On Item Selection Issue...

[Donald]

I am missing something here and getting an error. I am new to c# so please excuse the trivial question I am sure.

"System.NullReferenceException: 'Object reference not set to an instance of an object.'"

Here is the code for SelectionChanged Event

private void lvAddressTypes_SelectionChanged(object sender, Syncfusion.WinForms.ListView.Events.ItemSelectionChangedEventArgs e)

        {

            //========================================

            // Populate textbox upon selection

            //========================================

            string oldAddressType = (lvAddressTypes.SelectedItems[0] as dsBigTopERP.tbl_AddressTypeRow).AddressTypeText.ToString();

            txtAddAddressType.Text = oldAddressType;

        }

Tried to follow this sample code posted here in the above code.

            string Sele��o = (sfListView1.SelectedItems[0] as USState).LongName.ToString();

           

            MessageBox.Show(Sele��o);

[Gokul Thanudhas]

Hi Donald

The Nullexception can be handled by using the null check condition. Please refer to the link for your reference to handle null exceptions.

How to handle C# NullReferenceException? Examples (tutorialkart.com)

If the issue persists, please share the issue reproducible sample so that we can try to solve the issue from our end.

Regards,

Gokul T

[Donald]

This item should not be null though. The listview has be databound and has 5 entries in it. When I click on an entry the code above gives me the null exception.

Form Load Event

lvAddressType.DataSource = dsBigTopERP.GetAddressTypes();

lvAddressType.DisplayMember = "AddressTypeText"

lvAddressType.ValueMemner = "idAddressType"

...

On Selection Click Event

string oldAddressType = (lvAddressTypes.SelectedItems[0] as dsBigTopERP.tbl_AddressTypeRow).AddressTypeText.ToString();

As far as the code, I could share with you privately only.

[BagavathiPerumal Apranandham]

Hi Donald,

We have already created ticket for the mentioned query under your account. Please follow the ticket for further updates. And you can share the files in the ticket.

Regards,
Bagavathi Perumal A