传递LocalReport ReportViewer的参数 [英] Passing Parameter for LocalReport ReportViewer

问题描述

美好的一天。 我正在尝试在LocalReport模式下将参数传递给ReportViewer。 下面没有显示我在Text类型的.rdlc文件中创建了一个名为reasonCode的参数。 当我运行页面时，它会不断加载并闪烁
而且我从未看到数据。

如果我在.vb文件中注释掉以下2行报告运行正常。 这似乎以下2行是罪魁祸首，但我不知道为什么

&NBSP;的昏暗p_reasonCode作为ReportParameter =新ReportParameter（QUOT; reasonCode" ;, reasonCode）< /强>

<强>&NBSP; ReportViewer1.LocalReport.SetParameters（新泽西ReportParameter（）{p_reasonCode}）

/ Serge

以下是我的代码片段。 我错过了什么吗？ 由于事先

解决方案

通过改变的.vb代码以下&NBSP解决它。基本上只是加入&的如果不Page.IsPostBack（）然后结束如果

<跨度风格= "字体大小：0.75em">&NBSP;如果不是Page.IsPostBack（）那么

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Dim reasonCode As String =" C"

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP;会话（"reasonCode"）= reasonCode



  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; Dim p_reasonCode As ReportParameter = New ReportParameter（" reasonCode"，reasonCode）

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; ReportViewer1.LocalReport.SetParameters（New ReportParameter（）{p_reasonCode}）

  &NBSP; &NBSP; &NBSP; &NBSP; &NBSP; ReportViewer1.LocalReport.Refresh（）



   结束如果

Good Day Folks.  I'm trying to pass a parameter to the ReportViewer in  LocalReport mode.  Not shown below I've created a parameter named reasonCode in the .rdlc file of type Text.  When I run the page it continuously loads and flickers and I never see the data.

If I comment out the following 2 lines in the .vb file the report runs fine.  It seems the following 2 lines are the culprit but I don't know why.

  Dim p_reasonCode As ReportParameter = New ReportParameter("reasonCode", reasonCode)

 ReportViewer1.LocalReport.SetParameters(New ReportParameter() {p_reasonCode})

/Serge

Below is a snippet of my code.  Am I missing something ?  Thanks in advance

解决方案

Solved it by changing the .vb code to the following.  Basically just added If Not Page.IsPostBack() Then End if

  If Not Page.IsPostBack() Then

            Dim reasonCode As String = "C"
            Session("reasonCode") = reasonCode

            Dim p_reasonCode As ReportParameter = New ReportParameter("reasonCode", reasonCode)
            ReportViewer1.LocalReport.SetParameters(New ReportParameter() {p_reasonCode})
            ReportViewer1.LocalReport.Refresh()

   End If

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