combobox - Why does changing selected value change selected item to null in c#

cmbOrganizacionaJedinica.ValueMember = "Id";
cmbOrganizacionaJedinica.DisplayMember = "Naziv";
cmbOrganizacionaJedinica.DataSource = vratiOJ();
Debug.WriteLine(cmbOrganizacionaJedinica.SelectedValue);
Debug.WriteLine(((OrganizacionaJedinica)cmbOrganizacionaJedinica.SelectedItem).Naziv);
cmbOrganizacionaJedinica.SelectedValue = 1;
Debug.WriteLine(((OrganizacionaJedinica)cmbOrganizacionaJedinica.SelectedItem).Naziv);

I get the SelectedValue with the first WriteLine, which is 1, but when i set it to 1 again it gives me an error because the selectedItem is now null

cmbOrganizacionaJedinica.ValueMember = "Id";
cmbOrganizacionaJedinica.DisplayMember = "Naziv";
cmbOrganizacionaJedinica.DataSource = vratiOJ();
Debug.WriteLine(cmbOrganizacionaJedinica.SelectedValue);
Debug.WriteLine(((OrganizacionaJedinica)cmbOrganizacionaJedinica.SelectedItem).Naziv);
cmbOrganizacionaJedinica.SelectedValue = 1;
Debug.WriteLine(((OrganizacionaJedinica)cmbOrganizacionaJedinica.SelectedItem).Naziv);

I get the SelectedValue with the first WriteLine, which is 1, but when i set it to 1 again it gives me an error because the selectedItem is now null

Share Improve this question asked Nov 17, 2024 at 16:45 Mike Lol 331 silver badge4 bronze badges

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1 Answer 1

Sorted by: Reset to default 1

I found the reason. Id was long so cmbOrganizacionaJedinica.SelectedValue = (long)1; works

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combobox - Why does changing selected value change selected item to null in c# - Stack Overflow

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