基於xml的數據庫移植代碼

#region 數據移植
  private void Integrate(string filename)
  {   
   DataSet ds=new DataSet();
   DataSet ds1=new DataSet();
   
   ds.ReadXml(@"c:/data/Integrate/"+filename+"col.xml");
   DataTable table=ds.Tables[0];

   ds1.ReadXml(@"c:/data/Integrate/"+filename+".xml");
   DataTable table1=ds1.Tables[0];
   
     
   try
   {
    if(table1.Rows.Count>0)// 檢查是否有數據存在(rows)創建數據庫表
    {   string DB=this.comboBox2.SelectedItem.ToString();
     string conn=null;
     switch(this.comboBox4.SelectedIndex)
     {
      case 0:
       conn="Provider=SQLOLEDB; Data Source=localhost; Initial Catalog="+DB+";User ID=sa;Password=sa";
       break;
      case 1:
       conn="Provider=OraOLEDB.Oracle;Data Source=oradb;User Id=sczb;Password=sczb" ;
       break;
      case 2:
       conn="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C://data//database.mdb";
       break;
      case 3:
       conn="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C://data//database.xls;Extended Properties=Excel 8.0";
       break;
      default:
       MessageBox.Show("數據庫類型被默認爲sql server 2000！");
       conn="Provider=SQLOLEDB; Data Source=localhost; Initial Catalog="+DB+";User ID=sa;Password=sa";
       break;
       
     }
     OleDbConnection oledbConn =new OleDbConnection(conn );
     try
     {oledbConn.Open();}
     catch(Exception exp)
     {
      string error=exp.Message.ToString();
      MessageBox.Show(error);
     }
     // 創建數據庫連接，打開數據庫，得到數據庫表的架構信息
     DataTable schemaTable = oledbConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables,new object[] {null, null,filename, "TABLE"});
    
     
     if(schemaTable.Rows.Count < 1)// 檢查表是否存在，如果存在在DataTable中將有一條記錄
     {
      try
      {
       string sqlCmd="create table "+filename+ "(";
       for(int i=0;i<table.Rows.Count;i++)
       {
        sqlCmd=sqlCmd+table.Rows[i][0].ToString()+" "+vType(this.comboBox4.SelectedIndex,table.Rows[i][1].ToString())+",";
       }
       sqlCmd=sqlCmd.Substring(0,sqlCmd.Length-1)+ ")";
       OleDbCommand oledbCmd=new OleDbCommand(sqlCmd,oledbConn);
       oledbCmd.ExecuteNonQuery();
      }
      catch(Exception exp)
      {
       string error=exp.Message.ToString();
       MessageBox.Show(exp.Message);
      }
      

     }
      if(this.comboBox4.SelectedIndex!=3)//對於特殊的數據庫類型excel由於不支持delete語句，因此要特別處理一下。即爲了避免重複插入數據，要手動清空後再插入！
      {
        OleDbCommand DelCmd=new OleDbCommand("delete from "+filename,oledbConn);
           DelCmd.ExecuteNonQuery();
      }

                        
      foreach(DataRow dr in table1.Rows)//插入記錄
      {
       string InsertCmd = "insert into "+filename+"(";
       // 遍歷Datatable的列
       for(int i = 0;i <table1.Columns.Count;i++)
       {
        // 添加column name
        InsertCmd = InsertCmd + table1.Columns[i].ColumnName.ToString() + ",";
       }
       
       InsertCmd  = InsertCmd.Substring(0,InsertCmd.Length-1) + ") values (";
       // 遍歷 DataTable columns
       for(int x = 0;x < table1.Columns.Count;x++)
       {
        // 添加column value到row
        InsertCmd =InsertCmd+ "'" + dr[x].ToString().Replace("'","''").Replace("/0","") + "',";
       }
       InsertCmd= InsertCmd.Substring(0,InsertCmd.Length - 1) + ")";
       OleDbCommand Cmd=new OleDbCommand(InsertCmd,oledbConn);
       Cmd.ExecuteNonQuery();
      }
      MessageBox.Show("入庫成功！");
      if(this.comboBox4.SelectedIndex==3&&schemaTable.Rows.Count==1)
      {
       MessageBox.Show("Excel文件已經被插入記錄，請手工刪除重複記錄！");//對於特殊的數據庫類型excel由於不支持delete語句，因此要特別處理一下。即爲了避免重複插入數據，要手動清空後再插入！
           
      }
               
     
    }
    else
    {
     MessageBox.Show("Xml文件中沒有數據！");
    }
   }
   catch
   {
    MessageBox.Show("入庫失敗！");
   }
   ds.Dispose();
  }
  #endregion