报告查看器多个数据集

Question

我有一个应该显示报表查看器的 Web 应用程序。这是我的步骤：

1) 将脚本管理器和报表查看器添加到新的 Web 表单

2) 添加报表并将其绑定到名为 dataset1 的数据集

3) 为查询创建一个参数

4) 为网络表单编写代码...

   private DataTable GetData(Int64 id_doc)
    {
        DataTable dt = new DataTable();
        string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionStringloginDb"].ConnectionString;
        try
        {
            using (var conn = new MySqlConnection(connStr))
            {
                string sSQL = "select * from details_doc where id_doc=@id_doc";
                MySqlCommand cmd = new MySqlCommand(sSQL, conn);
                cmd.CommandType = CommandType.Text;
                cmd.Parameters.Add(new MySqlParameter("@id_doc", Session["id_doc"].ToString()));
                MySqlDataAdapter adp = new MySqlDataAdapter(cmd);
                adp.Fill(dt);
            }
        }
        catch (Exception)
        {
            throw;
        }
        return dt;
    }

    protected void showReport()
    {
        DataTable dt = GetData(Convert.ToInt64(Session["id_doc"].ToString()));
        rptViewer.LocalReport.Refresh();
        rptViewer.Reset();
        rptViewer.LocalReport.EnableExternalImages = true;
        this.rptViewer.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Local;
        ReportDataSource rds = new ReportDataSource("DataSet1", dt);
        rptViewer.LocalReport.DataSources.Add(rds);
        rptViewer.LocalReport.ReportPath = "ReportInvoice.rdlc";
        ReportParameter rptParam = new ReportParameter("ReportParameter1", Session["id_doc"].ToString());
        rptViewer.LocalReport.SetParameters(rptParam);
        rptViewer.LocalReport.Refresh();
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack){
            if (Session["id_doc"] != null)
            {
                GetData(Convert.ToInt64(Session["id_doc"]));
                mostraReport();
            }
        }
    }

现在代码工作正常，但我需要报告显示另一个，第二个 table。我将添加另一个数据集和另一个报告参数，但后来我对代码感到困惑。任何帮助将不胜感激。

Answer 1

我最终设法为我的报表查看器传递了两个参数。方法如下：

在设计模式中添加一个 table 适配器。
拖放您需要的 table。
按使用 SQL 指令，按查询生成器并粘贴您的查询那里。在 "Where" 条件下指定：WHERE (h.id_doc = @par1) AND (h.id_client= @par2)
在报表查看器中添加您的两个参数
设计你的report.rdlc
编写代码隐藏

</p> <pre><code>private DataTable GetData(Int64 id_doc) { DataTable dt = new DataTable(); string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionStringloginDb"].ConnectionString; try { using (var conn = new MySqlConnection(connStr)) { string sSQL = "SELECT c.*, users.*, t.*, d.* FROM head_doc h INNER JOIN doc_details d ON h.id_doc = d.id_doc INNER JOIN clients c ON c.id_client = h.id_client INNER JOIN users ON h.id_user = users.id_user WHERE (h.id_doc = @par1) AND (h.id_client = @par2)"; MySqlCommand cmd = new MySqlCommand(sSQL, conn); cmd.CommandType = CommandType.Text; cmd.Parameters.Add(new MySqlParameter("@par1", Session["id_doc"].ToString())); cmd.Parameters.Add(new MySqlParameter("@par2", Session["id_client"].ToString())); MySqlDataAdapter adp = new MySqlDataAdapter(cmd); adp.Fill(dt); } } catch (Exception ex) { lblError.Text = ex.Message; } return dt; } protected void showReport() { DataTable DataTable1 = GetData(Convert.ToInt64(Session["id_doc"].ToString())); report.LocalReport.Refresh(); report.Reset(); report.LocalReport.EnableExternalImages = true; this.report.ProcessingMode = Microsoft.Reporting.WebForms.ProcessingMode.Local; //Aggiunta dataset ReportDataSource rds2 = new ReportDataSource("DataSet2", DataTable1); report.LocalReport.DataSources.Add(rds2); //Path report.LocalReport.ReportPath = "ReportFatture.rdlc"; //Parameters ReportParameter rptParam = new ReportParameter("par1", Session["id_doc"].ToString()); ReportParameter rptParam2 = new ReportParameter("par2", Session["id_client"].ToString()); report.LocalReport.SetParameters(rptParam); report.LocalReport.SetParameters(rptParam2); report.LocalReport.Refresh(); } protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { if ((Session["id_doc"] != null) && (Session["id_client"] != null)) { showReport(); } else { Response.Redirect("/Pages/Account/Whops.aspx"); } } }

希望对您有所帮助。谢谢

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