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notsosuper
Posting Yak Master
190 Posts |
 Posted - 2005-05-18 : 13:02:33
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| I am new at vb.net. I know this is SQL forum, but still maybe someone can have any ideaI have a input type = file that gives me browse button and text box for choosing files. And I have dropdown box that needs to be set to autopostback to true, but everytime autopostback happens it clears the textbox beside the browse button. Is there anyway to keep the value of the text box even though dropdown value changes? <edit> Moved to .Net Forum </edit> |
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DustinMichaels
Constraint Violating Yak Guru
464 Posts |
Posted - 2005-05-18 : 13:20:56
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| This is a security setting in most browsers and I don't think it can be changed.Also using AutoPostBack to true is an accessibility problem to people who only use the keyboard. To fix this put a button next to the drop down list that they can click to post back the page.Dustin Michaels |
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notsosuper
Posting Yak Master
190 Posts |
Posted - 2005-05-18 : 13:26:01
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| Your suggestion is good but I have actually two dropdown list and when first one fires , second one fills accordingly, so I do need a set autopostback to true for the first one, then of course my input type = file which is text box and browse button value gets clear.. |
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jhermiz
3564 Posts |
Posted - 2005-05-18 : 15:06:45
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You need an if condition in the page load event...If Not IsPostBack Then...else...end if
Keeping the web experience alive -- [url]http://www.web-impulse.com[/url]Imperfection living for perfection -- [url]http://jhermiz.blogspot.com/[/url] |
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notsosuper
Posting Yak Master
190 Posts |
Posted - 2005-05-18 : 16:18:01
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| I have this If IsPostBack = True Then Exit Subis this correct |
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jhermiz
3564 Posts |
Posted - 2005-05-18 : 18:51:07
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quote:
Originally posted by notsosuper
I have this If IsPostBack = True Then Exit Subis this correct
I dunno, I don't know your business you tell me if you want your app to just exit when you are at a postback?
Keeping the web experience alive -- [url]http://www.web-impulse.com[/url]Imperfection living for perfection -- [url]http://jhermiz.blogspot.com/[/url] |
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bmains
Starting Member
27 Posts |
Posted - 2005-05-19 : 09:25:03
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| Your <input type="file">, did you add runat="server" attribute to it? ViewState should retain the value if runat="server" is declared... |
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DustinMichaels
Constraint Violating Yak Guru
464 Posts |
Posted - 2005-05-19 : 09:40:27
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| If you try to set the value of a runat server file control then a .NET exception is thrown. This is not allowed because if it was then people could hide file uploader boxes with CSS and download files off peoples machines without them knowing. Also you don't need to have viewstate turned on to keep values from TextBoxes and DropDownLists when the page posts back. This is done thru the Request.Form collection object in ASP.NETDustin Michaels |
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bmains
Starting Member
27 Posts |
Posted - 2005-05-19 : 12:55:32
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| Yes, but turning off viewstate in this situation would require much more extra work because of the two data-bound dropdownlists. In this situation, viewstate would be the best option. In addition, runat="server" should work; I've used it in my applications; in fact, there will be a server control in the 2.0 framework. |
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mohdowais
Sheikh of Yak Knowledge
1456 Posts |
Posted - 2005-05-20 : 08:42:54
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| Actually, I dont know why you would need to retain the file name in the File upload control. If the form is submitted, the file will be uploaded with it, and you will have access to the actual file on the server. You could save the file, and probably display a link to the it when the page reloads. And if the user chooses to upload another file, you could just replace it with the new one.OS |
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Autopostback