สอบถามค่ะ ด่วนมากก : Conversion failed when converting date and/or time from character string.

          SqlConnection Cn = new SqlConnection();
            SqlCommand Cm = new SqlCommand();
            Cn.ConnectionString = Properties.Settings.Default.cnStr;
            SqlDataAdapter Da;
            DataSet ds = new DataSet();
            string SqlStr;
        
            SqlStr = "Select member_id,book_id from rent where rent_return = '" + dtpChargeDate1.Text + "'";
            Cn.Open();
            Da = new SqlDataAdapter(SqlStr, Cn);
            Da.Fill(ds);
           
            ds.Dispose();
            Da.Dispose();
            Cn.Close();
            Cn.Dispose();
            dtgshow.DataSource = ds.Tables[0].DefaultView;
            dtgshow.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCells);

            dtgshow.Columns[0].Width = 0;