Nerde Hata Yapıyorum.
Kod:
OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Data Source=sistem1.mdb");
da = new OleDbDataAdapter("Select * from sistem1 where kac_kat like '" + comboBox1.SelectedValue + comboBox2.SelectedValue, con);
ds = new DataSet();
con.Open();
da.Fill(ds, "sistem");
comboBox2.DisplayMember = "kac_kat";
comboBox2.DataSource = da;
comboBox1.DisplayMember = "deprem";
comboBox1.DataSource = da;
dataGridView1.DataSource = ds.Tables["sistem"];
con.Close();