Google Chrome 中的报表查看器打印按钮

Question

据我所知，reportviewer 打印按钮在 Google Chrome 和 Firefox 中不起作用，因为它是由仅在 IE 中起作用的 ActiveX 控件制成的。因此，我尝试在报告外部制作一个 asp.net 按钮并以编程方式打印报告，但这很痛苦，我想知道是否有更简单的解决方法可以让报告在 Google Chrome 中打印。

编辑/更新：我发现这个reportviewer打印按钮应该适用于Firefox和Google Chrome，它似乎适用于Firefox，但它在Google Chrome中打印了一个空白页面。 http://cafalse.blogspot.com/2011/04/reportviewer-print-button-for-firefox.html

Answer 1

如果您不介意在页面上的某个位置添加您自己的按钮。仅当您生成报告的方式与我的类似时，此方法才有效。基本上，我获取报告，将其渲染为字节，并将这些字节作为 pdf 格式的响应发送。这会将文件打开为大多数浏览器（例如 Chrome）支持的 PDF 格式。这需要用户采取额外的步骤并单击打印。

ServerReport sr = new ServerReport();
ReportViewer.ProcessingMode = ProcessingMode.Remote;
sr = ReportViewer.ServerReport;
sr.ReportServerUrl = new Uri("http://****/****");
sr.ReportPath = "/Report";
ReportParameter paramDateFrom = new ReportParameter();
ReportParameter paramDateTo = new ReportParameter();
ReportParameter paramState = new ReportParameter();
ReportParameter paramCounty = new ReportParameter();
string dateFrom = TB_Date_From.Text;
string dateTo = TB_Date_To.Text;
string state = DDL_State.SelectedValue;
string county = DDL_County.SelectedValue;
paramDateFrom.Name = "DateFrom";
paramDateFrom.Values.Add((dateFrom != "" ? dateFrom : null));
paramDateTo.Name = "DateTo";
paramDateTo.Values.Add((dateTo != "" ? dateTo : null));
paramState.Name = "State";
paramState.Values.Add((state != "" ? Common_Functions.resolveStateID(state) : null));
paramCounty.Name = "County";
paramCounty.Values.Add((county != "" ? Common_Functions.resolveCountyID(county) : null));
ReportViewer.ServerReport.SetParameters(new ReportParameter[] { paramDateFrom, paramDateTo, paramState, paramCounty });
// DUMP PDF TO BROWSER
Warning[] warnings;
string[] streamids;
string mimeType, encoding, extension;
byte[] bytes = ReportViewer.ServerReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);
Response.Buffer = true;
Response.Clear();
Response.ContentType = mimeType;
Response.AddHeader("content-disposition", "inline; filename=myfile." + extension);
Response.BinaryWrite(bytes);
string pdfPath = Server.MapPath("~") + "pdf." + extension;
FileStream pdfFile = new FileStream(pdfPath, FileMode.Create);
pdfFile.Write(bytes, 0, bytes.Length);
pdfFile.Close();
Response.Flush();
Response.End();

Answer 2

感谢Athanasios Karagiannis

我的代码运行良好，可以将 RDLC 导出为 PDF！

// dump PDF to browser
Warning[] warnings;
string[] streamids;
string mimeType, encoding, extension;
byte[] bytes = ReportViewer.LocalReport.Render("PDF", null, out mimeType, out encoding, out extension, out streamids, out warnings);
Response.Buffer = true;
Response.Clear();
Response.ContentType = mimeType;
Response.AddHeader("content-disposition", "inline; filename=myfile." + extension);
Response.BinaryWrite(bytes);
string pdfPath = Server.MapPath("~") + "pdf." + extension;
FileStream pdfFile = new FileStream(pdfPath, FileMode.Create);
pdfFile.Write(bytes, 0, bytes.Length);
pdfFile.Close();
Response.Flush();
Response.End();