Question

我是.net和C＃的新手，我的asp水晶报告不会打印或导出。我已经读过你必须使用会话才能做到这一点。任何人都可以给我任何提示吗？我有一个基本的网页设置，可以让您查看我们的报告并输入参数。这工作正常。每当我尝试打印或导出我的页面开始做某事然后停止，我什么也得不到。有什么建议吗？这是我的代码

protected void Page_Load(object sender, EventArgs e)
{
     SqlConnection CN;
     String MyConnectionString = null;
     MyConnectionString =  "data source=srv;initial catalog=db;user id=reports;password=";
     CN = new SqlConnection(MyConnectionString);
     CN.Open();
     string SQL = null;
     SQL =  "SELECT oeordhdr_sql.ord_no,  oeordlin_sql.line_seq_no, oeordlin_sql.qty_to_ship, oeordlin_sql.cus_item_no, imitmidx_sql.upc_cd, imitmidx_sql.item_desc_1, oelincmt_sql.cmt, oeordhdr_sql.ship_to_name, oeordhdr_sql.ship_to_addr_1, oeordhdr_sql.ship_to_addr_2, oeordhdr_sql.ship_to_addr_3, oeordhdr_sql.ship_to_addr_4,sycdefil_sql.cd_type, sycdefil_sql.code_desc FROM(((oeordhdr_sql   oeordhdr_sql  INNER JOIN  oeordlin_sql   oeordlin_sql  ON( oeordhdr_sql.ord_type  =  oeordlin_sql.ord_type ) AND( oeordhdr_sql.ord_no  =  oeordlin_sql.ord_no )) LEFT OUTER JOIN  oelincmt_sql   oelincmt_sql  ON  oeordhdr_sql.ord_no  =  oelincmt_sql.ord_no ) LEFT OUTER JOIN  sycdefil_sql   sycdefil_sql  ON  oeordhdr_sql.ship_via_cd  =  sycdefil_sql.sy_code ) INNER JOIN  imitmidx_sql   imitmidx_sql  ON  oeordlin_sql.item_no  =  imitmidx_sql.item_no WHERE sycdefil_sql.cd_type  = 'V' AND  oeordhdr_sql.ord_no  = ' {?Ord_no}' ORDER BY  oeordhdr_sql.ord_no";

     SqlDataAdapter myDa = new SqlDataAdapter(SQL, CN);
     CN.Close();
     DataSet DS = new DataSet();
     myDa.Fill(DS, "DataTable1");
     ReportDocument myRPT = new ReportDocument();
     myRPT.Load(Server.MapPath("~/CrystalReport.rpt"));
     myRPT.SetDataSource(DS);
     CrystalReportViewer1.ReportSource = myRPT;
}

Answer 1

事实证明，我需要做的就是添加一个if（！Page.IsPostback）

protected void Page_Load(object sender, EventArgs e)
{
if(!Page.IsPostBack)
{
     SqlConnection CN;
     String MyConnectionString = null;
     MyConnectionString =  "data source=srv;initial catalog=db;user id=reports;password=";
     CN = new SqlConnection(MyConnectionString);
     CN.Open();
     string SQL = null;
     SQL =  "SELECT oeordhdr_sql.ord_no,  oeordlin_sql.line_seq_no, oeordlin_sql.qty_to_ship, oeordlin_sql.cus_item_no, imitmidx_sql.upc_cd, imitmidx_sql.item_desc_1, oelincmt_sql.cmt, oeordhdr_sql.ship_to_name, oeordhdr_sql.ship_to_addr_1, oeordhdr_sql.ship_to_addr_2, oeordhdr_sql.ship_to_addr_3, oeordhdr_sql.ship_to_addr_4,sycdefil_sql.cd_type, sycdefil_sql.code_desc FROM(((oeordhdr_sql   oeordhdr_sql  INNER JOIN  oeordlin_sql   oeordlin_sql  ON( oeordhdr_sql.ord_type  =  oeordlin_sql.ord_type ) AND( oeordhdr_sql.ord_no  =  oeordlin_sql.ord_no )) LEFT OUTER JOIN  oelincmt_sql   oelincmt_sql  ON  oeordhdr_sql.ord_no  =  oelincmt_sql.ord_no ) LEFT OUTER JOIN  sycdefil_sql   sycdefil_sql  ON  oeordhdr_sql.ship_via_cd  =  sycdefil_sql.sy_code ) INNER JOIN  imitmidx_sql   imitmidx_sql  ON  oeordlin_sql.item_no  =  imitmidx_sql.item_no WHERE sycdefil_sql.cd_type  = 'V' AND  oeordhdr_sql.ord_no  = ' {?Ord_no}' ORDER BY  oeordhdr_sql.ord_no";

     SqlDataAdapter myDa = new SqlDataAdapter(SQL, CN);
     CN.Close();
     DataSet DS = new DataSet();
     myDa.Fill(DS, "DataTable1");
     ReportDocument myRPT = new ReportDocument();
     myRPT.Load(Server.MapPath("~/CrystalReport.rpt"));
     myRPT.SetDataSource(DS);
     CrystalReportViewer1.ReportSource = myRPT;
}
}

如何在asp.net中使用水晶报告中的Sessions

1 个答案: