C#实现复制数据库 C#将A数据库数据转到B数据库

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();    }  } }