Question

我在.aspx pahe中有字段nammed RPTHtml而没有runat =“server”

 <asp:HiddenField ID="RPTHtml"  />

在javascript中添加此代码并调用此页面的页面方法

document.getElementById('RPTHtml').setValue =window.encodeURI
(document.getElementById(eval(result)[0].columnLineConfig.divToRender).innerHTML);
PageMethods.getHTMLToPdf(eval(result)[0].columnLineConfig.divToRender, srcurl);

现在，在我的页面方法

中

<WebMethod()> _
     <System.Web.Script.Services.ScriptMethod()> _
     Public Shared Function getHTMLToPdf(ByVal div As String, ByVal InnerHTMl As String) As Boolean

    Dim pdfDocument As PdfDocument.Document = Nothing
    Dim pdfConverter As PdfConverter = New PdfConverter()
    Dim pdfBytes As Byte() = Nothing

    Dim strHtml As String = ""
    Dim htmlreport As String = ""
    Dim ReportFileName As String = ""
    Dim Response_1 As HttpResponse = System.Web.HttpContext.Current.Response


    If InnerHTMl.ToString() = "" Then
        Exit Function
    End If
    htmlreport = InnerHTMl.ToString()



    htmlreport = HttpUtility.UrlDecode(htmlreport)

    Response_1.Clear()
    Response_1.Buffer = True
    Response_1.ClearContent()
    Response_1.ClearHeaders()

    ReportFileName = GetReportName() + ".pdf"

    pdfConverter = New Winnovative.WnvHtmlConvert.PdfConverter()

    pdfConverter.AvoidImageBreak = True
    pdfConverter.AvoidTextBreak = True
    pdfConverter.TruncateOutOfBoundsText = True
    pdfConverter.LicenseKey = "LicenseKey"
    pdfConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4
    pdfConverter.PdfDocumentOptions.StretchToFit = True

    pdfBytes = pdfConverter.GetPdfBytesFromHtmlString(htmlreport)

    Response_1.AddHeader("Content-type", "application/pdf")
    Response_1.AddHeader("Content-Disposition", "attachment; filename=" + ReportFileName)

    Response_1.BinaryWrite(pdfBytes)
    Response_1.Flush()
    Response_1.End()        
End Function

它没有提供任何输出，只是成功运行，但没有发生下载pdf的提示。

我错过了什么？或者它无法通过pagemethod实现。提前谢谢!!!

Answer 1

在您的asp.net页面中提供一个链接，如

      <a href="javascript:ExportReport();">Export To Excel</a>

在javascript中（我使用jquery做同样的事情），动态创建HTML表单并提交它，Export.aspx是生成pdf的页面

   function ExportReport() {                            
                        var frmT = $([
                            '<form id="frmExport" method="post" action="Export.aspx" target="_blank" style="display:none;">',
                                '<input type="hidden" name="pdfContents" id="tableContents" />',                                    
                            '</form>'

                        ].join('')).appendTo('body')[0]
                        var hdnTbl = $("#pdfContents", frmT);
                        hdnTbl.val( divRep.html() ); //  divRep.html() is the inner html you want to convert to PDF

                        frmT.submit();

                    }

由于您要在隐藏字段中提交HTML，因此您需要在ValidateRequest页面中启用Export.aspx属性

        ValidateRequest="false"

另外，你需要在web.config中启用maxrequestlength，如下所示，

        <httpRuntime requestValidationMode="2.0" maxRequestLength="1024" />  <!-- 1024 kb  -->

在</system.web>结束标记之前

。如果您使用的是.net 2.0，则可以省略requestValidationMode="2.0"属性。您可以在export.aspx页面加载方法中使用相同的getHTMLToPdf方法代码。希望这会有所帮助。

响应不提供任何输出下载PDF

1 个答案: