带有 ReportViewer 和 Global.System.Diagnostics.DebuggerNonUserCodeAttribute 的无限循环

Question

我编写了一个简单的 webForm，其中包含 1 个文本框和一个 ReportViewer（由 Reoprt Wizard 创建）。尝试执行报告时我没有收到任何错误，但报告永远不会停止加载。我已经仔细检查了 .rdlc 文件（通过预览 .xsd 文件并显示了预期的数据。因此，我在后面的代码中设置了一个断点，以查看是否可以识别问题。不知何故，代码成功完成并刷新 ReportViewer 代码，然后进入 Designer.vb 文件运行 4 个函数，然后再次返回 ReportViewer 代码。我不明白 Designer.vb 代码中发生了什么。有人可以帮我理解什么我做错了吗？我将在后面包含 ASP.net、vb 代码以及 Designer.vb 文件中的 4 块代码。

ASP.net 代码：

    <%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/HRMaster.Master" CodeBehind="VacationSick_EmployeeReportByArea.aspx.vb" Inherits="CEI_PerformanceReviews.VacationSick_EmployeeReportByArea" %>
    <%@ Register assembly="Microsoft.ReportViewer.WebForms, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" namespace="Microsoft.Reporting.WebForms" tagprefix="rsweb" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="HRPlaceHolder" runat="server">
    <asp:Label ID="Label2" runat="server" style="z-index: 1; left: 74px; top: 215px; position: absolute" Text="Year:"></asp:Label>
    <p>
    </p>
    <asp:DropDownList ID="ddl_Year" runat="server" DataSourceID="YearChooser" DataTextField="PeriodYYYY" DataValueField="PeriodYYYY" style="z-index: 1; left: 129px; top: 214px; position: absolute">
    </asp:DropDownList>
    <asp:SqlDataSource ID="YearChooser" runat="server" ConnectionString="<%$ ConnectionStrings:CafeWorksConnectionString %>" SelectCommand="SELECT  DISTINCT PeriodYYYY
FROM    Ted.CafeWorks.dbo.FatzPeriodDates
WHERE   PeriodYYYY &gt;= (DATEPART(YEAR, GetDate())-2)
ORDER BY PeriodYYYY DESC"></asp:SqlDataSource>
    <asp:Button ID="btn_Refresh" runat="server" style="z-index: 1; left: 269px; top: 212px; position: absolute" Text="Refresh" />
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:Label ID="Label3" runat="server" Font-Bold="True" Font-Size="XX-Large" ForeColor="#000099" style="z-index: 1; left: 0px; top: 142px; position: absolute; width: 1179px; text-align: center" Text="Employee Vacation/Sick Days by Area Report"></asp:Label>
    <rsweb:ReportViewer ID="rv_EmployeeReportByArea" runat="server" Font-Names="Verdana" Font-Size="8pt" style="z-index: 1; left: 29px; top: 280px; position: absolute; height: 400px; width: 710px" WaitMessageFont-Names="Verdana" WaitMessageFont-Size="14pt">
        <LocalReport ReportEmbeddedResource="CEI_PerformanceReviews.VacationSick_ReportByArea.rdlc">
            <DataSources>
                <rsweb:ReportDataSource DataSourceId="ObjectDataSource2" Name="Dilbert_VacationSickByArea" />
            </DataSources>
        </LocalReport>
    </rsweb:ReportViewer>
    <asp:ObjectDataSource ID="ObjectDataSource2" runat="server" SelectMethod="GetData" TypeName="CEI_PerformanceReviews.Dilbert_VacationSickByAreaTableAdapters.VacationSick_CalculationsByAreaProcTableAdapter" OldValuesParameterFormatString="original_{0}">
        <SelectParameters>
            <asp:ControlParameter ControlID="ddl_Year" DefaultValue="2014" Name="Year" PropertyName="SelectedValue" Type="String" />
        </SelectParameters>
    </asp:ObjectDataSource>
    <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetData" TypeName="CEI_PerformanceReviews.Dilbert_VacationSickByAreaTableAdapters.VacationSick_CalculationsByAreaProcTableAdapter" OldValuesParameterFormatString="original_{0}">
        <SelectParameters>
            <asp:ControlParameter ControlID="ddl_Year" Name="Year" PropertyName="SelectedValue" Type="String" />
        </SelectParameters>
    </asp:ObjectDataSource>
</asp:Content>

背后的VB代码：

Imports Microsoft.Reporting.WebForms

Public Class VacationSick_EmployeeReportByArea
Inherits System.Web.UI.Page

'Declare Variables
Dim Choose_Year As String

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    'Default the Year in ddl to this year
    If (Page.IsPostBack) = False Then
        ddl_Year.SelectedValue = Now.Year
    End If

    'When the page loads, fill the report with the current year's data
    Choose_Year = ddl_Year.SelectedValue.ToString()
    rv_EmployeeReportByArea.LocalReport.ReportPath = "VacationSick\VacationSick_ReportByArea.rdlc"
    Dim Param As New ReportParameter("Year", "2014")
    rv_EmployeeReportByArea.LocalReport.SetParameters({Param})
    rv_EmployeeReportByArea.ServerReport.Refresh()
End Sub

执行 Dilbert_VacationSickByArea.Designer.vb 文件中的这 4 个代码块，然后返回到 ReportViewer 的 PageLoad 代码：

<Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
         Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Data.Design.TypedDataSetGenerator", "4.0.0.0")>  _
        Public Property ClearBeforeFill() As Boolean
            Get
                Return Me._clearBeforeFill
            End Get
            Set
                Me._clearBeforeFill = value
            End Set
        End Property


 <Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
         Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Data.Design.TypedDataSetGenerator", "4.0.0.0")>  _
        Protected Friend ReadOnly Property Adapter() As Global.System.Data.SqlClient.SqlDataAdapter
            Get
                If (Me._adapter Is Nothing) Then
                    Me.InitAdapter
                End If
                Return Me._adapter
            End Get
        End Property


 <Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
         Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Data.Design.TypedDataSetGenerator", "4.0.0.0")>  _
        Protected ReadOnly Property CommandCollection() As Global.System.Data.SqlClient.SqlCommand()
            Get
                If (Me._commandCollection Is Nothing) Then
                    Me.InitCommandCollection
                End If
                Return Me._commandCollection
            End Get
        End Property


 <Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
         Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Data.Design.TypedDataSetGenerator", "4.0.0.0")>  _
        Protected Friend ReadOnly Property Adapter() As Global.System.Data.SqlClient.SqlDataAdapter
            Get
                If (Me._adapter Is Nothing) Then
                    Me.InitAdapter
                End If
                Return Me._adapter
            End Get
        End Property


 <Global.System.Diagnostics.DebuggerNonUserCodeAttribute(),  _
         Global.System.CodeDom.Compiler.GeneratedCodeAttribute("System.Data.Design.TypedDataSetGenerator", "4.0.0.0")>  _
        Protected Friend ReadOnly Property Adapter() As Global.System.Data.SqlClient.SqlDataAdapter
            Get
                If (Me._adapter Is Nothing) Then
                    Me.InitAdapter
                End If
                Return Me._adapter
            End Get
        End Property

Answer 1

尝试只打印您的报告If Not Me.Page.IsPostBack。

您也可以删除rv_EmployeeReportByArea.ServerReport.Refresh()，因为您使用的是LocalReport。