这又是一篇记录平常工作笔记的博客，无论是在排版还是解说上都不会有太多要求。同时这也是一篇不上博客园首页的博客，Just记录一些工作笔记。

            string connSQL = @"Data Source=Test; Initial Catalog=DBName; Integrated Security=SSPI";using (SqlConnection conn = new SqlConnection(connSQL)){string strSQL = "select count(*) from [dbo].[TableName]";SqlCommand cmd = new SqlCommand(strSQL, conn);//创建Command对象 try{conn.Open();//一定要注意打开连接 int rows = (int)cmd.ExecuteScalar();//执行命令 Console.WriteLine("执行ExcuteScalar方法：共{0}行记录", rows);}catch (Exception ex){Console.WriteLine("\nError：\n{0}", ex.Message);}}Console.Read();

        static void Main(string[] args){var sourceData = GetInfo();UserInfo userInfo = null;foreach (DataRow item in sourceData.Rows){userInfo = new UserInfo() {Id=Convert.ToInt32(item["Id"].ToString()),UserName = item["UserName"].ToString()};}Console.Read();}static DataTable GetInfo(){string connSQL = @"Data Source=Test; Initial Catalog=DBName; Integrated Security=SSPI";string strSQL = "select * from [dbo].[User]";DataTable myDataTable = new DataTable();using (SqlConnection conn = new SqlConnection(connSQL)){SqlCommand command = new SqlCommand(strSQL, conn);conn.Open();SqlDataReader reader = command.ExecuteReader();myDataTable.Load(reader);reader.Close();}return myDataTable;}

        static void Main(string[] args){string connSQL = @"Data Source=.\SQLEXPRESS; Initial Catalog=db_MyDemo; Integrated Security=SSPI";//构造连接字符串SqlConnectionStringBuilder connStr = new SqlConnectionStringBuilder(connSQL);using(SqlConnection conn = new SqlConnection(connStr.ConnectionString)){//拼接SQL语句StringBuilder strSQL = new StringBuilder();strSQL.Append("insert into tb_SelCustomer ");strSQL.Append("values(");strSQL.Append("'liuhao','0','0','13822223333','liuhaorain@163.com','广东省深圳市宝安区',12.234556,34.222234,'422900','备注信息')");Console.WriteLine("Output SQL:\n{0}",strSQL.ToString());//创建Command对象SqlCommand cmd = new SqlCommand();cmd.Connection = conn;cmd.CommandType = CommandType.Text;cmd.CommandText = strSQL.ToString();try{conn.Open();//一定要注意打开连接int rows = cmd.ExecuteNonQuery();//执行命令Console.WriteLine("\nResult: {0}行受影响",rows);}catch(Exception ex){Console.WriteLine("\nError：\n{0}", ex.Message);}}Console.Read();}

            string connSQL = @"Data Source=Test; Initial Catalog=DBName; Integrated Security=SSPI";using (SqlConnection conn = new SqlConnection(connSQL)){SqlDataAdapter adapter = new SqlDataAdapter();string strSQL = "select * from [dbo].[User]";adapter.SelectCommand = new SqlCommand(strSQL, conn);DataSet dataset = new DataSet();adapter.Fill(dataset);DataTable dt = dataset.Tables[0];}