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这是我的代码。我正在尝试使用一些具有颜色和自动调整的单元格将 gridview 导出到 excel 中。这里的问题是一切正常，除了在后台运行的 EXCEL.EXE。但是，如果我排除了 Autofit 和着色单元格的代码，则 Excel 任务将终止。

下面是我的代码

    protected void xlsWorkBook()
    {
        try
        {
            Excel.Application oXL;
            Excel.Workbook oWB;
            Excel.Workbooks oWBs;
            Excel.Worksheet oSheet;
            Excel.Range oRange;
            // Start Excel and get Application object.
            oXL = new Excel.Application();
            // Set some properties
            oXL.Visible = false;
            oXL.DisplayAlerts = false;
            // Get a new workbook.
            oWBs = oXL.Workbooks;
            oWB = oWBs.Add(1);
            oSheet = oWB.ActiveSheet;

            DataGridView dataGridExport = new DataGridView();
            dataGridExport.DataSource = GetData();
            bool isColorCells = false;

            oRange = oSheet.Cells;
            for (int k = 1; k <= dataGridExport.Columns.Count; k++)
            {
                //oRange.set_Item(1, k, dataGridExport.Columns[k - 1].Name); 
                oSheet.Cells[1, k] = dataGridExport.Columns[k - 1].Name;
                ((dynamic)oSheet.Cells[1, k]).Interior.Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.SteelBlue);
            }
            for (int i = 1; i <= dataGridExport.Rows.Count; i++)
            {
                for (int k = 1; k <= dataGridExport.Rows[i - 1].Cells.Count; k++)
                {
                    if (Convert.ToString(dataGridExport.Rows[i - 1].Cells[k - 1].Value) != string.Empty)
                    {
                        //oRange.set_Item(i + 1, k, dataGridExport.Rows[i - 1].Cells[k - 1].Value);
                        oSheet.Cells[i + 1, k] = dataGridExport.Rows[i - 1].Cells[k - 1].Value;

                    }
                    if ((isColorCells) && (dataGridExport.Rows[i - 1].Cells[k - 1].Style.BackColor.ToArgb() != 0))
                    {
                        //oRange.Interior.Color = Color.Red;
                        ((dynamic)oSheet.Cells[i + 1, k]).Interior.Color = ColorTranslator.ToOle(Color.FromArgb(dataGridExport.Rows[i - 1].Cells[k - 1].Style.BackColor.ToArgb()));
                    }
                }
            }
            dataGridExport = null;
            oSheet.Columns.AutoFit();
            //oRange.EntireColumn.AutoFit();
            // Save the sheet and close
            //oSheet = null;
            //oRange = null;
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "Excel File|*.xlsx";
            saveFileDialog1.Title = "Save an Excel File";
            saveFileDialog1.ShowDialog();
            if (saveFileDialog1.FileName != "")
            {

                oWB.SaveAs(saveFileDialog1.FileName, Excel.XlFileFormat.xlOpenXMLWorkbook, Missing.Value, Missing.Value, false, false, Excel.XlSaveAsAccessMode.xlNoChange,
                          Excel.XlSaveConflictResolution.xlUserResolution, true, Missing.Value, Missing.Value, Missing.Value);
            }

            GC.Collect();
            GC.WaitForPendingFinalizers();
            oWB.Close();
            oXL.Quit();

            System.Runtime.InteropServices.Marshal.ReleaseComObject(oRange);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(oSheet);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(oWB);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(oWBs);
            System.Runtime.InteropServices.Marshal.ReleaseComObject(oXL);



            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();
            GC.WaitForPendingFinalizers();

        }
        catch (Exception ex)
        {
            lblError.Text = ex.Message;
        }
        this.Cursor = Cursors.Default;
    }
4

1 回答 1

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将范围移动到不同的功能解决了我的问题。Excel.exe 不再在后台运行。但我不确定为什么。有人可以对此给出解释吗？ 

       protected void xlsWorkBook()
       {
            Excel.Application oXL;
            Excel.Workbook oWB;
            Excel.Worksheet oSheet;
            // Start Excel and get Application object.
            oXL = new Excel.Application();
            // Set some properties
            //oXL.Visible = false;
            oXL.DisplayAlerts = false;
            // Get a new workbook.
            oWB = oXL.Workbooks.Add(Missing.Value);

            oSheet = (Excel.Worksheet)oWB.ActiveSheet;
            UpdataDataToExcelSheets(oSheet,"sheet name",dataGrid1,true);

            // Save the sheet and close
            SaveFileDialog saveFileDialog1 = new SaveFileDialog();
            saveFileDialog1.Filter = "Excel File|*.xlsx";
            saveFileDialog1.Title = "Save an Excel File";
            saveFileDialog1.ShowDialog();
            if (saveFileDialog1.FileName != "")
            {

                oWB.SaveAs(saveFileDialog1.FileName, Excel.XlFileFormat.xlOpenXMLWorkbook, Missing.Value, Missing.Value, false, false, Excel.XlSaveAsAccessMode.xlNoChange,
                          Excel.XlSaveConflictResolution.xlUserResolution, true, Missing.Value, Missing.Value, Missing.Value);
            }

            oWB.Close();
            oXL.Quit();
            //// Clean up
            if (oSheet != null)
            {
                Marshal.FinalReleaseComObject(oSheet);
                oSheet = null;
            }
            if (oWB != null)
            {
                Marshal.FinalReleaseComObject(oWB);
                oWB = null;
            }
            if (oXL.Workbooks != null)
            {
                Marshal.FinalReleaseComObject(oXL.Workbooks);
            }
            if (oXL != null)
            {
                Marshal.FinalReleaseComObject(oXL);
                oXL = null;
            }
            //// NOTE: When in release mode, this does the trick
            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();
            GC.WaitForPendingFinalizers();
      }

       private void UpdataDataToExcelSheets(Excel.Worksheet oSheet,string sheetName, DataGridView  dataGridExport,bool isColorCells)
    {
        Excel.Range oRange;
        oSheet.Name = sheetName;
        for (int k = 1; k <= dataGridExport.Columns.Count; k++)
        {
            oSheet.Cells[1, k] = dataGridExport.Columns[k - 1].Name;
            ((dynamic)oSheet.Cells[1, k]).Interior.Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.SteelBlue);
        }

        for (int i = 1; i <= dataGridExport.Rows.Count; i++)
        {
            for (int k = 1; k <= dataGridExport.Rows[i - 1].Cells.Count; k++)
            {
                if (Convert.ToString(dataGridExport.Rows[i - 1].Cells[k - 1].Value) != string.Empty)
                {
                    oSheet.Cells[i + 1, k] = dataGridExport.Rows[i - 1].Cells[k - 1].Value;
                }
                if ((isColorCells)&&(dataGridExport.Rows[i - 1].Cells[k - 1].Style.BackColor.ToArgb() != 0))
                {
                    ((dynamic)oSheet.Cells[i + 1, k]).Interior.Color = ColorTranslator.ToOle(Color.FromArgb(dataGridExport.Rows[i - 1].Cells[k - 1].Style.BackColor.ToArgb()));
                }
            }
        }
        oRange = oSheet.Range[oSheet.Cells[1, 1],
        oSheet.Cells[dataGridExport.Rows.Count - 1, dataGridExport.Columns.Count + 1]];
        oRange.EntireColumn.AutoFit();

        if (oRange != null)
        {
            Marshal.FinalReleaseComObject(oRange);
            oRange = null;
        }
    }
于 2013-10-10T17:16:52.803 回答