我不把访问次数保存在数据库,显示登陆次数是正常有效的. 我想把登陆次数保存在数据库,一调用DbPageCounter.cs 结果登陆次数每次显示都是0.

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;

/// <summary>
/// DbPageCounter 的摘要说明
/// </summary>
public class DbPageCounter:IPageCounter
{
    private SqlConnection conn;
    public DbPageCounter()
    {
        //从配置文件web.config中读取数据库连接串
        string strConn = ConfigurationManager.AppSettings["ConnStr"];
        conn = new SqlConnection(strConn);        
    }
    ~DbPageCounter()
    {
        conn.Close();
    }

    #region IPageCounter成员
    public int GetPageCount()
    {
        //打开数据库连接
        conn.Open();


        //创建SqlCommand
        SqlCommand cmd = conn.CreateCommand();
        cmd.CommandText = "SELECT PageCount FROM SiteStat";
        int iCount = 0;


        try
        {
            //读取PageCount字段的值
            iCount = (int)cmd.ExecuteScalar();
        }
        catch (SqlException ex)
        {
        }
        catch (Exception ex)
        {
        }
        finally
        {
            //关闭数据库连接
            conn.Close();
        }
        return iCount;
    }


    public void SetPageCount(int iCount)
    {
        //打开数据库连接
        conn.Open();
        SqlCommand cmd = conn.CreateCommand();
        cmd.CommandText =string.Format("UPDATA SiteStat SET PageCount = {0}",iCount);

        try
        {
            //执行update语句
            cmd.ExecuteNonQuery();
        }
        catch (SqlException ex)
        {
        }
        catch (Exception ex)
        {
        }
        finally
        {
            //关闭数据库连接
            conn.Close();
        }
    }

    public void IncreasePageCount()
    {
        //打开数据库连接
        conn.Open();

        //创建SqlCommand
        SqlCommand cmd = conn.CreateCommand();

        //开始事务
        SqlTransaction trans = conn.BeginTransaction();
        cmd.Connection = conn;
        cmd.Transaction = trans;
        cmd.CommandText = "UPDATA SiteStat SET PageCount = PageCoun + 1";

        try
        {
            //执行update语句
            cmd.ExecuteNonQuery();
            trans.Commit();
        }
        catch (Exception ex)
        {
            try
            {
                //若发生异常则回滚
                trans.Rollback();
            }
            catch(SqlException se)
            { 
            }
        }
        finally
        {
            //关闭数据库连接
            conn.Close();
        }
    }

    #endregion
}
哪位大虾帮忙看看 是那里有问题.谢谢