C#实现导出pdf文件，打印




using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using BusinessFacade;
using System.IO;
using Common.Table;
using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;

public partial class Pages_ReportFile_BhXjspf_XjspfCheckList : PageBase
{
    ReportDocument myReportDoc = new ReportDocument();
    private void SetParameterValue(string strColumn, string strValue)
    {
        myReportDoc.SetParameterValue(strColumn, strValue);
    }
    protected void Page_Load(object sender, EventArgs e)
    {

        if (!Page.IsPostBack)
        {
            string strResult0 = "";
            string strResult1 = "";
            string strResult2 = "";


            string strBuildArea = string.Empty;

            string strHouseCount = string.Empty;
            string strPerBuild = string.Empty;
            string strPage = string.Empty;
            string strCount = string.Empty;

            this.CheckPageParameter();
            string strError = string.Empty;
            PrintSystem mySystem = new PrintSystem(base.UserSessionID);
            DataSet myData = new DataSet();
            myData = mySystem.mothed(this.GetSessionParameterValue("FILE_ID"), out strError);
            if (!string.IsNullOrEmpty(strError))
            {
                webTools.InsertAlert(this.Page, webTools.FilterInvalidString(strError));
                webTools.closewin(this.Page);
                return;
            }
            myData.Tables[LY_ZG_XJSPF_TABLE.LY_ZG_XJSPF_TABLENAME].Columns.Add("QRCODE", typeof(System.Byte[]));
            myData.Tables[LY_ZG_XJSPF_TABLE.LY_ZG_XJSPF_TABLENAME].Rows[0]["QRCODE"] = ProductQR(myData);

            myData.AcceptChanges();
            if (!string.IsNullOrEmpty(myData.Tables[0].Rows[0]["GZ_RESULT"].ToString()))
            {
                switch (myData.Tables[0].Rows[0]["GZ_RESULT"].ToString())
                {
                    case "0":
                        strResult0 = "√";
                        strResult1 = "×";
                        strResult2 = "×";
                        break;
                    case "1":
                        strResult1 = "√";
                        strResult0 = "×";
                        strResult2 = "×";
                        break;
                    case "2":
                        strResult2 = "√";
                        strResult0 = "×";
                        strResult1 = "×";
                        break;
                }
            }
            for (int i = 0; i < myData.Tables[LY_FAMILYHOUSEINFORMATION_TABLE.LY_FAMILYHOUSEINFORMATION_TABLENAME].Rows.Count; i++)
            {
                strHouseCount = myData.Tables[2].Rows[i]["HouseCount"].ToString();
                if (!string.IsNullOrEmpty(myData.Tables[2].Rows[i]["SumIDENTIFIEDAREA"].ToString()))
                {
                    strPerBuild = Convert.ToString(Math.Round((Convert.ToDouble(myData.Tables[2].Rows[i]["SumIDENTIFIEDAREA"].ToString()) / Convert.ToDouble(myData.Tables[0].Rows[0]["PersonCount"].ToString())), 2));
                    strBuildArea = myData.Tables[2].Rows[i]["SumIDENTIFIEDAREA"].ToString();
                }

            }
            for (int i = 0; i < myData.Tables[LY_H_RECEIVE_TABLE.LY_H_RECEIVE_TABLENAME].Rows.Count; i++)
            {
                strCount = myData.Tables[3].Rows[i]["counts"].ToString();
                strPage = myData.Tables[3].Rows[i]["pages"].ToString();
            }
            myReportDoc.Load(Server.MapPath(@"rptxjspfChecklist.rpt"));
            myReportDoc.SetDataSource(myData);//这里必须先设置数据源，然后再设置参数，否则报‘找不到参数’的错误
            myReportDoc.SetParameterValue("Result0", strResult0);
            myReportDoc.SetParameterValue("Result1", strResult1);
            myReportDoc.SetParameterValue("Result2", strResult2);


            myReportDoc.SetParameterValue("BuildArea", strBuildArea);

            myReportDoc.SetParameterValue("HouseCount", strHouseCount);
            myReportDoc.SetParameterValue("PerBuild", strPerBuild);
            myReportDoc.SetParameterValue("page", strPage);
            myReportDoc.SetParameterValue("count", strCount);

            try
            {
                DiskFileDestinationOptions myDestinationFile = new DiskFileDestinationOptions();
                string filename = "";
                filename = System.DateTime.Now.ToString("yyyyMMddhhmmssfff") + ".pdf";
                Stream stream = myReportDoc.ExportToStream(ExportFormatType.PortableDocFormat);
                byte[] bytes = new byte[stream.Length];
                stream.Read(bytes, 0, bytes.Length);

                stream.Close();

                String contentType = "application/octet-stream";

                Response.Clear();
                Response.ClearContent();
                Response.ClearHeaders();
                Response.Buffer = false;
                Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);
                Response.AddHeader("Content-Length", bytes.Length.ToString());
                Response.Charset = "GB2312";
                Response.ContentType = contentType;
                Response.BinaryWrite(bytes);
                Response.Flush();
                Response.End();
            }
            catch (System.Exception exp)
            {
                throw exp;
            }
        }
    }
    private byte[] ProductQR(DataSet myData)
    {
        DataTable mytable = myData.Tables[0];
        string strFILE_ID = mytable.Rows[0][LY_ZG_XJSPF_TABLE.FILE_ID_FIELD].ToString().Trim();
        string strRegister_num = mytable.Rows[0][LY_ZG_XJSPF_TABLE.REGISTER_NUM_FIELD].ToString().Trim();

        #region 设置QR码
        string strCode = strRegister_num + "\r\n";//"审核表编号:"  +         
        strCode += strFILE_ID + "\r\n";//"收件号:" +       
        QRCode.Service1 QrCode = new QRCode.Service1();
        return QrCode.GetQrCode(strCode);
        #endregion
    }
    private void Page_UnLoad(object sender, System.EventArgs e)
    {
        if (myReportDoc != null)
        {
            myReportDoc.Close();
            myReportDoc.Dispose();
        }
    }
}
1.注意rpt中的数据库专家中的xsd文件的类名必须和访问数据库返回的表名必须相同，否则会报登录数据库失败的错误
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