RadComboBox with checkboxes

[berto]

I implemented this successfully, i have only issue with error handling if no checkbox will be checked. Any suggestions how the easiest I can solve this issue?

[Nencho]

Hello Adnrej,

Could you elaborate a bit more about the scenario you are trying to achieve? Do you mean to implement a validation if there are no items checked in RadComboBox?


Regards,
Nencho
the Telerik team

[berto]

Yes, this is exactly what I need. I have to be sure that at least one item will be checked.

[Nencho]

Hello Andrzej,

In order to implement the desirable validation, you could perform a verification if there are any items checked with the client method get_checkedItems of the RadComboBox object, or you could check if the CheckedItems.Count is greater than 0 at server side. Please consider the following approach implemented at client side, at the event handler of an RadButton, considering there are two RadComboBoxes to validate:

function onClientClicked() {
            var noErrors = true;
            var label = document.getElementById("label");
            for (i = 0; i < 2; i++) {

                if (Telerik.Web.UI.RadComboBox.ComboBoxes[i].get_checkedItems().length < 1) {
                    noErrors = false;
                }
            }
            if (!noErrors)
                label.textContent = "Fill all RadComboBoxes";
            else
                label.textContent = "";
        }

All the best,
Nencho
the Telerik team

[Matt]

I'm trying to use JQuery to get the value of a specific checkbox but I can't find any documentation for get_checkedItems() for a RadComboBox anywhere.

Could you post a working link to it??

[A2H]

Hello,

Please use the below code to find checked items of combobox in client side

var $ = $telerik.$;

function validate(sender, eventArgs)
{
        var combo = $find("<%= RadComboBox3.ClientID %>");
        if (combo.get_checkedItems().length < 1) {
      alert("Please select atleast one item");
     }
}

For reference please check the below link
1) ClientSide Basics
2) RadComboBox Object


Thanks,
A2H

[A2H]

Hello,

Please use the below code snippet to find the checked items in combobox on client side

var $ = $telerik.$;
            function validate(sender, eventArgs) {
                var combo = $find("<%= RadComboBox3.ClientID %>");
                if (combo.get_checkedItems().length < 1) {
                    alert("Please select atleast one item");
                }
            }

Please refer this link for reference

Thanks,
A2H