如果我尝试读取空的EXCEL单元格,则会收到System.com_object错误.我的代码是:
public static List<OrderPC> getFilters(string fileCheckout) { List<OrderPC> orderPCs = new List<OrderPC>(); XLDoc sldoc = new XLDoc(); string localPath = @"C:\Temp\PCs.xlsx"; Microsoft.Office.Interop.Excel.Application oXL=null; Microsoft.Office.Interop.Excel.Workbook mWorkBook=null; Microsoft.Office.Interop.Excel.Worksheet mWSheet1=null; Microsoft.Office.Interop.Excel.Range xlRange=null; try { oXL = new Microsoft.Office.Interop.Excel.Application(); mWorkBook = oXL.Workbooks.Open(localPath); mWSheet1 = mWorkBook.Sheets[1]; xlRange = mWSheet1.UsedRange; foreach (Microsoft.Office.Interop.Excel.Hyperlink hl in xlRange.Hyperlinks) { int y = hl.Range.Column; int z = hl.Range.Row; string vFilter = mWSheet1.Cells[z,y + 1].Value2.Trim(); if (vFilter.Compareto("Weekly") == 0) { String baseUri = "http://xxx.yyy.net?"; int followUpIndex = baseUri.Length; OrderPC orderPc = new OrderPC(); orderPc.ProductClass = hl.TextTodisplay.Trim(); orderPc.HyperLink = hl.Address.Trim().Substring(followUpIndex); orderPc.SpecType = mWSheet1.Cells[z,y - 1].Value2.Trim(); if (mWSheet1.Rows[z].Cells[y + 3] != null || mWSheet1.Rows[z].Cells[y + 3].Value2 != string.Empty) { orderPc.ManufactureDate = mWSheet1.Cells[z,y + 3].Value2.ToString(); //Here is the error** } //Console.WriteLine(orderPc.ProductClass+"----"+orderPc.HyperLink); orderPCs.Add(orderPc); } } } catch (Exception ex) { } finally { GC.Collect(); GC.WaitForPendingFinalizers(); Marshal.FinalReleaseComObject(xlRange); Marshal.FinalReleaseComObject(mWSheet1); mWorkBook.Close(Type.Missing,Type.Missing,Type.Missing); Marshal.FinalReleaseComObject(mWorkBook); oXL.Quit(); Marshal.FinalReleaseComObject(oXL); } return orderPCs; }
这个excel文件有10列,我想我正在读一个有效的单元格.错误是**“
{Microsoft.CSharp.RuntimeBinder.RuntimeBinderException:无法对空引用执行运行时绑定
在CallSite.Target(Closure,CallSite,Object)
在System.Dynamic.UpdateDelegates.UpdateAndExecute1 [T0,TRet](CallSite站点,T0 arg0)
“**我的COM没有任何线索.非常感谢帮助.
解决方法
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