Displaying label at runtime

7 Jun 2005 6:43 PM

Richard

I have a Webform with a dropdownlist for selecting reports to process. When
the user click's a linkbutton to process the report, either a datagrid is
filled and made visible on the same form, or another form opens to show the
results. Either way, I want a status label to appear on the current form to
say "Processing report. Please wait" Unfortunately the label never appears
when I set lblStatus.Visible = True in the linkbutton's click event.

Short of async processing, how can I quickly display the label when a user
clicks a linkbutton?
    Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnSubmit.Click

        If ddlReports.SelectedItem.Value <> "-1" Then
            'Show the label...this never works.
            lblStatus.Visible = True
            Response.Redirect(ddlReports.SelectedItem.Value, False)
        Else
            ShowMessageBox(Me, "Please select a report from the list.")
        End If

    End Sub

7 Jun 2005 7:55 PM

Visar Gashi, MCP

That is not going to work because you're making a change on that page and
then telling it to redirect from it. When you redirect, no further processing
on that page will occur.

What you can do is on the destination page use some java script to display
the "loading..." text that will disappear when "onload" of the page completes
(this java script even fires when the whole page finishes loading).

Regards,
-Visar

Show quoteHide quote

"Richard" wrote:

> I have a Webform with a dropdownlist for selecting reports to process. When
> the user click's a linkbutton to process the report, either a datagrid is
> filled and made visible on the same form, or another form opens to show the
> results. Either way, I want a status label to appear on the current form to
> say "Processing report. Please wait" Unfortunately the label never appears
> when I set lblStatus.Visible = True in the linkbutton's click event.
>
> Short of async processing, how can I quickly display the label when a user
> clicks a linkbutton?
>     Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As
> System.EventArgs) Handles btnSubmit.Click
>
>         If ddlReports.SelectedItem.Value <> "-1" Then
>             'Show the label...this never works.
>             lblStatus.Visible = True
>             Response.Redirect(ddlReports.SelectedItem.Value, False)
>         Else
>             ShowMessageBox(Me, "Please select a report from the list.")
>         End If
>
>     End Sub

7 Jun 2005 8:05 PM

Richard

Thanks Visar. That won't work well with this scenario because the report
displays quickly on the destination page--it is the source page where there
is up to 10 second wait from the time the user clicks the button until the
destination page displays with the populated datagrid.

Show quoteHide quote

"Visar Gashi, MCP" wrote:

> That is not going to work because you're making a change on that page and
> then telling it to redirect from it. When you redirect, no further processing
> on that page will occur.
>
> What you can do is on the destination page use some java script to display
> the "loading..." text that will disappear when "onload" of the page completes
> (this java script even fires when the whole page finishes loading).
>
> Regards,
> -Visar
>
> "Richard" wrote:
>
> > I have a Webform with a dropdownlist for selecting reports to process. When
> > the user click's a linkbutton to process the report, either a datagrid is
> > filled and made visible on the same form, or another form opens to show the
> > results. Either way, I want a status label to appear on the current form to
> > say "Processing report. Please wait" Unfortunately the label never appears
> > when I set lblStatus.Visible = True in the linkbutton's click event.
> >
> > Short of async processing, how can I quickly display the label when a user
> > clicks a linkbutton?
> >     Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As
> > System.EventArgs) Handles btnSubmit.Click
> >
> >         If ddlReports.SelectedItem.Value <> "-1" Then
> >             'Show the label...this never works.
> >             lblStatus.Visible = True
> >             Response.Redirect(ddlReports.SelectedItem.Value, False)
> >         Else
> >             ShowMessageBox(Me, "Please select a report from the list.")
> >         End If
> >
> >     End Sub

8 Jun 2005 7:09 PM

Visar Gashi, MCP

You could, then, try an intermediate page with "Loading" information. For
example, you could create a page that only redirects and while it's
redirecting, it's showing a "Loading..." message.

The page would only have something like
<script>
window.navigation.url = "destination.aspx"
</script>
<body>
Loading...

(The code is super trimmed for illustration)

Regards,
-Visar

Show quoteHide quote

"Richard" wrote:

> Thanks Visar. That won't work well with this scenario because the report
> displays quickly on the destination page--it is the source page where there
> is up to 10 second wait from the time the user clicks the button until the
> destination page displays with the populated datagrid.
>
> "Visar Gashi, MCP" wrote:
>
> > That is not going to work because you're making a change on that page and
> > then telling it to redirect from it. When you redirect, no further processing
> > on that page will occur.
> >
> > What you can do is on the destination page use some java script to display
> > the "loading..." text that will disappear when "onload" of the page completes
> > (this java script even fires when the whole page finishes loading).
> >
> > Regards,
> > -Visar
> >
> > "Richard" wrote:
> >
> > > I have a Webform with a dropdownlist for selecting reports to process. When
> > > the user click's a linkbutton to process the report, either a datagrid is
> > > filled and made visible on the same form, or another form opens to show the
> > > results. Either way, I want a status label to appear on the current form to
> > > say "Processing report. Please wait" Unfortunately the label never appears
> > > when I set lblStatus.Visible = True in the linkbutton's click event.
> > >
> > > Short of async processing, how can I quickly display the label when a user
> > > clicks a linkbutton?
> > >     Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As
> > > System.EventArgs) Handles btnSubmit.Click
> > >
> > >         If ddlReports.SelectedItem.Value <> "-1" Then
> > >             'Show the label...this never works.
> > >             lblStatus.Visible = True
> > >             Response.Redirect(ddlReports.SelectedItem.Value, False)
> > >         Else
> > >             ShowMessageBox(Me, "Please select a report from the list.")
> > >         End If
> > >
> > >     End Sub