Hidden Field Value Lost On PostBack?
Mar 12, 2010
I have a hiddenfield, which I want to save the scroll position of asp.panel scrollbar during postback, and when during postback this value is called back to set the scroll position.
Using javascript I can grab the value from the scrollbar, and assign it to the hidden field, but when I post the page back the value has gone.
Here is my code snippet:
<script type="text/javascript" language="javascript">
function SetScroll(val) {
[code].....Am I missing something? How do I keep the value during post back?
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Feb 4, 2010
I have a problem
<script language="javascript" type="text/javascript">
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Nov 18, 2010
I am working on an ASP.NET application (well supposed to be deploying it about 3 days ago) and my hidden fields are loosing value when the form gets posted back..
I am using them to store information i write using javascript and on my own machine this works fine but as soon as i deploy it on our server everything else works except these values are lost..
I am using the .NET AJAX control toolkit on the same page and have noticed my calander datepicker also looses the data..
I have checked using firebug and the data is definitely getting post to the server but is getting lost somewhere!
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Nov 23, 2010
i have a javascript function written like this
[code].....
Now this is working fine but , lets say i have 10 textboxes, if i change the value one the first textbox to be the same as the second textbox , it means it is a duplicate, now the problem here is that the value of the hidden field does not get updated immidiately , you have to click twice to get the real value.
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Sep 18, 2010
you save data into a dynamic hidden field ,which is created dynamically during the handling of some postback event.what is the best way to retrieve it from this field upon a postback, (besides searching the request for the key of this hidden field and then retrieving the corresponding value as in the code below)?
protected void Button2_Click(object sender, EventArgs e)
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Jul 29, 2010
I have a component that determines a value on a postback event.
protected void Button_Click(object s, EventArgs e)
{
HiddenField.Value = 5;
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There's more involved in the value of course, but HiddenField is an asp:HiddenField control with runat=server set. I have in my javascript:
var id = $("#<%= HiddenField.ClientID %>").val();
The code in the javascript is set to be run only after the postback has occured (a different client click event) for the purpose of passing the hidden field value via QueryString to another URL (since i can't do a response redirect on postbacks and the client wants it in a different page anyway).
I tried adding:
ScriptManager.RegisterHiddenField(HiddenField, "Value", string.Empty);
To a !Page.IsPostback section of code, but the ID is still not set when the javascript is run.
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Jun 7, 2010
I have a ascx page where I am using a hidden field to store the value of a the drop down box as it is generated using a google address finder. My problem is that when I try to store the value directly in the hidden field :
hfDdlVerifyID.Value = ddlVerifySS.SelectedValue;
in the event of a button click, the value is stored but on postback is lost again. Whereas, if i try to use Scriptmanager to do it, nothing is stored.
getBuild.AppendLine("$get('" + hfDdlVerifyID.ClientID + "').value = $get('" + ddlVerifySS.ClientID + ").value;");
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Mar 23, 2011
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Jan 17, 2011
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public class DualListPanel : SWebControl, INamingContainer
{
protected IList<DlpItem> UnassignedList { get; set; }
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Jan 4, 2011
I must be doing something wrong, but this makes sense to me. I have a Listbox loaded with tons of items from a datasource. A user clicks one of these items it grabs the selectedindex (an integer) and stores it in a HiddenField (works fine).
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Question 2: How?
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[Code]....
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[Code]....
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[Code]....
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The Default.aspx code snippet
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