Question

我没有收到导出到excel代码中出现的错误。我有这个错误

无法将“System .__ ComObject”类型的COM对象强制转换为接口键入“Microsoft.Office.Interop.Excel.Range”。此操作失败因为QueryInterface调用COM组件的接口由于IID'{00020846-0000-0000-C000-000000000046}'失败了以下错误：不支持此类接口（来自HRESULT的异常： 0x80004002（E_NOINTERFACE））。

以下是我的gridview中的代码，我的gridview名称是dgvCommission。

void worker_DoWork(object sender, DoWorkEventArgs e)
   {
       try
        {
            timer.Elapsed += new System.Timers.ElapsedEventHandler(timer_elapsed);
            timer.Start();
            Invoke(new MyDelegate(ShowLabel), "Loading...");

            BACS.DateFrom = this.dtFrom.Value.ToShortDateString(); //this.dtFrom.Text;
            BACS.DateTo = this.dtTo.Value.ToShortDateString(); //this.dtTo.Text;
            BACS.BrokerAgent = BrokerXML;
            BACS.Payor = PayorXML;
            DS = BACS.GET_SP_BACS_ComputeCommission();
            ReadData(DS, this.dgvCommision);
            CheckGrid();
            Thread.Sleep(1);
            timer.Stop();
        }
       catch
       { }
    }

这是我在表单中导出excel代码。

private void ExportToExcel()
    {
        string[] arrays = new string[19];
        arrays[0] = "Type";
        arrays[1] = "Broker Agent";
        arrays[2] = "Payor";
        arrays[3] = "Billing #";
        arrays[4] = "OR No.";
        arrays[5] = "OR Date";
        arrays[6] = "Particulars";
        arrays[7] = "Mode";
        arrays[8] = "Amount Billed";
        arrays[9] = "Amount Paid";
        arrays[10] = "Non Comm Items";
        arrays[11] = "Net";
        arrays[12] = "Output VAT";
        arrays[13] = "Commissionable Amount";
        arrays[14] = "WTAX Rate";
        arrays[15] = "WTAX";
        arrays[16] = "Net Commission";
        arrays[17] = "InputVAT";
        arrays[18] = "For Fund Release";

        SystemUtil.ExportToExel(DS, arrays);
    }

ExportToExcel类代码是这样的：

public void ExportToExel(DataSet ds,string[] arrays)
    {
            Excel.Application oXL;
            Excel.Workbook oWB;
            Excel.Worksheet oSheet;
            //Excel.Range oRange;

            oXL = new Excel.Application();
            // Set some properties 
            oXL.Visible = true;
            oXL.DisplayAlerts = false;

            // Get a new workbook. 
            oWB = oXL.Workbooks.Add(Missing.Value);

            // Get the active sheet 
            oSheet = (Excel.Worksheet)oWB.ActiveSheet;
            oSheet.Name = "EXCEL";

            DataTable dt2 = new DataTable(); 
            if (ds.Tables[0] != null)
            {
                dt2 = ds.Tables[0];
            }


            int rowCount = 1;
            foreach (DataRow dr in dt2.Rows)
            {
                rowCount += 1;
                for (int i = 1; i < dt2.Columns.Count + 1; i++)
                {
                    if (rowCount == 2)
                    {
                        oSheet.Cells[1, i] = arrays[i - 1];// dt.Columns[i - 1].ColumnName;
                        // oSheet.Cells[1,i].Font.Background = System.Drawing.Color.Red;
                    }
                    oSheet.Cells[rowCount, i] = dr[i - 1].ToString();
                }
            }

            ////// Resize the columns 
            //oRange = oSheet.get_Range(1, 23);
            ////oRange.EntireColumn.AutoFit();
            //oRange.Range[1, 2].AutoFit();

            // Save the sheet and close 
            oSheet = null;
            // oRange = null;
            //oWB.SaveAs(@"c:\REPORTS.xls", Excel.XlFileFormat.xlWorkbookNormal,
            //    Missing.Value, Missing.Value, Missing.Value, Missing.Value,
            //    Excel.XlSaveAsAccessMode.xlExclusive,
            //    Missing.Value, Missing.Value, Missing.Value,
            //    Missing.Value, Missing.Value);
            //oWB.Close(Missing.Value, Missing.Value, Missing.Value);
            //oWB = null;
            //oXL.Quit();

            // Clean up 
            // NOTE: When in release mode, this does the trick 
            GC.WaitForPendingFinalizers();
            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();
    }

此代码中会弹出异常错误。 oSheet.Cells[1, i] = arrays[i - 1];

你们知道这怎么可能发生？我不明白我的代码中有什么问题..请帮我解决这个问题。在此先感谢您的帮助。

Answer 1

尝试更改

oSheet =（Excel.Worksheet）oWB.ActiveSheet;

要 oSheet =（Excel.Worksheet）oXL.ActiveSheet;

进一步说明：MSDN提供了有关工作簿界面的以下注释....

“此接口由Visual Studio Tools for Office运行时实现。它不打算在您的代码中实现。有关详细信息，请参阅用于Office运行时概述的Visual Studio工具。”

这就是为什么在初始化新工作簿后必须引用应用程序界面的原因。

如果它解决了你的问题，请将其标记为已回答。

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