C# WinFrom 用Execl做模版进行数据导入

      为了方便数据的导入，写一个通用的数据库导入方法进行导入数据会节省很大的时间，有的客户有很多的Execl，几个还好，如果多了有几百种表各种格式的表格都有，如果一个个来进行数据导入那是一个相当大的工作，写代码要每个都写一个，完了客户需求在进行变更，表格在进行改变，那代码修改量是相当大的，闹不好要死人撒，o(∩_∩)o 哈哈……懒人总会有懒的思维方式，嘿嘿……

      大体的思维方式如下：

      一、先创建一个Execl文件模版。在里面进行编辑一个模版，大家都知道Execl里面有公式的，从一个表里面引用其他表的数据是可以实现，这样我们把客户的表弄成跟我们模版相对应的表格，在把客户的表格用公式进行替换到其他的表格里面，在其他的表格里面我们写成利于我们进行编程的竖向表格化数据。模版的的sheet表面和里面的字段完全和数据库里面的字段一一对应。

     二、编写code用代码实现导入的步骤。

    （1）将创建的模版copy到临时文件夹里面

    （2）将客户要导入的数据的sheet表copy到临时文件夹里面的模板里

    （3）读取新模版里面的表格数据到Datatable

    （4）获取Datatable里面的表名和列名生成相应的sql语句

    （5）将Datatable里面数据进行循环去执行生成的sql将数据导入到创建好的数据库。

     思路就是上面那样，具体实现如下面的Code所示：

      引入一下命名空间

      using Excel = Microsoft.Office.Interop.Excel;
      using System.IO;
      using System.Data.OleDb;

     具体只要代码如下：

        private void btn_copyToM_Click(object sender, EventArgs e)
        {
            //将模版copy到临时文件路径下
            string tempPath = Application.StartupPath+"//temp//";
            fileName = tempPath +"result_temp.xls";
            string strDataFile = txt_filename.Text.Trim();
            if(!System.IO.Directory.Exists(tempPath))
            {
                Directory.CreateDirectory(tempPath);
            }
            //判断是否存在模版文件
            string modlPath=Application.StartupPath+"//mold//result.xls";
            if (File.Exists(modlPath))
            {
                if (File.Exists(fileName))
                {
                    File.Delete(fileName);
                }
                File.Copy(modlPath, fileName);
            }
            label1.Text = fileName;

           // Excel.Range objRange = null;

            Excel.Application objExcel = new Excel.Application();

            Excel.Workbook objWorkBookMold = null;

            Excel.Workbook objWorkBookData = null;

            objExcel.Workbooks.Open(fileName);

            objWorkBookMold=objExcel.Workbooks[1];

            objExcel.Workbooks.Open(strDataFile);

            objWorkBookData=objExcel.Workbooks[2];

            Excel.Worksheet objSheetData =objWorkBookData.Sheets[1];
            Excel.Worksheet objSheetMold = objWorkBookMold.Sheets[1];

            objSheetData.UsedRange.Copy();
            objSheetMold.Range["A1"].PasteSpecial();

            objWorkBookMold.Save();

            objWorkBookMold.Close(true, Type.Missing, Type.Missing);
            objWorkBookMold = null;
            objWorkBookData.Close(true, Type.Missing, Type.Missing);
            objWorkBookData = null;

            objExcel.Quit();
            objExcel = null;

            //Thread.Sleep(2000);

           // File.Delete(filename);
        }

        /// <summary>
        /// 查找指定表里面的指定数据
        /// </summary>
        /// <param name="path"></param>
        /// <param name="tableName"></param>
        /// <returns></returns>
        DataTable GetDataByExcel(string path,string tableName)
        {
            string sqlconn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties=Excel 8.0";
            string sql = "SELECT  * FROM [" + tableName + "$] ";
            DataTable dtda = new DataTable();
            using (OleDbCommand oldcom = new OleDbCommand(sql, new OleDbConnection(sqlconn)))
            {
                OleDbDataAdapter oleda = new OleDbDataAdapter(oldcom);
                dtda.TableName = tableName;
                oleda.Fill(dtda);
            }
            return dtda;
        }

       

        /// <summary>
        /// 通过数据表获取表的名字和字段名称
        /// </summary>
        /// <param name="data"></param>
        void getDataMsg(DataTable data)
        {
            fileTableName = data.TableName;
            fileTableColunmsName=new string[data.Columns.Count];
            for (int i = 0; i < fileTableColunmsName.Length; i++)
            {
                fileTableColunmsName[i] = data.Columns[i].ColumnName;
            }

        }

         /// <summary>
        /// 获取模版里面的所有的表名
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        string[] GetTabaleNames(string path)
        {
            Excel.Application objExcel = new Excel.Application();
            objExcel.Workbooks.Open(path);
            string[] strTableName = new string[objExcel.Workbooks[1].Worksheets.Count];
            for (int i = 0; i < strTableName.Length; i++)
            {
                Excel.Worksheet sheet= objExcel.Workbooks[1].Worksheets[i + 1];
                strTableName[i] =sheet.Name;
                sheet = null;
            }
            objExcel.Quit();
            objExcel = null;
            return strTableName;
        }

       private void btn_sql_Click(object sender, EventArgs e)
        {
            StringBuilder sbSql = new StringBuilder();
            sbSql.Append("insert into "+fileTableName+" ");
            sbSql.Append("( ");
            if (fileTableColunmsName != null)
            {
                if (fileTableColunmsName.Length > 0)
                {
                    for (int i = 0; i < fileTableColunmsName.Length; i++)
                    {
                        if (i == 0)
                        {
                            sbSql.Append(fileTableColunmsName[i]);
                        }
                        else
                        {
                            sbSql.Append("," + fileTableColunmsName[i]);
                        }
                    }
                    sbSql.Append(")");
                    sbSql.Append("values ");
                    sbSql.Append("(");
                    for (int i = 0; i < fileTableColunmsName.Length; i++)
                    {

                        if (i == 0)
                        {
                            sbSql.Append("@" + fileTableColunmsName[i]);
                        }
                        else
                        {
                            sbSql.Append(",@" + fileTableColunmsName[i]);
                        }
                    }
                }
            }
            sbSql.Append(")");
        }

o(∩_∩)o 哈哈以上面的方式进行导入数据，不管你有多少表格了，俺们苦逼的程序员将不在进行编写Code了，只要把模版改改就OK了！