使用 Microsoft.Office.Interop.Excel.dll 更新Excel的ColumnName

Microsoft.Office.Interop.Excel.dll 是MS提供的用于操作Excel的类库，这个类库非常强大，笔者最近遇到一个项目，需要修改Excel的列名，并且做成SSIS Package，在ssms中生存job自动执行。之前考虑使用NPOI，但是在使用NPOI时，Script task不能将NPOI自动导入到.net framework，需要执行一个gacutil的脚本，有点麻烦，既然Microsoft.Office.Interop.Excel.dll是微软的东西，肯定是已经集成到.net framework中，使用起来比较方便。

示例代码如下，代码中有关闭Excel和Kill Excel的进程是从网上复制的，向前辈致敬。

using Excel = Microsoft.Office.Interop.Excel;

        public void UpdateExcelColumnNameSimplify()
        {
            string strPath = @"C:\ExcelFile\FY15 R-Code Master - Copy.xlsx";
            Excel.Application excelApp=null;
            Excel.Workbook xlsWorkBook=null;

            try
            {
                System.Globalization.CultureInfo CurrentCI = System.Threading.Thread.CurrentThread.CurrentCulture;
                System.Threading.Thread.CurrentThread.CurrentCulture = new System.Globalization.CultureInfo("en-US");

                excelApp = new Excel.Application();
                excelApp.DisplayAlerts = false;
                excelApp.Visible = false;
                excelApp.ScreenUpdating = false;

                xlsWorkBook = excelApp.Workbooks.Open(strPath, System.Type.Missing, System.Type.Missing, System.Type.Missing,
                    System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing,
                    System.Type.Missing, System.Type.Missing, System.Type.Missing, System.Type.Missing);

                Excel.Worksheet xlsWorkSheet = (Excel.Worksheet)xlsWorkBook.Worksheets["sheet1"];

                int colsCount = 10;
                for (int i = 1; i < colsCount; i++)
                {
                    Excel.Range rc = (Excel.Range)xlsWorkSheet.Cells[1, i];
                    if (rc.Value != null)
                    {
                        rc.Value = rc.Value.ToString().Trim();
                    }
                }

                xlsWorkSheet = (Excel.Worksheet)xlsWorkBook.Worksheets["sheet2"];
                for (int i = 1; i < colsCount; i++)
                {
                    Excel.Range rc = (Excel.Range)xlsWorkSheet.Cells[1, i];
                    if (rc.Value != null)
                    {
                        rc.Value = rc.Value.ToString().Trim();
                    }
                }

                xlsWorkBook.Save();
            }
            catch
            {
                throw;
            }
            finally
            {
                CloseExcel(excelApp, xlsWorkBook);
            }
        }

        public class KillMyExcelProcess
        {
            [DllImport("User32.dll", CharSet = CharSet.Auto)]

            public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);

            public static void Kill(Microsoft.Office.Interop.Excel.Application excel)
            {
                try
                {
                    IntPtr t = new IntPtr(excel.Hwnd);   //得到这个句柄，具体作用是得到这块内存入口 

                    int k = 0;

                    GetWindowThreadProcessId(t, out k);   //得到本进程唯一标志k

                    System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);   //得到对进程k的引用

                    p.Kill();     //关闭进程k
                }
                catch (System.Exception ex)
                {

                    throw ex;
                }
            }
        }

        public void CloseExcel(Microsoft.Office.Interop.Excel.Application ExcelApplication, Microsoft.Office.Interop.Excel.Workbook ExcelWorkbook)
        {
            ExcelWorkbook.Close(false, Type.Missing, Type.Missing);

            ExcelWorkbook = null;

            ExcelApplication.Quit();

            GC.Collect();

            KillMyExcelProcess.Kill(ExcelApplication);
        }