How to show alert message when none of the checkbox items are selected in asp.net

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How to show alert message when none of the checkbox items are selected in asp.net

Posted 2-Oct-12 1:47am

cunny

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Sandeep Mewara · Answer 1 · 2012-10-02T02:05:00

Solution 1

Two ways:
1. Client side:
On page submit, button click have a defined client side onclick. In it, loop through the checkboxes and see if any is selected. If none, show an alert message and avoid postback

2: Server side:
Loop through checkboxes and see if any checkbox checked. If so, continue or else display the message.

Try.

Posted 2-Oct-12 2:05am

Sandeep Mewara

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cunny 2-Oct-12 8:30am

Yeah my requirement is like this...
I have a checkbox in header template as well as in item template..
If we select checkboxes on header template (Select All) it must select all checkboxes and if din't select any invidual checkbox it must show a alert message saying that..(Please select atleast one checkbox)

Sandeep Mewara 2-Oct-12 8:34am

Good. So, go ahead and try option 1.

Sergey Alexandrovich Kryukov 2-Oct-12 21:21pm

Right, a 5.
See also the link by Dylan Morley -- quite an elegant solution.
--SA

Dylan Morley · Answer 2 · 2012-10-02T02:50:00

Solution 5

A jQuery + jQuery.validate method here,

http://stackoverflow.com/questions/3035634/jquery-validate-check-at-least-one-checkbox[^]

jQuery only, with click handler - so your submit button is only activated when at least one is selected

http://css-tricks.com/snippets/jquery/test-if-at-least-one-checkbox-is-checked/[^]

Posted 2-Oct-12 2:50am

Dylan Morley

Comments

Sergey Alexandrovich Kryukov 2-Oct-12 21:19pm

Best idea so far, a 5.
--SA

Devang Vaja · Answer 3 · 2012-10-02T02:09:00

Solution 2

Dim str As String=""
For(i As integer=0 To chkList.Items.count-1)
if(chkList.Items(i).checked==True) Then
str+=chkList.Items(i).value
End If
Next

if(str==" ")
MsgBox('Please Select Item')
End If

sorry it's in VB.net

Posted 2-Oct-12 2:09am

Devang Vaja

Updated 2-Oct-12 2:14am

v4

Comments

Sandeep Mewara 2-Oct-12 8:34am

Not a web solution.

ahmedhussein369 · Answer 4 · 2012-10-02T02:13:00

Try this
function check()
{
var a=document.getElementsByName("checkbox"
var j=0
for(i=0;i<=a.length;i++)
{
if(a[i].checked==true)
{
j=j+1;
}
}
if (j==0)
{
alert("please select checkbox")
}
}

reid0588 · Answer 5 · 2012-10-02T02:49:00

Solution 4

Can you use a validation summary and on the properties, set the 'ShowMessageBox' option to 'true'

Posted 2-Oct-12 2:49am

reid0588

How to show alert message when none of the checkbox items are selected in asp.net

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