Question

我有一个现有代码，它在reportviewer中显示reportserver RDL报告。我提示用户输入，然后将它们作为参数传递给Sql Server中的存储过程。

报告正确生成了具有硬编码文本框数量的概念证明，但显然并非所有报告都具有相同数量的参数。所以这是我的工作代码和屏幕截图：

ASP.NET

<%@ Page Language="C#" Trace="true" AutoEventWireup="true" CodeBehind="Reports.aspx.cs" Inherits="FormsAuthAd.Reports" %>

<%@ Register Assembly="Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" Namespace="Microsoft.Reporting.WebForms" TagPrefix="rsweb" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml" class="reports-body">
<head runat="server">
    <title>Reports</title>
    <link href="../css/Style.css" rel="stylesheet" />
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <div class="params-container container">
        <asp:TextBox ID="txtStart" runat="server" placeholder="From Date" class="input-fields"></asp:TextBox>
        <asp:TextBox ID="txtEnd" runat="server" placeholder="To Date" class="input-fields"></asp:TextBox>
        <asp:TextBox ID="txtBrand" runat="server" placeholder="Brand" class="input-fields"></asp:TextBox>
        <asp:TextBox ID="txtSeason" runat="server" placeholder="Season" class="input-fields"></asp:TextBox>
        <asp:TextBox ID="txtComp" runat="server" placeholder="Company" class="input-fields"></asp:TextBox>
        <asp:TextBox ID="txtLoc" runat="server" placeholder="Location" class="input-fields"></asp:TextBox>
        <asp:TextBox ID="txtLine" runat="server" placeholder="Line" class="input-fields"></asp:TextBox>
        <asp:Button ID="btnShow" runat="server" OnClick="Button1_Click" Text="Generate"  class="input-fields"/>
    </div>
    <div class="rpt-container container">
        <rsweb:ReportViewer ID="rptVwr" runat="server" CssClass="rpt-viewer"></rsweb:ReportViewer>
    </div>
    </form>
</body>
</html>

代码背后

private void showReport()
{
    rptVwr.Reset();
        DataTable dt = GetData(txtStart.Text, txtEnd.Text, txtBrand.Text, txtSeason.Text, txtComp.Text, txtLoc.Text);
        rptVwr.Visible = true;
        ReportDataSource rds = new ReportDataSource("DataSet2", dt);
        rptVwr.LocalReport.DataSources.Add(rds);
        rptVwr.LocalReport.ReportPath = "../ReportServer/StockExport.rdl";

        ReportParameter[] rptParams = new ReportParameter[]
        {
        new ReportParameter("StartDate",txtStart.Text),
                new ReportParameter("EndDate",txtEnd.Text),
                new ReportParameter("Brand",txtBrand.Text),
                new ReportParameter("Season",txtSeason.Text),
                new ReportParameter("Company",txtComp.Text),
                new ReportParameter("Store",txtLoc.Text),
        };
        rptVwr.LocalReport.SetParameters(rptParams);
        rptVwr.LocalReport.Refresh();
}

private DataTable GetData(string fromDate, string toDate, string brandCode, string seasonCode, string compCode, string locCode)
{
    DataTable dt = new DataTable();
        string connStr = System.Configuration.ConfigurationManager.ConnectionStrings ["ReportServerConnStr"].ConnectionString;
        using (SqlConnection cn = new SqlConnection(connStr))
        {
            SqlCommand cmd = new SqlCommand("sp_valueEntryStock", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.Add("@StartDate", SqlDbType.NVarChar).Value = fromDate;
                cmd.Parameters.Add("@EndDate", SqlDbType.NVarChar).Value = toDate;
                cmd.Parameters.Add("@Season", SqlDbType.NVarChar).Value = seasonCode;
                cmd.Parameters.Add("@Brand", SqlDbType.NVarChar).Value = brandCode;
                cmd.Parameters.Add("@Company", SqlDbType.NVarChar).Value = compCode;
                cmd.Parameters.Add("@Store", SqlDbType.NVarChar).Value = locCode;
                cmd.CommandTimeout = 1000;
                SqlDataAdapter adp = new SqlDataAdapter(cmd);
                adp.Fill(dt);
    }
        return dt;

}

protected void Button1_Click(object sender, EventArgs e)
{
    showReport();
}

显然，我不想要一个硬编码的文本框，所以我调整了我的代码，根据Sql Server中的表在页面加载时动态添加文本框。这是我现有的代码和截图：

Page after submitting parameters

代码背后

protected void Page_Load(object sender, EventArgs e)
{
    using (SqlConnection con = new SqlConnection(connStr))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT [FieldNum],[FieldName],[AspId],[SqlParameter] FROM [MIS_FieldsMaster]", con))
                {
                    cmd.CommandType = CommandType.Text;
                        SqlDataAdapter adp = new SqlDataAdapter(cmd);
                        adp.Fill(dtable);
                        int i = 0;
                        foreach (DataRow dr in dtable.Rows)
                        {
                            TextBox tb = new TextBox();
                            tb.ID = dr["AspId"].ToString().Trim();
                            stringArray[i] = dr["SqlParameter"].ToString().Trim();
                            tb.Text = stringArray[i];
                            ph1.Controls.Add(tb);
                            i++;
                        }
                }
    }

}

private void showReport()
{
    rptVwr.Reset();
        DataTable dt = GetData();
        rptVwr.Visible = true;
        ReportDataSource rds = new ReportDataSource("DataSet2", dt);
    rptVwr.LocalReport.DataSources.Add(rds);
    rptVwr.LocalReport.ReportPath = "../ReportServer/StockExport.rdl";
        rptVwr.LocalReport.Refresh();
}

private DataTable GetData()
{
    DataTable dt = new DataTable();
        int i = 0;

        string connStr = System.Configuration.ConfigurationManager.ConnectionStrings["ReportServerConnStr"].ConnectionString;
        using (SqlConnection cn = new SqlConnection(connStr))
        {
        SqlCommand cmd = new SqlCommand("sp_valueEntryStock", cn);
                cmd.CommandType = CommandType.StoredProcedure;
                foreach (TextBox textBox in ph1.Controls.OfType<TextBox>())
                {
                    cmd.Connection = cn;
            cmd.Parameters.AddWithValue("@" + stringArray[i], textBox.Text);
                    i++;
                }
                cmd.CommandTimeout = 1000;
                SqlDataAdapter adp = new SqlDataAdapter(cmd);
                adp.Fill(dt);
    }
            return dt;
}

protected void Button1_Click(object sender, EventArgs e)
{
    showReport();
}

所以它甚至没有向我显示任何错误消息，所以我真的不知道在哪里看。我调试了新代码，我相信它正在检索存储过程中的数据，因为局部变量显示在datatable dt下检索的行。唯一的问题是报告没有显示在reportViewer中。它甚至不显示报告工具栏。

Row retrieved from datatable dt

我非常感谢任何帮助。感谢。

Answer 1

我找出了报告未在报告查看器中显示的原因。

似乎我仍然需要添加参数并将其设置为reportviewer，就像我的第一个工作代码一样：

ReportParameter[] rptParams = new ReportParameter[]
{
new ReportParameter("StartDate",txtStart.Text),
        new ReportParameter("EndDate",txtEnd.Text),
        new ReportParameter("Brand",txtBrand.Text),
        new ReportParameter("Season",txtSeason.Text),
        new ReportParameter("Company",txtComp.Text),
        new ReportParameter("Store",txtLoc.Text),
};
rptVwr.LocalReport.SetParameters(rptParams);

显然=，它仍然需要是动态的，所以这里是我使用的代码：

List<ReportParameter> paramList = new List<ReportParameter>();
int i = 0;

foreach (TextBox textBox in ph1.Controls.OfType<TextBox>())
{
    paramList.Add(new ReportParameter(stringArray[i], textBox.Text));
    i++;
}
rptVwr.LocalReport.SetParameters(paramList);

现在，我能够生成动态文本框，同时将这些文本框中的值传递给我的sql server存储过程，最后根据相同的文本框生成并显示报告。

我会认为这已经解决了，但我脑子里只有一个琐碎的问题：

为什么我的代码在我所采用的youtube示例中的代码完全相同（至少在逻辑上，如果不是语法上）时不起作用：Two way to pass parameter in stored procedure and display the output in Report Viewer using C#

ASP.net：ReportViewer不显示（来自动态创建的文本框的参数）

1 个答案: