In ASP.NET CheckBoxList is there any way to determine of a particular checkbox is checked using jquery? I need to know if "All" is checked for example, either by value or label text.
<asp:CheckBoxList ID ="ToyotaModels" runat="server">
<asp:ListItem Value = "0">Corolla<asp:ListItem>
<asp:ListItem Value = "1">Matrix<asp:ListItem>
<asp:ListItem Value = "2">Tundra</asp:ListItem>
<asp:ListItem Value = "3">Prius</asp:ListItem>
<asp:ListItem Value = "4">All</asp:ListItem>
</asp:CheckBoxList>
This should get the checked checkboxes on a click:
$('input:checked').click().each(function() {
//process the checkbox stuff here..
});
EDIT: based on comment
function processChecks()
{
$('input:checked').each(function()
{
alert($(this).val();
});
};
You have to look at the HTML generated by ASP.NET's CheckboxList. The ID of the container for the inputs which are the check boxes is going to look like this in javascript:
<%= ToyotaModels.ClientID %>
Each checkbox input has _X appended to the ID where X is the numeric checkbox. So to find whether the first item (Corolla) is checked you can do this:
$('<%= "#" + ToyotaModels.ClientID + "_0" %>').is(":checked")
In jQuery you have .is(":checked") function that should do the trick.
Related
On my homepage (web form) I have 3 radio buttons to select from. How do I format a hyperlink to direct the user to that page and automatically select a radio button?
<div class="col-lg-3">
<asp:RadioButtonList ID="rdbtnChoise" Font-Size="11" ToolTip="Select a service: A description of the service is listed under each title once selected." runat="server" OnSelectedIndexChanged="rdbtnChoise_SelectedIndexChanged" AutoPostBack="True">
<asp:ListItem Value="1" Text="G1"> OPTION 1</asp:ListItem>
<asp:ListItem Value="2" Text="G2"> OPTION 2</asp:ListItem>
<asp:ListItem Value="3" Text="G3"> OPTION 3</asp:ListItem>
</asp:RadioButtonList> </div>
I would like to set a hyperlink to automatically select the first radio button. I've tried by reading other questions like this one but none seem to work.
Let's say my webpage is: https://examplesite.com
From your question, your problem is how to provide a link to a page, when a user navigate through that link will check the first radio button once rendered
If my understanding is correct
you can use js to achieve this
assuming you have jquery included
on your radio button page, add below
<script>
$(function(){
var isCheck = getParameterByName("isCheckRadio") === 'true';
if(isCheck){
$('input:radio[name="rdbtnChoise"]').first().prop("checked", true);
}
});
function getParameterByName(name, url) {
if (!url) url = window.location.href;
name = name.replace(/[\[\]]/g, "\\$&");
var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"),
results = regex.exec(url);
if (!results) return null;
if (!results[2]) return '';
return decodeURIComponent(results[2].replace(/\+/g, " "));
}
</script>
which means when page load, if the url has querystring isCheckRadio value as true, check first radio
then the url you provided will be something like
link
How to get the textbox value on code-behind after the textbox value assigned on a modal-box?
This is how the modal-box appear on the page:
<div id="dialog-form" title="Modal Box">
<asp:TextBox ID="Textbox1" runat="server" ReadOnly="True">
<asp:Button ID="Save_Button" runat="server" Text="Save"></asp:Button>
</div>
In order to assign the value on Textbox1, I attach a Javascript function to the LinkButton on a Gridview (the code not showed here) through code-behind based on the LinkButton clicked:
Dim myLinkButton As LinkButton
For i As Integer = 0 To GV1.Rows.Count - 1
myLinkButton = DirectCast(GV1.Rows(i).Cells(1).FindControl("LinkButton"), LinkButton)
myLinkButton.Attributes.Add("onclick", "shopModalPopup('" + .Rows(i).Cells(0).Text & "'); return false;")
Next
Rows(i).Cells(0) is the first column on the Gridview, it is "ID". This ID will be assigned to the Textbox1 while the Linkbutton clicked.
The Javascript code is on the same page as the Gridview code:
<script>
var grid_modal_options = {
height: 450,
width: 550,
modal: true
};
function shopModalPopup(id) {
var DataField = id;
grid_modal_options.open = function () {
$('#dialog-form #Textbox1').val(DataField);
};
$("#dialog-form").dialog(grid_modal_options);
$("#dialog-form").parent().appendTo('form:first');
}
</script>
When I clicked the Save Button on the modal-box, the value on the Textbox1 can't catch on the code-behind. It always return null value. How to do that? Thank you very much.
please read this
http://www.codeproject.com/Articles/37090/JQuery-UI-Dialog-with-ASP-NET-empty-post-values
i think it might help you the problem might be that the div of dialog is moved outside the form you can solve it by using reference above or just defining another hidden input and update the hidden input with the same value
$('#dialog-form #Textbox1').val(DataField);
$('hiddenfield').val(DataField);
and then read the value from the hidden field
not sure if it the best answer but might work as a quick fix
Does it work without Readonly="true"? If so, in your <asp:textbox>, replace Readonly="true" with Enabled="false".
I haven't tested this, but i recalled Readonly causing me issues like this in the past.
Hey I have a radiobuttonlist and trying to set one of the radiobuttons to selected based on a session variable but proving impossible.
<asp:radiobuttonlist id="radio1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="RadioButtonList1_SelectedIndexChanged">
<asp:listitem id="option1" runat="server" value="All"/>
<asp:listitem id="option2" runat="server" value="1" />
<asp:listitem id="option3" runat="server" value="2" />
</asp:radiobuttonlist>
I.e How can I set option2 to selected in code behind ?
The best option, in my opinion, is to use the Value property for the ListItem, which is available in the RadioButtonList.
I must remark that ListItem does NOT have an ID property.
So, in your case, to select the second element (option2) that would be:
// SelectedValue expects a string
radio1.SelectedValue = "1";
Alternatively, yet in very much the same vein you may supply an int to SelectedIndex.
// SelectedIndex expects an int, and are identified in the same order as they are added to the List starting with 0.
radio1.SelectedIndex = 1;
You could do:
radio1.SelectedIndex = 1;
But this is the most simple form and would most likely become problematic as your UI grows. Say, for instance, if a team member inserts an item in the RadioButtonList above option2 but doesn't know we use magic numbers in code-behind to select - now the app selects the wrong index!
Maybe you want to look into using FindControl in order to determine the ListItem actually required, by name, and selecting appropriately. For instance:
//omitting possible null reference checks...
var wantedOption = radio1.FindControl("option2").Selected = true;
Try this option:
radio1.Items.FindByValue("1").Selected = true;
We can change the item by value, here is the trick:
radio1.ClearSelection();
radio1.Items.FindByValue("1").Selected = true;// 1 is the value of option2
var rad_id = document.getElementById('<%=radio_btn_lst.ClientID %>');
var radio = rad_id.getElementsByTagName("input");
radio[0].checked = true;
//this for javascript in asp.net try this in .aspx page
// if you select other radiobutton increase [0] to [1] or [2] like this
i have a radiobuton list in which i am binding to my datat table. I am able to bind to a radiobuttonlist
I have the column [id, name]
by deafult name should get selected in radio button list .
now by default I need to select one radiobutton for the value in datatable
how to achive this concept here
thank you
<asp:RadioButtonList ID="RadioButtonList1" runat="server">
<asp:ListItem>One</asp:ListItem>
<asp:ListItem Selected="True">Two</asp:ListItem>
<asp:ListItem>Three</asp:ListItem>
</asp:RadioButtonList>
Try this to get an item by name or value :
radiobuttonlist.Items.FindByValue("your_items_value").Selected = true;
// or by it's text :
// radiobuttonlist.Items.FindByText("your_items_text").Selected = true;
Try the following:
radiobuttonlist.SelectedIndex=1;//the index of items in radiobutton in the list you want to select
If you want to Select by Text then try
radiobuttonlist.Items.FindByText("yourtext").Selected = true;
If u want to select by value then try
radiobuttonlist.SelectedValue = "12";
I just want an ASP.NET DropDownList with no selected item. Setting SelectedIndex to -1 is of no avail, so far. I am using Framework 3.5 with AJAX, i.e. this DropDownList is within an UpdatePanel.
Here is what I am doing:
protected void Page_Load (object sender, EventArgs e)
{
this.myDropDownList.SelectedIndex = -1;
this.myDropDownList.ClearSelection();
this.myDropDownList.Items.Add("Item1");
this.myDropDownList.Items.Add("Item2");
}
The moment I add an element in the DropDown, its SelectedIndex changes to 0 and can be no more set to -1 (I tried calling SelectedIndex after adding items as well)... What I am doing wrong? Ant help would be appreciated!
Bare in mind myDropDownList.Items.Add will add a new Listitem element at the bottom if you call it after performing a DataSource/DataBind call so use myDropDownList.Items.Insert method instead eg...
myDropDownList.DataSource = DataAccess.GetDropDownItems(); // Psuedo Code
myDropDownList.DataTextField = "Value";
myDropDownList.DataValueField = "Id";
myDropDownList.DataBind();
myDropDownList.Items.Insert(0, new ListItem("Please select", ""));
Will add the 'Please select' drop down item to the top.
And as mentioned there will always be exactly one Item selected in a drop down (ListBoxes are different I believe), and this defaults to the top one if none are explicitly selected.
I am reading the following:
http://msdn.microsoft.com/en-us/library/a5kfekd2.aspx
It says:
To get the index value of the selected item, read the value of the SelectedIndex property. The index is zero-based. If nothing has been selected, the value of the property is -1.
In the same time, at http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.dropdownlist.selectedindex(VS.80).aspx we see:
Use the SelectedIndex property to programmatically specify or determine the index of the selected item from the DropDownList control. An item is always selected in the DropDownList control. You cannot clear the selection from every item in the list at the same time.
Perhaps -1 is valid just for getting and not for setting the index? If so, I will use your 'patch'.
It's possible to set selectedIndex property of DropDownList to -1 (i. e. clear selection) using client-side script:
<form id="form1" runat="server">
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="A"></asp:ListItem>
<asp:ListItem Value="B"></asp:ListItem>
<asp:ListItem Value="C"></asp:ListItem>
</asp:DropDownList>
<button id="СlearButton">Clear</button>
</form>
<script src="jquery-1.2.6.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function()
{
$("#СlearButton").click(function()
{
$("#DropDownList1").attr("selectedIndex", -1); // pay attention to property casing
})
$("#ClearButton").click();
})
</script>
I'm pretty sure that dropdown has to have some item selected; I usually add an empty list item
this.myDropDownList.Items.Add("");
As my first list item, and proceed accordingly.
The selectedIndex can only be -1 when the control is first initalised and there is no items within the collection.
It's not possible to have no item selected in a web drop down list as you would on a WinForm.
I find it's best to have:
this.myDropDownList.Items.Add(new ListItem("Please select...", ""));
This way I convey to the user that they need to select an item, and you can check SelectedIndex == 0 to validate
Create your DropDown list and specify an initial ListItem
Set AppendDataBoundItems to true so that new items get appended.
<asp:DropDownList ID="YourID" DataSourceID="DSID" AppendDataBoundItems="true">
<asp:ListItem Text="All" Value="%"></asp:ListItem>
</asp:DropDownList>
Please try below syntax:
DropDownList1.SelectedIndex = DropDownList1.Items.IndexOf(DropDownList1.Items.FindByValue("Select"))
or
DropDownList1.SelectedIndex = DropDownList1.Items.IndexOf(DropDownList1.Items.FindByText("SelectText"))
or
DropDownList1.Items.FindByText("Select").selected =true
For more info :
http://vimalpatelsai.blogspot.in/2012/07/dropdownlistselectedindex-1-problem.html