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Hi,

I am creating a web application in asp.net in which I have to show an
openfiledialog box to select the file and display the selected file with its
path in a text box.
I try to solve this problem with the System.Windows.Forms.OpenFileFialog.

I use

Imports System.Windows.Forms

In the sub the code is like...

Dim ofd As OpenFileDialog = New OpenFileDialog

If ofd.ShowDialog() = DialogResult.OK Then
txtPath.Text = ofd.FileName()
End If


I get the following Error.


It is invalid to show a modal dialog or form when the application is not
running in UserInteractive mode.Specify the ServiceNotification or
DefaultDesktopOnly style to display a notification from a service application.

What should I do to get the openfiledialog box to appear?
Where can I Specify the ServiceNotification?
Is it possible at all to use the System.Windows.Forms base in a Web form?

I'm not that familiar with asp.net.

Many thanks!

Hi Willem,

You can't use Windows component, such as OpenFileDialog,
on web server-side. You may use HtmlInputFile, HTML <input
type= file> element, to select file on client-side.

Hope it helps,

Elton Wang



>-----Original Message-----
>Hi,
>
>I am creating a web application in asp.net in which I
have to show an
>openfiledialog box to select the file and display the
selected file with its
>path in a text box.
>I try to solve this problem with the
System.Windows.Forms.OpenFileFialog.
>
>I use
>
>Imports System.Windows.Forms
>
>In the sub the code is like...
>
>Dim ofd As OpenFileDialog = New OpenFileDialog
>
>If ofd.ShowDialog() = DialogResult.OK Then
> txtPath.Text = ofd.FileName()
>End If
>
>
>I get the following Error.
>
>
>It is invalid to show a modal dialog or form when the
application is not
>running in UserInteractive mode.Specify the
ServiceNotification or
>DefaultDesktopOnly style to display a notification from a
service application.
>
>What should I do to get the openfiledialog box to appear?
>Where can I Specify the ServiceNotification?
>Is it possible at all to use the System.Windows.Forms
base in a Web form?
>
>I'm not that familiar with asp.net.
>
>Many thanks!
>.
>

Thats easy!

Many thanks

Willem

>-----Original Message-----
>Hi Willem,
>
>You can't use Windows component, such as OpenFileDialog,
>on web server-side. You may use HtmlInputFile, HTML
<input
>type= file> element, to select file on client-side.
>
>Hope it helps,
>
>Elton Wang
>
>
>
>>-----Original Message-----
>>Hi,
>>
>>I am creating a web application in asp.net in which I
>have to show an
>>openfiledialog box to select the file and display the
>selected file with its
>>path in a text box.
>>I try to solve this problem with the
>System.Windows.Forms.OpenFileFialog.
>>
>>I use
>>
>>Imports System.Windows.Forms
>>
>>In the sub the code is like...
>>
>>Dim ofd As OpenFileDialog = New OpenFileDialog
>>
>>If ofd.ShowDialog() = DialogResult.OK Then
>> txtPath.Text = ofd.FileName()
>>End If
>>
>>
>>I get the following Error.
>>
>>
>>It is invalid to show a modal dialog or form when the
>application is not
>>running in UserInteractive mode.Specify the
>ServiceNotification or
>>DefaultDesktopOnly style to display a notification from
a
>service application.
>>
>>What should I do to get the openfiledialog box to
appear?
>>Where can I Specify the ServiceNotification?
>>Is it possible at all to use the System.Windows.Forms
>base in a Web form?
>>
>>I'm not that familiar with asp.net.
>>
>>Many thanks!
>>.
>>
>.
>