Controls :: Validate DropDownList CheckBox List Server Control Using JavaScript

May 7, 2015

How to validate DropDownCheckBoxes control at client side(javascript or Jquery)? I would like to restrict the user to submit the page if no item is selected in the dropdowncheckboxes control. i.e no check box is checked.Javascript/Jquery code to validate the control at client side.

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Oct 12, 2010

n my aspx page i am having a checkbox list ..It has binded values from a table..
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var checkBoxCount = 0;
var elements = document.getElementById('<%=ChkBoxList.ClientID%>');
for(i=0; i<elements.length;i++)

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Aug 31, 2010

ASP.NET3.5 Webforms. Am trying to put a validator on the drop down list, only if the checkbox is checked.

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<script language="javascript" type="text/javascript">
function setVal(sender) {
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May 5, 2010

I want to validate checkbox list, i am using this strategy which is mention in this lik given below

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Jun 22, 2010


when i use it on a empty webform it works nicely, however when i use it in a ListViews InsertItemTemplate it does not.get an error aying document.GetElementById is null and stops elowdocument.getElementById("CheckBoxListStr_0").checked = false

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I am using javascript to validate user input on my aspx page. I am easily able to validate textboxes and dropdown list for differenet scenarios.

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function validateService(source, args)
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Update(Additional Information): The static property is read-only so it cannot be tampered with from the page.

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I have a situation where I want to show the selected records out of total records for a product of an employee

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I have <asp:Button ID="btnDelete" ..../> and <asp:DataList ID="lstOrder"..../>

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I have a checklistbox like this :

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I am binding a checkboxlist with a dataset (with these columns :
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Is it possible to disable the checkbox and still have the server side recognize it as checked?

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i have 20 checkboxes in usercontrol ... i wanna do whole coding in user control ...

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I've set up a page that uses JavaScript to hide or show rows in an HTML table, depending on the state of a checkbox.

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way I can do this but have the validation controls not do anything if that row is hidden?

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