Forms Data Controls :: How To Get The Values Of Checkboxes Which Are Dynamically Created
Feb 8, 2010
I am new to asp.net. I am trying to display some data from a database table using dynamic table in my page. I want to add checkboxes to a field in the database and would like to perform several tasks based on the values checked. The checkboxes are tied with the primary key field of the database. Here is the code snipet :
[Code]....
Now I have a button in my page. The functioanlity which I desire is on clicking that button I should be able to extract the values of checked checkboxes and perform some function.
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Similar Messages:
Nov 1, 2010
Does anyone know how to pass values from adynamically created gridview checkboxes to a crystal report?Is it possible? I am using asp.net, vb.net and mssql. Here's my grid minus a few boundfields:
<asp:gridview id="grid" runat="server" autogeneratecolumns="False" cellpadding="4"
forecolor="#333333" gridlines="None" emptydatatext="No Products registered for this company...">
<RowStyle BackColor="#EFF3FB" />
<Columns>
<asp:TemplateField HeaderText="Select">
<ItemTemplate>
<asp:CheckBox ID="chkSelect" runat="server" onclick="javascript:HighlightRow(this);" AutoPostBack="True"/>
</ItemTemplate>
<HeaderTemplate>
<input id="chkAll" onclick="javascript:SelectAllCheckboxes(this);" runat="server" type="checkbox" />
</HeaderTemplate>
</asp:TemplateField>
<asp:BoundField DataField="aid#" HeaderText="AID#" />
<asp:BoundField DataField="brandname" HeaderText="Brand Name" />
<asp:BoundField DataField="exp_date" DataFormatString="{0:MM/dd/yyyy}" HeaderText="Exp. Date" />
</Columns>
</asp:gridview>
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Jan 4, 2011
I am creating a project that dynamically creates radiobuttons. So far, i'm done with creating those radiobuttons dynamically. My problem is getting the values from those radiobuttons. To get those values, I need to click the submit button, however it seems that the radiobutton value or the radiobutton itself is lost after I click the submit button.
here are my codes, though not my exact codes, it follows the same logic...
protected void Page_Load(object sender, EventArgs e)
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May 6, 2010
Im basically listing a set of facilities in a datagrid. Like so:b Projectorcb Laptopcb TelevisonIn roomview, a check appears where a facility is availble in a room. This part works fine.The user can then edit the facilities, by clicking on the check beside each facility. When the update button is pushed I need to record the value of the checkbox, however I cant get the value of the checkbox.eres my codebehind:
[Code]....
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Sep 28, 2010
I'm creating an quiz application which queries the database and extracts the questions and choices. I use dynamically created controls such as a checkbox list and fill the values dynamically. How do I do this? Right now I have these functions:
array_random_init(); this creates a 10 element integer array from 1-20 - extract_question(i): this extracts a question indexed at i in DB, I created the controls and set the appropriate text in this function. - validate_question(i); this is called by button_click and validates the question i according to DB.
I understand I have to recreate the controls in Page_init on postback, but what should it look like? Do I need to add "if IsPostBack" in page_init, or do I create the controls in page_init() and reset their properties in page_load when I use extract_question(i)? Also, I cannot seem to clear the selected boxes on postback, I added page directive "enableviewstate=false" but it doesn't work.
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Oct 4, 2010
I am using asp.net/c# application. In my application, I have a gridview.<asp:GridView id ="gv_QuestionList" runat="server"> </asp:GridView>In Code Behind, I created dynamic textboxes and DropDownLists on RowDataBound.
[Code]....
I have a Save button out side the gridview which stores all the row values into database. when I click the "Save" button, I lost dyanamically ceated controls like textbox,dropdown and values (on postback).How can i get all the dynamically created controls and values after the post back?
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Apr 27, 2010
I've dynamically created 3 checkboxes as you can see in the code below. I also wrote an event handler below. When I run the code, the 3 checkboxes show up, but the event handling does not work right. Whenever there is postback from any of the 3 checkboxes, Label1 reflects the state of checkbox #3, no matter if I toggle checkbox #1 or #2. I put the code I have under Page_Init into Page_Load instead, but makes no difference either way.
The bottom line is, I want the event handler to know exactly which of the 3 checkboxes is firing the event so that Label1 can reflect that.
[Code]....
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Sep 21, 2010
I have a form that does a loop to create checkboxes. Here is the code in the loop:
LeftPosition+=120;
cbxDrives.Top = TopPosition;
cbxDrives.Left = LeftPosition;
cbxDrives.Text = d.Name;
CheckBox cbxDrives =
new
CheckBox();this.Controls.Add(cbxDrives);
This creates multiple check boxes on the form, and this works fine.
However, in the code behind for my button that the user clicks to execute the form, I cannot figure how how to read the values for the checkboxes. I've tried:
foreach (CheckBox cbxDrive
in cbxDrives)
{
}
but cbxDrives is not recognized.
I need to read through all of the checkboxes to see their values, so that the appropriate actions can be performed in the code behind.
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Jun 2, 2010
i have an array of buttons added to a panel control and need to reset them to their original values, is this possible pragmatically?
protected void Page_Load(object sender, EventArgs e)
{
RenderTable();
}
[code]....
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Jun 11, 2010
My problem is:
I've got a table, dynamically created, fill with a lot of dropdownlists witches IDs are dynamically created.
When a button is pressed, I need to scan all controls in the table and save their value.
But after the postback I can't no longer access to the table.
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Dec 29, 2010
I´m developing a database driven asp.net 4.0 application and are currently stuck with the following issue.
I need to dynamically add checkboxes using code behind. These checkboxes represent activities that the user may chose from by ticking the ones that they are interested in. I do not know the number or which activities that should be presented until runtime so hard coding checkboxes is not an option.
On the client side I need to keep track of which checkboxes/activities the user have chosen as I need to calculate the cost for these without doing a postback. I would like to use javascript to find out what activities that are chosen and also calculate the total cost using javascript.
To implement this I tried to use Page.ClientScript.RegisterExpandoAttribute (server side) and javascript (client side, but I do not manage as ticking any of the checkboxes will not fire a client side event. I´m also using Telerik RadPanelBar controler.
Below is my current not working implementation:
Code behind/aspx.cs
public override void DoLayout(Aranea.Common.EntityDOL.ProjectRegistration existingRegistration)
{
base.DoLayout(existingRegistration);
lblCaption.Text = "Payment page";
//Get collection
TrackableCollection<ProjectActivityBooking> acitivities = existingRegistration.ProjectParticipant.ProjectEntity.ProjectActivityBooking;
//Add datasource and bind
this.RadPanelBar1.ItemDataBound += new RadPanelBarEventHandler(itemDatabound);
this.RadPanelBar1.DataSource = acitivities;
this.RadPanelBar1.DataBind();
this.lblTotalBooked.Text = "Total Booked " + decimal.Round(totalBooked, 2).ToString();
}
void itemDatabound(Object sender, RadPanelBarEventArgs e)
{
decimal totalActivityPrice = 0;
//Get panelItem
RadPanelItem item = (RadPanelItem)e.Item;
//Create Checkbox
CheckBox chk = new CheckBox();
chk.ID = "box";
//create label
Label lbl = new Label();
//Get Activity
ProjectActivityBooking activity = item.DataItem as ProjectActivityBooking;
//trying to register my checkboxes
Page.ClientScript.RegisterExpandoAttribute(this.validator.ClientID, "ClientID", chk.ClientID);
//Get total activity price
totalActivityPrice = GetActivityPrice(activity);
//Get total booked
totalBooked += totalActivityPrice;
lbl.Text = totalActivityPrice.ToString();
//Set activity name
chk.Text = activity.ProjectActivity.ActivityName;
chk.TextAlign = TextAlign.Left;
//Add controls
item.Controls.Add(chk);
}
Client side code:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="PaymentPage.ascx.cs" Inherits="CX.Aranea.Client.WebFront.UserControls.RegistrationForm.Payment.PaymentPage" %>
<%@ Register assembly="Telerik.Web.UI" namespace="Telerik.Web.UI" tagprefix="telerik" %>
<%@ Register Src="~/UserControls/CxStandardControls/CxLabel.ascx" TagPrefix="cx" TagName="Label" %>
<telerik:RadPanelBar runat="server" ID="RadPanelBar1" Width="400px" Height="30px"
Skin="Forest" ExpandMode="MultipleExpandedItems" ExpandAnimation-Type="InElastic" >
<Items>
<telerik:RadPanelItem Text="root" Expanded="false">
<ContentTemplate>
</ContentTemplate>
</telerik:RadPanelItem>
</Items>
</telerik:RadPanelBar>
<cx:Label ID="lblCaption" runat="server" />
<asp:PlaceHolder ID="plhChildren" runat="server"/>
<asp:Label ID="lblTotalBooked" runat="server"/>
//My custum validator
<asp:CustomValidator ID="validator" runat="server" ClientValidationFunction="validation"></asp:CustomValidator>
<script type="text/javascript" language="javascript">
function validation(source, arguments) {
var chkBox = document.getElementById(source.ClientID);
if (chkBox.checked == true) {
alert("This should work");
}
}
</script>
I´ve been stuck with this for some time now and have a nice deadline coming up :) I would be most thankfull if anyone could point me in the correct direction as I feel a bit clueless. Perhaps there is a much easier way of solving this? Perhaps my code is all wrong?
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Mar 17, 2011
I'm trying to check dynamically generated "checkbox" value inside Listview.
I can reference non-dynamic checkboxes exact in same location (index) inside Listview using "e.Item.FindControl", however I can't reference dynamic checkboxes.
Here is my code.
[Code]...
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Aug 12, 2010
I have Grid view control in the page. Enable paging option is true.
Columns in the Grid view are ID, Name, Checked and Email
Whenever user selects the check box then I am showing txtEmail in the Email columns so that I can enter email id in the textbox.
Like this I am selecting checkboxes and entering values in the txtEmail when I go to next page and comes back. Then these entered values are cleared.
How to keep the textboxes values and checkboxes selected during paging?
I have been doing R&D for 1 day. Tried to implement.
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May 10, 2010
Should I use the SQL Server bit data type or a simple varchar where the user would enter "yes" or "no"? More importantly, how wold I go about checking these checkboxes in the listview based on the values stored in my sql server database?
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Nov 17, 2010
Im dynamically creating several dropdowns onclick of a button... but the dropdown returns null when im trying to get the values on submitting the form... i read tat during postback all dynamically created controls will be lost... s there a way to register the controls... i want to access the item selected in the dropdown .... expecting a positive reply...
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Feb 4, 2010
I have a Webcontrol, that I create completely dynamically and it contains radiobuttonList. How can I acces this radibuttonlist values, on pages where I register this control?
public class MyControl: WebControl
pnContainer = new Panel();
rbl = new RadioButtonList();
liResume = new ListItem("Resume", "Resume");
liReopen = new ListItem("ReOpen", "ReOpen");
rbl.Items.Add(liResume);
rbl.Items.Add(liReopen);
pnContainer.Controls.Add(lblReOpenTitle);
pnContainer.Controls.Add(rbl);
this.Controls.Add(pnContainer);
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Feb 1, 2011
I am using VS 2005.I have 5 tables depending on their values ,I need to draw a bar chart.
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Dec 1, 2010
What I am trying to achieve:I am trying to take the value of the selected index and depending on what this value is (e.g. the case selection in the code below) run a different query on the dataset and then create a repeater control dynamically to output each row with an item template
that I can use css to style.
In other words: When a user choses a list item it shows only rows from the dataset that match the list item chosen. For example if a user choses Closed Tickets they only see rows from the dataset that have a STATUS of 'CLOSED'.
What I have done so far: [Code]....
What I'm struggling with at the moment is:
1) That the case selection works but the selection of the appropriate data from the dataset doesn't seem to be happening. And this data isn't getting stored in rows as I had hoped.
2) I'm not sure entirely how to display the dynamically created repeater control in the admin.aspx page.
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Jun 29, 2010
I have a page that I am creating 5 separate GridViews on, depending on the button the user clicks, a different GridView will show up. On a few of the GridView's there is a need for paging, so in the CodeBehind I did the following
billingGridView.ID = "BillingGridView"
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Nov 1, 2010
I have created one user control in which I have taken a gridview. Columns of this gridview are getting generated dynamically. (i.e. I read Column name from Xml file) But now I want my first coloumn of this gridview as a checkbox field.
I am giving my code snippet for reference.
This is function to create Grid.
[Code]....
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Jan 11, 2010
I have a database with some data in. Now I'm trying to show that data on my page whit a ListView.
For each object from the database a ListView will generate a dropdownlist.
I also have a DataPager on my page and this is where the problem occurs.
Each object generated from the database has a field that may look like this example.: 1,2,3.
In my code now I´m trying to split this string of comma character and add new items to my dropdownlist.
This works as long as I do not have DataPager on. But if I choose to view an x number of pages at the time when the page loads, I have value in the dropdownlists, only on my first page.
A piece of my code:
[Code]....
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Mar 4, 2011
I want to create a gridview with the first column being the Job Number and then a variable number of subsequent column which are fordates. This grid is a data entry for hours worked on a particular date for a particular job. I wrote the code to get the correct number of columns and column headers but I am having trouble getting textboxes into the grid cells.
public partial class _Default : System.Web.UI.Page
{
#region constants
[code]...
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Jan 10, 2011
i am working on Accounting software.in this software i am to implement voucher entries form.In this form on page load a table (two rows and four columns) should be created after that one row should be appended to that table dynamically on button click event.
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Aug 9, 2010
I have a listview control which is created dynamically, it is nested inside a repeater's itemtemplate. I'm trying to attach a datapager to it, which is also created dynamically but the datapager will not display and the listview will just display all its records in its entirety.
[Code]....
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Mar 15, 2011
I have a menu. I use the menu's menuitemclick event to create a gridview (several actually) that is then added to a panel for display.The gridview paints perfectly until I try to add paging.I have successfully used paging and sorting declaratively for years, but this is my first attempt to do everything in code.When the gridview tries to databind, it throws an error:
[NullReferenceException: Object reference not set to an instance of an object.]
System.Web.UI.WebControls.GridView.get_StateFormatter() +25
System.Web.UI.WebControls.GridView.BuildCallbackArgument(Int32 pageIndex) +56
[code]...
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