Selection CHANGED NOT WORK

Question

SELECTION CHANGED IF COLUMN VALUE NULL TO DATETIMEPICKER?

 

Here is problem...what to do if is column with datetime in datagrid empty...

Wheh is column populated everything working fine...

 

if (prijava_radnikaDataGridView.SelectedRows.Count > 0 && vrijemeprijaveDateTimePicker == null && vrijemeodjaveDateTimePicker == null)

 I am create on top solution if can help

 

private DateTime emptydate = DateTime.Parse("2018-01-01 00:00:00");


 public static string datumprijaveprijavnice = "";
 public static string datumpodjaveprijavnice = "";

 

 

This is my code

 

private void prijava_radnikaDataGridView_SelectionChanged(object sender, EventArgs e)
       {
          // if (prijava_radnikaDataGridView.SelectedRows.Count > 0 )
             // if (prijava_radnikaDataGridView.SelectedRows.Count > 0 && vrijemeprijaveDateTimePicker == null && vrijemeodjaveDateTimePicker == null)

           if (prijava_radnikaDataGridView.SelectedRows.Count > 0 && vrijemeodjaveDateTimePicker == null)
           {

               string id = prijava_radnikaDataGridView.CurrentRow.Cells["dataGridViewTextBoxColumn1"].FormattedValue.ToString();
              string radnik = prijava_radnikaDataGridView.CurrentRow.Cells["dataGridViewTextBoxColumn9"].FormattedValue.ToString();
               string redni_broj = prijava_radnikaDataGridView.CurrentRow.Cells["redni_broj"].FormattedValue.ToString();



               radnikComboBox.Text = radnik;
               vrijemeprijaveDateTimePicker.Value = Convert.ToDateTime(prijava_radnikaDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn2"].Value);
              vrijemeodjaveDateTimePicker.Value = Convert.ToDateTime(prijava_radnikaDataGridView.SelectedRows[0].Cells["dataGridViewTextBoxColumn3"].Value);
               redni_brojTextBox.Text = redni_broj;
               idPrijavaTextBox.Text = id;

           }
       }