爲什麼Crystal報告要求提供數據庫登錄憑據？

我已閱讀所有關於在stackoverflow中相關的問題的答案。爲什麼Crystal報告要求提供數據庫登錄憑據？

但我無法從這些問題獲得幫助。

我的代碼

Imports System.Data.SqlClient 
Imports System.Data 
Imports System.Windows.Forms 
Imports CrystalDecisions.Shared 

Partial Class Reports_LReport 
Inherits System.Web.UI.Page 
Public Report As New CrystalDecisions.CrystalReports.Engine.ReportDocument() 
Public thisConnectionString As String = ConfigurationManager.ConnectionStrings("cnStringMain").ConnectionString 
Dim reportDocument As CrystalDecisions.CrystalReports.Engine.ReportDocument = Nothing 


Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) 
    Dim scriptManager__1 As ScriptManager = ScriptManager.GetCurrent(Me) 
    scriptManager__1.RegisterPostBackControl(Me.FactroyAttendance) 

    If Not IsPostBack = True Then 

    Else 
    LoadReport() 
    End If 
    End Sub 


Protected Sub cmdShow_Click(ByVal sender As Object, ByVal e As EventArgs) Handles cmdShow.Click 
    LoadReport() 
End Sub 


Private Sub LoadReport() 


    If Me.reportDocument IsNot Nothing Then 
     Me.reportDocument.Close() 
     Me.reportDocument.Dispose() 
    End If 
    Dim SConn As New SqlConnectionStringBuilder(ConfigurationManager.ConnectionStrings("cnStringMain").ConnectionString) 
    Dim thisConnection As New SqlConnection(thisConnectionString) 
    Dim mySelectCommand As SqlCommand = New System.Data.SqlClient.SqlCommand("prLeaveStatusReport", thisConnection) 
    mySelectCommand.CommandType = CommandType.StoredProcedure 
    reportDocument = New CrystalDecisions.CrystalReports.Engine.ReportDocument() 
    Dim reportPath As String = Server.MapPath("~/Reports/JoyLeaveReport.rpt") 
    reportDocument.Load(reportPath) 
    Dim connInfo As New CrystalDecisions.Shared.ConnectionInfo() 
    connInfo.ServerName = SConn.DataSource 
    connInfo.DatabaseName = SConn.InitialCatalog 
    connInfo.UserID = SConn.UserID 
    connInfo.Password = SConn.Password 
    Dim tableLogOnInfo As New CrystalDecisions.Shared.TableLogOnInfo() 
    tableLogOnInfo.ConnectionInfo = connInfo 
    For Each table As CrystalDecisions.CrystalReports.Engine.Table In reportDocument.Database.Tables 
     table.ApplyLogOnInfo(tableLogOnInfo) 
     table.LogOnInfo.ConnectionInfo.ServerName = connInfo.ServerName 
     table.LogOnInfo.ConnectionInfo.DatabaseName = connInfo.DatabaseName 
     table.LogOnInfo.ConnectionInfo.UserID = connInfo.UserID 
     table.LogOnInfo.ConnectionInfo.Password = connInfo.Password 
     table.Location = "dbo." + table.Location 
    Next 


    If String.IsNullOrEmpty(txtFrom.Text) Then 
     reportDocument.SetParameterValue("@dateFrom", "") 
    Else 
     reportDocument.SetParameterValue("@dateFrom", Convert.ToDateTime(txtFrom.Text).ToString("yyyy-MM-dd HH:mm:ss")) 

    End If 

    If String.IsNullOrEmpty(txtEmployeeID.Text) Then 
     reportDocument.SetParameterValue("@empId", "") 
    Else 
     reportDocument.SetParameterValue("@empId", txtEmployeeID.Text) 
    End If 


    If String.IsNullOrEmpty(txtTo.Text) Then 
     reportDocument.SetParameterValue("@dateTo", "") 
    Else 
     reportDocument.SetParameterValue("@dateTo", Convert.ToDateTime(txtTo.Text).ToString("yyyy-MM-dd HH:mm:ss")) 

    End If 

     FactroyAttendance.ReportSource = reportDocument 
     FactroyAttendance.DataBind() 
     FactroyAttendance.ReportSource = reportDocument 
     FactroyAttendance.DataBind() 



End Sub 

Protected Sub Page_Unload(ByVal sender As Object, ByVal e As EventArgs) 
    If Me.reportDocument IsNot Nothing Then 
     Me.reportDocument.Close() 
     Me.reportDocument.Dispose() 
    End If 
End Sub 
End Class

我有一個從那裏我有三個字段1.沒有fromdate 2. TODATE 3.僱員

我報告工作正常，但是當我去出口用pdf或Word報告它向我詢問參數和數據庫登錄的價值。

圖像1

圖像2

圖像3

所以，我從SI解釋儘可能多的。我怎麼解決它？並提前致謝。

來源

2017-01-03 Joy Acharya

[如何停止水晶報表查看器在打開子報表時要求登錄憑據]（http://stackoverflow.com/questions/21709438/how-to-stop-crystal-report-viewer-from-asking- login-credentials-when-opening-sub） –

torha matha sala，dekhos na upore ami likhsi je ai問題相關的問題，但我沒有得到任何幫助。 –

我看到你把登錄信息正確，所以問題可能是你不緩存你的crystalreport對象。

您需要緩存對象並將其重新綁定到網頁的Page_Init Web方法中。當你在報告中有多個頁面時，以及在我想出口時，這是必要的。

更詳細的信息在這個文檔：http://help.sap.com/businessobject/product_guides/sapCRVS2010/en/crnet13_sp14_dg_en.pdf

頁56（節1.3.3.4），例如。

來源

2017-01-03 08:44:31 Furtiro

我沒有得到幫助。我應該再次創建報告嗎？ –

您需要緩存您的crystalreport對象，然後在頁面中的init中檢索它並執行 'FactroyAttendance.ReportSource = reportDocument; FactroyAttendance.DataBind（）;' – Furtiro

解決了：只是添加一個方法。這裏FactoryAttendance是crystalViewer。 [Protected Sub .FactroyAttendance_Load（ByVal sender As Object，ByVal e As EventArgs）Handles FactroyAttendance.Load LoadReport（） End Sub] –

爲什麼Crystal報告要求提供數據庫登錄憑據？

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