我的报告包含超过 1200 页,我想将其导出为 PDF。我正在使用 ASP.NET。
目前,导出需要 2 个多小时。我正在使用拉方法。我该如何优化这个过程?
ReportDocument rpt = new ReportDocument();
protected void Page_Load(object sender, EventArgs e)
{
ReportsTest dsFams = new ReportsTest();
string condition = Session["cond"].ToString();
if (!IsPostBack)
{
DataSet ds = new DataSet();
tblFA_ItemSetupTableAdapter tblItemSetup = new tblFA_ItemSetupTableAdapter();
if (condition.Contains("{tblFA_ItemSetup.ParentCatID}"))
{
tblItemSetup.FillByParentCatID(dsFams.tblFA_ItemSetup, Session["holdbranch"].ToString(), Session["ParentCat"].ToString());
ds.Tables.Add(tblItemSetup.GetDataByParentCatID(Session["holdbranch"].ToString(), Session["ParentCat"].ToString()).Copy());
}
else
{
tblItemSetup.Fill(dsFams.tblFA_ItemSetup);
ds.Tables.Add(tblItemSetup.GetData());
}
Cache["dtImages"] = ds;
}
rpt.Load(Server.MapPath("~/rptFA_ItemTag.rpt"));
rpt.SetDataSource((DataSet)Cache["dtImages"]);
CrystalReportViewer1.EnableDatabaseLogonPrompt = false;
CrystalReportViewer1.ReportSource = rpt;
}
这是按钮点击代码:
rpt.Load(Server.MapPath("~/rptFA_ItemTag.rpt"));
rpt.SetDataSource((DataSet)Cache["dtImages"]);
System.IO.Stream oStream;
byte[] byteArray = null;
oStream = rpt.ExportToStream(ExportFormatType.PortableDocFormat);
byteArray = new byte[oStream.Length];
oStream.Read(byteArray, 0, Convert.ToInt32(oStream.Length - 1));
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "application/pdf";
Response.BinaryWrite(byteArray);
Response.Flush();
Response.Close();