水晶报表 问题

Question

我配置好了一个水晶报表 可是页面上什么都不显示 这是为啥啊 希望高手帮忙谢谢！！！
下面是代码：public partial class ContentPage_Memory : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        bindCystall();
    }
    private void bindCystall()
    {
        string Sql_str = "select * from WO_Users";
        string connstr = GetMsSqlConnStr();
        DataSet ds = new DataSet();
        using (OleDbConnection conn = new OleDbConnection(GetMsSqlConnStr()))
        {
            conn.Open();
            OleDbCommand cmd = new OleDbCommand();            OleDbDataAdapter ada = new OleDbDataAdapter();
            
            cmd.CommandText = Sql_str;
            cmd.CommandType = CommandType.Text;
            cmd.Connection = conn;            ada.SelectCommand = cmd;
            ada.Fill(ds, "WO_Users");
            conn.Close();            CrystalReportSource1.ReportDocument.Load(Server.MapPath("CrystalReport.rpt"));
            CrystalReportSource1.ReportDocument.SetDataSource(ds.Tables["WO_Users"]);
            CrystalReportSource1.DataBind();            CrystalReportViewer1.ReportSource = CrystalReportSource1;
            CrystalReportViewer1.DataBind();
            
        }    }
    public static string GetMsSqlConnStr()
    {
        string str = "Provider=Microsoft.Jet.OleDb.4.0;";
        str += "Data Source=" + HttpContext.Current.Server.MapPath("~/app_data\\WoNext.mdb") + ";";
        str += " User ID=" + System.Configuration.ConfigurationManager.AppSettings["databaseuserid"] + ";";
        str += "Jet OLEDB:Database Password=" + System.Configuration.ConfigurationManager.AppSettings["databasepassword"] + ";";
        return str;
    }
}下面是页面显示：

Answer 1

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