressUpload.uplx)
<html>
<head>
<title>SoftArtisans FileUp ASP.NET Progress Indicator Sample</title>

<script language="javascript">
/*
This small function makes sure that the progress indicator and server-side
processing page receive the new progress ID we just created in the CodeBehind class.
Also, it pops up the progress window.
*/
function startUpload()
{
   winStyle = "height=200,width=550,status=no,scrollbars=no,toolbar=no," &
      "menubar=no,location=no";
   if(theForm.myFile.value != "")
      window.open("ProgressIndicator.aspx?progressid=<%=progressid%>", "_blank", winStyle);
   theForm.action = theForm.action + "?progressid=" + <%=progressid%>;
}
</script>
</head>
<body>
<form onSubmit="startUpload();" id="theForm" runat="server"
   enctype="multipart/form-data" method="post">
   Enter Filename: <input type="file" id="myFile" name="myFile" />
   Click "Browse" to select a file to upload
   <input runat="server" OnServerClick="UploadBtn_Click" id="UploadBtn"
      type="submit" value="Upload File" />
   <asp:literal id="ltrUploadResults" runat="server" />
</form>
</body>
</html>

Step Three: Provide a graphical representation of progress with HTML

The FileUp Progress Indicator does not provide it's own GUI. Instead, it provides information on progress indication so that you can develop your own custom represenatation of progress. In this sample, we are using an HTML table and an <hr> element to function as a progress meter.

ProgressIndicator.aspx
<html>
<body>
<h3>Upload Progress:</h3>
<!--
This table holds cells that are used to display
the upload progress for the progress indicator
-->
<asp:Table id="UploadTable"
   GridLines="Both"
   HorizontalAlign="Center"
   Font-Name="Verdana"
   Font-Size="8pt"
   CellPadding="15"
   CellSpacing="0"
   runat="server"<

   <asp:tablerow>
      <asp:tablecell><b>Progress ID</b></asp:tablecell>
      <asp:tablecell width="300"><b>Graphic</b></asp:tablecell>
      <asp:tablecell><b>Transferred Bytes</b></asp:tablecell>
      <asp:tablecell><b>Total Bytes</b></asp:tablecell>
      <asp:tablecell><b>Percentage</b></asp:tablecell>
   </asp:tablerow>
   <asp:tablerow>
      <asp:tablecell runat="server" id="cellProgressID" text="0" />
      <asp:tablecell runat="server" id="cellGraphic">
         <HR align="left" style="color:blue" size="10" width="<%=strPercent%>" />
      </asp:tablecell>
      <asp:tablecell runat="server" id="cellTransferredBytes" />
      <asp:tablecell runat="server" id="cellTotalBytes" />
      <asp:tablecell runat="server" id="cellPercentage" />
   </asp:tablerow>
</asp:table>
</body>
</html>

Step Four: Provide the logic to drive the progress display in the code-behind ProgressIndicator.aspx.[vb|cs] of the Progress Indicator page.

Here you will instantiate the FileUp Progress Indicator object and retrieve the ProgressID from the querystring. Once the ID has been assigned to the Progress Indicator object, the Percentage property is checked. The page will continue to refresh, updating the display graphics until it reaches 100%.

C#
public class ProgressIndicator : System.Web.UI.Page
{
   //--- Declare a string and controls used on the webform
   //--- to display the upload progress
   protected string strPercent = String.Empty;
   protected System.Web.UI.WebControls.TableCell cellProgressID;
   protected System.Web.UI.WebControls.TableCell cellTransferredBytes;
   protected System.Web.UI.WebControls.TableCell cellTotalBytes;
   protected System.Web.UI.WebControls.TableCell cellPercentage;

   protected void Page_Load()
   {
      //--- Each time the page is loaded, update the upload progress
      UpdateProgress();
   }

   private void UpdateProgress()
   {
      //--- Delare an object for the FileUp progress object
      FileUpProgress progress = null;

      try
      {
         //--- Instantiate the FileUpProgress object
         progress = new FileUpProgress();

         //--- Get the Progress ID from the query string
         int intProgressId = Convert.ToInt32(Request.QueryString["progressid"]);

         //--- Important: Assign the progress ID to the object to monitor
         //--- the upload
         progress.ProgressId = intProgressId;

         //--- If the upload isn't complete, continue to refresh the page
         //--- to display the progress
         if(progress.Percentage < 100)
            Page.Response.Write("<meta http-equiv=\"Refresh\" content="1" />");

         //--- Update the progress table below with the current information
         cellProgressID.Text = progress.ProgressId.ToString();
         strPercent = progress.Percentage.ToString("N") + "%";
         cellTransferredBytes.Text = progress.TransferredBytes.ToString();
         cellTotalBytes.Text = progress.TotalBytes.ToString();
         cellPercentage.Text = progress.Percentage.ToString("N");
      }
      catch (Exception ex)
      {
         cellProgressID.Text = "<b>An exception has occurred</b><br>" +
            ex.Message;
      }
      finally
      {
         //--- Always call Dispose in the finally block
         if (progress != null)
      {
         progress.Dispose();
         progress = null;
      }
   }
}
VB.NET
Public Class ProgressIndicator : Inherits System.Web.UI.Page

   '--- Declare a string and controls used on the webform
   '--- to display the upload progress
   Protected strPercent As String = String.Empty
   Protected cellProgressID As System.Web.UI.WebControls.TableCell
   Protected cellTransferredBytes As System.Web.UI.WebControls.TableCell
   Protected cellTotalBytes As System.Web.UI.WebControls.TableCell
   Protected cellPercentage As System.Web.UI.WebControls.TableCell

   Protected Sub Page_Load(sender As Object, e As EventArgs)
      '--- Each time the page is loaded, update the upload progress
      UpdateProgress()
   End Sub

   Private Sub UpdateProgress()

      Dim progress As FileUpProgress
      Try

         '--- Instantiate the FileUpProgress object
         progress = New FileUpProgress()

         '--- Get the Progress ID from the query string
         Dim intProgressId As Integer
         intProgressId = Convert.ToInt32(Request.QueryString("progressid"))

         '--- Important: Assign the progress ID to the object to monitor
         '--- the upload
         progress.ProgressId = intProgressId

         '--- If the upload isn't complete, continue to refresh the page
         '--- to display the progress
         If progress.Percentage < 100 Then
            Page.Response.Write("<meta http-equiv=""Refresh"" content="1" />")
         End If

         '--- Update the progress table below with the current information
         cellProgressID.Text = progress.ProgressId.ToString()
         strPercent = progress.Percentage.ToString("N") + "%"
         cellTransferredBytes.Text = progress.TransferredBytes.ToString()
         cellTotalBytes.Text = progress.TotalBytes.ToString()
         cellPercentage.Text = progress.Percentage.ToString("N")
      Catch ex As System.Exception
         cellProgressID.Text = "<b>An exception has occurred</b><br>" + _
            ex.Message
      Finally
         If Not (progress Is Nothing) Then
            progress.Dispose()
            progress = Nothing
         End If
       End Try
   End Sub

End Class

Top

Copyright © 2010 SoftArtisans, Inc. All rights reserved.

Step Three: Provide a graphical representation of progress with HTML

The FileUp Progress Indicator does not provide it's own GUI. Instead, it provides information on progress indication so that you can develop your own custom represenatation of progress. In this sample, we are using an HTML table and an <hr> element to function as a progress meter.

ProgressIndicator.aspx
<html>
<body>
<h3>Upload Progress:</h3>
<!--
This table holds cells that are used to display
the upload progress for the progress indicator
-->
<asp:Table id="UploadTable"
   GridLines="Both"
   HorizontalAlign="Center"
   Font-Name="Verdana"
   Font-Size="8pt"
   CellPadding="15"
   CellSpacing="0"
   runat="server"<

   <asp:tablerow>
      <asp:tablecell><b>Progress ID</b></asp:tablecell>
      <asp:tablecell width="300"><b>Graphic</b></asp:tablecell>
      <asp:tablecell><b>Transferred Bytes</b></asp:tablecell>
      <asp:tablecell><b>Total Bytes</b></asp:tablecell>
      <asp:tablecell><b>Percentage</b></asp:tablecell>
   </asp:tablerow>
   <asp:tablerow>
      <asp:tablecell runat="server" id="cellProgressID" text="0" />
      <asp:tablecell runat="server" id="cellGraphic">
         <HR align="left" style="color:blue" size="10" width="<%=strPercent%>" />
      </asp:tablecell>
      <asp:tablecell runat="server" id="cellTransferredBytes" />
      <asp:tablecell runat="server" id="cellTotalBytes" />
      <asp:tablecell runat="server" id="cellPercentage" />
   </asp:tablerow>
</asp:table>
</body>
</html>

Step Four: Provide the logic to drive the progress display in the code-behind ProgressIndicator.aspx.[vb|cs] of the Progress Indicator page.

Here you will instantiate the FileUp Progress Indicator object and retrieve the ProgressID from the querystring. Once the ID has been assigned to the Progress Indicator object, the Percentage property is checked. The page will continue to refresh, updating the display graphics until it reaches 100%.

C#
public class ProgressIndicator : System.Web.UI.Page
{
   //--- Declare a string and controls used on the webform
   //--- to display the upload progress
   protected string strPercent = String.Empty;
   protected System.Web.UI.WebControls.TableCell cellProgressID;
   protected System.Web.UI.WebControls.TableCell cellTransferredBytes;
   protected System.Web.UI.WebControls.TableCell cellTotalBytes;
   protected System.Web.UI.WebControls.TableCell cellPercentage;

   protected void Page_Load()
   {
      //--- Each time the page is loaded, update the upload progress
      UpdateProgress();
   }

   private void UpdateProgress()
   {
      //--- Delare an object for the FileUp progress object
      FileUpProgress progress = null;

      try
      {
         //--- Instantiate the FileUpProgress object
         progress = new FileUpProgress();

         //--- Get the Progress ID from the query string
         int intProgressId = Convert.ToInt32(Request.QueryString["progressid"]);

         //--- Important: Assign the progress ID to the object to monitor
         //--- the upload
         progress.ProgressId = intProgressId;

         //--- If the upload isn't complete, continue to refresh the page
         //--- to display the progress
         if(progress.Percentage < 100)
            Page.Response.Write("<meta http-equiv=\"Refresh\" content="1" />");

         //--- Update the progress table below with the current information
         cellProgressID.Text = progress.ProgressId.ToString();
         strPercent = progress.Percentage.ToString("N") + "%";
         cellTransferredBytes.Text = progress.TransferredBytes.ToString();
         cellTotalBytes.Text = progress.TotalBytes.ToString();
         cellPercentage.Text = progress.Percentage.ToString("N");
      }
      catch (Exception ex)
      {
         cellProgressID.Text = "<b>An exception has occurred</b><br>" +
            ex.Message;
      }
      finally
      {
         //--- Always call Dispose in the finally block
         if (progress != null)
      {
         progress.Dispose();
         progress = null;
      }
   }
}
VB.NET
Public Class ProgressIndicator : Inherits System.Web.UI.Page

   '--- Declare a string and controls used on the webform
   '--- to display the upload progress
   Protected strPercent As String = String.Empty
   Protected cellProgressID As System.Web.UI.WebControls.TableCell
   Protected cellTransferredBytes As System.Web.UI.WebControls.TableCell
   Protected cellTotalBytes As System.Web.UI.WebControls.TableCell
   Protected cellPercentage As System.Web.UI.WebControls.TableCell

   Protected Sub Page_Load(sender As Object, e As EventArgs)
      '--- Each time the page is loaded, update the upload progress
      UpdateProgress()
   End Sub

   Private Sub UpdateProgress()

      Dim progress As FileUpProgress
      Try

         '--- Instantiate the FileUpProgress object
         progress = New FileUpProgress()

         '--- Get the Progress ID from the query string
         Dim intProgressId As Integer
         intProgressId = Convert.ToInt32(Request.QueryString("progressid"))

         '--- Important: Assign the progress ID to the object to monitor
         '--- the upload
         progress.ProgressId = intProgressId

         '--- If the upload isn't complete, continue to refresh the page
         '--- to display the progress
         If progress.Percentage < 100 Then
            Page.Response.Write("<meta http-equiv=""Refresh"" content="1" />")
         End If

         '--- Update the progress table below with the current information
         cellProgressID.Text = progress.ProgressId.ToString()
         strPercent = progress.Percentage.ToString("N") + "%"
         cellTransferredBytes.Text = progress.TransferredBytes.ToString()
         cellTotalBytes.Text = progress.TotalBytes.ToString()
         cellPercentage.Text = progress.Percentage.ToString("N")
      Catch ex As System.Exception
         cellProgressID.Text = "<b>An exception has occurred</b><br>" + _
            ex.Message
      Finally
         If Not (progress Is Nothing) Then
            progress.Dispose()
            progress = Nothing
         End If
       End Try
   End Sub

End Class
Step Five: Set up ProgressUpload.uplx.[vb|cs] to synchronize with the progress indicator before parsing the request.

The upload request processing code must first be preceeded by code that synchronizes progress indication by instantiating the Progress Indicator object and passing it the ProgressID for this upload. After this synchronization, the rest of the upload processing code is written as usual.

C#
protected void UploadBtn_Click(object sender, EventArgs e)
{
   //--- Hide the form after the upload button is clicked
   theForm.Visible = false;
   ProcessUpload();
}

//--- Process the upload request
private void ProcessUpload()
{
   //--- Declare an object for FileUp
   FileUp fileUpload = null;

   //--- Decalre an object for the file
   SaFile file = null;

   try
   {
      //--- Instantiate the FileUp object
      fileUpload = new FileUp(Context);

      //--- Get the progress id from the querystring
      int intProgressID = Convert.ToInt32(Request.QueryString["progressid"]);
      fileUpload.ProgressID = intProgressID;

      //--- This StringBuilder will be used to display the results of the upload
      System.Text.StringBuilder results = new System.Text.StringBuilder();

      fileUpload.Path = "C:\\Temp"

      //--- Check to be sure there was a file selected in the form
      //--- If so, continue processing

      //--- Get a reference to the uploaded file field
      file = (SaFile)fileUpload.Form["myFile"];

      if (file != null)
      {
         if (!file.IsEmpty)
         {

            file.Save();

            //--- Display information about the saved file
            results.Append("<h3>FileUp Saved the File Successfully</h3>");
            //--- More results code can be placed here (see full sample)

         }
         else
         {
            //--- If SaFile.IsEmpty is true, the file field was left empty
            results.Append("There was no file submitted in the form field.");
         }
      }
      else
      {
         results.Append("The referenced field does not exist or is not " &
            "of type=\"file\"");
      }

      //--- Display the results on the webform
      ltrUploadResults.Text = results.ToString();
   }
   catch (Exception ex)
   {
      //--- If an exception is caught, display the results
      ltrUploadResults.Text = "<b>An error has occurred:</b><br />" +
         ex.Message;
   }
   finally
   {
      //--- Always call Dispose in the finally block
      if (fileUpload != null)
   {
      fileUpload.Dispose();
      fileUpload = null;
   }
}
VB.NET
Protected Sub UploadBtn_Click(sender As Object, e As EventArgs)

   '--- Hide the form after the upload button is clicked
   theForm.Visible = False
   ProcessUpload()

End Sub

'--- Process the upload request
Private Sub ProcessUpload()

   '--- Declare an object for FileUp
   Dim fileUpload As FileUp

   '--- Declare an object for the file
   Dim file As SaFile

   Try

      '--- Instantiate the FileUp object
      fileUpload = New FileUp(Context)

      '--- Get the progress id from the querystring
      Dim intProgressID As Integer = _
         Convert.ToInt32(Request.QueryString("progressid"))
      fileUpload.ProgressID = intProgressID

      '--- This StringBuilder will be used to display the results of the upload
      Dim results As New System.Text.StringBuilder()

      fileUpload.Path = "C:\temp"

      '--- Check to be sure there was a file selected in the form
      '--- If so, continue processing

      '--- Get a reference to the uploaded file field
      file = CType(fileUpload.Form("myFile"), SaFile)

      If Not (file Is Nothing) Then
         If Not (file.IsEmpty) Then

            file.Save()

            '--- Display information about the saved file
            results.Append("<h3>FileUp Saved the File Successfully</h3>")
            '---- More results code can be placed here (see full sample code)

         Else
            '--- If SaFile.IsEmpty is true, the file field was left empty
            results.Append("There was no file submitted in the form field.")
         End If
      Else
         results.Append("The referenced field does not exist or is not " + _
            "of type=""file""")
      End If

      '--- Display the results on the webform
      ltrUploadResults.Text = results.ToString()

   Catch ex As System.Exception
      '--- If an exception is caught, display the results
      ltrUploadResults.Text = "<b>An error has occurred:</b><br />" + _
         ex.Message
   Finally
      '--- Always call FileUp.Dispose in the finally block
      If Not (fileUpload Is Nothing) Then
         fileUpload.Dispose()
         fileUpload = Nothing
      End If
   End Try

End Sub

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