ICachedReport 介面

此介面會將實作類別視為能夠存入使用 Crystal Reports SDK 之 ASP.NET Cache 物件的類別。

如需這個類型的成員清單，請參閱 ICachedReport 成員。

ICachedReport

[Visual Basic]

Public Interface ICachedReport
   Inherits System.Object

[C#]

public interface ICachedReport : System.Object

註解

若要使用預先建立的快取機制，請在您的類別上實作這個介面。ReportDocument 物件模型將會呼叫您實作的方法和屬性，以擷取快取報表所需的資訊。請將您類別的執行個體設為 CrystalReportViewer 控制項的 ReportSource 屬性以啟用快取。

範例

下列範例會建立實作 ICachedReport 介面的類別。

[Visual Basic]

      Imports System
      Imports System.ComponentModel
      Imports CrystalDecisions.CrystalReports.Engine
      Imports CrystalDecisions.ReportSource
      Imports CrystalDecisions.Shared
      
      Public Class CachedReport
         Inherits Component
         Implements ICachedReport
      
         Private blIsCacheable As Boolean
         Private blShareDBLogonInfo As Boolean
         Private tsCacheTimeOut As TimeSpan
         Private Report As New ReportDocument()
         Private reportName As String
      
         Public Sub New(ByVal s As String)
            reportName = s
         End Sub
      
         Public Overridable Property IsCacheable() As [Boolean] _
            Implements CrystalDecisions.ReportSource.ICachedReport.IsCacheable
            Get
                Return blIsCacheable
            End Get
            Set(ByVal Value As [Boolean])
                blIsCacheable = Value
            End Set
         End Property
      
         Public Overridable Property ShareDBLogonInfo() _
            As [Boolean] Implements _
            CrystalDecisions.ReportSource.ICachedReport.ShareDBLogonInfo
            Get
              Return blShareDBLogonInfo
            End Get
            Set(ByVal Value As [Boolean])
               blShareDBLogonInfo = Value
            End Set
         End Property
      
         Public Overridable Property CacheTimeOut() _
            As TimeSpan Implements _
            CrystalDecisions.ReportSource.ICachedReport.CacheTimeOut
            Get
               Return tsCacheTimeOut
            End Get
            Set(ByVal Value As TimeSpan)
               tsCacheTimeOut = Value
            End Set
         End Property
      
      
         Public Overridable Function CreateReport() _
            As ReportDocument Implements _
            CrystalDecisions.ReportSource.ICachedReport.CreateReport
            Report.Load _
               (reportName, OpenReportMethod.OpenReportByTempCopy)
            Report.Site = Me.Site
            Return Report
         End Function
      
         Public Overridable Function GetCustomizedCacheKey _
            (ByVal request As RequestContext)
            As [String] Implements _
            CrystalDecisions.ReportSource. _
            ICachedReport.GetCustomizedCacheKey
      
            Dim key As [String] = Nothing
   
            key = RequestContext.BuildCompleteCacheKey _
               (request, reportName, Me.GetType(), Me.ShareDBLogonInfo)
            Return key
         End Function
      End Class
      

[C#]

      using System;
      using System.ComponentModel;
      using CrystalDecisions.CrystalReports.Engine;
      using CrystalDecisions.ReportSource;
      using CrystalDecisions.Shared;
      
      public class CachedReport : Component, ICachedReport
      {
         protected ReportDocument Report = new ReportDocument();
         protected bool isCacheable;
         protected bool shareDBLogonInfo;
         protected string reportName;
         protected TimeSpan cacheTimeOut;
      
         public CachedReport(string s)
         {
            reportName = s;
         }
      
         public virtual Boolean IsCacheable
         {
            get
            {
               return isCacheable;
            }
            set
            {
               isCacheable = value;
            }
         }
         public virtual Boolean ShareDBLogonInfo
         {
            get
            {
               return shareDBLogonInfo;
            }
            set
            {
               shareDBLogonInfo = value;
            }
         }
      
         public virtual TimeSpan CacheTimeOut
         {
            get
            {
               return cacheTimeOut;
            }
            set
            {
               cacheTimeOut = value;
            }
         }
      
         public virtual ReportDocument CreateReport()
         {
            Report.Load
               (reportName, OpenReportMethod.OpenReportByTempCopy);
            Report.Site = this.Site;
            return Report;
         }
      
         public virtual String GetCustomizedCacheKey
            (RequestContext request)
         {
            String key = null;
      
            key = RequestContext.BuildCompleteCacheKey(
                request,
                reportName,
                this.GetType(),
                this.ShareDBLogonInfo);
             return key;
         }
      }
      

需求

命名空間 CrystalDecisions.ReportSource

組件 CrystalDecisions.ReportSource (CrystalDecisions.ReportSource.dll)

請參閱

ICachedReport 成員 | CrystalDecisions.ReportSource 命名空間

**

©2005 Business Objects SA All rights reserved