Web Forms :: Accessing Hidden Field From The User Control On Aspx Using Javascript
May 28, 2010
I have a user control that i have registered to an aspx page. Now from the aspx page, i am trying to access one of the registered usercontrol's hiddenfield value in my aspx page using javacript using the below code:
tst = document.getElementById('control1$hdnField').value;
I looked into the page's trace, and i could see 'control1$hdnField'. Then why i am not getting its value in my aspx page. I have also confirmed that the hidden field by this name exists in the user control and also has a default value set.
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Mar 23, 2011
I have a custom user control which contains a asp hiddenfield object. The value of this hidden field is being set using javascript and I have verified that the value is being set properly. When a postback occurs the new value is not being saved and I cannot access it in my code.
I believe the problem is because the user control is not saved in viewstate and therefore the hidden field value is not saved accross postback. How can I make the hidden field save its value? I tried accessing it from the early page cycles and still no luck.
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Oct 8, 2010
have a tree view control build dynamically. i want to change color of the selected node from client side. write the script given below. and its work fine.
[Code]....
[Code]....
[Code]....
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Jan 7, 2010
I have Gridview like this:
<asp:GridView ID="gvPartsSearchResult" runat ="server" CssClass="MRJ_TextGrid">
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:RadioButton
ID="rdButton"
runat="server"
AutoPostBack ="true"
onclick="javascript:CheckOtherIsCheckedByGVIDMore()"/>
<asp:HiddenField
ID="hdnFileExtension"
runat="server"
Value ='<%#Bind("FILE_EXTENSION")%>'/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
I want to read the hidden field value when the user clicks on the radio button.
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Mar 3, 2010
I am working on a page called Edit.aspx and on that page is a User Control.
Note: I need to access the User Control from a button that is on the Edit Page. Once I get a handle of the User Control then I need to access a DataList on that user control and finally I need to get the ID of a dropDownList
on the User Control
This is all the code I have,Goal: From the Edit page I want to drill backwards to the UserControl/DataList/DropDownList
'Geting the user control
Dim ctrl2 As UC_SiteTemplate2 = CType(Page.LoadControl("~/UC/SiteTemplate2.ascx"), UC_SiteTemplate2)
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Dec 20, 2010
There is one user control say uControl.ascx. This has a public property Message. There are 2 aspx pages Default.aspx and Home.aspx which has the user control uControl.ascx. When a sumit button from Default.aspx is clicked some action takes place and the value for Message is set and then execution is redirected to Home.aspx. In Home.aspx the value for Message is lost.
Is there anyways that the value of Message is retained for both the aspx pages?
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Mar 30, 2011
I have stored a string value in a hidden field of a page. How to access it from a different webpage?
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Mar 26, 2010
i would like to call the external js file's function onclientclick event, but how can i pass the parameter, which i get from the hidden field value from the same aspx file.
<asp:button id="btn" onclientclick="javascript:test(hidden_field);"/>
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May 24, 2010
I'm struggling to read an int from the hidden field on aspx page.
<input type = "hidden" id = "myIntegerId" name = "integerId" value= "<%: Model.MyObjectId %>" runat = "server" />
The value is definately on the form, I can see it in the debugger and print it with <%: %>
When I read the form values in the controller, instead of an int I recieve a following string: <%: Model.MyObjectId %>
I have tried casting data in the hidden field to string and calling ToString() method on that field, neither has worked.
The data is submitted using the post event.
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Apr 21, 2010
I have been trying to set the value of a hidden input by using Javascript and then access the value from within my C# codebehind. When I run the code that is copied below, the value that is assigned to assignedIDs is "", which I assume is the default value for a hidden input. If I manually set the value in the html tag, then assignedIDs is set to that value.
This behavior suggests to me that the value of the input is being reset (re-rendered?) between the onClientClick and onClick events firing.
html/javascript:
[code]...
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Oct 5, 2010
How can we use required field validator on User Control in aspx page*strong text*
I have one user control that have one drop down. I am using this control on my page. I want to use required field validator on this drop down.
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Feb 3, 2011
I inherited some JavaScript that I was told to integrate into our ASP.NET site. I thought this would be straightforward but it's turning out to be a bit of a challenge.
The code looks something like this:
<SELECT id="Question1" name="Question" onchange="updateQuestion();">
<OPTION value="notChosen">--Please Select One--</OPTION>
<OPTION value="in">India</OPTION>
<OPTION value="de">Germany</OPTION>
<OPTION value="fr">France</OPTION>
<OPTION value="us">United States</OPTION>
<OPTION value="ch">Switzerland</OPTION>
</SELECT>
The goal is to get the value from this HTML control into ASP.NET, however this control itself is being dynamically generated by another chunk of javascript, so I can't just change this to an asp.net control. My solution was to add the onchange="updateQuestion();" method, this JS will take these SELECT tags and place the values into an ASP.NET control:
function updateSecQ() {
var sQuestion = document.getElementById('<%=sQuestion.ClientID%>');
sQuestion.Value = "";
var questions = document.getElementsByName('Question');
for (question in questions) {
if (questions[question].value != null)
sQuestion.Value += questions[question].value + ",";
}
alert(sQuestion.Value);
}
As you can see, that's looking to update an ASP.NET control:
<asp:HiddenField ID="sQuestion" runat="server" value="" />
This appears to all work, however when I goto the server side on the form submit I see that sQuestion.Value is still = "".
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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)
{
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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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Nov 3, 2010
Is that possible? The reason why am doing this is because I need to parse that variable into a an JQuery function so I wanted JQuery to read that field. Can I Assign that value in base class or I have to do it within default.aspx pageload method?
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Aug 20, 2012
Looking for sample to access the hidden variable which is declared in the aspx page in the webmethod.
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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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Feb 18, 2011
I am calling a Java-script function, in that i am passing the value of hidden field, that hidden field i want to use at server-side, but the value of hidden field is null.
Client Side function
function getDetails()
{
document.forms[0].HdnNode.value=tree_selected_id; //HTML Hidden Field.
str="Cmp_12";
str_array=str.split("_");
var str_array1=str_array[0];
var str_array2=str_array[1];
document.getElementById("<%=HiddenNodeId.ClientId %>").value=str_array1;
document.getElementById("<%=HiddenTreeId.ClientId %>").value=str_array2;
}
Server Side Function
Public Sub InsertNodes(ByVal NodeId As String)
Dim objErrorObj As New ErrorObj
Dim ParentID As String
ParentID = HiddenNodeParent.Value
NodeId = HiddenNodeId.Value
Dim NodeIDTree As String
NodeIDTree = HiddenTreeId.Value
End Sub
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Sep 10, 2010
I've got a web site that has a master page and that master page (mpMaster that has a user control ucControl1) which has a sub user control (ucControl2), this user control has a property which accepts a value. Now, I have a page that uses the master page
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Mar 4, 2010
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Jul 14, 2010
I'm evaluating two options of accessing a server side data on client side. Little bit confused about the efficiency or may be you can call it as finding best approach to do it.
I need to access a server side data may be an integer value in javascript on client side. I know about two options to do it.Create a public variable or property on server side and set it to javascript variable on client side as below:
var value = eval(<% =value %>);
Create a asp hidden variable and set value in this hidden variable from server side and access it through javascript using document.getElementById().
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Nov 10, 2010
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uploads/../uploads/M_Banner_3-JO633939707781250000.jpg;uploads/../uploads/M_Banner_4-JO634014944056581250.jpg;uploads/../uploads/M_Banner_2-I-85634067544720151968.jpg;uploads/../uploads/M_Banner_1-Plan634067543966714468.jpg
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wrapperid: "fadeshow2", //ID of blank DIV on page to house Slideshow
dimensions: [568, 313], //width/height of gallery in pixels. Should reflect dimensions of largest image
imagearray: [
["images/1.jpg", "", "", ""],
["images/2.jpg", "", "", ""],
["images/3.jpg"],
["images/4.jpg", "", "", ""] //<--no trailing comma after very last image element!
],
displaymode: {type:'auto', pause:2500, cycles:0, wraparound:false},
persist: false, //remember last viewed slide and recall within same session?
fadeduration: 500, //transition duration (milliseconds)
descreveal: "always",
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})
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Dec 30, 2010
I want to move some parts of the html page containing this function to a new web user control. now "form1" is not defined and it is not working correctly without any error message!
admin.aspx:
Collapse |
Copy Code
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Jan 17, 2011
I have a custom control that has a hidden field. Upon postback I want to obtain the value stored in it, but it's always an empty string.I am performing client-side manipulation of the hidden field values and have verified in firebug that the fields are correct before issue a post back,Here is the setup:
public class DualListPanel : SWebControl, INamingContainer
{
protected IList<DlpItem> UnassignedList { get; set; }
protected IList<DlpItem> AssignedList { get; set; } [code].....
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Oct 29, 2010
I have a control in a 'window control library' which handles - 'drag and drop' files from computer to a listbox control, I then reference this .dll in .aspx (See code below). Now, when i try to access this through webserver for drag
and drop files i get following errror - The type of the first permission that failed was : System.Security.Permission.FileIOPermission.
How do I handle this, so that drag and drop of files can happen over the webpage residing at webserver.
namespace testWinControl1
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Jan 11, 2010
First of all, I´m new to asp.net.
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[code]
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