private void ShowTableList(string tableName, bool clearTable)
    {
        if (clearTable == true)
        {
            this.ShowTable.Rows.Clear();
        }
        SqlConnection conn = new SqlConnection(SqlConn.Connstring);
        SqlCommand command = null;

        if (tableName == "mainforum")
        {
            command = new SqlCommand("SELECT * FROM " + tableName + "WHERE id = " + Session["mainid"].ToString(), conn);

        }
        else
        {
            command = new SqlCommand("SELECT * FROM " + tableName + "WHERE titleid = " + Session["mainid"].ToString(), conn);
        }
        SqlDataReader datareader = null;
        int num = GetRecordNumber(tableName);
        Label[] label = new Label[num];
        HyperLink[] hyperLink = new HyperLink[num];
        TextBox[] textbox = new TextBox[num];
        conn.Open();
        datareader = command.ExecuteReader();//???????????????
        int i = 0;

        while (datareader.Read())
        {
            TableRow row = new TableRow();
            TableCell cell = new TableCell();
            label[i] = new Label();
            if (tableName == "mainforum")
            {
                label[i].Text = "Post author : " + datareader["author"].ToString() +
                    "<br>Post title : " + datareader["title"].ToString() +
                    "<br>Last modify time : " + datareader["releasetime"].ToString() + "&nbsp&nbsp";
            }
            else
            {
                label[i].Text = "Post author : " + datareader["author"].ToString() +
                    "<br>Last modify time : " + datareader["lastmodifytime"].ToString() + "&nbsp&nbsp";
            }
            cell.Controls.Add(label[i]);
            hyperLink[i] = new HyperLink();
            hyperLink[i].Text = "[Modified post]";
            hyperLink[i].Target = "_top";
            if (tableName == "mainforum")
            {
                hyperLink[i].NavigateUrl = "ArticleModify.aspx?state=modifyMain";
            }
            else
            {
                hyperLink[i].NavigateUrl = "ArticleModify.aspx?state=modifySub&subid=" + datareader["id"].ToString();
            }
            cell.Controls.Add(hyperLink[i]);
            row.Cells.Add(cell);
            this.ShowTable.Rows.Add(row);
            row = new TableRow();
            cell = new TableCell();
            textbox[i] = new TextBox();
            textbox[i].TextMode = TextBoxMode.MultiLine;
            textbox[i].ReadOnly = true;
            textbox[i].Width = 700;
            textbox[i].Height = 100;
            textbox[i].Text = "" + datareader["content"].ToString();
            cell.Controls.Add(textbox[i]);
            row.Cells.Add(cell);
            this.ShowTable.Rows.Add(row);
        }
        datareader.Close();
        conn.Close();
    }