Must leave the page and return to get the page to update

[Cal Who]

I have a data bound aspataList such that if a file exist the aspataList
shows some data from the file.

If there is no file it lists nothing.


I also have a button to upload a file.

When the button is clicked the file is uploaded but the aspataList is not
refreshed.

I assume the data bound controls are run before the button event is.

Is there some way I can cause the aspataList to reload it's data?



Failing that.

I added a refresh button in which onclick contains: window.location...

In web.config I have
<caching>

<outputCache enableOutputCache="false"

enableFragmentCache="false"

sendCacheControlHeader="false"

omitVaryStar="false" />

</caching



I believe when the button is clicked it refreshes the page (becaue I see
flicker) but the aspataList does not update.

If in FF I use "Clear recent history" to clear the cache and then click the
refresh button the aspataList still does not update.



If I leave the page and returnto it, it updates nicely.


I don't know what to try next.

Can you suggest something?


Thanks

 

[Alexey Smirnov]

I have a data bound aspataList such that if a file exist the aspataList
shows some data from the file.

If there is no file it lists nothing.

I also have a button to upload a file.

When the button is clicked the file is uploaded but the aspataList  is not
refreshed.

I assume the data bound controls are run before the button event is.

Is there some way I can cause the aspataList to reload it's data?

Failing that.

I added a refresh button in which onclick contains: window.location...

In web.config I have
<caching>

<outputCache enableOutputCache="false"

enableFragmentCache="false"

sendCacheControlHeader="false"

omitVaryStar="false" />

</caching

I believe when the button is clicked it refreshes the page (becaue I see
flicker) but the  aspataList  does not update.

If in FF I use "Clear recent history" to clear the cache and then click the
refresh button the aspataList still does not update.

If I leave the page and returnto it, it updates nicely.

I don't know what to try next.

Can you suggest something?

Thanks

I think you simply need to bind your list again after the file has
been uploaded

Sub ButtonUpload_Click(sender As Object, e As EventArgs)

FileUpload()
BindDatalist()

End Sub

 

[Cal Who]

I think you simply need to bind your list again after the file has
been uploaded

Sub ButtonUpload_Click(sender As Object, e As EventArgs)

FileUpload()
BindDatalist()

End Sub

I think you're right

I think I just thought that binding simply pointed to the source.
Now it seems to that it cause the source to be read.


Thanks a lot

 

[Alexey Smirnov]

I think you're right

I think I just thought that binding simply pointed to the source.
Now it seems to that it cause the source to be read.

Thanks a lot

I think the problem is that you bind the list in Page_Load and then
the "ButtonUpload_Click" fired. If yes, you may change Page_Load like

If Not Page.IsPostBack Then
BindDatalist()
End If

So that it will not happen twice during postback

Hope this helps

 

[Cal Who]

I think the problem is that you bind the list in Page_Load and then
the "ButtonUpload_Click" fired. If yes, you may change Page_Load like

If Not Page.IsPostBack Then
BindDatalist()
End If

So that it will not happen twice during postback

Hope this helps

<aspataList runat="server" .snip. DataSourceID="ObjectDataSourcePng">

<ItemTemplate>

<%# Container.DataItem %>

</ItemTemplate>

</aspataList>

and

<asp:ObjectDataSource ID="ObjectDataSourcePng" runat="server"
TypeName="PhotoManager"
SelectMethod="ListImportPngDirectory"></asp:ObjectDataSource>

and
ListImportPngDirectory returns an array of FileSystemInfo.

I never actually bind. I guess the DataList does that. Right?

Is the DataList iterating the FileSystemInfos Array?

Or the DataSource?
So how is the FileSystemInfos converted to string.

By the DataSource or the Datalist?

Very confusing.

Anyway, your fix made it work,



Thanks again

 

[Alexey Smirnov]

<aspataList runat="server" .snip. DataSourceID="ObjectDataSourcePng">

<ItemTemplate>

<%# Container.DataItem %>

</ItemTemplate>

</aspataList>

and

<asp:ObjectDataSource ID="ObjectDataSourcePng" runat="server"
TypeName="PhotoManager"
SelectMethod="ListImportPngDirectory"></asp:ObjectDataSource>

and
ListImportPngDirectory returns an array of  FileSystemInfo.

I never actually bind. I guess the DataList does that. Right?

Is the DataList iterating the FileSystemInfos Array?

Or the DataSource?
So how is the FileSystemInfos converted to string.

By  the DataSource or the Datalist?

Very confusing.

Anyway, your fix made it work,

Thanks again- Hide quoted text -

- Show quoted text -

ok, I see,

You probably should add

ObjectDataSourcePng.Update();

to the method where you upload the file

 

[Cal Who]

ok, I see,

You probably should add

ObjectDataSourcePng.Update();

to the method where you upload the file

But then I would have to know what to do to cause the display to be updated.

I could just call an update routine and do the Bind in there.

Is there some reason why that would be better?


Binding in that upload method like you first suggested appears to work find.

I'm assuming that binding is much like assigning a value to a variable.

That is, the previous bind effects are erased and replaced by the new stuff.
Right?


Thanks