oflexGrid.AutoSizeCols 报Object reference not set to an instance of an object.

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/// <summary>
      /// Use to Create the PrintPreview dialog.<br></br>
      /// </summary>
      /// <param name="oflexGrid">the FlexGrid Control.</param>
      /// <param name="szGridTitle">the FlexGrid Title.</param>
      static public void CreatePrintViewDialog(C1FlexGrid oflexGrid, string szGridTitle,bool isLandscape)
      {
         try
         {
            if (oflexGrid == null) throw new NullReferenceException();
            bool bReturn = PrinterSettings.InstalledPrinters.Count > 0 ? true : false;
            if (!bReturn)
            {
                  throw new Exception(MultiLanUtility.GetString("Install printer firstly"));
            }
            string _risDefaultPrinter = ClientFrameworkBuilder.Instance.ConfigDicManager.GetConfigDicValue("DefaultPrinter", "0000");
            if (_risDefaultPrinter.Length > 0) // use the GCRIS default printer settings
            {
                  PrintDocument pd = new PrintDocument();
                  pd.PrinterSettings.PrinterName = _risDefaultPrinter;
                  if (pd.PrinterSettings.IsValid)
                  {
                     oflexGrid.PrintParameters.PrintDocument.PrinterSettings.PrinterName = _risDefaultPrinter;
                  }
                  else
                  {
                     throw new Exception(MultiLanUtility.GetString("NotValidPrinter"));
                  }
            }
            oflexGrid.PrintParameters.PrintDocument.PrinterSettings.DefaultPageSettings.Landscape = isLandscape;
            oflexGrid.PrintParameters.PrintDocument.PrinterSettings.DefaultPageSettings.Margins = new Margins(50, 50, 50, 50);
            oflexGrid.PrintParameters.PrintDocument.DefaultPageSettings.Landscape = isLandscape;
            oflexGrid.PrintParameters.PrintDocument.DefaultPageSettings.Margins = new Margins(50, 50, 50, 50);
            oflexGrid.Font  = new Font(oflexGrid.Font.FontFamily, oflexGrid.Font.Size * 3/2);
            oflexGrid.AutoSizeCols();
            DataTable flexGridDataSource = null;
            if (oflexGrid.DataSource is DataTable)
            {
                  flexGridDataSource = (DataTable)oflexGrid.DataSource;
            }
            else if (oflexGrid.DataSource is DataView)
            {
                  flexGridDataSource = ((DataView)oflexGrid.DataSource).Table as DataTable;
            }
            if (flexGridDataSource != null)
            {
                  oflexGrid.PrintGrid("PrintFlexGridData", PrintGridFlags.FitToPageWidth, "\t" + szGridTitle + "  ", "\t\tPage {0} of {1}");
            }
            //C1FlexGridPrintable oC1FlexGridPrintable = new C1FlexGridPrintable(oflexGrid);
            //const string c_tag_t = "\\t";
            //oC1FlexGridPrintable.PrintInfo.PageHeader = c_tag_t + szGridTitle;
            //oC1FlexGridPrintable.PrintPreview();
         }
         catch (Exception ex)
         {
            //ClientFrameworkBuilder.Instance.CommonManager.ShowMsgBox(ex.Message);
            LogFacility.Instance.Logger.Error((int)ModuleEnum.Statistic_Client, ModuleInstanceName.Statistic, 0,
                  ex.Message, string.Empty, new StackFrame(true).GetFileName(),
                                 new StackFrame(true).GetFileLineNumber());
            ClientFrameworkBuilder.Instance.CommonManager.ShowMsgBox(ex.Message);
         }
      }

weisheng · weisheng

debug如图所示

Alice · Alice

weisheng 发表于 2016-11-16 10:24
debug如图所示

我这里无法重现您的问题。
请问您使用的是什么版本，因为旧版本曾经有过类似的bug。

weisheng · weisheng

就是用即将购买的最新版本。

weisheng · weisheng

我注释了oflexGrid.AutoSizeCols();
在下面这句程序挂起了。
oflexGrid.PrintGrid("PrintFlexGridData", PrintGridFlags.FitToPageWidth, "\t" + szGridTitle + " ", "\t\tPage {0} of {1}");
如图：

weisheng · weisheng

stack trace：
at #s5.#nhb.#khb(Int32 #lq)
at #s5.#nhb.#7gb(Int32 #j)
at #s5.#2fb.GetDataDisplay(Int32 #j, Int32 #l)
at #s5.#2fb.GetDataDisplay(Int32 #j, Int32 #l, Image& #Ak, CheckEnum& #bdb)
at C1.Win.C1FlexGrid.C1FlexGridBase.GetDataDisplay(Int32 row, Int32 col, Image& img, CheckEnum& chk)
at C1.Win.C1FlexGrid.C1FlexGridBase.AutoSizeCols(Graphics g, Int32 row1, Int32 col1, Int32 row2, Int32 col2, Int32 extra, AutoSizeFlags flags)
at C1.Win.C1FlexGrid.C1FlexGrid.AutoSizeCols(Graphics g, Int32 row1, Int32 col1, Int32 row2, Int32 col2, Int32 extra, AutoSizeFlags flags)
at C1.Win.C1FlexGrid.C1FlexGridBase.AutoSizeCols(Int32 topRow, Int32 leftCol, Int32 bottomRow, Int32 rightCol, Int32 extraSpace, AutoSizeFlags flags)
at C1.Win.C1FlexGrid.C1FlexGridBase.AutoSizeCols(Int32 extraSpace)
at C1.Win.C1FlexGrid.C1FlexGridBase.AutoSizeCols()

Alice · Alice

weisheng 发表于 2016-11-16 17:04
stack trace：
at #s5.#nhb.#khb(Int32 #lq)
at #s5.#nhb.#7gb(Int32 #j)

非常感谢您的反馈。
麻烦您提供可以重现问题的简单Demo，我这里需要测试重现问题。

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[已处理] oflexGrid.AutoSizeCols 报Object reference not set to an instance of an object.

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