C#实现复制数据库 C#将A数据库数据转到B数据库

本文章以一个表为例，要转多个表则可将DataSet关联多个表，下面给出完整代码，包括引用以及main函数与复制函数。
要说明的是，必须先用Sql语句复制表结构，才能顺利的使用以下代码复制数据。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Data.Common;

namespace CopyData
{
class Program
{
 static void Main(string[] args)
 {
  //要复制的表名
  string table = "V_Position";

//构造连接字符串
  SqlConnectionStringBuilder builder1 = new SqlConnectionStringBuilder();
  builder1.DataSource = ".\\CANFLY";  //实例名称为CANFLY
  builder1.InitialCatalog = "desdata"; //目标数据库
  builder1.IntegratedSecurity = true;  //使用Windows身份验证

SqlConnectionStringBuilder builder2 = new SqlConnectionStringBuilder();
  builder2.DataSource = ".\\CANFLY";
  builder2.InitialCatalog = "bddata";  //源数据库
  builder2.IntegratedSecurity = true;

//调用复制数据库函数
  InsertTable(builder1.ConnectionString, builder2.ConnectionString, table);
 }

//参数为两个数据库的连接字符串
 private static void InsertTable(string conString1, string conString2, string tabStr)
 {
  //连接数据库
  SqlConnection conn1 = new SqlConnection();
  conn1.ConnectionString = conString1;
  conn1.Open();

SqlConnection conn2 = new SqlConnection();
  conn2.ConnectionString = conString2;
  conn2.Open();

//填充DataSet1
  SqlDataAdapter adapter1 = new SqlDataAdapter("select * from " + tabStr, conn1);
  DataSet dataSet1 = new DataSet();

if (dataSet1 != null)
  {
   adapter1.Fill(dataSet1, tabStr);
  }

SqlDataAdapter adapter2 = new SqlDataAdapter("select * from " + tabStr, conn2);
  DataSet dataSet2 = new DataSet();

SqlCommand cmd2 = new SqlCommand("select count(*) from " + tabStr, conn2);
  Object res2 = cmd2.ExecuteScalar();

if (res2 != null)
  {
   int nCount = Convert.ToInt32(res2.ToString());
   if (nCount == 0)
   {
    conn1.Close();
    conn2.Close();
    return;
   }
  }

//填充DataSet2
  if (dataSet2 != null)
  {
   adapter2.Fill(dataSet2, tabStr);
  }

//复制数据
  for (int j = 0; j < dataSet2.Tables[0].Rows.Count; j++)
  {
   dataSet1.Tables[0].LoadDataRow(dataSet2.Tables[0].Rows[j].ItemArray, false);
  }

//将DataSet变换显示在与其关联的目标数据库
  SqlCommandBuilder cb = new SqlCommandBuilder(adapter1);
  adapter1.Update(dataSet1, tabStr);
  cb.RefreshSchema();

Console.WriteLine("表" + tabStr + "复制成功！");

conn1.Close();
  conn2.Close();

}
}
}

来源：http://blog.csdn.net/u011421608/article/details/39957873