Winform合并多个Excel文件到一个文件中（源文件.xls,实际是.xml）

1.下面两个文件.xls是给的文件，实际上是.xml文件

2.具体的代码

  private void btOK_Click(object sender, EventArgs e)
         {
             //0.获取路径文件夹
             this.btOK.Enabled = false;
             this.textBox1.Text = System.Windows.Forms.Application.StartupPath + "\\de";
             strAllFiles = Directory.GetFiles(System.Windows.Forms.Application.StartupPath + "\\de","*.xls");

             showMessage("正在执行修改错误文件格式......");
             System.Windows.Forms.Application.DoEvents();
             Thread.Sleep();

             //1.修改文件扩展名
             EditFileName();
             //2.保存新的扩展名
             CheckExeclEditing();
             //3.读取数据并合并数据
             #region
             //strAllFiles = Directory.GetFiles(this.textBox1.Text);
             strName = new string[strAllFiles.Length * ];
             DataSet[] ds = new DataSet[strAllFiles.Length * ];
             int j = ;
             for (int i = ; i < strAllFiles.Length; i++)
             {
                 string sql = null;
                 System.Data.DataTable TableName = ExcelAPI.LoadDataFromExcel(strAllFiles[i]);
                 if (TableName.Rows.Count > )
                 {
                     foreach (DataRow item in TableName.Rows)
                     {
                         if (!item["TABLE_NAME"].ToString().Contains("Print_Titles"))
                         {
                             sql = string.Format("SELECT * FROM [{0}] WHERE F3 is not null and F3 not like '单位'", item["TABLE_NAME"].ToString());
                             ds[j] = (ExcelAPI.LoadDataFromExcel(strAllFiles[i], sql));
                             strName[j] = System.IO.Path.GetFileNameWithoutExtension(strAllFiles[i]);
                             j++;
                         }
                     }
                 }
                 showMessage("正在执行" + System.IO.Path.GetFileNameWithoutExtension(strAllFiles[i]) + "文件......");
                 System.Windows.Forms.Application.DoEvents();
                 Thread.Sleep();
             }

             string[] st = new string[];
             for (int i = ; i < st.Length; i++)
             {
                 st[i] = i.ToString();
             }
             string path = textBox1.Text.Substring(textBox1.Text.LastIndexOf("\\") + ) + "_" + DateTime.Now.ToString("yyyy年MM月dd日hh点mm分ss秒") + ".xls";
             showMessage("正在执行合并文件......");
             System.Windows.Forms.Application.DoEvents();
             Thread.Sleep();
             bool result = ExcelAPI.WebExportToExcel_1(ds, textBox1.Text, path, strName, , true);
             if (result == true)
             {
                 MessageBox.Show("成功");
                 this.btOK.Enabled = true;
                 System.Windows.Forms.Application.ExitThread();
             }
             else
             {
                 this.btOK.Enabled = true;
                 MessageBox.Show("失败");
             }
             #endregion
         }

  private void EditFileName()
         {
             try
             {

                 strAllFiles = Directory.GetFiles(this.textBox1.Text,"*.xls");
                 for (int i = ; i < strAllFiles.Length; i++)
                 {
                     byte[] bT = File.ReadAllBytes(strAllFiles[i]);
                     FileStream fs = File.Create(strAllFiles[i].Replace(".xls", ".xml"));
                     fs.Write(bT, , bT.Length);
                     fs.Close();
                     File.Delete(strAllFiles[i]);
                 }
             }
             catch (Exception ex)
             {
                 Log.WriteFileError(ex);
             }
         }

         private void CheckExeclEditing()
         {
             try
             {
                 for (int i = ; i < strAllFiles.Length; i++)
                 {
                     string strFileName = strAllFiles[i].Replace(".xls", ".xml");
                     string str = strFileName.Replace(".xml", ".xls");
                     Microsoft.Office.Interop.Excel._Application execl = new Microsoft.Office.Interop.Excel.ApplicationClass();
                     Microsoft.Office.Interop.Excel.Workbook bookDes1t = (Microsoft.Office.Interop.Excel.Workbook)execl.Workbooks.Open(strFileName);
                     bookDes1t.SaveAs(str, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal);
                     bookDes1t.Close();
                     execl.Application.Quit();
                 }
             }
             catch (Exception ex)
             {
                 Log.WriteFileError(ex);
             }

         }

  public class ExcelAPI
  {
 /// <summary>
         /// 获取表名称
         /// </summary>
         /// <param name="filePath">路径</param>
         /// <returns></returns>
         public static System.Data.DataTable LoadDataFromExcel(string filePath)
         {
             try
             {
                 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'";//只能打开2003
                 OleDbConnection OleConn = new OleDbConnection(strConn);
                 OleConn.Open();
                 //string sql=string.Format("SELECT * FROM  [{0}$]", strSheetName);//可更改Sheet名称，比如sheet2，等等
                 System.Data.DataTable DataNames = OleConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
                 OleConn.Close();
                 return DataNames;

             }
             catch (Exception err)
             {
                 Log.WriteFileError(err);
                 //MessageBox.Show("数据绑定Excel失败!失败原因：" + err.Message, "提示信息",
                 //    MessageBoxButtons.OK, MessageBoxIcon.Information);
                 return null;
             }
         }
   //加载Excel
         public static DataSet LoadDataFromExcel(string filePath, string sqlCmd)
         {
             try
             {
                 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'";//只能打开2003
                 //strConn = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0 Xml;HDR=YES'", filePath);//可打开2007

                 using (OleDbConnection OleConn = new OleDbConnection(strConn))
                 {
                     //string sql =string.Format("SELECT * FROM  [{0}$]", strSheetName);//可更改Sheet名称，比如sheet2，等等   

                     using (OleDbDataAdapter OleDaExcel = new OleDbDataAdapter(sqlCmd, OleConn))
                     {
                         DataSet OleDsExcle = new DataSet();
                         OleDaExcel.Fill(OleDsExcle, sqlCmd);
                         //MessageBox.Show(OleDsExcle.Tables[strSheetName].Rows[3][1].ToString());
                         return OleDsExcle;
                     }
                 }
             }
             catch (Exception err)
             {
                 Log.WriteFileError(err);
                 //MessageBox.Show("数据绑定Excel失败!失败原因：" + err.Message, "提示信息",
                 //    MessageBoxButtons.OK, MessageBoxIcon.Information);
                 return null;
             }
         }

  /// <param name="dv">用于导出的DataSET[数组]</param>
         /// <param name="tmpExpDir">导出的文件夹路径，例如d:/</param>
         /// <param name="refFileName">文件名，例如test.xls</param>
         /// <param name="sheetName">Sheet的名称，如果导出多个Sheet[数租]</param>
         /// <param name="sheetSize">每个Sheet包含的数据行数，此数值不包括标题行。所以，对于65536行数据，请将此值设置为65535</param>
         /// <param name="setBorderLine">导出完成后，是否给数据加上边框线</param>
         public static bool WebExportToExcel_1(DataSet[] dv, string tmpExpDir, string refFileName, string[] strName, int sheetSize, bool setBorderLine)
         {
             try
             {

                 string[] str = { "定额编号", "编号", "人材机名称", "人材机单位", "数量", "人材机单价" };
                 int RowsToDivideSheet = sheetSize;//计算Sheet行数
                 int sheetCount = dv.Length;
                 GC.Collect();// 回收其他的垃圾
                 Microsoft.Office.Interop.Excel.Application excel; _Workbook xBk; _Worksheet xSt = null;
                 excel = new ApplicationClass(); xBk = excel.Workbooks.Add(true);
                 int dvRowEnd; int rowIndex = ; int colIndex = ;
                 xSt = (_Worksheet)xBk.Worksheets.Add(Type.Missing, Type.Missing, , Type.Missing);
                 xSt.Name = "数据信息合并";
                 foreach (string item in str)
                 {
                     //设置标题格式
                     xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;
                     //设置标题居中对齐
                     xSt.get_Range(excel.Cells[rowIndex, colIndex], excel.Cells[rowIndex, colIndex]).Font.Bold = true;
                     //填值，并进行下一列
                     excel.Cells[rowIndex, colIndex++] = item;
                 }
                 //对全部Sheet进行操作
                 for (int sheetIndex = ; sheetIndex < sheetCount; sheetIndex++)
                 {
                     Log.WriteFile(strName[sheetIndex]);
                     //计算结束行
                     dvRowEnd = RowsToDivideSheet;
                     if (dvRowEnd > dv[sheetIndex].Tables[].Rows.Count)
                     { dvRowEnd = dv[sheetIndex].Tables[].Rows.Count + ; }

                     int i = ;
                     //以下代码就是经过修正后的。上面注释的代码有问题。
                     foreach (DataRow dr in dv[sheetIndex].Tables[].Rows)
                     {
                         //新起一行，当前单元格移至行首
                         rowIndex++;
                         colIndex = ;
                         excel.Cells[rowIndex, colIndex] = strName[sheetIndex];
                         excel.Cells[rowIndex, ++colIndex] = dr[].ToString();
                         excel.Cells[rowIndex, ++colIndex] = dr[].ToString();
                         excel.Cells[rowIndex, ++colIndex] = dr[].ToString();
                         excel.Cells[rowIndex, ++colIndex] = dr[].ToString();
                         excel.Cells[rowIndex, ++colIndex] = dr[].ToString();

                     }
                     Range allDataWithTitleRange = xSt.get_Range(excel.Cells[, ], excel.Cells[rowIndex, colIndex]);
                     allDataWithTitleRange.Select();
                     allDataWithTitleRange.Columns.AutoFit();
                     if (setBorderLine)
                     {
                         allDataWithTitleRange.Borders.LineStyle = ;
                     }

                 }//Sheet循环结束
                 string absFileName = System.IO.Path.Combine(tmpExpDir, refFileName);
                 xBk.SaveCopyAs(absFileName); xBk.Close(false, null, null);
                 excel.Quit();
                 System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
                 System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
                 System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
                 xBk = null; excel = null; xSt = null; GC.Collect();
                 return true;
             }
             catch (Exception ex)
             {
                 Log.WriteFileError(ex);
                 //MessageBox.Show("导入Excel出错！错误原因：" + ex.Message, "提示信息",
                 //  MessageBoxButtons.OK, MessageBoxIcon.Information);
                 return false;

             }
         }
 }

3.日志文件

 public class Log
     {
         public static void WriteFileError(Exception ex)
         {
             String sFileName;
             String sFilePath = Path.Combine(Application.StartupPath, @"Log\错误日志文件");
             if (Directory.Exists(sFilePath) == false)
                 Directory.CreateDirectory(sFilePath);
             else
             {
                 DirectoryInfo dInfo = new DirectoryInfo(sFilePath);
                 if (dInfo.GetFiles().Length > )
                     foreach (FileInfo fInfo in dInfo.GetFiles())
                         fInfo.Delete();
             }
             //用当前日期（年月日）作为文件名
             sFileName = DateTime.Now.ToShortDateString().Replace("/", "-") + ".log";  //文件名不能包括:
             sFilePath = Path.Combine(sFilePath, sFileName);

             StreamWriter streamWriter;

             if (File.Exists(sFilePath))
                 streamWriter = File.AppendText(sFilePath);
             else
                 streamWriter = File.CreateText(sFilePath);

             streamWriter.WriteLine();
             streamWriter.WriteLine(DateTime.Now.ToString());
             streamWriter.WriteLine(ex.ToString());
             streamWriter.WriteLine(ex.Message);
             streamWriter.WriteLine(ex.InnerException);
             if (ex is DetailException)
             {
                 streamWriter.Write(((DetailException)ex).additionalMsg);
                 streamWriter.WriteLine();
             }
             streamWriter.Close();
         }
         public static void WriteFile(string exFile)
         {
             String sFileName;
             String sFilePath = Path.Combine(Application.StartupPath, @"Log\操作文件日志");
             if (Directory.Exists(sFilePath) == false)
                 Directory.CreateDirectory(sFilePath);
             else
             {
                 DirectoryInfo dInfo = new DirectoryInfo(sFilePath);
                 if (dInfo.GetFiles().Length > )
                     foreach (FileInfo fInfo in dInfo.GetFiles())
                         fInfo.Delete();
             }
             //用当前日期（年月日）作为文件名
             sFileName = DateTime.Now.ToShortDateString().Replace("/", "-") + ".log";  //文件名不能包括:
             sFilePath = Path.Combine(sFilePath, sFileName);

             StreamWriter streamWriter;

             if (File.Exists(sFilePath))
                 streamWriter = File.AppendText(sFilePath);
             else
                 streamWriter = File.CreateText(sFilePath);

             streamWriter.WriteLine();
             streamWriter.WriteLine(DateTime.Now.ToString());
             streamWriter.WriteLine(exFile);
             streamWriter.Close();
         }
     }

  public class DetailException : Exception
     {
         public Exception exception;
         public string additionalMsg;

         public DetailException(Exception ex, string additionalMsg)
         {
             exception = ex;
             this.additionalMsg = additionalMsg;
         }
     }

     public class ExceptionHandler
     {
         public static StringBuilder strLog = new StringBuilder();

         public static void handlingExcetion(Exception ex)
         {
             if (ex == null) return;

             strLog.Append(DateTime.Now.ToLongDateString() + "  " + DateTime.Now.ToLongTimeString() + "||" + ex.Message);
             strLog.Append("------------------" + ex.StackTrace + "\r\n\r\n");

             Exception finalEx = ex;

             while (ex.InnerException != null && !ex.InnerException.Equals(finalEx))
             {
                 finalEx = ex.InnerException;
             }
             try
             {
                 Log.WriteFileError(finalEx);
             }
             catch (Exception e)
             {
                 System.Diagnostics.Trace.Write(e.Message);
             }
         }
     }