前台获取后台datatable

方法一：

前台代码：

 <div>
    <%for (int i = 0; i < dtTitle.Rows.Count; i++)
      { %>
      <div style="float:left;">
        <a href="Default2.aspx?id=<%Response.Write(dtTitle.Rows[i]["ID"].ToString()); %>">
            <%Response.Write(dtTitle.Rows[i]["title"].ToString()); %>
        </a></div>
      <%} %>
    </div>

后台代码：

public partial class _Default : System.Web.UI.Page 
{
    public DataTable dtTitle = null;
    protected void Page_Load(object sender, EventArgs e)
    {
        getData();
    }
    protected void getData()
    {
        string sql = "select top 5 * from viewTitle where isview=1";
        DataSet dsTitle = DbHelperOleDb.Query(sql);
        dtTitle = dsTitle.Tables[0];
    }
}

注意：public DataTable dtTitle = null;

datatable要是全局的。不然前台读不到datatable。

方法二(拼接字符串)：

前台代码：用<%=str%>绑定后台变量;

<li>
                        <a href="#">新闻资讯</a>
           <ul style="183px; display: inline;  margin-left: 25px;  font-size: 14px; font-weight: bold;">
          <%=str%>
    </ul>

                    </li>                

后台代码：

public StringBuilder str = new StringBuilder();//注意这里要public
    protected void Page_Load(object sender, EventArgs e)
    {
        string SQLString = "select * from productclass where productid=0";
        string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ToString();
        DataSet ds = new DataSet();
        using (OleDbConnection connection = new OleDbConnection(connectionString))
        {
            try
            {
                connection.Open();
                OleDbCommand command = new OleDbCommand(SQLString, connection);
                OleDbDataAdapter da = new OleDbDataAdapter(command);
                da.Fill(ds, "ds");
            }
            catch (System.Data.OleDb.OleDbException ex)
            {
                throw new Exception(ex.Message);
            }
        }
        DataTable dt = ds.Tables[0];
        int count = dt.Rows.Count;
        for (int i = 0; i < count; i++)
        {
            str.Append("<li style=\" 113px; display: inline;margin-top: 15px;\">");
            str.Append("<a  title=" + (dt.Rows[i]["productname"]).ToString() + "  href=\"NewsList.aspx?id=" + Convert.ToInt32(dt.Rows[i]["id"]) + "\"");
            str.Append(" style=\"color: #FDFC89\"");
            str.Append(">");
            str.Append("" + dt.Rows[i]["productname"].ToString() + "");
            str.Append("</a>");
            str.Append("</li>");
        }
        //Response.Write(str);
    }