#region 报表打印
private void PrintReorpt(string OrderNumber,string ReportPath)
{
//初始化报表文件数据源
CrystalDecisions.Web.CrystalReportSource reportSource = new CrystalDecisions.Web.CrystalReportSource();
//指定报表来源
reportSource.Report.FileName = this.MapPath(ReportPath);
//初始化数据来源
DataTable dt = new DataTable();
try
{
dt = _head.GetDT_Doc(OrderNumber, Page.User.Identity.Name);
}
catch (Exception ex)
{
EA.Common.WebMessageBox.Show(this.Page, "单据打印数据异常.\\r\\n异常原因：" + EA.Common.UIHelper.JsEncode(ex.Message));
return;
}
if (dt == null || dt.Rows.Count == 0)
{
EA.Common.WebMessageBox.Show(this.Page, "该用户未被授权查看该单据或单据不存在或已删除！");
return;
}
reportSource.ReportDocument.SetDataSource(dt);
Stream sr = reportSource.ReportDocument.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
Stream sw = Response.OutputStream;
Response.Clear();
Response.ContentType = "application/octet-stream";
string filename = OrderNumber + ".pdf";
Response.AddHeader("Content-Disposition", "attachment;filename=" + filename);
byte[] buf = new byte[256];
int cnt = sr.Read(buf, 0, 256);
while (cnt > 0)
{
sw.Write(buf, 0, cnt);
Response.Flush();
cnt = sr.Read(buf, 0, 256);
}
//以下代码是必须的，除了释放内存外，另一个作用是当将再次调用该方法时，容易造成上一次的内容没被清楚，而导致第二次查看的PDF和第一次是一样的。
Response.Close();
reportSource.ReportDocument.Close();
reportSource.Dispose();
Response.End();
}
#endregion
多个报表合并为1个PDF文件的方法：
#region 报表打印
private void PrintReorpt(List<System.Data.DataTable> listTable, string ReportPath)
{
List<Stream> listStream = new List<Stream>();
CrystalDecisions.Web.CrystalReportSource reportSource=null;
foreach (System.Data.DataTable dt in listTable)
{
if (dt != null && dt.Rows.Count > 0)
{
//初始化报表文件数据源
reportSource = new CrystalDecisions.Web.CrystalReportSource();
//指定报表来源
reportSource.Report.FileName = this.MapPath(ReportPath);
reportSource.ReportDocument.SetDataSource(dt);
Stream sr = reportSource.ReportDocument.ExportToStream(CrystalDecisions.Shared.ExportFormatType.PortableDocFormat);
listStream.Add(sr);
reportSource.ReportDocument.Close();
reportSource.Dispose();
}
}
string fileName = DateTime.Now.ToString("yyyyMMddHHmmss_") + Guid.NewGuid().ToString() + ".pdf";
mergePDFFiles(listStream, fileName);
}
/// <summary> 合併PDF檔(集合) </summary>
/// <param name="fileList">欲合併PDF檔之集合(一筆以上)</param>
/// <param name="outMergeFile">合併後的檔名</param>
//我们需要引入：
using iTextSharp.text;
using iTextSharp.text.pdf;
//document.NewPage(); 这个是必须的，否则PDF没办法自动的分页。
private void mergePDFFiles(List<Stream> listStream, string fileName)
{
Document document = new Document();
int i = 0;
PdfReader reader;
string filePath = this.MapPath(pathReportOutputUrl + fileName);
PdfWriter writer = PdfWriter.GetInstance(document, new FileStream(filePath, FileMode.Create));
PdfImportedPage newPage;
document.Open();
PdfContentByte cb = writer.DirectContent;
Rectangle re = new Rectangle(595, 850);
document.SetPageSize(re);
foreach (Stream sr in listStream)
{
if (i != 0)
{
document.NewPage();
}
reader = new PdfReader(sr);
int iPageNum = reader.NumberOfPages;
for (int j = 1; j <= iPageNum; j++)
{
document.NewPage();
newPage = writer.GetImportedPage(reader, j);
cb.AddTemplate(newPage, 0, 10);
}
i++;
}
document.Close();
Stream sr1 = new FileStream(filePath, FileMode.Open);
Stream sw = Response.OutputStream;
Response.Clear();
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
byte[] buf = new byte[256];
int cnt = sr1.Read(buf, 0, 256);
while (cnt > 0)
{
sw.Write(buf, 0, cnt);
Response.Flush();
cnt = sr1.Read(buf, 0, 256);
}
sr1.Close();
try
{
File.Delete(filePath);
}
catch { }
Response.End();
}
#endregion
