StackOverflowException: System.IO?

If I am not wrong, System.IO is one of the seven namespaces that get
imported in all ASP.NET page automatically but in the following code:

<%@dotnet.itags.org. Import Namespace="System.IO" %>
<script runat="server">
Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")

lblOutput.Text = "Name: " & ioFileInfo.Name & "<br>"
lblOutput.Text += "Path: " & ioFileInfo.DirectoryName & "<br>"
lblOutput.Text += Last Accessed: " & ioFileInfo.LastAccessTime
& "<br>"
lblOutput.Text += Last Written: " & ioFileInfo.LastWriteTime &
"<br>"
lblOutput.Text += Size: " & ioFileInfo.Length & " bytes"
End Sub
</script>
<form runat="server">
<asp:Label ID="lblOutput" runat="server">
</form>

if I get rid of the <%@dotnet.itags.org. Import....%line, then ASP.NET generates the
following error:

Type 'FileInfo' is not defined.

pointing to the very first line within the Page_Load sub (Dim
ioFileInfo As New FileInfo...).

Why?

Please correct me if I am wrong.

Thanks,

Arpanre:

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces
that get imported in all ASP.NET page automatically

You are wrong.

If you wish to use System.IO, you must import it explicitly.

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces that get
imported in all ASP.NET page automatically but in the following code:
>
<%@. Import Namespace="System.IO" %>
<script runat="server">
Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")
>
lblOutput.Text = "Name: " & ioFileInfo.Name & "<br>"
lblOutput.Text += "Path: " & ioFileInfo.DirectoryName & "<br>"
lblOutput.Text += Last Accessed: " & ioFileInfo.LastAccessTime
& "<br>"
lblOutput.Text += Last Written: " & ioFileInfo.LastWriteTime &
"<br>"
lblOutput.Text += Size: " & ioFileInfo.Length & " bytes"
End Sub
</script>
<form runat="server">
<asp:Label ID="lblOutput" runat="server">
</form>
>
if I get rid of the <%@. Import....%line, then ASP.NET generates the
following error:
>
Type 'FileInfo' is not defined.
>
pointing to the very first line within the Page_Load sub (Dim
ioFileInfo As New FileInfo...).
>
Why?
>
Please correct me if I am wrong.
>
Thanks,
>
Arpan
>

System
System.Collections
System.Web
System.Web.UI
System.Web.UI.HtmlControls
System.Web.UI.WebControls

I hope the above 6 namespaces "do" get imported automatically by all
ASP.NET pages. If not, then please let me know. God knows what all I
must have learnt wrong from that ASP.NET book!

BTW, are there any additional namespaces apart from the above 6 that
all ASP.NET pages import automatically?

Thanks once again,

Regards,

Arpan

Juan T. Llibre wrote:

Quote:

Originally Posted by

re:

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces
that get imported in all ASP.NET page automatically

>
You are wrong.
>
If you wish to use System.IO, you must import it explicitly.
>
>
>
>
Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espaol : http://asp.net.do/foros/
===================================
"Arpan" <arpan_de@.hotmail.comwrote in message
news:1156708999.220650.277560@.m79g2000cwm.googlegr oups.com...

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces that get
imported in all ASP.NET page automatically but in the following code:

<%@. Import Namespace="System.IO" %>
<script runat="server">
Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")

if I get rid of the <%@. Import....%line, then ASP.NET generates the
following error:

Type 'FileInfo' is not defined.

pointing to the very first line within the Page_Load sub (Dim
ioFileInfo As New FileInfo...).

Why?

Please correct me if I am wrong.

Thanks,

Arpan

Arpan,
If you do not see it in the using .. list (or "Import" in VB.NET) when you
create a class or web page, then you need to explicitly add it an ensure that
the project has a reference to the namespace assembly. If it isn't there, you
will find out about it very quickly!
Peter

--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com
"Arpan" wrote:

Quote:

Originally Posted by

Thanks Juan for pointing out my mistake. Actually the ASP.NET book I am
referring to learn ASP.NET states that System.IO is one of the seven
namespaces that get imported automatically by all ASP.NET pages - the
remaining 6 being
>
System
System.Collections
System.Web
System.Web.UI
System.Web.UI.HtmlControls
System.Web.UI.WebControls
>
I hope the above 6 namespaces "do" get imported automatically by all
ASP.NET pages. If not, then please let me know. God knows what all I
must have learnt wrong from that ASP.NET book!
>
BTW, are there any additional namespaces apart from the above 6 that
all ASP.NET pages import automatically?
>
Thanks once again,
>
Regards,
>
Arpan
>
>
Juan T. Llibre wrote:

Quote:

Originally Posted by

re:

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces
that get imported in all ASP.NET page automatically

You are wrong.

If you wish to use System.IO, you must import it explicitly.

Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espa?ol : http://asp.net.do/foros/
===================================
"Arpan" <arpan_de@.hotmail.comwrote in message
news:1156708999.220650.277560@.m79g2000cwm.googlegr oups.com...

Quote:

Originally Posted by

>
>

In ASP.NET 2.0, you can control which namespaces are
imported automatically by configuring them in web.config.

Any namespace you define in web.config will be automatically imported,
and you will not have to import it specifically.

See :
http://msdn2.microsoft.com/en-us/li...collection.aspx
and
http://msdn2.microsoft.com/en-us/li...gessection.aspx
re:

Quote:

Originally Posted by

I hope the above 6 namespaces "do" get imported automatically by all ASP.NET pages.
If not, then please let me know.
BTW, are there any additional namespaces apart from the above 6 that
all ASP.NET pages import automatically?

In ASP.NET 2.0, the default namespaces are defined in the default web.config, located in :
Drive:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\ CONFIG

Here they are :

You could add System.IO, so it's automatically imported, by adding :

to the <namespacessection of web.config.

Of course, any other namespace you want to import automatically can also be added.

Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espaol : http://asp.net.do/foros/
===================================
"Arpan" <arpan_de@.hotmail.comwrote in message
news:1156710516.410124.90070@.m79g2000cwm.googlegro ups.com...
Thanks Juan for pointing out my mistake. Actually the ASP.NET book I am
referring to learn ASP.NET states that System.IO is one of the seven
namespaces that get imported automatically by all ASP.NET pages - the
remaining 6 being

System
System.Collections
System.Web
System.Web.UI
System.Web.UI.HtmlControls
System.Web.UI.WebControls

I hope the above 6 namespaces "do" get imported automatically by all
ASP.NET pages. If not, then please let me know. God knows what all I
must have learnt wrong from that ASP.NET book!

BTW, are there any additional namespaces apart from the above 6 that
all ASP.NET pages import automatically?

Thanks once again,

Regards,

Arpan

Juan T. Llibre wrote:

Quote:

Originally Posted by

re:

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces
that get imported in all ASP.NET page automatically

Quote:

Originally Posted by

If I am not wrong, System.IO is one of the seven namespaces that get
imported in all ASP.NET page automatically but in the following code:

<%@. Import Namespace="System.IO" %>
<script runat="server">
Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")

if I get rid of the <%@. Import....%line, then ASP.NET generates the
following error:

Type 'FileInfo' is not defined.

pointing to the very first line within the Page_Load sub (Dim
ioFileInfo As New FileInfo...).

Why?

Please correct me if I am wrong.

Thanks,

Arpan

"Arpan" <arpan_de@.hotmail.comwrote in message
news:1156708999.220650.277560@.m79g2000cwm.googlegr oups.com...

Quote:

Originally Posted by

Please correct me if I am wrong.

You are wrong.
Thanks all of you for your helpful inputs.

Regards,

Arpan

Mark Rae wrote:

Quote:

Originally Posted by

"Arpan" <arpan_de@.hotmail.comwrote in message
news:1156708999.220650.277560@.m79g2000cwm.googlegr oups.com...
>

Quote:

Originally Posted by

Please correct me if I am wrong.

>
You are wrong.

Juan T. Llibre wrote:

Quote:

Originally Posted by

re:

Quote:

Originally Posted by

>If I am not wrong, System.IO is one of the seven namespaces
>that get imported in all ASP.NET page automatically

Quote:

Originally Posted by

>If I am not wrong, System.IO is one of the seven namespaces that get
>imported in all ASP.NET page automatically but in the following code:
>>
><%@. Import Namespace="System.IO" %>
><script runat="server">
> Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
> Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")
>>
> lblOutput.Text = "Name: " & ioFileInfo.Name & "<br>"
> lblOutput.Text += "Path: " & ioFileInfo.DirectoryName & "<br>"
> lblOutput.Text += Last Accessed: " & ioFileInfo.LastAccessTime
>& "<br>"
> lblOutput.Text += Last Written: " & ioFileInfo.LastWriteTime &
>"<br>"
> lblOutput.Text += Size: " & ioFileInfo.Length & " bytes"
> End Sub
></script>
><form runat="server">
><asp:Label ID="lblOutput" runat="server">
></form>
>>
>if I get rid of the <%@. Import....%line, then ASP.NET generates the
>following error:
>>
>Type 'FileInfo' is not defined.
>>
>pointing to the very first line within the Page_Load sub (Dim
>ioFileInfo As New FileInfo...).
>>
>Why?
>>
>Please correct me if I am wrong.
>>
>Thanks,
>>
>Arpan
>>

>
>

Look in <framework dir>\v2.0.50727\CONFIG\web.config.comments under the
compilation section to see the default imports (there are nine).

For 1.1 look in <framework dir>\v1.1.4322\CONFIG\machine.config. There
are eight listed there. The new one in 2.0 is System.Configuration.

Kevin Jones
re:

Quote:

Originally Posted by

Look in <framework dir>\v2.0.50727\CONFIG\web.config.comments under the compilation section to see
the default imports (there are nine).

Kevin,

don't you consider mscorlib to be one of them ?

Also, doesn't the vbc compiler automatically import Microsoft.VisualBasic ?

Also, isn't the list supplied in the default web.config's pages element accurate ?

Won't any namespace defined in web.config be automatically imported,
and you will not have to import it specifically ?

See :
http://msdn2.microsoft.com/en-us/li...collection.aspx
and
http://msdn2.microsoft.com/en-us/li...gessection.aspx
Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espaol : http://asp.net.do/foros/
===================================
"Kevin Jones" <kjonesNOSPAM@.develop.comwrote in message
news:O6w44soyGHA.1252@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

Juan T. Llibre wrote:

Quote:

Originally Posted by

>re:

Quote:

Originally Posted by

>>If I am not wrong, System.IO is one of the seven namespaces
>>that get imported in all ASP.NET page automatically

>>
>You are wrong.
>>
>If you wish to use System.IO, you must import it explicitly.
>>
>>
>>
>>
>Juan T. Llibre, asp.net MVP
>aspnetfaq.com : http://www.aspnetfaq.com/
>asp.net faq : http://asp.net.do/faq/
>foros de asp.net, en espaol : http://asp.net.do/foros/
>===================================
>"Arpan" <arpan_de@.hotmail.comwrote in message
>news:1156708999.220650.277560@.m79g2000cwm.googlegr oups.com...

Quote:

Originally Posted by

>>If I am not wrong, System.IO is one of the seven namespaces that get
>>imported in all ASP.NET page automatically but in the following code:
>>>
>><%@. Import Namespace="System.IO" %>
>><script runat="server">
>> Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
>> Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")
>>>
>> lblOutput.Text = "Name: " & ioFileInfo.Name & "<br>"
>> lblOutput.Text += "Path: " & ioFileInfo.DirectoryName & "<br>"
>> lblOutput.Text += Last Accessed: " & ioFileInfo.LastAccessTime
>>& "<br>"
>> lblOutput.Text += Last Written: " & ioFileInfo.LastWriteTime &
>>"<br>"
>> lblOutput.Text += Size: " & ioFileInfo.Length & " bytes"
>> End Sub
>></script>
>><form runat="server">
>><asp:Label ID="lblOutput" runat="server">
>></form>
>>>
>>if I get rid of the <%@. Import....%line, then ASP.NET generates the
>>following error:
>>>
>>Type 'FileInfo' is not defined.
>>>
>>pointing to the very first line within the Page_Load sub (Dim
>>ioFileInfo As New FileInfo...).
>>>
>>Why?
>>>
>>Please correct me if I am wrong.
>>>
>>Thanks,
>>>
>>Arpan
>>>

>>
>>

Look in <framework dir>\v2.0.50727\CONFIG\web.config.comments under the compilation section to see
the default imports (there are nine).
>
For 1.1 look in <framework dir>\v1.1.4322\CONFIG\machine.config. There are eight listed there. The
new one in 2.0 is System.Configuration.
>
Kevin Jones

don't you consider mscorlib to be one of them ?

Quote:

Originally Posted by

>
<add assembly="mscorlib" />

Oops, yep of course.

Quote:

Originally Posted by

Also, doesn't the vbc compiler automatically import

Microsoft.VisualBasic ?

Ah! I don't do VB, so I didn't look :)

Quote:

Originally Posted by

Also, isn't the list supplied in the default web.config's pages

element accurate ?

Quote:

Originally Posted by

>
<pages>
<namespaces>
<add namespace="System" />
<add namespace="System.Collections" />
<add namespace="System.Collections.Specialized" />
<add namespace="System.Configuration" />
<add namespace="System.Text" />
<add namespace="System.Text.RegularExpressions" />
<add namespace="System.Web" />
<add namespace="System.Web.Caching" />
<add namespace="System.Web.SessionState" />
<add namespace="System.Web.Security" />
<add namespace="System.Web.Profile" />
<add namespace="System.Web.UI" />
<add namespace="System.Web.UI.WebControls" />
<add namespace="System.Web.UI.WebControls.WebParts" />
<add namespace="System.Web.UI.HtmlControls" />
</namespaces>
</pages>

Yep, but I was listing the assemblies not the namespaces, which of
course I should have been.

Quote:

Originally Posted by

Won't any namespace defined in web.config be automatically imported,
and you will not have to import it specifically ?
>
See :
>

http://msdn2.microsoft.com/en-us/li...collection.aspx

Quote:

Originally Posted by

and
>

http://msdn2.microsoft.com/en-us/li...gessection.aspx

Quote:

Originally Posted by

Juan T. Llibre wrote:

Quote:

Originally Posted by

re:

Quote:

Originally Posted by

>Look in <framework dir>\v2.0.50727\CONFIG\web.config.comments under the compilation section to see
>the default imports (there are nine).

>
Kevin,
>
>
>
>
Juan T. Llibre, asp.net MVP
aspnetfaq.com : http://www.aspnetfaq.com/
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en espaol : http://asp.net.do/foros/
===================================
"Kevin Jones" <kjonesNOSPAM@.develop.comwrote in message
news:O6w44soyGHA.1252@.TK2MSFTNGP04.phx.gbl...

Quote:

Originally Posted by

>Juan T. Llibre wrote:

Quote:

Originally Posted by

>>re:
>>>If I am not wrong, System.IO is one of the seven namespaces
>>>that get imported in all ASP.NET page automatically
>>You are wrong.
>>>
>>If you wish to use System.IO, you must import it explicitly.
>>>
>>>
>>>
>>>
>>Juan T. Llibre, asp.net MVP
>>aspnetfaq.com : http://www.aspnetfaq.com/
>>asp.net faq : http://asp.net.do/faq/
>>foros de asp.net, en espaol : http://asp.net.do/foros/
>>===================================
>>"Arpan" <arpan_de@.hotmail.comwrote in message
>>news:1156708999.220650.277560@.m79g2000cwm.googlegr oups.com...
>>>If I am not wrong, System.IO is one of the seven namespaces that get
>>>imported in all ASP.NET page automatically but in the following code:
>>>>
>>><%@. Import Namespace="System.IO" %>
>>><script runat="server">
>>> Sub Page_Load(ByVal obj As Object, ByVal ea As EventArgs)
>>> Dim ioFileInfo As New FileInfo("C:\Inetpub\wwwroot\File1.asp")
>>>>
>>> lblOutput.Text = "Name: " & ioFileInfo.Name & "<br>"
>>> lblOutput.Text += "Path: " & ioFileInfo.DirectoryName & "<br>"
>>> lblOutput.Text += Last Accessed: " & ioFileInfo.LastAccessTime
>>>& "<br>"
>>> lblOutput.Text += Last Written: " & ioFileInfo.LastWriteTime &
>>>"<br>"
>>> lblOutput.Text += Size: " & ioFileInfo.Length & " bytes"
>>> End Sub
>>></script>
>>><form runat="server">
>>><asp:Label ID="lblOutput" runat="server">
>>></form>
>>>>
>>>if I get rid of the <%@. Import....%line, then ASP.NET generates the
>>>following error:
>>>>
>>>Type 'FileInfo' is not defined.
>>>>
>>>pointing to the very first line within the Page_Load sub (Dim
>>>ioFileInfo As New FileInfo...).
>>>>
>>>Why?
>>>>
>>>Please correct me if I am wrong.
>>>>
>>>Thanks,
>>>>
>>>Arpan
>>>>
>>>

>Look in <framework dir>\v2.0.50727\CONFIG\web.config.comments under the compilation section to see
>the default imports (there are nine).
>>
>For 1.1 look in <framework dir>\v1.1.4322\CONFIG\machine.config. There are eight listed there. The
>new one in 2.0 is System.Configuration.
>>
>Kevin Jones

>
>

Wednesday, March 28, 2012

System.IO?

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