Keep Getting null on DataRowView'

Question

        private void OnDoubleClick(object sender, MouseButtonEventArgs e)
        { 
            DataGrid dataGrid = (DataGrid)sender;
            DataRowView row_selected = dataGrid.SelectedItem as DataRowView;

            var s = row_selected["Nome"].ToString();
            MessageBox.Show(s);
        }  

I'm trying to make a cell value message box when selected

Answer 1

I don't know what exactly you want to achive but I assume that your trying to pop a message box on double click on selected value on the grid view.

This is done by DataGridView Event.

    private void dataGridView1_DoubleClick(object sender, EventArgs e)
    {

    } 

Then you can use the DataGridViewCell.Value Property to retrieve the value stored in a particular cell.

MessageBox.Show(dataGridView1.SelectedCells[0].Value.ToString());

So the final code would look like this.

        private void dataGridView1_DoubleClick(object sender, EventArgs e)
        {
           MessageBox.Show(dataGridView1.SelectedCells[0].Value.ToString());
        }  

NOTE change the Gridview name as you datagrid name