Question

编辑：我做了所以我正在执行一个sql语句而不是存储过程，只是为了调试。我现在有一个错误：没有为数据源'DataSet2'提供数据源实例。我也摆脱了ReportViewer1.Reset（）;

我试图弄清楚为什么我的报告查看器在用户点击Reports.aspx上的“RunReportButton”按钮后没有显示报告。我有一个sql语句，有2个参数：@PersonID和@Category。此sql语句搜索PersonExercise表中具有PersonID = @PersonID和@Category = Category的所有记录。我基于这个sql语句执行一个数据集，然后将它传递到我的reports.aspx后面的代码中的reportDataSource中。

然后我创建了Report1.rdlc并将其链接到我的数据集dsCardio。我将数据集中的ExerciseDate，Distance，Speed拖到Report1.rdlc上的矩阵上。当用户单击Reports.aspx上的RunReportButton时，我收到以下错误：“尚未为数据源'DataSet2'提供数据源实例”。我调试了我的代码，我看到thisDataSet.Tables [0] .Rows.Count = 3，它应该。我还为reportviewer提供了processingmode = local。有帮助吗？非常感谢！

这是我的Reports.aspx标记，它包含reportviewer：

<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">

<asp:Label ID="lblMessage" runat="server" Text="Label"></asp:Label>
<br />
<br />
<asp:DropDownList ID="DropDownList1" runat="server">
    <asp:ListItem>Cardiovascular</asp:ListItem>
    <asp:ListItem>Weight Lifting</asp:ListItem>
</asp:DropDownList>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>


<asp:Button ID="RunReportButton" runat="server" 
    onclick="RunReportButton_Click1" Text="Run Report" Height="27px" 
    Width="84px" />


<rsweb:ReportViewer ID="ReportViewer1" runat="server" Font-Names="Verdana" 
    Font-Size="8pt" InteractiveDeviceInfos="(Collection)" 
    WaitMessageFont-Names="Verdana" WaitMessageFont-Size="14pt" 
    Visible="False">
    <LocalReport ReportPath="Report1.rdlc">

    </LocalReport>
</rsweb:ReportViewer>




</asp:Content>

这是Reports.aspx.cs：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Microsoft.ApplicationBlocks.Data;
using Microsoft.Reporting.WebForms;
using System.Data.SqlClient;
using System.Data;
using System.Data.Common;
using System.Data.Sql;
using System.Configuration;

namespace ExerciseTracker2000
{
public partial class Reports : System.Web.UI.Page
{
    #region Properties

    public static string ConnectionString { get; set; }
    public static int personID { get; set; }
    #endregion

    #region Variables

    public int personID = 0;
    public SqlParameter[] SearchValue = new SqlParameter[2];

    #endregion

    #region Page Events

    protected void Page_Load(object sender, EventArgs e)
    {
        personID = CommonMethods.getLoggedInUser();        
    }

    protected void RunReportButton_Click1(object sender, EventArgs e)
    {
        try
        {
            DataSet ds = new DataSet();
            string strCategory = ddlCategory.SelectedValue;
             // strSQL select for orders with no invoices
            strSQL = "SELECT PersonID, ExerciseDate, Category, Exercise, Duration, Distance, Speed";
            strSQL = strSQL + " from dbo.PersonExercise";
            strSQL = strSQL + " where PersonID = " + personID + " And Category = '" + strCategory + "'";

            using (var connection = new SqlConnection(ConnectionString))
            {
                SqlDataAdapter ad = new SqlDataAdapter(strSQL, connection);

                ad.Fill(ds, "Table0");

            }


            //ReportViewer1.Visible is set to false in design mode
            ReportViewer1.Visible = true;
            SqlConnection thisConnection = new SqlConnection(ConnectionString);


            /* Associate thisDataSet  (now loaded with the stored 
               procedure result) with the  ReportViewer datasource */
            Microsoft.Reporting.WebForms.ReportDataSource datasource = new
            Microsoft.Reporting.WebForms.ReportDataSource("DataSetCategories_ShowExercisesByCategory", ds.Tables[0]);


            ReportViewer1.LocalReport.DataSources.Clear();
            ReportViewer1.LocalReport.DataSources.Add(datasource);

            if (thisDataSet.Tables[0].Rows.Count == 0)
            {
                lblMessage.Text = "Sorry, no products under this category!";
            }

            ReportViewer1.LocalReport.Refresh();
        }
        catch (Exception ex)
        {
            lblMessage.Text = "Error: " + ex.Message.ToString();
        }
    }

    #endregion
}  

}

Answer 1

您的报告路径在哪里 ReportViewer1.LocalReport.Path =“Report1.rdlc”;

编辑：没关系，我在XAML中看到它

EDIT2：你调用ReportViewer1.Reset（）;这是清除LocalReport。您必须再次设置报告路径。

Reportviewer无法正确显示报告

1 个答案: