Web Forms :: Retaining Checkbox Value After Postback?

Nov 25, 2010

I created checkbox in a gridview. I hope to retain the checkbox value after postback.


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Similar Messages:

.net - Checkbox Within Datagrid Retaining Checked Value On Postback In VB.NET But Not C#?

Feb 24, 2011

I have a project in VB.NET which is working fine which essentially has a Datagrid that has a TemplateColumn included which is a column of Checkboxes. The code to declare the datagrid is here...

<asp:datagrid id="dgDates" OnItemCommand="gridEventHandler" BorderColor="Black" BorderWidth="1px"
CellPadding="3" runat="server" AutoGenerateColumns="False" HorizontalAlign="Left" AllowSorting="True"
OnSortCommand="SortData" OnItemDataBound="gridItemDataBound">
<HeaderStyle Font-Underline="True" Font-Bold="True" HorizontalAlign="Center" ForeColor="Black"
<asp:BoundColumn DataField="strParameterName" SortExpression="strParameterName" HeaderText="Parameter Name"></asp:BoundColumn>
<asp:BoundColumn DataField="dtParameterValue" SortExpression="dtParameterValue" HeaderText="Parameter Value"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="Constant" SortExpression="blnStatic" ItemStyle-HorizontalAlign="Center">
<asp:CheckBox ID="cbStaticRolling" Checked="False" Runat="server" AutoPostBack="true"></asp:CheckBox>

as you can see the Checkbox has Autopostback="true" but there are other things on the page which produce postbacks as well.

My Page_load has this in it, being called on every load of the page, postbacks included...

Dim strGUID As String
strGUID = Session("strGUID")
dgDates.DataSource = SqlHelper.ExecuteDataset(ConfigurationManager.AppSettings(Web. [Global].CfgKeyConnStringADMIN), "dbo.spRptGetSchedulingDates", strGUID)
intNumberOfDates = dgDates.Items().Count

as well my code behind has the following code for the gridItemDataBound

Protected Sub gridItemDataBound(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.DataGridItemEventArgs)
'hide the intRptSchedulingDatesID for each row in the checkbox's content style variable
If (e.Item.ItemType = ListItemType.Item Or e.Item.ItemType = ListItemType.AlternatingItem) Then
CType(e.Item.FindControl("cbStaticRolling"), CheckBox).Style("Content") = CType(e.Item.DataItem, System.Data.DataRowView).Item("intRptSchedulingDatesID")
End If
End Sub

everything you see sbove is working perfectly fine...in the sense that when I click one of the checkboxes, the page_load fires, the gridItemDataBound fires on DataBind() and when all is done, the checkbox retains the value that the user clicked the checkbox.

With all this exact same code converted to C#....the events all fire in the same order, but the checkbox selected value always clears...any thoughts??

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Web Forms :: Value Not Retaining On Postback

Feb 2, 2010

I have a name textbox, label, usercontrol, submit button in my page inside a master page. when the button is clicked iam using the label to show the user "Please enter name". But any postback happens inside the user control then this lable gets cleared, how to retain the value on the postback of the user control.

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Web Forms :: Retaining Data In Control On Postback?

Jan 19, 2010

i have a <input id="FILE_UPLOAD".....................> file upload html control in my asp.net web applicationwhen a post back occurs the data entered in the control gets lost . how do i retain the data entered

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Web Forms :: RadioButton - Dynamically Created Not Retaining Checked Value After Postback

Jan 13, 2011

I have a couple of RadioButtons that are created dynamically. But after postback they don't retain their checked property. I also have some CheckBoxes and they work just fine using the same mechanism (code below). I have narrowed down the problem to the "GroupName" property. If I remove it, it works just fine. But I need the RadioButtons to be mutually exclusive.


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Checkboxlist Not Retaining Selection After Postback In IE?

Aug 1, 2010

Platform: ASP.Net 2.0 I have multiple checkboxlist controls on a webpage. Along with that i have the same number of buttons on that page. Initially all the checkboxlist controls are hidden. When user clicks on a button, corresponding checkboxlist controls gets visible making others hidden and allows user to select the options.

On postback, if user clicks on the same button again, the corresponding checkboxlist gets visible but the item selection is not retained. However, this happens only in IE. This works fine in FireFox. I am using JQuery to toggle the visibility of checkboxlist.I guess the problem is because i am toggling the visibility of checkboxlist which IE doesnt seem to like. What is the solution to this problem?

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Retaining PreviousPage Information After Postback?

Jul 29, 2010

I'm using the asp.net PreviousPage functionality and cross-page postback. The problem i'm running into is that if I have any postbacks on my page, the PreviousPage information seems to be lost. I don't want to put it in ViewState because that will be quite large. I've thought about Session, but I don't want the data to persist after i've moved on to another page, and I really don't like the idea of putting code in all my other pages to delete old session variables.

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.NET DropDownList Not Retaining Selected Item On Postback?

Nov 15, 2010

I have a ASP DropDownList that gets populated on the Page_Load event, after i select an item and hit a button the selected item gets cleared and the first item in the DropDownList gets selected. (The DropDownList is only populated when the page is not postback)

if (!IsPostBack)
List<Country> lCountries = new List<Country>();
List<CompanySchedule> lCompanySchedules = new List<CompanySchedule>();

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C# - ViewState ["sample"] Variable Not Retaining Value On Postback In A Composite Control?

Oct 18, 2010

I have created a composite control with sample details as follows. Basically, the first time on page load the control sets a view state variable and the problem is that on post back (when the button is clicked), the ViewState variable is null. I have researched extensively and I am not able to find a solution. I checked all the Microsoft recommended articles and also from other developers. This approach seem to work for everyone

PS: This code may not work as it is only for illustrative purposes. but this is exactly what i'm doing in my code.

Public class Test : CompositeControl
private Button btnTest = new Button();
public string TestViewState[code]....

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Web Forms :: How To Checkbox Postback In Javascript Disable

Feb 2, 2011

I need code to work in javascript disable for postback of checkbox. As i know with lots of google search that it is not possible..

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Forms Data Controls :: How To Highlight Checkbox Without Postback

Jan 18, 2010

I want to highlight every rows in the gridview when the checkbox is selected without posting back to the server. ?

I also want to know how to make a webmail like Gmail, Yahoo.

I want my gridview to redirect to when the row is clicked but excluding the click in checkbox.

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Web Forms :: CheckBox Oncheckedchanged Event Causing Strange Behavior On Postback?

Jun 11, 2010

I have an issue that seems to only happen on my production server. I show or hide table rows whenever the buttons are clicked. However, when I do a postback on the checkbox, all of the rows become visible and the textbox stays empty. It works correctly on my test server and local workstation, just not in production.

Here is the markup...


Here is the code behind...


Here are the unexpected results whenever I check the chkShow2 checkbox... I am guessing this is a configuration issue on the server.

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Forms Data Controls :: Dynamically Created Checkbox In GridView Are Lost In The Postback?

Mar 3, 2010

In design time I created a Gridview and a delete button in a page test.aspx:


The program stopped at statement "if ((row.Cells[COL_INDEX_SELECTED].Controls[0] as CheckBox).Checked)",

because it cannot find the checkbox created before.

I tried to shift all the code in Page_Load to Page_Init, but the ticked checkboxes are still lost.

I could find the ticked checkboxes names in its request object parameters(this.Request.Params.AllKey) if I setup a breakpoint on the error statement.

Does anyone konw what's happening and how to retrieve the selected rows?

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C# - How To Access The Value Of A Checkbox Without A Postback

Jun 16, 2010

I have a radgrid controlling access to an application for users. There are two columns, a 'name' column and a checkbox 'access' column representing their current access permission. the checkboxes are populated from a database. I would like the to change the checkboxes to grant or deny access to the users I specify. Since there are alot of users I would like to make multiple changes and use a submit button to write the changes to the database. I do not want to postback with each checkbox change and wait for the page to "blink". My problem is that with the checkbox postback disabled, when I click submit, the value of the checkboxes are not registering the changes I make. I need a way to access the current client-side state of the checkbox or some workaround to accomplish this.

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Javascript - How To Delay Checkbox Postback

Sep 27, 2010

I have an ASP.NET page with Javascript. I have some checkboxes and I want to give the user time to check and uncheck more then one box before the postback... so when the user tick/untick a check box the postback happens after 5 seconds. How can I do this? tryed different methods found online but all incomplete or wrong.

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Checkbox Losing Value On Postback Due To JavaScript / JQuery Array?

Feb 1, 2011

I have a simple asp:RadioButtonList within a form tag but for some reason it isn't keeping it's value on postback

Here's what I've got


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VS 2010 - GridView With CheckBox In Each Row - Button To Select / Deselect All And Not Postback

Aug 12, 2011

I have a gridview with a checkbox in each row for selecting. I want to have a button which will select all/deselect all and not post back.

I first implemented this with a link and it works perfectly, but I don't like how it looks.

<a href="#" onclick="javascript:sel();">Select/deselect all</a>

<script type="text/javascript">
isSelected = false;
function sel() {
var frm = document.forms[0];
isSelected = !isSelected;

[Code] ....

So now I have a button that I want to rig up to execute this javascript. Which I believe would be done this way:

<asp:Button ID="btnSelectAllSummary" runat="server" Text="Select All" OnClientClick="javascript:sel()" />

But it is posting back. How do I prevent the postback and have it execute on the client?

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How To Force The User To Have At Least One Selected Checkbox And Postback From Client-side JavaScript

Jul 8, 2010

I have two checkboxes: cb1 and cb2. They are both hooked up to an onClick event which checks if at least one checkbox is clicked. If this is not the case, it throws an alert and reverts the change. If a legal change was made (e.g. cb2 was checked, followed by cb1 being unchecked), the function calls the server function checkChange() which needs the object and eventargs.

I'm having trouble with the following:

Reverting the change: how can i find out which checkbox was clicked without adding an extra javascript function for the second checkbox? This has to be a scalable solution as more checkboxes may be added later.
How do I call the server function checkChange(). I am aware of "this.Page.GetPostbackEventReference" but I am confused as to the parameters it takes.

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Data Controls :: Invalid Postback Or Callback Argument / Error Is Generated On Clicking Checkbox

Apr 13, 2013

I am getting the following error on on clikcing checkbox from checkbox list in my project.


Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

If i set <pages enableEventValidation="false"/> then on clicking the submit button the information is not saved in database just page is refreshed.

aspx.cs file code:

protected void btnSubmit_Click(object sender, EventArgs e) {
if (con.State == ConnectionState.Closed) {
SqlCommand cmd = new SqlCommand(@"insert into MainTable values(@CollegeName,@AffilatedWith,@CollegeType,@Country,@City,@State,@EstablishmentYear,


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Web Forms :: Retaining + Sign In Querystring?

Dec 16, 2010

I have a querystring created that contains + character. This is not a space character but an actual + sign in an encrypted string. Below is one example...


My code when reads above QS, I am losing + character in it if I use URLDecode. If I remove URLDecode, and just read as Querystring method, I lose the '=' character... and it gets replaced by %3d or like charcters...

What I am looking for is to save above QS in a variable... the way it is.. PAXGR52H8SS4bSWTn+HyZg==

How can I save QS as is in a variable?

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Web Forms :: Radiobutton Not Retaining Its Checked Status Set?

Jan 28, 2010

I am trying to set the checked status of a radiobutton in code, but it doesnt retain after the code-behind execution completes. It still shows the design time checked status.

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Forms Data Controls :: Retaining A Value In Fileupload Control?

Nov 22, 2010

I have two fileupload controls in footer of gridview with their corresponding checkboxes.

The autopostback property is set to true for both the checkboxes. Now after uploading file on one fileupload when i check the second checkbox, it detains(losses) its value.

How can i retain the value of first fileupload control on postback

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Web Forms :: Site Navigation And Retaining User Selections?

Feb 17, 2010

handle site navigation and retaining user selections.

On Page 1:

I am using an <asp:ListBox as a filter for an <asp:GridView (gv.datasource=myobj.getdata(lb.selectedvalue))

This functions as expected and the gridview pagination functions as expected.

Each row on the grid provides an <asp:HyperLinkField to navigate to another page (Page 2).

This functions as expected.

On Page 2:

This provides functionality to perform some data creation/manipulation tasks.

It also provides a link to navigate to another page where other tasks can be performed (Page 3).

My query is in relation to returning from Page 3 to Page 2 to Page 1.

I would like to be able to return from Page 3 to Page2 to Page 1 and display earlier selections.

Currently, I am using a combination of querystring parameters and sessions vars on each Page_Load to achieve this.

Q1: What are the recommended ways to achieve this?

Q2: Is it possible to dynamically specify url parameters on a sitemap?

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Forms Data Controls :: Selected Value Not Retaining In Dropdownlist In Gridview?

Jan 19, 2010

I have a Grid on my page.When the page is loaded for the first time ther is a list of records displayed in the grid.When I edit the record by edit link button,the ddl saves the change value .

The same thing if I do when searching for a particular record and then editing and changeing the dropdownlist value,the page postbacks and the new value gets replaced with the old value that was present earlier.

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State Management :: Retaining Data On Partially Filled Out Forms?

Oct 13, 2010

Is there a way for a user to partially fill out a form and not commit it to the database, leave the page and come back to it and the information that the user filled out is still there?

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