AJAX :: Access Hidden Field In ASPX Page In WebMethod In Code
Aug 20, 2012Looking for sample to access the hidden variable which is declared in the aspx page in the webmethod.
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[Code]....
and I call this function from JavaScript as below:
[Code]....
I want to know what is this technique called and what is the advantage of calling the function on that way
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May 19, 2010I have a service that works great on my development box. It uses JQuery to hit my web service, and then the JSON results are sent back.
The web service is located on our basePage.cs. We didn't want to put out an external WebService for this. Our on beta box something different is happening.
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View 2 RepliesWeb Forms :: Unable To Access Hidden Textbox Value In Webpart On Aspx Page
Jan 7, 2010I have a requirement where I have a webpart and two ImageButtons(imgGV, imgLV) and a hidden input textbox('ctl00$MainHeaderContent$txtType') in an aspx page. I need to change templates to this Webpart either to show results in "Grid View" or as "List View" on the click of this ImageButtons. I added code in the page_load of .aspx page as
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imgGV.Attributes.Add("onclick", "document.getElementById(('ctl00$MainHeaderContent$txtType')).value='GV';return true;");
When I am clicking the specific ImageButton, it has to write into hidden field either "GV" or "LV". In the webpart CreateChildControls I assign templates based on the text in Hidden field either "GV" (Grid Template) else "LV" (List Template). In the CreateChildControls of Webpart for the template change, I am getting the Hidden value as empty. I am using coding as
HtmlInputHidden t = new HtmlInputHidden();
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if (t.Value=="GV") {
assign one template}
else { another template}.
I am getting t.Value="". Question is: Is it like if we add some text in a hidden textbox using the Javascript function in an aspx page, the same textbox value in the same aspx page but in the Webpart class in the CreateChildControls method using the code as this(webpart).page.FindControl("Textbox").text is showing empty. So the text added using Javascript into Textbox is it not available in the code behind code using "Text" property of the same Textbox?.
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how do I read the hidden "code" field in a code behind page using c#?
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AJAX :: Access A Page Property From Inside A WebMethod?
Jul 22, 2010Within a WebMethod I need to access a Page Property. The code is generating an error:
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[Code]....
Reading Int From A Hidden Field In .aspx?
May 24, 2010I'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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Mar 23, 2011I 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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Mar 26, 2010i 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.
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View 3 RepliesWeb Forms :: Accessing Hidden Field From The User Control On Aspx Using Javascript
May 28, 2010I 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.
Assign A Hidden Field Value On Default.aspx Using BasePage Class Methods?
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View 1 RepliesHidden Field Not Retaining Value When Updated From Code Behind?
Feb 14, 2011I'm using a hidden field to store a value in an asp.net page. Basically I set the value of the hidden field whenever a value on the form is changed i.e. first name, date etc. The field is on a webform that has a master page and is in the content section:
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<asp:HiddenField ID="hdnDirtyFlag" runat="server" Value='false' />
I change the value of the field in javascript by calling a function whenever an onchange event fires in other controls on the web form:
<asp:TextBox CssClass="niceInput" ID="tbFirstName" runat="server" MaxLength="40" Width="150" onchange='SetHiddenVariable();'></asp:TextBox>
<script type="text/javascript">
function SetHiddenVariable() {
// Set the value of the hidden variable so we know a field has been updated
var hiddenControl = '<%= hdnDirtyFlag.ClientID %>';
document.getElementById(hiddenControl).value = 'true';
}
</script>
So far so good. When the page loads the hidden field value is 'false', and if I don't change any values on the webform it remains false. Whenever I do change another control the javascript function gets called and the hidden field value gets updated to 'true'. Again this is all fine.
After I submit the form and update the database, I set the hidden field value back to 'false' in the code behind:
hdnDirtyFlag.Value = "false";
But when I click another button and do a postback, the hidden field value is still at 'true'.
Can anyone explain why this is? I stepped through the code behind and immediately after changing the value I can see the value is 'false'. There is an asp:UpdatePanel on the page but the hidden field is not part of this panel.
EDIT:
This is the code I use to check the value of the field in code behind in the second postback, after it has been set to false in the last step of the first postback. The value remains at true for some reason in the second postback, after it has been set to true in javascript on the client side then set back to false in code behind as shown above:
if (hdnDirtyFlag.Value == "true")
{
UpdateSecurityObject();
}
Web Forms :: HTML Hidden Field With Runat Server Not Available In Code Behind
Jan 24, 2016I am facing one asp.net server side issue using vb.net the problem is i declared one html input hidden field in my page, the name is hidden1. but when i going to call that name into server side code, that time i got the below error, <b>Name "Hidden1" is not declared</b> Code below:
Default.aspx
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WebApplication2._Default" %>
<!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 id="Head1" runat="server">
[code]....
Can't Retrieve Value In The Webmethod Of The Aspx Page
Mar 17, 2011I set the Session["PhotoId"] in a normal aspx. But I can't retrieve value in the webmethod of the aspx page.
[WebMethod(EnableSession=true)]
public static string Submit(string data1, ...)
{
string test = HttpContext.Current.Session["PhotoId"]; // test is null
}
What should I do?
Gridview Hidden Field - How To Get A Hidden Field Value Using JavaScript
Jan 7, 2010I 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.
AJAX :: 3.5 - Using For Existing Application - Hidden Field
Mar 11, 2010I have running 3.5 application, an i want to use ajax for this application after enabling ajax everything workign fine but i have a problem with hiddent fields. As I have hidden field i set a value tru or false in it but he data is dublicated like (False, False) I donot know how, or from where this dublication is comming.
View 1 RepliesAJAX :: Access UI Element Through Webmethod?
Jan 7, 2011I would like to write some html content to div element through web method. The web method should be like
[System.Web.Services.WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public static string LoadImages1()
{
[Code]....
without passing data to success block, I have to write at webmethod it self.
Web Forms :: Value Of Hidden Field In Child Page Not Getting Correctly From Master Page
Jun 1, 2010I have a hidden field (hfUnsaved)in my child page . On keypress of my textbox i am setting the value into the hiddenfield using the following javascript function
[Code]....
On load: txtProject.Attributes.Add("onkeypress", "return Click('a');");
On button click i am removing the value from hidden field as follows:
[Code].....................
Web Forms :: Master Page Hidden Field Accessed Through Content Page?
Aug 18, 2010Wondering if it is possible to access a master page's hidden field (ex. <Input Type="Hidden" ID="TestHiddenField" Value="testValue"/>) From a Content Page's C# Pack CS Page.If it is possible, How do I go about doing so? I have tried:
PreviousPage.Master.FindControl("[TestHiddenField]") but no .Value attribute and no luck in general.
AJAX :: Accessing Placeholder From Webmethod - An Object Reference Is Required For The Non-static Field
Mar 22, 2010Aplogies if this has been discussed before but I couldn't find an answer.
I'm trying to use jquery/Ajax to access some webmethods in my codebehind. This is fine, but I would in my function like to reference a placeholder (phStory in the code below) on my page and also load a usercontrol into that placeholder.
Unfortunately I get the message: "An object reference is required for the non-static field, method, or property 'TestControls.phStory' " and similar for the usercontrol. Does anyone know how I can still access my placeholder and usercontrol from within this.
It has to be stati as it's a WebMethod but this then throws up these errors.
[code]....