Question

我正在尝试使用单个Crystal Report Viewer打印多个水晶报表。我有＆＃39; n＆＃39;数据库中的项目数量，我需要打印＆＃39; n＆＃39;水晶报道。由于它本质上是动态的，所以我无法修复报表查看器的数量，所以我想使用单个报表查看器并使用＆＃39; For loop＆＃39;加载水晶报表。
我在数据集中创建了一个新的数据表，我试图从另一个数据表中放入值，它没有计算出如此创建的参数字段，并通过

输入值

For Loop

这里是我的代码（我有3个参数字段，便于查看只显示一个）：

private void CRVtakeout_Load(object sender, EventArgs e)
    {
      try
           {
            string sqlqry = "Select KOTNo,Time,TableNo,WaiterName,ItemCode,ItemName,Quantity,Amount,Foodtype From tblOrder Where KOTNo=@kotno";
            SqlCommand cmd = new SqlCommand(sqlqry, connectionclass.con);
            cmd.Parameters.AddWithValue("@kotno", NewOrderBL.KOTNo);
            SqlDataAdapter adapter = new SqlDataAdapter(cmd);
            DataSet1 ds = new DataSet1();


            adapter.Fill(ds, "Takeout");
            //adapter.Fill(ds, "Takeout");
            string tableno = ds.Tables["Takeout"].Rows[i][2].ToString();
            tableno = tableno.Substring(6, 1);
            if (ds.Tables["Takeout"].Rows.Count == 0)

            {
                MessageBox.Show("No Data Found", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            else if (tableno == "T")
            {
                for (int i = 0; i < ds.Tables["Takeout"].Rows.Count; i++)
                {
                    crystalReportViewer1.RefreshReport();  
                ParameterFields paramFields = new ParameterFields();
                ParameterField paramField = new ParameterField();
                ParameterDiscreteValue paramDiscreteValue = new ParameterDiscreteValue();
                paramField.Name = "Billno";
                paramDiscreteValue.Value = ds.Tables["Takeout"].Rows[0][0].ToString();
                paramField.CurrentValues.Add(paramDiscreteValue);
                paramFields.Add(paramField);
printtakeout printtakeout = new printtakeout();
                printtakeout.SetDataSource(ds);
                crystalReportViewer1.ReportSource = printtakeout;
                System.Drawing.Printing.PrintDocument printdocument = new System.Drawing.Printing.PrintDocument();
                printtakeout.PrintOptions.PrinterName = printdocument.PrinterSettings.PrinterName;
                printtakeout.PrintOptions.PrinterName = "EPSON TM-U220 Receipt";
                printtakeout.PrintToPrinter(1, false, 0, 0);

                   }
  }
 }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, this.Text, MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
        finally { connectionclass.disconnect(); }**strong text**
}

每次我这样做都会出错：

activex control 8856f961-340a-11d0-a96b-00c04fd705a2无法实例化，因为当前线程不是单线程单元

如果我不使用参数字段他们没有错误。如果需要任何澄清，请告诉我们。谢谢。

Answer 1

有一个做查询的例子

using (SqlConnection connection = new SqlConnection("connectionString"))
            {
                connection.Open();
                SqlCommand command = new SqlCommand();
                command.CommandText = "SELECT * FROM Customers";
                command.CommandType = CommandType.Text;

                using (SqlDataReader objDataReader = command.ExecuteReader())
                {
                    if (objDataReader != null)
                    {
                        while (objDataReader.Read())
                        {
                          // To get results...
                          // objDataReader["NameResultParam"];
                        }
                    }
                }
          }

如何在c＃中使用单个Crystal Report Viewer打印多个水晶报表实例

1 个答案: