how to update gridview checkbox selected value as 1 to database in asp.net

This is my progress on submit button

protected void BtnSubmit_Click(object sender, ImageClickEventArgs e)
{


SqlConnection con = new SqlConnection(_connString);
con.Open();
foreach (GridViewRow row in GVMessagesDisplay.Rows)
{
int key = (int)GVMessagesDisplay.DataKeys[row.RowIndex].Value;
CheckBox cb = (CheckBox)row.FindControl("CheckOne");
SqlCommand cmd = new SqlCommand("UPDATE Messages SET Status = " + cb.Checked + " Where Id=" + key.ToString(), con);
cmd.ExecuteNonQuery();
}
con.Close();


}

but it shows error

Invalid column name 'False'.

Please can you help me

thanks....