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請參閱下面的代碼。我認爲這很自我解釋。我使用VS2010的Crystal Reports運行VS2010。瘋狂的事情是我有一個類似的項目與類似的代碼,不會在該行生成異常...所以我一直試圖找出兩個項目之間的差異,但到目前爲止已空。使用Report.DataSourceConnections時:「對象引用未設置爲對象的實例」
感謝您的任何建議或想法如何解決這個問題!
using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;
public partial class Reports : System.Web.UI.Page
{
ReportDocument rptSP;
protected void Page_Load(object sender, EventArgs e)
{
rptSP = new ReportDocument();
string rptPath = Server.MapPath(Request.QueryString["rptname"].ToString());
rptSP.Load(rptPath, 0);
rptSP.DataSourceConnections["MyServer\\MyInst", "MyDB"].SetConnection("MyServer\\MyInst", "MyDB", "MyUsername", "MyPass");
//The above line causes an excepton while debugging on my local development machine
如果它的事項我的aspx頁面上,我有以下:
<%@ Register Assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"
Namespace="CrystalDecisions.Web" TagPrefix="CR" %>
然後在我的web.config我有:
<add assembly="CrystalDecisions.CrystalReports.Engine, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
<add assembly="CrystalDecisions.ReportSource, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
<add assembly="CrystalDecisions.Shared, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
<add assembly="CrystalDecisions.Web, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
<add assembly="CrystalDecisions.ReportAppServer.ClientDoc, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304"/>
與其他一些水晶的DLL一起在我的BIN目錄中。