文檔無法在iText 7.0.2上添加表格對象

Question

我最近將我的iText7項目從7.0.1升級到7.0.2。之後，我試圖重建我的項目並進行單元測試。單元測試給了我一個錯誤，然後我試着調試單元測試。其結果是有，我從來沒有發現一個奇怪的例外...該代碼是一樣的，但它在V7.0.1流暢運行，但低於異常風行V7.0.2：

異常消息：

「可爲空的對象必須有值。」

異常堆棧跟蹤：

在System.ThrowHelper.ThrowInvalidOperationException（ExceptionResource 資源）在iText.Layout.Renderer.TableRenderer.Layout（LayoutContext layoutContext）在 iText.Layout.Renderer.RootRenderer.AddChild（IRenderer渲染器）在 iText.Layout.RootElement`1.Add（IBlockElement元件）在 iText.Layout.Document.Add（IBlockElement元件）在 KMK_Core.Core._Core_PrintKMK（）在C：\用戶\傑弗裏 Angtoni \源\ Repos \ kmk-core-ng \ KMK NG \ KMK Core \ Core.cs：line 332

下面是我的表生成代碼：

Table tblStudentIdentity = new Table(new float[] { 3.5f, .2f, 5f }); 
tblStudentIdentity.SetWidthPercent(80f); 

_Core_SetIdentityTableValue(ref tblStudentIdentity, "NAMA", "Name", "LEONARDO DICAPRIO"); 
_Core_SetIdentityTableValue(ref tblStudentIdentity, "NIM", "Student Number", "1301566255"); 
_Core_SetIdentityTableValue(ref tblStudentIdentity, "FAKULTAS/SEKOLAH", "Faculty/School", "", "School of Computer Science"); 

tblStudentIdentity.SetRelativePosition(115f, 20f, 0f, 0f); 
_doc.Add(tblStudentIdentity); 

下面是我的_Core_SetIdentityTableValue功能：

private int _Core_SetIdentityTableValue(ref Table tableObject, string LeftLabelID = "", string LeftLabelEN = "", string RightValueID = "", string RightValueEN = "") 
{ 
    int Result = 0; 
    Text txtOpenInfo = new Text("(").AddStyle(StyleHelper.lblIDStyle); 
    Text txtCloseInfo = new Text(")").AddStyle(StyleHelper.lblIDStyle); 
    Text txtColonInfo = new Text(":").AddStyle(StyleHelper.lblIDStyle); 

    Paragraph lblLeftPrgrh = new Paragraph(); 
    if (LeftLabelEN != "" && LeftLabelID != "") 
    { 
     Text lblID = new Text(LeftLabelID + " ").AddStyle(StyleHelper.lblIDStyle); 
     Text lblEN = new Text(LeftLabelEN).AddStyle(StyleHelper.lblENStyle); 
     lblLeftPrgrh.Add(lblID).Add(txtOpenInfo).Add(lblEN).Add(txtCloseInfo); 
    }else if (LeftLabelEN == "" && LeftLabelID != "") 
    { 
     Text lblID = new Text(LeftLabelID).AddStyle(StyleHelper.lblIDStyle); 
     lblLeftPrgrh.Add(lblID); 
    }else if (LeftLabelEN != "" && LeftLabelID == "") 
    { 
     Text lblEN = new Text(LeftLabelEN).AddStyle(StyleHelper.lblENStyle); 
     lblLeftPrgrh.Add(lblEN); 
    }else 
    { 
     Text lblErrorLeft = new Text("Error-NoValue"); 
     lblLeftPrgrh.Add(lblErrorLeft); 
     Result = 1; 
    } 

    Paragraph lblRightPrgrh = new Paragraph(); 
    if (RightValueEN != "" && RightValueID != "") 
    { 
     Text lblValID = new Text(RightValueID + " ").AddStyle(StyleHelper.lblIDStyle); 
     Text lblValEN = new Text(RightValueEN).AddStyle(StyleHelper.lblENStyle); 
     lblRightPrgrh.Add(lblValID).Add(txtOpenInfo).Add(lblValEN).Add(txtCloseInfo); 
    }else if (RightValueEN == "" && RightValueID != "") 
    { 
     Text lblValID = new Text(RightValueID).AddStyle(StyleHelper.lblIDStyle); 
     lblRightPrgrh.Add(lblValID); 
    }else if (RightValueEN != "" && RightValueID == "") 
    { 
     Text lblValEN = new Text(RightValueEN).AddStyle(StyleHelper.lblENStyle); 
     lblRightPrgrh.Add(lblValEN); 
    }else 
    { 
     Text lblValError = new Text("Error-NoValue"); 
     lblRightPrgrh.Add(lblValError); 
     Result = 1; 
    } 

    Paragraph lblCenterPrgrh = new Paragraph(txtColonInfo); 

    Cell cellLeft = new Cell(); 
    cellLeft.Add(lblLeftPrgrh) 
     .SetBorder(Border.NO_BORDER) 
     .SetVerticalAlignment(VerticalAlignment.TOP); 
    Cell cellMiddle = new Cell(); 
    cellMiddle.Add(lblCenterPrgrh) 
     .SetBorder(Border.NO_BORDER) 
     .SetVerticalAlignment(VerticalAlignment.TOP); 
    Cell cellRight = new Cell(); 
    cellRight.Add(lblRightPrgrh) 
     .SetBorder(Border.NO_BORDER) 
     .SetVerticalAlignment(VerticalAlignment.TOP); 
    tableObject.AddCell(cellLeft).AddCell(cellMiddle).AddCell(cellRight); 
    return Result; 
} 

這是從V7.0.2 V7.0.1以來已成功運行上面的代碼中的錯誤...？我還檢查了Table對象不是null，但異常表明該對象可能爲空...此修復的任何線索或解決方案...？

Answer 1

不幸的是，這確實是7.0.2中的一個錯誤，它與表的相對定位的錯誤處理有關，並且存在於Java和C＃中。它已被修復，但修復程序僅在7.0.3版本中可用。但是，您始終可以從Artifactory下載快照版本（在C＃中也稱爲7.0.2.1）。