C# crystal报告参数不正确

两份水晶报告

CrystalReport1.rpt

employeemonthly.rpt

在signal aspx.net页面上调用这些报告

 protected void Button1_Click1(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            if (rd.SelectedValue == "1")
            {
                DateTime to = Convert.ToDateTime(sdate.Text);
                dbconnect a = new dbconnect();
                ReportDocument rDoc = new ReportDocument();
                    a.OpenConnection();
                    a.cmd = new SqlCommand("viewattandace_repoeting",a.con);
                    SqlDataAdapter da = new SqlDataAdapter();
                    DataSet ds = new DataSet();
                    a.cmd.CommandType = CommandType.StoredProcedure;
                    da.SelectCommand = a.cmd;
                    da.Fill(ds, "viewattandace_repoeting");
                    rDoc.Load(Server.MapPath("CrystalReport1.rpt"));
                    rDoc.SetDataSource(ds);
                    rDoc.SetParameterValue("date", to);
                    rDoc.SetParameterValue("depid", 1);
                    CrystalReportViewer1.ReportSource = rDoc;
                    CrystalReportViewer1.DataBind();
                    a.CloseConnection();
                    CleartextBoxes(this);
            }
            else
                if (rd.SelectedValue == "2")
                sd = Convert.ToDateTime(m.SelectedItem.Text + "/" + "1" + "/" + yt.SelectedItem.Text);
                    ed = LastDayOfMonth(sd);
                    dbconnect a = new dbconnect();
                    using (ReportDocument rDoc = new ReportDocument())
                    {
                        a.OpenConnection();
                  a.cmd = new SqlCommand("viewattandace_repoeting", a.con);
                        SqlDataAdapter da = new SqlDataAdapter();
                        DataSet ds = new DataSet();
                        a.cmd.CommandType = CommandType.StoredProcedure;
                        da.SelectCommand = a.cmd;
                        da.Fill(ds, "viewattandace_repoeting");
                        rDoc.Load(Server.MapPath("employeemonthly.rpt"));
                        rDoc.SetDataSource(ds);
                        rDoc.SetParameterValue("sdate", sd);
                        rDoc.SetParameterValue("edate", ed);
                        rDoc.SetParameterValue("depid", 1);
                        rDoc.SetParameterValue("email", eet.Text.Trim());
                        CrystalReportViewer1.ReportSource = rDoc;
                        CrystalReportViewer1.DataBind();
                        a.CloseConnection();
                    }                       
                }
        }
    }

一次只能查看一个报告，其中dropdownlist列出了选定的索引。 现在的问题是只查看第一次选择的报告。当我选择其他报告时，则显示此“参数不正确”

比如说

---

我在下拉列表中选择CrystalReport1 report并单击按钮。然后选择report view，然后选择employeemonthly report并单击按钮，然后显示此“参数不正确”，反之亦然

如果您的部分代码

ReportDocument rDoc = new ReportDocument())

正如您在其他部分中所看到的，我可以通过添加新的CrystalReportViewer控件来解决这个问题

**按钮点击代码**

 protected void Button1_Click1(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {

            if (rd.SelectedValue == "1")

            {
                CrystalReportViewer1.Visible = true;
                    DateTime to = Convert.ToDateTime(sdate.Text);
                    dbconnect a = new dbconnect();
                    ReportDocument rDoc = new ReportDocument();
                    a.OpenConnection();
                    a.cmd = new SqlCommand("viewattandace_repoeting", a.con);
                    SqlDataAdapter da = new SqlDataAdapter();
                    DataSet ds = new DataSet();
                    a.cmd.CommandType = CommandType.StoredProcedure;
                    da.SelectCommand = a.cmd;
                    da.Fill(ds, "viewattandace_repoeting");
                    rDoc.Load(Server.MapPath("CrystalReport1.rpt"));
                    rDoc.SetDataSource(ds);
                    rDoc.SetParameterValue("date", to);
                    rDoc.SetParameterValue("depid", 1);
                    CrystalReportViewer1.ReportSource = rDoc;
                    CrystalReportViewer1.DataBind();
                    CrystalReportViewer1.ToolPanelView = CrystalDecisions.Web.ToolPanelViewType.None;
                                  a.CloseConnection();




            }
            else
                if (rd.SelectedValue == "2")
                {
                    CrystalReportViewer2.Visible = true;
                    sd = Convert.ToDateTime(m.SelectedItem.Text + "/" + "1" + "/" + yt.SelectedItem.Text);
                    ed = LastDayOfMonth(sd);
                    dbconnect a = new dbconnect();

                    ReportDocument rDoc = new ReportDocument();

                        a.OpenConnection();
                        a.cmd = new SqlCommand("viewattandace_repoeting", a.con);
                        SqlDataAdapter da = new SqlDataAdapter();
                        DataSet ds = new DataSet();
                        a.cmd.CommandType = CommandType.StoredProcedure;
                        da.SelectCommand = a.cmd;
                        da.Fill(ds, "viewattandace_repoeting");
                        rDoc.Load(Server.MapPath("employeemonthly.rpt"));
                        rDoc.SetDataSource(ds);
                        rDoc.SetParameterValue("sdate", sd);
                        rDoc.SetParameterValue("edate", ed);
                        rDoc.SetParameterValue("depid", 1);
                        rDoc.SetParameterValue("email", eet.Text.Trim());
                        CrystalReportViewer2.ReportSource = rDoc;
                        CrystalReportViewer2.DataBind();
                        CrystalReportViewer2.ToolPanelView = CrystalDecisions.Web.ToolPanelViewType.None;
                        a.CloseConnection();

}

---

}

当rd.SelectedValue==“2”有using语句时，您正在创建的报告，但是rd.SelectedValue==“1”的报告没有using语句。您能否用Crystal Reports中这些参数的数据类型的详细信息对代码进行注释？可能存在数据类型不匹配。请在if（rd.SelectedValue==“1”）处设置断点，并确保所选值发生更改。如果-yes，则在rDoc.Load（Server.MapPath…do rDoc.ReportParameters.Clear（）之后的ReportDocument上，我可以通过添加新的CrystalReportViewer.thanx以获得帮助来解决此问题。或者只需设置CrystalReportViewer1.ReportSource=null；然后提供正确的源：-）我也尝试了此方法，但仍然无法工作。然后添加新控件。

 protected void Button1_Click1(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {

            if (rd.SelectedValue == "1")

            {
                CrystalReportViewer1.Visible = true;
                    DateTime to = Convert.ToDateTime(sdate.Text);
                    dbconnect a = new dbconnect();
                    ReportDocument rDoc = new ReportDocument();
                    a.OpenConnection();
                    a.cmd = new SqlCommand("viewattandace_repoeting", a.con);
                    SqlDataAdapter da = new SqlDataAdapter();
                    DataSet ds = new DataSet();
                    a.cmd.CommandType = CommandType.StoredProcedure;
                    da.SelectCommand = a.cmd;
                    da.Fill(ds, "viewattandace_repoeting");
                    rDoc.Load(Server.MapPath("CrystalReport1.rpt"));
                    rDoc.SetDataSource(ds);
                    rDoc.SetParameterValue("date", to);
                    rDoc.SetParameterValue("depid", 1);
                    CrystalReportViewer1.ReportSource = rDoc;
                    CrystalReportViewer1.DataBind();
                    CrystalReportViewer1.ToolPanelView = CrystalDecisions.Web.ToolPanelViewType.None;
                                  a.CloseConnection();




            }
            else
                if (rd.SelectedValue == "2")
                {
                    CrystalReportViewer2.Visible = true;
                    sd = Convert.ToDateTime(m.SelectedItem.Text + "/" + "1" + "/" + yt.SelectedItem.Text);
                    ed = LastDayOfMonth(sd);
                    dbconnect a = new dbconnect();

                    ReportDocument rDoc = new ReportDocument();

                        a.OpenConnection();
                        a.cmd = new SqlCommand("viewattandace_repoeting", a.con);
                        SqlDataAdapter da = new SqlDataAdapter();
                        DataSet ds = new DataSet();
                        a.cmd.CommandType = CommandType.StoredProcedure;
                        da.SelectCommand = a.cmd;
                        da.Fill(ds, "viewattandace_repoeting");
                        rDoc.Load(Server.MapPath("employeemonthly.rpt"));
                        rDoc.SetDataSource(ds);
                        rDoc.SetParameterValue("sdate", sd);
                        rDoc.SetParameterValue("edate", ed);
                        rDoc.SetParameterValue("depid", 1);
                        rDoc.SetParameterValue("email", eet.Text.Trim());
                        CrystalReportViewer2.ReportSource = rDoc;
                        CrystalReportViewer2.DataBind();
                        CrystalReportViewer2.ToolPanelView = CrystalDecisions.Web.ToolPanelViewType.None;
                        a.CloseConnection();