获取报告参数作为 URL 字符串

Question

我有一个提供 SSRS 报告的应用程序。通过以下方式访问给定的报告：

https://reportserver.com/reportname

单击查看报告后，将使用用户定义的参数将回发提交到报告服务器。我需要抓取这些用户定义的参数并将它们解析为 URL 字符串。

想要的结果： https://reportserver.com/reportname?param1=foo&param2=bar

我找到了this doc，这让我接近了我需要的东西。这个方法应该允许我获取所有可见参数并自己解析它们，但我也需要隐藏参数。

如何构建这个参数字符串？我们在前端使用 JavaScript/jQuery，因此可能会在 POST 之前抓取这个客户端，但我也没有找到这样做的方法。

Answer 1

我让它工作了。公平警告：我是 ASP.NET 新手，所以这可能不是一个理想的解决方案。

我在报表查看器控件的代码后面添加了一个事件处理程序。这会查询执行日志，获取用户最近选择的参数。当单击一个名为“保存报告”的按钮时会触发它。如果您尝试使用 Load 或 PreRender 事件处理程序来处理此问题，它将在该行有机会插入数据库之前触发，从而为您提供用户第二个最近执行参数的结果。

定义按钮（.ascx 文件）

  <asp:LinkButton ID="SaveReportButton" runat="server" title="Save this Report"></asp:LinkButton>

将事件处理程序添加到代码后面（.ascx.vb 文件）

Protected Sub SaveReportButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SaveReportButton.Click
  Dim conn As New SqlConnection(<connection string here>)
  Dim cmd As New SqlCommand("SELECT TOP 1 Parameters FROM [ReportServer].[dbo].[ExecutionLogStorage] WHERE <qualify on user, timestamp, etc. here>", conn)
  cmd.Parameters.AddWithValue(<query parameter here>)
  conn.Open()
  Dim result = cmd.ExecuteScalar()

  ' Prevents NullReferenceException from result.ToString() in case no result is found
  If (result IsNot Nothing)

    ' Redirect based on parameter string retrieved from log
    Response.Redirect(HttpContext.Current.Request.Url.AbsoluteUri & "?" & result.ToString())

  End If
  conn.Close()
End Sub

点击按钮时从 JavaScript 调用回发

<li>
  <a href=\'javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(<reference SaveReportButton with appropriate arguments>)\' id="SaveReportButton" title="Save Report">
  Save Report
  </a>
</li>

WebForm_DoPostBackWithOptions() 和 WebForm_PostBackOptions() 上的文档很少，但一位同事已经这样做了，所以我照做了 为了保持一致性，因为它有效。

Answer 2

我用 3 种不同的方式为带有参数的报告创建了 URL。前两者的结合可能会让您更接近解决您的问题。

在报告属性中使用自定义代码。

Public Function ShowParameterValues(ByVal parameter As Parameter) As String  
Dim s as String = String.Empty 
    Try
       If parameter.IsMultiValue then  
          s = "Multivalue: "   
          For i as integer = 0 to parameter.Count-1  
             s = s + CStr(parameter.Value(i)) + " "   
          Next  
       Else  
          s = "Single value: " + CStr(parameter.Value)  
       End If  
       Return s  

    Catch ex As Exception
        Return "error"

    End Try

End Function  

或

在报告中使用超链接。

=Globals!ReportServerUrl + "/ReportServer?" 
 + Replace(Globals!ReportFolder, " ", "+") + "%2f" 
 + Replace(Globals!ReportName, " ", "+") + "&rs:Command=Render"
 + "&boolean_value=" + CStr(Parameters!boolean_value.Value)
 + "&single_value_parameter=" + Parameters!single_value_parameter.Value 
 + "&multi_value_parameter=" + Join(Parameters!multi_value_parameter.Value, "&multi_value_parameter=") 
 + IIf(IsNothing(Parameters!week_date_start.Value), "&week_date_start:isnull=True", "&week_date_start=" & Format(Parameters!week_date_start.Value, Variables!FormatDate.Value))
 + IIf(IsNothing(Parameters!week_date_end.Value), "&week_date_end:isnull=True", "&week_date_end=" & Format(Parameters!week_date_end.Value, Variables!FormatDate.Value))

另外，我通常将其添加为报表变量，然后您可以为无需更改的页脚创建一个标准文本框。

=Variables!UrlReportWithParameters.Value

或

使用执行日志。查看专栏URL_Report_Filtered

--Purpose:  to search the reporting services execution log

DECLARE @all_value AS VARCHAR(10) = '<ALL>';
DECLARE @LogStatus AS VARCHAR(50) = '<ALL>';
DECLARE @ReportFolder AS VARCHAR(450) = 'Testing';
DECLARE @ReportName AS VARCHAR(450) = '<ALL>';
DECLARE @UserName AS VARCHAR(260) = '<ALL>';
DECLARE @GroupByColumn AS VARCHAR(50) = 'Report Folder';
DECLARE @StartDate AS DATETIME = NULL;
DECLARE @EndDate AS DATETIME = NULL;

WITH
report_users 
AS
(
    SELECT 
          [UserID]
        , [UserName]
        , [SimpleUserName] = UPPER(RIGHT([UserName], (LEN([UserName])-CHARINDEX('\',[UserName])))) 
    FROM 
        [dbo].[Users]
)
,
report_catalog
AS
(
    SELECT    
          rpt.[ItemID]
        , rpt.[CreatedById]
        , rpt.[ModifiedById]
        , rpt.[Type]
        , rpt.[Name] 
        , [ReportName] = rpt.[Name] 
        , rpt.[Description]
        , rpt.[Parameter]
        , [CreationDate] = CONVERT(DATETIME, CONVERT(VARCHAR(11), rpt.[CreationDate], 13))
        , [ModifiedDate] = CONVERT(DATETIME, CONVERT(VARCHAR(11), rpt.[ModifiedDate], 13))
        , [ReportFolder] = SUBSTRING(rpt.[Path], 2, LEN(rpt.[Path])-LEN(rpt.[Name])-2) 
        , rpt.[Path]
        , [URL_ReportFolder] = 'http://' + Host_Name() + '/Reports/Pages/Report.aspx?ItemPath=%2f'  + SUBSTRING(rpt.[Path], 2, LEN(rpt.[Path])-LEN(rpt.[Name])-2)  + '&ViewMode=List'
        , [URL_Report] = 'http://' + Host_Name() + '/Reports/Pages/Report.aspx?ItemPath=%2f'  + SUBSTRING(rpt.[Path], 2, LEN(rpt.[Path])-LEN(rpt.[Name])-2)  + '%2f' + rpt.[Name]
        , [ReportDefinition] = CONVERT(VARCHAR(MAX), CONVERT(VARBINARY(MAX), rpt.[Content]))  
        , [HostName] = Host_Name()
    FROM 
        [dbo].[Catalog] AS rpt
    WHERE 
        1=1
        AND rpt.[Type] = 2
)
SELECT 
    [GroupBy1] = 
        CASE  
            WHEN @GroupByColumn = 'Report Name' THEN rpt.[ReportName]
            WHEN @GroupByColumn = 'Report Folder' THEN rpt.[ReportFolder]
            WHEN @GroupByColumn = 'User Id' THEN usr.[SimpleUserName]
            ELSE '<N/A>' 
        END
    , rpt.[Path]
    , rpt.[ReportFolder]
    , rpt.[Name]
    , rpt.[URL_ReportFolder]
    , rpt.[URL_Report] 
    , [URL_Report_Filtered] = rpt.[URL_Report] + '&rs:Command=Render&' + CONVERT(VARCHAR(max), el.[Parameters])
    , [UserName] = usr.[SimpleUserName]
    , el.[Status]
    , el.[TimeStart]
    , el.[RowCount]
    , el.[ByteCount]
    , el.[Format]
    , el.[Parameters]
    , [TotalSeconds] = CONVERT(CHAR(8),DATEADD(ms,(el.[TimeDataRetrieval] + el.[TimeProcessing] + el.[TimeRendering]),0),108)
    , [TimeDataRetrieval] = CONVERT(CHAR(8),DATEADD(ms,el.[TimeDataRetrieval],0),108) 
    , [TimeProcessing] = CONVERT(CHAR(8),DATEADD(ms,el.[TimeProcessing],0),108)  
    , [TimeRendering] = CONVERT(CHAR(8),DATEADD(ms,el.[TimeRendering],0),108) 
    , [OrderbyDate] = CAST([TimeStart] AS DATETIME) 
FROM 
    report_catalog AS rpt 
    LEFT JOIN [dbo].[ExecutionLog] AS el ON el.[ReportID] = rpt.[ItemID]
    LEFT JOIN report_users AS usr ON el.[UserName] = usr.[UserName]
WHERE 
    1=1
    AND (@all_value IN(@LogStatus) OR el.[Status] IN(@LogStatus))
    AND (@all_value IN (@ReportFolder) OR rpt.[ReportFolder] IN(@ReportFolder))
    AND (@all_value IN(@ReportName) OR rpt.[ReportName] IN(@ReportName))
    AND (@all_value IN(@UserName) OR usr.[SimpleUserName] IN(@UserName))
    AND (@StartDate IS NULL OR CONVERT(DATETIME, CONVERT(VARCHAR(11), el.[TimeStart], 13)) >= @StartDate)
    AND (@EndDate IS NULL OR CONVERT(DATETIME, CONVERT(VARCHAR(11), el.[TimeStart], 13)) <= @EndDate)