水晶报表中的动态图像绑定

Question

我在绑定Crystal Reports中的动态URL时遇到麻烦。我只想将URL设置为“图像的虚拟路径”而不是物理路径。

以下是我的代码。

public void ViewImages(int a)  
 {  
    try  
        {  
            string result = " ";  
            string sql = Session["ReportSQL"].ToString();  
            SqlCommand cmd = new SqlCommand(sql, con);  
            SqlDataAdapter da = new SqlDataAdapter(cmd);  
            SystemReport cml = new SystemReport();  

            da.Fill(cml, "DocumentManager");
            con.Close();
            foreach (DataRow row in cml.Tables["DocumentManager"].Rows)
            {                   
                row["Path"] = row["Path"];     
                result = "../images/"+row["Path"].ToString();                   
            }                                            
            ReportDocument cm = new ReportDocument();
            cm.Load(Server.MapPath("~/Reports/ShowImage.rpt"));               
            cm.SetDataSource(cml);   
            Viewer.ReportSource = cm;
            Viewer.DataBind();

        }
        catch (Exception ex)
        {
            throw ex;
        }
    }