asp.net中数据库中图片的显示

页面的对应的c#代码如下：
public partial class productList : System.Web.UI.Page
{
        protected System.Web.UI.WebControls.DataGrid DataGrid1;

public static int TotalPage;//定义变量来保存总页数
public int CurPage;//定义变量来保存当前页索引
public int Tnum;//总条数;
public int EachPage;//每页总条数        public SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["ConnStr"]);        public String strDaohang ="";
        public String str1="";
        public DataTable myTable = new DataTable("myTable");
        public DataTable myTable2 = new DataTable("myTable2"); protected void Page_Load(object sender, System.EventArgs e)
{
            if(Request.QueryString["categoryid"]!=null)
            {
                String strID = Request.QueryString["categoryid"].ToString ();
               
//绑定 类别所对应的子类
                String sql="SELECT * FROM PType where parentId=" + strID;
                SqlCommand command=new SqlCommand(sql,conn);
                conn.Open();
                SqlDataReader dr=command.ExecuteReader(); 
                Repeater1.DataSource = dr;
                Repeater1.DataBind();
                dr.Close();
                conn.Close(); 
  
                //导航条
                InitDaohang(strDaohang,strID);
                daohang.Text =strDaohang;                //--------------------------------------                myTable.Columns.Add("category_ID");
                myTable.Columns.Add("category_name");                String sql2="SELECT * FROM PType where category_ID=" + strID;
                SqlCommand command2=new SqlCommand(sql2,conn);
                conn.Open();
                SqlDataReader dr2=command2.ExecuteReader();
                
                if(dr2.Read())
                {
                    DataRow row = myTable.NewRow();
                    row["category_ID"]=dr2["category_ID"].ToString();
                    row["category_name"]=dr2["category_name"].ToString();
                    myTable.Rows.Add(row);
                }
                
                dr2.Close();
                conn.Close();                 //----------------------------------
                ClassList(strID);
                myTable2.Columns.Add("id");
                myTable2.Columns.Add("CId");
                myTable2.Columns.Add("name");
                
                productsList();            }        }        private void InitDaohang(string strTmp,string parentId)//初始化导航条
        {
            SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["ConnStr"]);
        
            String sql="SELECT * FROM PType where category_ID=" + parentId;
            SqlCommand command=new SqlCommand(sql,conn);
            conn.Open();
            SqlDataReader dr=command.ExecuteReader();             if(dr.Read())
            {
                InitDaohang(strTmp,dr["parentId"].ToString());
                strTmp += " >> ";
                strTmp += "<a href ='productList.aspx?categoryid=";
                strTmp += dr["category_ID"].ToString();
                strTmp += "'>";
                strTmp += dr["category_name"].ToString();
                strTmp += "</a>";  
                strDaohang += strTmp;
            }            dr.Close();
            conn.Close();
        }        private void ClassList(string CId)
        {
            SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["ConnStr"]);
        
            String sql="SELECT * FROM PType where parentId=" + CId;
            SqlCommand command=new SqlCommand(sql,conn);
            conn.Open();
            SqlDataReader dr=command.ExecuteReader();            string strTmp="";
            while(dr.Read())
            {
                strTmp += " : ";
                strTmp += "<a href ='productList.aspx?categoryid=";
                strTmp += dr["category_ID"].ToString();
                strTmp += "'>";
                strTmp += dr["category_name"].ToString();
                strTmp += "</a>";  
                
                ClassList(dr["category_ID"].ToString());
                
                DataRow row = myTable.NewRow();
                row["category_ID"]=dr["category_ID"].ToString();
                row["category_name"]=dr["category_name"].ToString();
                myTable.Rows.Add(row);
                
            }
            str1 += strTmp;            dr.Close();
            conn.Close();
        }        private void productsList()//商品列表
        {
            SqlConnection conn=new SqlConnection(ConfigurationSettings.AppSettings["ConnStr"]);
            String sql="Select * from Products where ProductType=0";            foreach(DataRow row in myTable.Rows)
            {
                sql += " or ProductType=" + row["category_ID"].ToString();
            }            sql += "order by ProductId desc";
             SqlDataAdapter da=new SqlDataAdapter(sql,conn);
DataSet ds=new DataSet();
            da.Fill(ds,"Table");
PagedDataSource objPage=new PagedDataSource();//创建分页类
objPage.DataSource=ds.Tables["Table"].DefaultView;//设置数据源 objPage.AllowPaging=true;
objPage.PageSize=5; if(Request.QueryString["Page"]!=null)
            {
                CurPage=Convert.ToInt32(Request.QueryString["Page"]);
                CurPage=Math.Min(CurPage,objPage.PageCount);
                CurPage=Math.Max(CurPage,1);
            }
else
CurPage=1;
objPage.CurrentPageIndex=CurPage-1;
TotalPage=objPage.PageCount;
Tnum=objPage.DataSourceCount;
EachPage=objPage.Count;
lblCurPage.Text="第 "+CurPage.ToString()+" / "+TotalPage.ToString()+" 页";
lblTnum.Text="共: " +Tnum+" 条记录";
lblEachPage.Text="每页有: "+EachPage.ToString()+" 条记录";

if(objPage.CurrentPageIndex!=0)
lnkFirst.NavigateUrl=Request.CurrentExecutionFilePath+"?categoryid="+Request.QueryString["categoryid"].ToString()+"&Page="+Convert.ToString(1);
if(objPage.CurrentPageIndex!=TotalPage-1)
lnkLast.NavigateUrl=Request.CurrentExecutionFilePath+"?categoryid="+Request.QueryString["categoryid"].ToString()+"&Page="+Convert.ToString(TotalPage);

if(!objPage.IsFirstPage)
lnkPrev.NavigateUrl=Request.CurrentExecutionFilePath+"?categoryid="+Request.QueryString["categoryid"].ToString()+"&Page="+Convert.ToString(CurPage-1);
if(!objPage.IsLastPage)
lnkNext.NavigateUrl=Request.CurrentExecutionFilePath+"?categoryid="+Request.QueryString["categoryid"].ToString()+"&Page="+Convert.ToString(CurPage+1);
            Repeater2.DataSource = objPage;
            Repeater2.DataBind();
           
            conn.Close();
        } #region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}

/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{     }
#endregion protected void btnPage_Click(object sender, System.EventArgs e)
{
int PageNum=0;
if( !Request.Form["txtPage"].Equals("") )
PageNum=Convert.ToInt32(Request.Form["txtPage"]);
if(PageNum<=0 || PageNum>TotalPage)
Response.Redirect(Request.CurrentExecutionFilePath+"?categoryid="+Request.QueryString["categoryid"].ToString()+"&Page="+Convert.ToString(1));
else
Response.Redirect(Request.CurrentExecutionFilePath+"?categoryid="+Request.QueryString["categoryid"].ToString()+"&Page="+Convert.ToString(PageNum));
} }
}我在数据库中存储的是文件的路径及文件的名字
用了reapter控件想在页面显示图片，我运行了就是显示不出图片 ，查找html代码是读不出文件的名字 该怎样改 小弟求救了急急！！