[英]How to print multiple instance of crystal report using single Crystal Report Viewer in c#
我正在嘗試使用單個Crystal Report Viewer打印多個Crystal報表。 我的數據庫中有n個項目,我需要打印n個水晶報表。 由於它本質上是動態的,因此我無法確定Report Viewer的數量,因此我考慮使用單個Report Viewer並使用“ For循環”加載Crystal報表。
我在數據集中創建了一個新的數據表,而我試圖從另一個數據表中獲取值,但該數據表無法解決,因此創建了參數字段,並通過
對於循環
這是我的代碼(我有3個參數字段,以便於查看,僅顯示一個):
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**
}
每次我這樣做都會出錯:
由於當前線程不是單線程單元,因此無法實例化activex控件8856f961-340a-11d0-a96b-00c04fd705a2
如果我不使用參數字段,則不會出錯。 如果需要任何澄清,請告訴。 謝謝 。
有一個做查詢的例子
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"];
}
}
}
}
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