AJAX :: Retain FileUpload Control Value On PostBack
May 7, 2015
I have a grid view which is costomized.I upload a image in this,when i click edit button then give error (Specified cast is not valid.)
<td align="center" rowspan="11" style="width: 130px" valign="top">
<asp:FileUpload ID="FileUpload4" runat="server" Width="100px"
Enabled='<%# bind("imagePath") %>' />
<asp:Label ID="lblimage" runat="server" Text='<%# Bind("imagepath") %>'
Visible="False"></asp:Label>
</td>
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Similar Messages:
Mar 27, 2010
I have seen many posts here regarding this, but none with a successful solution.I m using a asp.net fileupload control & not the html one.I have various controls on the page, & on a listbox control, listitem selection, page postbacks.So before it, if i had selected a file for upload & page poastbacks, the the file goes off.Now on postback, I have got the filename in a hidden field, but since the Fileupload control doesnt have any setter methods, not able to get how to set the hidden field value & how to set it...
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Nov 15, 2011
I have a ASP.Net FileUpload control in my page. Once the File is uploaded I want to display the path in FileUpload control
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Oct 22, 2010
i have a fileupload control.I want to stroe its value to any page level object
& then retain the value back to fileupload control after post back.
how can i do this..
it gives error that filename is read only type.
for e.g.
Session["image"] = imageuploader.FileName.ToString();
imageuploader.FileName=Session["image"].ToString();
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May 7, 2015
My <input id="FileUpload1" name="FileUpload1" type="file"> and country dropdown both are inside update panel , now on selectedindexchanged it do postback , which i am triggering in update panel to avoid page refresh .
Now the problem is when i select any image in fileupload and then select country , my selectedimage vanishes but its path stays in textbox .
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May 7, 2015
Here is the sample code am trying.
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="conditional">
<Triggers>
<asp:PostBackTrigger ControlID="Button1" />
[Code] ....
This upload is working. But why the page is getting refreshed? this is not partial post back and instead it 's full post back. i have read the articles for the fileuplaod with issue inside the update panel. is there any way to achieve this asynchronous upload on button click?
I don't want to use the Ajaxtoolkit Asyncupload because that will upload (Ref : [URL] ....] the moment when we seelct the file itself which i don't want to do that. i need to do on the button click event.
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Apr 27, 2016
i have searched on google and got an article [URL] keep selected file in fileupload control even after page postback. But it's not working at all. So is there any way through which we can keep selected files in fileupload even after page postback.?
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Oct 14, 2010
I have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?
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May 14, 2010
We currently have a page with several user controls (8 of them) and when a control that is contained in an updatepanel initiates a postback the focus is not retained. In some cases, it looks like the focus is sent to the top of the page, and in other cases the focus looks like it is sent to the control with the TabIndex=1.
I have tried 3 different solutions and they all end up with the same result.
The first two were from article:
[URL]
Solution 1: At the end of the server event executed in postback, add:
[Code]....
The article says both of those solutions worked, but for us, neither of them did.[Code]....
ASPX.CS
[Code]....
[Code]....
In all 3 scenarios the control we want to have the focus gets the focus for a split second and then the focus is cleared (set to the top of page, or TabIndex=1).
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Sep 11, 2010
I'm having a little problem with my file uploading. Does anybody know how to maintain the value in the FileUpload control between server posts?
I have a form which, among other things, uploads a file. I am using an ileUpload control (created dynamically) to let a user browse their PC for a file and then using the SaveAs method to upload the file to the server.When I'm selecting a file and Click on Next button for processing then selected file is lost.
Same is happening with me with HtmlTextArea (dynamically generated) , the problem was that I was not again re-initializing the controls after postback. What I did is re-initialized it in Init method of placeholder (as I have created/placed all dynamic controls in placeholder ).
But this thing is not working for fileupload control. I found solution in one of the forum is that "use hiddenField Control to transfer the selected file from the client to server"but this mechanism will only help to retain the name of file
in a hidden variable and the FileUpload1.PostedFile.SaveAs(filename) will not work bcz of absense of object (fileupload1).
here is code:
[Code]....
I have done almost the same in different test project , it works . I dont know whats wrong?
[Code]....
How to correct this?
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Sep 30, 2010
I have a FileUpload control and a DropDownlist control in an UpdatePanel and when user select a file for the FileUpload control (no upload yet), in the meanwhile the user select an option from the DropDownList control which will cause a postback! Once the page postback, the path selected in the FileUpload control will gone. How can i remain the path in the FileUpload control? File uploading function was working. I hope can remain the path in the FileUpload control during postback.
I have tried the solution below but the "FileUpload1.HasFile" will return false to me.
If Session("FileUpload1") Is Nothing AndAlso Upload.HasFile Then
Session("FileUpload1") = Upload
lblPhotoUploadErr.Text = Upload.FileName
ElseIf Session("FileUpload1") IsNot Nothing AndAlso (Not Upload.HasFile) Then
[Code]....
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Nov 22, 2015
I have Created a Web page with master page. Page Contains two dropdown list i am using Update panel with trigger.
when I select image using fileupload after state and city changes then record submitted with Image but when i select the image after that i did some changes with state and city on that time fileupload lost its selected file or files .
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Apr 29, 2010
I am using .net 3.5 framework. I have a Tabcontainer inside that I have place asp.net fileupload control which is inside update panel. It's been known fact that fileupload control does not work under update panel unless we use Postback Triggers.
[Code]....
[Code]....
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Mar 16, 2011
i hv postback event executing after i am trying to upload a file to server to ask for conformation by the user. after postback fileupload control gets cleared and i am not able to get its value after postback. controls viewstateEnabled property is true. How do i assign a file path to fileupload control after postback.
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Dec 19, 2012
I have gridview. In my griview, i have Fileupload template field.
but, problem is whenever my page get postback fileupload loses its content or selected file.
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May 4, 2010
I'm using five FileUpload controls on a single web form. Besides allowing the user to upload a file I also am collecting user data. Problem I run into is during the server side validation if any of the user data is invalid on a post back when content it redisplayed the FileUpload controls loose the client url that was selected when browsing. How can I keep that path or set the pathing on the control so they do not have to keep rebrowsing for the files on data validation errors? Right now breaking up the two form sets user data and file upload into two pages is being frowned upon and requirments would like it to be on all one page.
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May 7, 2015
My combobox and asp:fileupload and imagepreview all are inside update panel , my combobox is doing postback after which my image disappears.... how to retain back image after postback ?
In [URL] .... if I remove input:file and put asp:file then it will be possible ... here's all code:
using System;
using System.Drawing;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Default3 : Page
[Code] ....
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Mar 17, 2010
I have an IEnumerable< T> which is declared on the page like this:IEnumerable< Person> person;When the page postsback, the person list is null. How can I retain the values of person list without declaring it as static? Sr. devs in my company say that you should not declare the list as static.
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Aug 19, 2010
Right now I have an asp:Wizard with 3 Steps.
Create User
Form to Email
Summary of Fields
When the finish button is clicked on the third step I would like to Create the user and send the form. I have the logic for this written but the only problem I have is the when the next button is pressed on a wizard, a PostBack occurs and my password field:
<asp:TextBox ID="txtPassword" TextMode="Password" Width="70%" runat="server" />
Does not retain its value.
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Jul 23, 2010
How can we retain Panel scroll position on postback without using any cookies.
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Feb 18, 2014
I am using string builder class to store the dropdown selected values .. I am doing this on the selected index change event .. The problem is the previous value does not retain ..
sb.Append(degreedropdown.SelectedValue+"-");
string nums = sb.ToString();
string pattern = "-";
string[] substrings = Regex.Split(nums, pattern);
arraylength = substrings.Length;
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Nov 20, 2010
This is a problem I'm facing in a webapp I'm currently working on. So instead of cluttering the question with unrelated code, I recreated the problem in an isolated, simplified webapp that only demonstrates this issue.
I have a web user control with just this as its content:
<% if (ShowAlertScript)
{ %>
<script type="text/javascript">
function AlertMe()
{
alert('Hello World!');
}
</script>
<% } %>
<input type="button" onclick="AlertMe()" value="Say Hello" />
And its codebehind has nothing more than the boolean definition of ShowAlertScript. This represents a control I have in the big webapp that has two modes: input mode, and display mode. When in input mode, it has a large javascript block that is only useful then; it does some cool stuff to help the user input the info.The way this control is laid out in the big picture is as follows:
<asp:ScriptManager runat="server" />
<asp:UpdatePanel runat="server">
<ContentTemplate>
<asp:MultiView ActiveViewIndex="0" runat="server" ID="mvw">
<asp:View runat="server">
<asp:Button runat="server" ID="btnSwitch"
OnClick="btnSwitch_Click" Text="Switch" />
</asp:View>
<asp:View runat="server">
<uc:MyInputControl runat="server" ID="micInput" ShowAlertScript="true" />
</asp:View>
</asp:MultiView>
</ContentTemplate>
</asp:UpdatePanel>
When you click btnSwitch, it simply switches to the second view with the user control. Notice how I have the ShowAlertScript already initialized to true. The potential output is that since I'm "showing the alert script" within the user control, the AlertMe() function will execute when you click the input-button element, because it's written out according to the inline if statement.
If you run this code I gave you so far as is, it will not work. The browser will say it can't see the AlertMe() function; it's undefined as far as it knows. But if you take out the UpdatePanel (or disable the ScriptManager's partial rendering), it will work just fine on a full postback when you click btnSwitch.
I want it to work on a partial postback, because this whole thing is a small piece compared to the rest of the page, and I don't want to do a full postback every time they switch views. Apparently, the ScriptManager doesn't even bother re-rendering the ascx file for possible changes. Either the ScriptManager is not smart enough, or there is an option I'm missing to let it render the <script> so I can invoke its methods on the client side. A potential answer someone might suggest is "why don't you take out the javascript, put it in its own .js file, and have the page reference it so it's available to the control?"
That won't really work with me, because the script block does some initialization and modification that pertain to that single control instance, not to all others on the page.
In turn, you might also be concerned that if I have more than one instance of the control, I end up with copies of the same script. Not really; there will only be ONE input mode of this control in a page at any given time, it's just that I have those two modes in two separate views and I let the user switch between them.
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Nov 22, 2010
I am having an aspnet panel in my aspx file.There is an ultraweb tab placed inside this.also I am having a button outside this panel.Within the tab I have a textbox whose readonly property is
set to "true".Whenever I click the button a javascript function is called .On clicking 'OK' in the popup ,the textbox values are lost.Is there a way to retain these values?
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Jul 24, 2013
I have the example working but I added a Select Command to the Detail grid for the purpose of selecting a detail record which will redirect to another page. The problem is that when the Select command is clicked the expanded detail grid collapses as if I had clicked the minus. The page and codebehind are:
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Search1.aspx.vb" Inherits="iDCA.Search1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
[code]...
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Sep 6, 2010
The graphic designer of a project I'm building a web site for chose jquery.tools [URL] for a tabs tool in the site. Unfortunately it seems that the tool doesn't behave properly on a postback in IE7 or IE8 (it does behave properly in FireFox, Chrome and Safari). Does anyone have experience using the jquery.tools with asp.net? and know how to retain the tab index on a postback? I've tried a lot of things and can't get it to work. The code i'm using now is as follows:
$("ul.tabsScenario").tabs("div.panes > div");
var tabIndex = $('#ctl00_ContentPlaceHolder1_EnInDeToekomst1_HiddenFieldTabIndex').val();
$("ul.tabsScenario").tabs('select', tabIndex);
where the tab index is stored in a hidden field (HiddenFieldTabIndex). The above code works fine in Firefox, Chrome and Safari, but not in IE7 or IE8. I am using a ScriptManager and UpdatePanels, but in an extremely simple website example I can't even get the jquery.tools tabs tool to work. There are some unanswered posts on the Jquery.Tools forum concerning this topic, but yeah, that doesn't help much. I've already determined that the jquery.ui tabs tool works well after a postback but that would cost a lot of refactoring in our project as far as html and css goes. I'd like to avoid that.
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