filter a datagrid

Question

Hy :) i'm trying to filter a datagrid by name ( i have a textbox ) and by client type ( combobox with options: all, personal and other ), and i have a button which clears the criteria. The filtering works fine, but when clearing the criteria and the option is personal/other the datagrid shows only personal/other clients..not all of them..and i don't know how to fix it. Here's the code:

private void filter(string name)
        {
            if (comboBox1.SelectedItem.ToString() == "Personal")
            {
                clientGridView.DataSource = dataSet.Tables["client"].DefaultView;
                dataSet.Tables["client"].DefaultView.RowFilter = "client_type LIKE 'personal' AND name LIKE '%" + name + "%'";
            }
            else
                if (comboBox1.SelectedItem.ToString() == "Other")
                {
                    clientGridView.DataSource = dataSet.Tables["client"].DefaultView;
                    dataSet.Tables["client"].DefaultView.RowFilter = "client_type LIKE 'other' AND name LIKE '%" + name + "%'";
                }
                else
                {
                    try
                    {
                        clientGridView.DataSource = dataSet.Tables["client"].DefaultView;
                        dataSet.Tables["client"].DefaultView.RowFilter = "client_type LIKE '%' AND name LIKE '%" + name + "%'";
                    }
                    catch { }
                }
        }

and for the clear button

textBox1.Clear();
            comboBox1.SelectedItem = "-choose-";