Problem With File Upload Button on change of dropdownlist

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Hi All,

I have a fileupload button and a dropdownlist in the page.

After I select a path in the fileupload button and onselectedIndex change of a dropdown, the path in fileupload button gets cleared off.

I know its because of autopostback property of a dropwn list. But I don't want the path to be cleared in a fileupload on select of a dropdown list..

Any help or suggestion would be greatly appreciated.

Thanks,

Posted 26-Jul-12 21:04pm

Raj.rcr

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Raj.rcr 27-Jul-12 16:57pm

Thanks All... I have got the solution after following all of your suggestions..

4 solutions

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AshishChaudha · Answer 1 · 2012-07-26T21:19:00

Solution 1

Dear Raj,

In design, put your Fileuploader in last of the page, in every postback of dropdownlist, fileuploader will be cleared. so better to put your Fileuploader in last of the page

Thanks
Ashish

Posted 26-Jul-12 21:19pm

AshishChaudha

kingsa · Answer 2 · 2012-07-26T21:23:00

;asp:updatepanel id="up1" runat="server" xmlns:asp="#unknown">
<contenttemplate>

<asp:dropdownlist>
<asp:fileupload>

<asp:button id="btnsubmitresut" runat="server" validationgroup="aa" text="submit" onclick="BtnSubmit_Click" />

<triggers>
<asp:postbacktrigger controlid="btnsubmitresut" />

Sandeep Mewara · Answer 3 · 2012-07-26T21:23:00

AFAIR, you won't be able to show the full path because of security reasons (maximum possible would be filename)

Add this code in your code behind file in selectedchanged event method:

C#

myFileUpload.Attributes.Add("value", fileNameYouWantToShow);

Suggestion:
Keep the fileupload control at the end after all the postbacks, such that once page is submitted you can upload the file from upload control. You won't need to maintain the text in the control via this implementation.

_Amy · Answer 4 · 2012-07-26T21:28:00

Solution 4

Hi,
It is clear that on postback of the page your fileupload control is not storing ViewState. So try setting the following properties of your fileupload control:

HTML

EnableViewState="true"
ViewStateMode="Enabled"

This may help you.

--Amit

Posted 26-Jul-12 21:28pm

_Amy

Problem With File Upload Button on change of dropdownlist

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