ExportToHttpResponse Crystal Report而不运行CRViewer

Question

所以我试图将水晶报告导出为pdf,而无需在我的Web应用程序的运行时查看器中使用

ExportToHttpResponse

方法.在加载参数时,一切似乎都正常运行,获取文件名/路径加载报告.但是当我执行部分时,假设创建一个弹出对话框,为用户提供保存,运行,取消选项,任何类型的下载都没有任何反应.不会抛出任何错误.它并没有踩到我所知道的代码的任何部分.它似乎运行ExportToHttpResponse行,然后不执行任何操作.

所以我希望有人可以给我一些方向,我可能会在下面的代码中做错了:

protected void ExportRptButton_Click( object sender, EventArgs e )
        {
            if ( null != SelectedReport )
            {
                rptParams.Clear();
                rptParams = null;

                // Get the report document
                // string filePath = Server.MapPath( @"~\Reports\" + SelectedReport.FileName + ".rpt" );
                // Declare a new Crystal Report Document object and load the report file into the report document.
                ReportDocument rptDoc = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
                ConfigureCrystalReports(rptDoc);
                // repDoc.Load(rptFileName);

                // AddParameters();
                // Set the report parameters the report object.
                LoadParameterFields(rptDoc);
                // Set the static text fields in the report object.
                LoadStaticTextFields(rptDoc);

                try
                {
                    if (rptDoc.IsLoaded)
                    {
                        // Stop buffering the response
                        Response.Buffer = false;
                        // Clear the response content and headers
                        Response.ClearContent();
                        Response.ClearHeaders();
                        Response.ContentType = "application/pdf";
                        // Export the Report to Response stream in PDF format and file name Customers
                        rptDoc.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, true, "DirectAccessReport");
                        // rptDoc.ExportToDisk(ExportFormatType.PortableDocFormat, "~/PDF_Folder");
                        // There are other format options available such as Word, Excel, CVS, and HTML in the ExportFormatType Enum given by crystal reports
                    }
                }
                catch ( Exception ex )
                {
                    logger.ErrorFormat("Could not export to pdf! {0}", ex);                  
                }
            }
        }

一些注意事项:上面显示的LoadParametersFields/LoadStaticTextFields方法似乎工作正常,当用于在crviewer中打开报表时,报表出现并起作用.虽然,如果你希望看到这些方法,我会根据要求抛出它们.

rptParams在开始时是私下宣布的 List<ReportParameter>()

ConfigureCrystalReports方法用于获取和加载报告的文件路径.

非常感谢任何帮助或建议.谢谢.

Answer 1

这个示例代码对我有用；看看错误管理。

protected void btnExport_Click(object sender, EventArgs e)
{
    // Stop buffering the response
    Response.Buffer = false;
    // Clear the response content and headers
    Response.ClearContent();
    Response.ClearHeaders();

    ExportFormatType format = ExportFormatType.PortableDocFormat;
    string ext =  ".pdf";
    string reportName= "myreport";

    try
    {
        reportDocument.ExportToHttpResponse(format, Response, true, reportName);
    }
    catch (System.Threading.ThreadAbortException)
    {
        //ThreadException can happen for internale Response implementation
    }
    catch (Exception ex)
    {
       //other exeptions will be managed   
       throw;
    }
}