I want vb.net code to allow users to select only one option in the listview item,

Question

1.00/5 (2 votes)

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VB

Private Sub btnContinue_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnContinue.Click
        'Private Sub btnContinue_Click(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ListViewItemSelectionChangedEventArgs) Handles btnContinue.Click
        Dim lvi As ListViewItem = Nothing
       
        Dim _optionsHTML As String = "<ul>"
        Dim _options As String = ""
        Dim i As Integer = 0

        For Each lvi In lvCancellationOptions.Items
            

            If lvi.Checked Then

                _optionsHTML &= "<li>" & lvi.Text & "</li>"
                _options &= lvi.Text & vbCrLf
                i += 1

            End If

        Next

        _optionsHTML &= "</ul>"

        If (i = 0) Then

            MessageBox.Show("You must select at least one cancellation option")

        Else

            RaiseEvent ContinueCancellation(True, _optionsHTML, _options)
            Me.Close()

        End If

    End Sub

Posted 4-Feb-13 3:41am

vidkaat

Updated 4-Feb-13 3:55am

CHill60

v2

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Comments

CHill60 4-Feb-13 9:55am

what's the problem?

Sandeep Mewara 4-Feb-13 9:57am

And the issue is?

vidkaat 4-Feb-13 10:02am

This allows me to select multiple checkbos.But i need to restrict it to one checkbox click.

2 solutions

Solution 1

System.Windows.Forms solution: Set the Multiselect property to false for the ListView control.
System.Web.UI.WebControls solution: Add a javascript function to handle the selection changed event on the checkbox controls generated in the html and then simply clear all the other checkboxes in that function. Using jquery would make things much easier.

Posted 4-Feb-13 4:02am

fjdiewornncalwe

Updated 4-Feb-13 4:13am

v3

Comments

vidkaat 4-Feb-13 10:03am

i did that but it does not work.

fjdiewornncalwe 4-Feb-13 10:11am

Web or Windows.Forms?

vidkaat 4-Feb-13 10:12am

windows.forms

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Muthuraja Irullandi · Accepted Answer · 2013-02-04T04:27:00

Solution 2

Hi,
I have added an validation in ItemChecked event.

VB

Private Sub lvCancellationOptions_ItemCheck(ByVal sender As System.Object, ByVal e As System.Windows.Forms.ItemCheckEventArgs) Handles lvCancellationOptions.ItemCheck
        If (lvCancellationOptions.CheckedItems.Count > 0 And e.NewValue = CheckState.Checked) Then

            Dim item As ListViewItem = lvCancellationOptions.CheckedItems(0)
            item.Checked = False
        End If
    End Sub

Best Regards
Muthuraja

Posted 4-Feb-13 4:27am

Muthuraja Irullandi

Updated 4-Feb-13 5:38am

v4

Comments

vidkaat 4-Feb-13 10:32am

How do i do that .Just copy paste or create one from the designer.Please help.

Thanks.

Muthuraja Irullandi 4-Feb-13 10:37am

Hi,
In the form, select the listview control, in the property windows, select the events, and double click in the Item_Checked event.

I am modifying the code with your control name. Please see the updated solution and copy that code in your event.

Let me know any issues

vidkaat 4-Feb-13 10:50am

Thanks.It do work but wat would happen if the user selects a wrong one. So is there logic like if he clicks the second option the forst one should be unchecked.

Appreciate your help.
Thanks.

vidkaat 4-Feb-13 10:45am

Thanks.It do work but wat would happen if the user selects a wrong one. So is there logic like if he clicks the second option the forst one should be unchecked.

Appreciate your help.
Thanks.

Muthuraja Irullandi 4-Feb-13 11:16am

Hi,
Now I have added an logic into ItemCheck event, please check the updated solution

vidkaat 4-Feb-13 11:32am

Thanks for ur reply.What is the newValue means?

I am sorry to bother u so many times.

vidkaat 4-Feb-13 11:35am

I got it.Thanks.Works perfect for me.

Thank u so much.

Appreciate your time

Muthuraja Irullandi 4-Feb-13 11:39am

Thats, great, I have also modified the solution for vb.NET