使用 C# 和 Sql 服务器创建 Crystal 报告

Question

我正在使用 Crystal 报告为我的应用程序生成报告，这是我使用的代码：

private void button5_Click(object sender, EventArgs e)
    {
        ReportDocument cryRpt = new ReportDocument();

        TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
        TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
        ConnectionInfo crConnectionInfo = new ConnectionInfo();
        Tables CrTables;

        cryRpt.Load("C:\Documents and Settings\Administrateur\Mes documents\MyApplication\MyApplication\CrystalReport1.rpt");

        crConnectionInfo.ServerName = ".\SQLEXPRESS";
        crConnectionInfo.DatabaseName = "database";
        crConnectionInfo.UserID = "";
        crConnectionInfo.Password = "";
        crConnectionInfo.IntegratedSecurity = true;
        CrTables = cryRpt.Database.Tables;

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

        cryRpt.SetDatabaseLogon("", "", ".\SQLEXPRESS", "database");
        crystalReportViewer1.ReportSource = cryRpt;
        crystalReportViewer1.Refresh();
    }

但是当我运行该应用程序时，出现了一个登录屏幕并要求提供连接 ID 和密码，我尝试输入空值但连接失败。

问题出在哪里？？

Answer 1

当我们使用 windows 资源管理器创建 crystal 报告时，我们必须提供数据库的位置 ex: "C:\data" 然后一旦它工作完美但如果我们改变数据库文件的位置或它要求登录的应用程序的位置。刷新数据源也可能会解决您的问题

考虑这个exapmle and try to resolve your problems here

Answer 2

您必须初始化 DataSet 的一个实例 class，并用来自

的信息填充它

您的数据集，因为 Crystal 报表数据源基于数据集。这是

的基本代码

使用 Crystal 报告和数据集：

SqlConnection con = new SqlConnection();
        con.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=YOUR PATH\database.mdf;Integrated Security=True;User Instance=True";
        con.Open();
        string sql = "SELECT * FROM tablename";
        SqlDataAdapter dscmd = new SqlDataAdapter(sql, con);
        DataSet ds = new DataSet();
        dscmd.Fill(ds, "tablename");
        con.Close();

        CrystalReport1 objRpt = new CrystalReport1();
        objRpt.SetDataSource(ds.Tables["tablename"]);
        crystalReportViewer1.ReportSource = objRpt;
        crystalReportViewer1.Refresh();

Answer 3

首先转到数据库专家并检查右侧是否有一个 connection.if 那里有一个或多个连接删除不需要的连接，如访问连接然后复制并粘贴下面的代码它完美地工作

 ReportDocument cryRpt = new ReportDocument();

            TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
            TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
            ConnectionInfo crConnectionInfo = new ConnectionInfo();
            Tables CrTables;

            string path = "" + Application.StartupPath + "\Mgc\Invoice.rpt";
            cryRpt.Load(path);

            cryRpt.SetParameterValue("billno", Program.billno);

            crConnectionInfo.UserID = "userid";
            crConnectionInfo.Password = "Password";
            crConnectionInfo.ServerName = "servernme";

            crConnectionInfo.DatabaseName = "database;


            CrTables = cryRpt.Database.Tables;
            foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
            {
                crtableLogoninfo = CrTable.LogOnInfo;
                crtableLogoninfo.ConnectionInfo = crConnectionInfo;
                CrTable.ApplyLogOnInfo(crtableLogoninfo);
            }


                crystalReportViewer1.ReportSource = cryRpt;
                crystalReportViewer1.Refresh();

使用 C# 和 Sql 服务器创建 Crystal 报告

Creating Crystal report with C# and Sql server

c#

crystal-reports