by using array how to store data in database

To enter data into database, assuming you have two fields

"myField1":nvarchar(50)
"myField2":datetime

And are using MS Sql:

using (SqlConnection con = new SqlConnection(strConnect))
    {
    con.Open();
    using (SqlCommand com = new SqlCommand("INSERT INTO myTable (myField1, myField2) " +
                                           "VALUES (@MF1, @MF2)", con))
        {
        com.Parameters.AddWithValue("@MF1", "Test");
        com.Parameters.AddWithValue("@MF2", DateTime.Now);
        com.ExecuteNonQuery();
        }
    }

To read it out, a TextBox is not the best choice, somethign that displays rows fo data would be better: try a DataGridView:

using (SqlConnection con = new SqlConnection(strConnect))
    {
    DataSet ds = new DataSet();
    SqlDataAdapter adp = new SqlDataAdapter("SELECT * FROM myTable", con);
    adp.Fill(ds);
    myDataGridView.DataSource = ds;
    }