研究了好久，开始是嵌入aspx页面中导出的打印的，觉得这样太浪费资源了所以现在嵌入到比较不耗资源的ashx文件中，其中涉及了RDLC的导出、嵌入aspx与ashx的不同点：
以下即ashx代码：
[csharp]
using System;
using System.Collections.Generic;
using System.Web;
using Microsoft.Reporting.WebForms;
using System.Data;
using System.Data.SqlClient;
namespace V3WEB.ashx.car
{
/// <summary>
/// Tra_Docnum_CostCount_Rpt 的摘要说明
/// </summary>
public class Tra_Docnum_CostCount_Rpt : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
ExportPDF(context);
}
private DataTable LoadData(HttpContext context)
{
DataTable dt = null;
string d1 = "2012-01-01"; //Request["d1"].ToString();
string d2 = "2012-01-01"; // Request["d2"].ToString();
string dept = ""; // Request["dept"].ToString();
string carno = ""; // Request["carno"].ToString();
dt = BLL.Car.Factory.getTra_DocnumBLL().Tra_Docnum_CostCount(d1, d2, dept, carno);
return dt;
}
public void ExportPDF(HttpContext context)
{
LocalReport localReport = new LocalReport();
localReport.ReportPath = HttpContext.Current.Server.MapPath("/Report/Car/Tra_Docnum_CostCount.rdlc");
DataTable dt = LoadData(context);
ReportDataSource reportDataSource = new ReportDataSource("<span style="color:#FF0000;">DataSet1</span>", dt); //必须指定“DataSet1”为数据集中名称
localReport.DataSources.Add(reportDataSource);
string reportType = "<span style="color:#FF0000;">PDF</span>"; //可以换成EXCEL，完成EXCEL导出功能。
string mimeType;
string encoding;
string fileNameExtension;
string deviceInfo =
"<DeviceInfo>" +
" <OutputFormat>PDF</OutputFormat>" +
//" <PageWidth>8.5in</PageWidth>" +
//" <PageHeight>11in</PageHeight>" +
//" <MarginTop>0.5in</MarginTop>" +
//" <MarginLeft>1in</MarginLeft>" +
//" <MarginRight>1in</MarginRight>" +
//" <MarginBottom>0.5in</MarginBottom>" +
"</DeviceInfo>";
Warning[] warnings;
string[] streams;
byte[] renderedBytes;
//生成PDF文件到renderedBytes中
renderedBytes = localReport.Render(
reportType,
deviceInfo,
out mimeType,
out encoding,
out fileNameExtension, //可以在此设置文件名
out streams,
out warnings);
context.Response.Buffer = true;
context.Response.Clear();
context.Response.ContentType = mimeType;
context.Response.BinaryWrite(renderedBytes);
context.Response.Flush();
context.Response.End();
}
public bool IsReusable
{
get
{
return false;
}
}
}
}
备注：1、HttpContext.Current.Server.MapPath(""); 在项目中要引入"microsoft.reportview.webforms"；
2、 ReportDataSource("DataSet1", dt) 中DataSet1名字必须与RDLC中命名的文件名相同；（如下可能好理解点）
另外附上ASPX中的导出代码供对比用：
[csharp]
using System;
using System.Collections.Generic;
using System.Web;
补充：软件开发 , C# ,
