Web Forms :: Checkbox With Autopostback Not Working?
Jun 26, 2010
I have a gridview with checkboxes going down the side for each item. Some are enabled and others are not. At the top of the page is a checkbox which when checked will make all the checkboxes on the side enabled. THis is not working and I have tried 2 variations. What am I doing wrong?
In trying to improve 'user experience' with a GridView, I have an administrative application where a GridView is displaying records from a SQL table. One of the columns is a bit column, and is displayed as a checkbox in the GridView. I want the user to be able to simply check or uncheck the box while viewing the GridView, and the value in that column for that record is immediately updated. So I set AutoPostBack="true" on the CheckBox in the GridView's Template Field.
But tests are indicating that the column value is not actually getting changed, even though the page appears to post back and displays the newly checked (or unchecked) checkbox correctly. But if I check the SQL table directly the column's value has not changed.
The app is written in c# but i havn't posted any actual code as all the user code related to this markup seems to work fine.
The problem is the CheckBox chkTVLic has causes validation set to false and autopostback set to true. So whatever happens when i check and uncheck the checkbox it should postback. Most of the time this is exactly what it does and the result is to show and hide pnlTVLic when it is checked and unchecked. However if any on the validators within the panel fire, the checkbox does not cause a postback the first time. It will on all subsequent times but never the first. However it should ALWAYS cause a postback. What could be stopping it. Before someone asks there is no use written client side code, everything is pure .net markup and c# code.
When I select the item in 1st dropdownlist, values are fetched from database and want to display in second dropdownlist... but the autopostback is not working for the 1st dropdownlist..
I have a databound grid with a templated field column that is a checkbox. When the user checks the checkbox, it will autopostback and update the row to indicate the box's check state.
My first attempt was to simply use the OnCheckedChanged method, but when this gets called, I have no way to know which row the checkbox came from. Thus, I don't know which row to update.
Can anyone suggest a method to determine which row the checkbox that fired the oncheckedchanged event came from? Or can you suggest a better way to achieve what I need to do?
I cannot bind the checkbox to the data column because I do not want the checkbox disabled in select mode, and do not wish to require the user to enter edit mode to change the value. I also need all rows to be editable. So, the best route seems to be in a templated column.
I have an AJAX enabled ASP.Net 3.5 app in which I have:
A Master PageA Web Content PageA User ControlMore precisely, there's a Placeholder control in the Web Content Page into which one of many User Controls are loaded (one at a time or none at all).
The basic User Control I'm working with has a bunch of Labels and one DropDown ListBox. The latter control is a date selector - ie. June 2010, May 2010, April 2010, etc. When the user changes the date, since AutoPostBack = true for the control, a PostBack occurs. But when this happens, the User Control disappears!
All I want is for a partial postback to occur so that I can use the new date to repopulate the various Label controls. I even put the Placerholder control in its own UpdatePanel but this didn't resolve anything - the User Control still disappeared.
Now, when you select an item from the 1st DropDownList, you go t the right page, but then if you click on the browser back page, and select an item from the 2nd drop down, still the 1st drop down event will be fired and then you land on the Fixtures.aspx page again instead of Results.aspx.
I assume it is not a bug and I am missing something in here. I tried Response.Redirect("~/pageurl.aspx",false) as well but still it cause the same sort of problem .
I am using an asp.net autopostback enabled dropdown list. Here i want to restrict the autopostback property fot the value "Select" in the ddl. I have used javascript for this purpose. but not working.My code look like this.
I have created a custom control in ASP.net which includes a DropDownList with AutoPostBack set to true. I have also attached an event SelectedIndexChanged for the control.But I find that the event is not fired. Where as normal asp.net DropDownList with AutoPostBack set to true will fire the event. I am using .net 3.5 version in VS2010.
i m facing a issue in my code i m calling a user control which is in master page, and in row databound i m calling it and it is working fine but on select index change of checkbox it is not working
Check box's event CheckedChanged is not firing when uncheck the check box :This checkbox will help in checking the checkbox list and whne uncheck it will uncheck the checkbox list.I am using AJAX for this page post backs.Here is the html code for check box:
I have a grid view which populates data just for viewing purpose(report) . One field shows the Active/inactive status for which I am showing a checkbox..if data in database is 1 then the checkbox will be checked otherwise it'll not be checked. This field is inactive so that the User does not check/uncheck it. The issue is that this field cannot be sorted. All the fields in the gridview are being sorted.
I have a datagrid which is bound to a stored procedure in the code behind. This works fine. But the datagrid contains a checkbox which I need to be default checked. First I didn't bind the checkbox and just used:
I'm working on a simple demo project so that I can learn some things about ASP.NET's AJAX capabilities. My problem is that I can't seem to get an UpdatePanel to work properly with a CheckBox inside of it. Here is the markup I'm using in my .aspx file:
I have the following validation which is working fine for the rest of my fields, but trying to get a custom validator to work as part of the validation summary for a checkbox but no joy.
This is what I have at the moment
<script language="javascript" type="text/javascript"> function ValidateTandCs(source, args) { args.IsValid = document.getElementById('<%= optIn.ClientID %>').checked; } </script> <asp:ValidationSummary CssClass="highlight" id="ValidationSummary1" HeaderText="<p>Please amend these errors below to continue with your application.</p>" Runat="server" /> <asp:CheckBox id="optIn" runat="server"></asp:CheckBox> I agree to the terms and conditions of this site and I wish to Opt In for registration. <asp:CustomValidator ID="valTandCs" ClientValidationFunction="ValidateTandCs" ValidationGroup="ValidationSummary1" runat="server" ErrorMessage="Please accept Terms and Conditions before submitting."> </asp:CustomValidator>
But when I click submit I only see the error messages for my other fields and nothing for this checkbox..
I want to select all checkBox in Gridview when click to header checkBox.I have created design such that CheckBox is not available to header of Gridview.It is in other table. Below is design of gridview.
- How can I uncheck a checkbox using client side code when the other checkbox is checked? - Is there a way to check server side on form submission that at least one check box is checked?