c# - 如何为水晶报表设置数据库登录信息（连接信息）？

Question

我有一个应用程序（不是我的编码），它有很多水晶报告。我面临的问题是，每次我打开水晶报告时，它都会询问登录用户名和密码。

经过一番搜索后，我发现我必须在运行时为报告设置连接信息，并且我找到了一些解决方案，但是当我查看应用程序的代码时，并没有像我预期的那样找到它。

frmviewrpt（具有水晶报表查看器的表单）有这样的东西：

RptProBalance rptProductBalance = new RptProBalance();
rptProductBalance.RecordSelectionFormula = getBalanceRptSelection();
rptProductBalance.Refresh();
allReportViewer.ReportSource = rptProductBalance;

RptProBalance()（从 RptProBalance.rpt 文件扩展的 cs 文件）：

//------------------------------------------------------------------------------
 // <auto-generated>
 //     This code was generated by a tool.
 //     Runtime Version:2.0.50727.42
 //
 //     Changes to this file may cause incorrect behavior and will be lost if
 //     the code is regenerated.
 // </auto-generated>
 //------------------------------------------------------------------------------

 namespace minfatora {
using System;
using System.ComponentModel;
using CrystalDecisions.Shared;
using CrystalDecisions.ReportSource;
using CrystalDecisions.CrystalReports.Engine;


public class RptProBalance : ReportClass {

    public RptProBalance() {
    }

    public override string ResourceName {
        get {
            return "RptProBalance.rpt";
        }
        set {
            // Do nothing
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section ReportHeaderSection1 {
        get {
            return this.ReportDefinition.Sections[0];
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section PageHeaderSection1 {
        get {
            return this.ReportDefinition.Sections[1];
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section GroupHeaderSection1 {
        get {
            return this.ReportDefinition.Sections[2];
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section DetailSection1 {
        get {
            return this.ReportDefinition.Sections[3];
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section GroupFooterSection1 {
        get {
            return this.ReportDefinition.Sections[4];
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section ReportFooterSection1 {
        get {
            return this.ReportDefinition.Sections[5];
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public CrystalDecisions.CrystalReports.Engine.Section PageFooterSection1 {
        get {
            return this.ReportDefinition.Sections[6];
        }
    }
}

[System.Drawing.ToolboxBitmapAttribute(typeof(CrystalDecisions.Shared.ExportOptions), "report.bmp")]
public class CachedRptProBalance : Component, ICachedReport {

    public CachedRptProBalance() {
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public virtual bool IsCacheable {
        get {
            return true;
        }
        set {
            // 
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public virtual bool ShareDBLogonInfo {
        get {
            return false;
        }
        set {
            // 
        }
    }

    [Browsable(false)]
    [DesignerSerializationVisibilityAttribute(System.ComponentModel.DesignerSerializationVisibility.Hidden)]
    public virtual System.TimeSpan CacheTimeOut {
        get {
            return CachedReportConstants.DEFAULT_TIMEOUT;
        }
        set {
            // 
        }
    }

    public virtual CrystalDecisions.CrystalReports.Engine.ReportDocument CreateReport()      {
        RptProBalance rpt = new RptProBalance();
        rpt.Site = this.Site;
        return rpt;
    }

    public virtual string GetCustomizedCacheKey(RequestContext request) {
        String key = null;
        // // The following is the code used to generate the default
        // // cache key for caching report jobs in the ASP.NET Cache.
        // // Feel free to modify this code to suit your needs.
        // // Returning key == null causes the default cache key to
        // // be generated.
        // 
        // key = RequestContext.BuildCompleteCacheKey(
        //     request,
        //     null,       // sReportFilename
        //     this.GetType(),
        //     this.ShareDBLogonInfo );
        return key;
    }
}
 }

我不知道我应该在哪里建立连接信息并将其传递给报告。

score 5 · Accepted Answer

ConnectionInfo crconnectioninfo = new ConnectionInfo();
    ReportDocument cryrpt = new ReportDocument();
    TableLogOnInfos crtablelogoninfos = new TableLogOnInfos();
    TableLogOnInfo crtablelogoninfo = new TableLogOnInfo();

    Tables CrTables;

    crconnectioninfo.ServerName = "localhost";
    crconnectioninfo.DatabaseName = "dbclients";
    crconnectioninfo.UserID = "ssssssss";
    crconnectioninfo.Password = "xxxxxxx";  


  cryrpt.Load(Application.StartupPath + "\\rpts\\" + dealerInfo.ResourceName);

        CrTables = cryrpt.Database.Tables;

        foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
        {
            crtablelogoninfo = CrTable.LogOnInfo;
            crtablelogoninfo.ConnectionInfo = crconnectioninfo;
            CrTable.ApplyLogOnInfo(crtablelogoninfo);
        }


        cryrpt.RecordSelectionFormula = getCustInfoRptSelection();
        cryrpt.Refresh();

        allReportViewer.ReportSource = cryrpt;

score 2 · Accepted Answer

如果您想通过代码提供它，那么在您的情况下，您似乎会进入调用您的 .rpt 文件的数据源并将其设置在那里。这是我在 VB.Net 中的博客中的一个示例。此代码将遍历所有子报表和主报表并更新连接字符串（假设所有报表/子报表都连接到同一个数据库，如果没有，您可以使用此代码片段来更新各个子报表）。

它将像这样使用（尽管您可能绑定到查看器而不是导出，因此您可以忽略它，这只是示例）。

    Using rd As New ReportDocument
        rd.Load("C:\Temp\CrystalReports\InternalAccountReport.rpt")
        rd.ApplyNewServer("serverName or DSN", "databaseUsername", "databasePassword")
        rd.ApplyParameters("AccountNumber=038PQRX922;", True)
        rd.ExportToDisk(ExportFormatType.PortableDocFormat, "c:\temp\test.pdf")
        rd.Close()
    End Using

    System.Diagnostics.Process.Start("c:\temp\test.pdf")

这是扩展方法模块：

Imports System.Runtime.CompilerServices
Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Imports CrystalDecisions.CrystalReports

Namespace Extensions

''' <summary>
''' A set of extension methods to make manually working with Crystal Reports easier.
''' </summary>
''' <remarks>
''' Pieces of this code started in March of 2004 and have evolved over the last 8 years.
''' </remarks>
Public Module CrystalReportExtensions

    '*********************************************************************************************************************
    '
    '            Module:  CrystalReportExtensions
    '      Initial Date:  03/26/2004
    '      Last Updated:  05/22/2012
    '     Programmer(s):  Blake Pell
    '
    '*********************************************************************************************************************

    ''' <summary>
    ''' Applies a new server name, SQL username and password to a ReportDocument.  This method can be used with any number
    ''' of database providers.
    ''' </summary>
    ''' <remarks></remarks>
    <Extension()> _
    Public Sub ApplyNewServer(ByVal report As ReportDocument, serverName As String, username As String, password As String)

        For Each subReport As ReportDocument In report.Subreports
            For Each crTable As Table In subReport.Database.Tables
                Dim loi As TableLogOnInfo = crTable.LogOnInfo
                loi.ConnectionInfo.ServerName = serverName
                loi.ConnectionInfo.UserID = username
                loi.ConnectionInfo.Password = password
                crTable.ApplyLogOnInfo(loi)
            Next
        Next

        'Loop through each table in the report and apply the new login information (in our case, a DSN)
        For Each crTable As Table In report.Database.Tables
            Dim loi As TableLogOnInfo = crTable.LogOnInfo
            loi.ConnectionInfo.ServerName = serverName
            loi.ConnectionInfo.UserID = username
            loi.ConnectionInfo.Password = password

            crTable.ApplyLogOnInfo(loi)
            'If your DatabaseName is changing at runtime, specify the table location. 
            'crTable.Location = ci.DatabaseName & ".dbo." & crTable.Location.Substring(crTable.Location.LastIndexOf(".") + 1)
        Next

    End Sub

    ''' <summary>
    ''' Applies a new server name to the ReportDocument.  This method is SQL Server specific if integratedSecurity is True.
    ''' </summary>
    ''' <param name="report"></param>
    ''' <param name="serverName">The name of the new server.</param>
    ''' <param name="integratedSecurity">Whether or not to apply integrated security to the ReportDocument.</param>
    ''' <remarks></remarks>
    <Extension()> _
    Public Sub ApplyNewServer(report As ReportDocument, serverName As String, integratedSecurity As Boolean)

        For Each subReport As ReportDocument In report.Subreports
            For Each crTable As Table In subReport.Database.Tables
                Dim loi As TableLogOnInfo = crTable.LogOnInfo
                loi.ConnectionInfo.ServerName = serverName

                If integratedSecurity = True Then
                    loi.ConnectionInfo.IntegratedSecurity = True
                End If

                crTable.ApplyLogOnInfo(loi)
            Next
        Next

        'Loop through each table in the report and apply the new login information (in our case, a DSN)
        For Each crTable As Table In report.Database.Tables
            Dim loi As TableLogOnInfo = crTable.LogOnInfo
            loi.ConnectionInfo.ServerName = serverName

            If integratedSecurity = True Then
                loi.ConnectionInfo.IntegratedSecurity = True
            End If

            crTable.ApplyLogOnInfo(loi)
            'If your DatabaseName is changing at runtime, specify the table location. 
            'crTable.Location = ci.DatabaseName & ".dbo." & crTable.Location.Substring(crTable.Location.LastIndexOf(".") + 1)
        Next

    End Sub

    ''' <summary>
    ''' Applies a new database name to all of the tables in the Crystal Report.  If you do not wish to use a schemaName, pass
    ''' a blank string in for it.
    ''' </summary>
    ''' <param name="report">The Crystal Report document.</param>
    ''' <param name="databaseName">The name of the database.</param>
    ''' <param name="schemaName">The schema name if necessary.  If this is not needed, pass a blank in.</param>
    ''' <remarks>Depending on your database server, this may require a schema also.  For instance, in SQL Server
    ''' you may need NorthWind.dbo. </remarks>
    <Extension()> _
    Public Sub ApplyNewDatabaseName(ByVal report As ReportDocument, databaseName As String, schemaName As String)
        Dim prefix As String = ""

        If schemaName <> "" Then
            prefix = String.Format("{0}.{1}.", databaseName, schemaName)
        Else
            prefix = String.Format("{0}.", databaseName)
        End If

        'Loop through each table in the report and apply the new database name
        For Each crTable As Table In report.Database.Tables
            'If your DatabaseName is changing at runtime, specify the table location. 
            crTable.Location = String.Format("{0}{1}", prefix, crTable.Location.Substring(crTable.Location.LastIndexOf(".") + 1))
        Next
    End Sub

    ''' <summary>
    ''' Sets the Username, Password and ServerName property and/or the UseTrustedConnection property with the values listed in the
    ''' provided connection string.  Currently, only Sql Server is supported for automatically loading values from a connection
    ''' string.
    ''' </summary>
    ''' <param name="sqlConnectionString"></param>
    ''' <remarks></remarks>
    <Extension()> _
    Public Sub ApplyCredentialsFromConnectionString(report As ReportDocument, ByVal sqlConnectionString As String)
        ' Apply the connection information from the web.config file.
        Dim cb As New System.Data.SqlClient.SqlConnectionStringBuilder(sqlConnectionString)

        If cb.IntegratedSecurity = False Then
            ApplyNewServer(report, cb.DataSource, cb.UserID, cb.Password)
        Else
            ApplyNewServer(report, cb.DataSource, True)
        End If
    End Sub

    ''' <summary>
    ''' Checks to see if a parameter name exists in the reports parameter fields.  This only checks the top level of
    ''' the report.  The top level should propagate down any parameters that need to be passed down.
    ''' </summary>
    ''' <param name="paramName"></param>
    ''' <param name="report"></param>
    ''' <returns></returns>
    ''' <remarks></remarks>
    <Extension()> _
    Public Function DoesParameterExist(ByVal report As ReportDocument, ByVal paramName As String) As Boolean

        If report Is Nothing Or report.ParameterFields Is Nothing Then
            Return False
        End If

        For Each param As ParameterField In report.ParameterFields
            If paramName = param.Name Then
                Return True
            End If
        Next

        Return False
    End Function

    ''' <summary>
    ''' Takes a parameter string and places them in the corresponding parameters for the report.  The parameter string must 
    ''' be semi-colon delimited with the parameter inside of that delimited with an equal sign.  E.g.<br /><br />
    ''' 
    ''' <code>
    ''' lastName=Pell;startDate=1/1/2012;endDate=1/7/2012
    ''' </code>
    ''' 
    ''' </summary>
    ''' <param name="report">The Crystal Reports ReportDocument object.</param>
    ''' <param name="parameters">A parameter string representing name/values.  See the summary for usage.</param>
    ''' <remarks></remarks>
    <Extension()> _
    Public Sub ApplyParameters(report As ReportDocument, parameters As String)
        ApplyParameters(report, parameters, False)
    End Sub

    ''' <summary>
    ''' Takes a parameter string and places them in the corresponding parameters for the report.  The parameter string must 
    ''' be semi-colon delimited with the parameter inside of that delimited with an equal sign.  E.g.<br /><br />
    ''' 
    ''' <code>
    ''' lastName=Pell;startDate=1/1/2012;endDate=1/7/2012
    ''' </code>
    ''' 
    ''' </summary>
    ''' <param name="report">The Crystal Reports ReportDocument object.</param>
    ''' <param name="parameters">A parameter string representing name/values.  See the summary for usage.</param>
    ''' <param name="removeInvalidParameters">If True, parameters that don't exist in the Crystal Report will
    ''' be removed.  If False, these parameters will be left in and an exception will be thrown listing
    ''' the offending parameter name.</param>
    ''' <remarks></remarks>
    <Extension()> _
    Public Sub ApplyParameters(report As ReportDocument, parameters As String, removeInvalidParameters As Boolean)

        ' No parameters (or valid parameters) were provided.
        If String.IsNullOrEmpty(parameters) = True Or parameters.Contains("=") = False Then
            Exit Sub
        End If

        ' Get rid of any trailing or leading semi-colons that would mess up the splitting.
        parameters = parameters.Trim(";")

        ' The list of parameters split out by the semi-colon delimiter
        Dim parameterList As String() = parameters.Split(Chr(Asc(";")))

        For Each parameter As String In parameterList
            ' nameValue(0) = Parameter Name, nameValue(0) = Value
            Dim nameValue As String() = parameter.Split(Chr(Asc("=")))

            ' Validate that the parameter exists and throw a legit exception that describes it as opposed to the
            ' Crystal Report COM Exception that gives you little detail.  
            If report.DoesParameterExist(nameValue(0)) = False And removeInvalidParameters = False Then
                Throw New Exception(String.Format("The parameter '{0}' does not exist in the Crystal Report.", nameValue(0)))
            ElseIf report.DoesParameterExist(nameValue(0)) = False And removeInvalidParameters = True Then
                Continue For
            End If

            ' The ParameterFieldDefinition MUST be disposed of otherwise memory issues will occur, that's why
            ' we're going the "using" route.  Using should Dispose of it even if an Exception occurs.
            Using pfd As ParameterFieldDefinition = report.DataDefinition.ParameterFields.Item(nameValue(0))
                Dim pValues As ParameterValues
                Dim parm As ParameterDiscreteValue
                pValues = New ParameterValues

                parm = New ParameterDiscreteValue
                parm.Value = nameValue(1)

                pValues.Add(parm)
                pfd.ApplyCurrentValues(pValues)
            End Using
        Next

    End Sub

End Module

End Namespace

score 0 · Accepted Answer

听起来数据源是在 .rpt 文件中设置的。在水晶报表设计器中打开 .rpt 文件（如果您有插件，则打开 VS）并选择“验证数据库”。一旦你提供了这些信息并保存了，它就不应该再这样做了。自原始设置以来，密码可能已更改。

c# - 如何为水晶报表设置数据库登录信息（连接信息）？

3 回答 3

Related

Reference