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    文檔首頁>>FastReport.Net教程2020(持續(xù)更新中)>>報告生成器FastReport .NET實踐指南:如何創(chuàng)建WebReport.Report中的ExportParameters事件

    報告生成器FastReport .NET實踐指南:如何創(chuàng)建WebReport.Report中的ExportParameters事件


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    在FastReport 2020.1中,我們添加了更改導(dǎo)出參數(shù)的功能。因此,您必須在WebReport.Report中預(yù)訂ExportParameters事件。

    到目前為止,F(xiàn)astReport.Net庫尚未提供對導(dǎo)出參數(shù)的訪問。或更確切地說,它確實可以,但是僅對某些參數(shù)有效,并且借助于Web報表的各個屬性。所有這些屬性都是堆積在一起的,并且使用intelisense進行操作非常不方便,并且不能滿足用戶的所有需求。因此,決定使用特殊的ExportParameters事件為用戶提供對導(dǎo)出對象的所有屬性的訪問權(quán)限。在事件處理程序中,您可以獲取導(dǎo)出對象并設(shè)置所需的所有屬性。因此,由于先前不可用的屬性,現(xiàn)在可以更精確地配置導(dǎo)出。這是使用新事件的方法:

    WebReport.Report.ExportParameters += (sender, e) =>
     {
     PDFExport export = e.Export as PDFExport;
     if (export != null)
     {
     export.Title = "test";
     export.DefaultPage = 2;
     }
     };
     在此示例中,我們僅更改了頁眉和默認頁面。請注意,我們期望在處理時導(dǎo)出PDF,這意味著此代碼將不適用于其他類型的導(dǎo)出。在一個處理程序中,您可以一次為幾種導(dǎo)出類型指定設(shè)置。

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    現(xiàn)在,讓我們以PDF導(dǎo)出為例,說明可用的導(dǎo)出屬性如何擴展。以前,WebReport為我們提供了一組導(dǎo)出屬性,它們實際上是對PDFExport導(dǎo)出對象的屬性的包裝:

     public string PdfTitle { get; set; }
     public string PdfAuthor { get; set; }
     public string PdfSubject { get; set; }
     public string PdfKeywords { get; set; }
     public string PdfCreator { get; set; }
     public string PdfProducer { get; set; }
     public string PdfUserPassword { get; set; }
     public bool PdfPrintScaling { get; set; }
     public string PdfOwnerPassword { get; set; }
     public bool PdfAllowModify { get; set; }
     public bool PdfAllowCopy { get; set; }
     public bool PdfAllowAnnotate { get; set; }
     public bool PdfA { get; set; }
     public bool PdfShowPrintDialog { get; set; }
     public bool PdfImagesOriginalResolution { get; set; }
     public bool PdfJpegCompression { get; set; }
     public bool PdfAllowPrint { get; set; }
     public bool PdfCenterWindow { get; set; }
     public bool PdfHideWindowUI { get; set; }
     public bool PdfFitWindow { get; set; }
     public bool PdfEmbeddingFonts { get; set; }
     public bool PdfBackground { get; set; }
     public bool PdfInteractiveForms { get; set; }
     public bool PdfPrintOptimized { get; set; }
     public bool PdfOutline { get; set; }
     public bool PdfDisplayDocTitle { get; set; }
     public bool PdfHideToolbar { get; set; }
     public bool PdfHideMenubar { get; set; }
     public bool PdfTextInCurves { get; set; }
     我必須說,此屬性列表包括主要和最受歡迎的屬性,但不是全部。許多用戶想要更多。現(xiàn)在,有了新的事件ExportParameters,它們就可以使用全套屬性:

    public bool HideWindowUI { get; set; } - hide user interface;
     public bool ShowPrintDialog { get; set; } – show printing dialog;
     public bool HideToolbar { get; set; } – hide toolbar in PDF viewer;
     public bool HideMenubar { get; set; } – hide menubar in PDF viewer;
     public GradientInterpolationPointsEnum GradientInterpolationPoints { get; set; } – gradient interpolation poinrs;
     public bool FitWindow { get; set; } – enable window fitting;
     public bool CenterWindow { get; set; } – center window;
     public bool PrintScaling { get; set; } – show scaling;
     public bool Outline { get; set; } – show contents;
     public MagnificationFactor DefaultZoom { get; set; } – default zoom;
     public int RichTextQuality { get; set; } – RichText quality;
     public bool Compressed { get; set; } – compress file;
     public bool TransparentImages { get; set; } – transparent image;
     public bool DisplayDocTitle { get; set; } – display document title;
     public int DefaultPage { get; set; } – default page number;
     public byte[] ColorProfile { get; set; } – color profile;
     public ExportType ExportMode { get; set; } – export type;
     public bool InteractiveForms { get; set; } – enable interactive forms;
     public bool IsDigitalSignEnable { get; set; } – enable digital signature;
     public bool SaveDigitalSignCertificatePassword { get; set; } – save digital signature certificate password;
     public X509Certificate2 DigitalSignCertificate { set; } – digital signature certificate;
     public string DigitalSignCertificatePath { get; set; } – digital signature certificate path;
     public string DigitalSignCertificatePassword { set; } – ; digital signature certificate password
     public string DigitalSignLocation { get; set; } – digital signature location;
     public string DigitalSignReason { get; set; } – digital signature reason;
     public string DigitalSignContactInfo { get; set; } – digital signature contact info;
     public CurvesInterpolationEnum CurvesInterpolation { get; set; } – curves interpolation;
     public bool AllowAnnotate { get; set; } – allow annotation;
     public bool AllowCopy { get; set; } – allow copying;
     public bool AllowModify { get; set; } – allow editing;
     public bool AllowPrint { get; set; } – allow print;
     public GradientQualityEnum GradientQuality { get; set; } – gradient quality;
     public PdfStandard PdfCompliance { get; set; } – PDF standard complience;
     public bool EmbeddingFonts { get; set; } – enable embedded fonts;
     public bool Background { get; set; } – enable background;
     public CurvesInterpolationEnum CurvesInterpolationText { get; set; } – interpolation text curves;
     public PdfColorSpace ColorSpace { get; set; } – color space;
     public bool ImagesOriginalResolution { get; set; } – use original image resolution;
     public bool PrintOptimized { get; set; } – print optimization;
     public bool JpegCompression { get; set; } – Jpeg image compression;
     public bool TextInCurves { get; set; } – make text in curves;
     public string Title { get; set; } – title;
     public string UserPassword { get; set; } – user password for encrypted documents;
     public int JpegQuality { get; set; } – Jpeg image quality;
     public string OwnerPassword { get; set; } – Owner’s password;
     public string Producer { get; set; } – Producer;
     public bool SvgAsPicture { get; set; } – Display Svg objects as pisctures;
     public string Keywords { get; set; } – Keywords;
     public string Subject { get; set; } – Subject of the document;
     public string Author { get; set; } – Author;
     public string Creator { get; set; } – Creator;

    這沒有考慮所有出口的共同屬性。

    讓我們總結(jié)一下新的ExportParameters事件給我們帶來的好處。通過將對象用于特定導(dǎo)出,我們只能訪問該導(dǎo)出的屬性。以前,需要從所有可能導(dǎo)出的屬性的通用列表中進行選擇,但這并不總是很方便,因為某些屬性的名稱并不明顯,無法識別導(dǎo)出。您將使用Intellisense看到可用屬性的完整列表,或者可以看到可用屬性的完整列表。

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