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  • C#链接数据库的三部曲

     1  static void Main(string[] args)
     2         {
     3             int resLine = 0;
     4             //连接字符串
     5             string temp = @"ZZ-NBPC0003AMSSQLSERVER";
     6             string str = "Data Source=" + temp + ";Initial Catalog=dbtest;Integrated Security=True;";
     7             using (SqlConnection sqlConn = new SqlConnection(str))      //1.建立连接
     8             {
     9                 //string sql = "select * from test update test set cTitle='数学' where CID BETWEEN 17 AND 20";
    10                 string sql = "select * from test update test set cTitle='英语' where CID<5";
    11                 string sql1 = "select COUNT(*) from test";
    12                 string sql2 = "select * from test";
    13                 using (SqlCommand cmd = new SqlCommand(sql, sqlConn))  //2.创建Command对象
    14                 {
    15 
    16                     sqlConn.Open();                                    //3.打开并执行
    17 
    18                     resLine = cmd.ExecuteNonQuery();
    19                     //SqlDataReader srd = cmd.ExecuteReader();   //insert/delete/update
    20 
    21                     //cmd.ExecuteReader();// 查询多行多列的时候    默认情况下独占一个sqlConn连接对象
    22 
    23                     //cmd.ExecuteScalar();//返回单个结果
    24 
    25                     //cmd.Dispose();
    26 
    27                 }
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  • 原文地址:https://www.cnblogs.com/lao-K/p/12653851.html
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