upload picture with file upload control

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i have a updatepane;
in this update panel is a panel
in this panel is a fileUpload and a Button
i do clicked on the fileupload and select a file,
and when click on the button return ""
in my button_click is this code:
button1.text= filaeupload1.filename;
why return null value?

my code is this:
<asp:panel ....>

<asp:updatepanel ....>
<content template="">

<asp:fileupload ....>
<asp:button ...onclick="clickonbutton">

br mode="hold" />

br mode="hold" />
and in "clickonbutton " is this code :

button1.text=fileupload1.filename;

this code always return null("")

when i do delete update panel from mproject is true and my project returned filename of selected file

in tha latest ,i want can only selectable jpg file

Posted 29-Jun-12 1:45am

sadegh_rusta

Updated 29-Jun-12 2:13am

v2

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ajay.anilmaddi 29-Jun-12 7:48am

I cant understand Ur Problem,
Please improve Ur Question???

3 solutions

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**AmitGajjar** · Answer 1 · 2012-06-29T02:46:00

Hi,

After reading your comments what i understand is, you need to upload file Asynchronously. you can not use default Fileuploaded with Update panel to upload file. you need to use some thirdparty control for Asynchronous file uploading.

Read Asynchronous File Upload[^] Article. this may help you,

Thanks
-Amit.

Mits Machhi · Answer 2 · 2012-06-29T02:50:00

use Trigger on Script Manager :

XML

<asp:ScriptManager ID="sc1" runat="server">
         </asp:ScriptManager>
         <asp:UpdatePanel ID="u1" runat="server">
             <ContentTemplate>

// your content

XML

</ContentTemplate>
                <Triggers>
                    <asp:PostBackTrigger ControlID="Submit" />
                </Triggers>
            </asp:UpdatePanel>

in Submit name give your Save or Submit button name.

This will help you.

Mits Machhi · Answer 3 · 2012-06-29T02:50:00

Solution 4

use Trigger on Script Manager :

XML

<asp:ScriptManager ID="sc1" runat="server">
         </asp:ScriptManager>
         <asp:UpdatePanel ID="u1" runat="server">
             <ContentTemplate>

// your content

XML

</ContentTemplate>
                <Triggers>
                    <asp:PostBackTrigger ControlID="Submit" />
                </Triggers>
            </asp:UpdatePanel>

in Submit name give your Save or Submit button name.

This will help you.

Posted 29-Jun-12 2:50am

Mits Machhi

Comments

sadegh_rusta 29-Jun-12 9:46am

where i do my fileupload

[no name] 30-Jun-12 0:12am

Put file upload and all other things between Content Template.

sadegh_rusta 30-Jun-12 16:34pm

how is triggers tag?

[no name] 2-Jul-12 0:11am

because when you upload file it makes Postback and your upload file becomes null and that`s why using postback trigger applied on submit button , it postback only when Submit button click not at upload a file and you save a upload file Easily.

upload picture with file upload control

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