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protected void Button1_Click(object sender, EventArgs e)
    {

        public OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\Currently_Working\Chequedatabase.mdb;Persist Security Info=False");
        conn.Open();
        OleDbDataAdapter da = new OleDbDataAdapter("select * from tbl_cheque_data;", conn);
        DataSet ds = new DataSet();
        da.Fill(ds, "tbl_cheque_data");
        ReportDocument myReport = new ReportDocument();
        myReport.Load(Server.MapPath("Cr_online_cheque.rpt"));
        myReport.SetDataSource(ds.Tables[0]);///Take index in [] for C#
        this.CrystalReportViewer1.Visible = true;
        
        foreach (CrystalDecisions.CrystalReports.Engine.Table myTable in myReport.Database.Tables)
        {
            myLogin = myTable.LogOnInfo;
            myLogin.ConnectionInfo.ServerName = "param"; //name of PC
            myLogin.ConnectionInfo.DatabaseName = "Chequedatabase.mdb"; //name of Database
            myLogin.ConnectionInfo.Password = "";
            myLogin.ConnectionInfo.UserID = "";
            myTable.ApplyLogOnInfo(myLogin);
        } 
        CrystalReportViewer1.ReportSource = myReport;
        CrystalReportViewer1.DataBind(); 
        conn.Close(); 
        
    }