1. 代码结果如下图所示:
2. TblPersonBll.cs中的代码:
public class TblPersonBll { public bool IncAgeByAutoId(int autoId) { TblPersonDal dal=newTblPersonDal(); return dal.IncAgeByAutoId(autoId) >0; } }
3. TblPersonDal.cs中的代码:
public class TblPersonDal { public int IncAgeByAutoId(int autoId) { string sql="update TblPerson set age=age+1 where autoId=@id"; return SqlHelper.ExcuteNonQuery(sql, CommandType.Text,new SqlParameter("@id", autoId)); } }
4. frmIncAge.cs中的代码:
private void button1_Click(objectsender, EventArgse) { TblPersonBll bll=new TblPersonBll(); int autoId=int.Parse(textBox1.Text.Trim()); if (bll.IncAgeByAutoId(autoId)) { MessageBox.Show("ok!"); } else { MessageBox.Show("not ok!"); } }
5. SqlHelper.cs中的代码:
public static class SqlHelper { //获取连接字符串 private static string conStr=ConfigurationManager.ConnectionStrings["mysqlserver"].ConnectionString; /// <summary> ///执行insert/delete/update方法 /// </summary> /// <param name="sql"></param> /// <param name="cmdType"></param> /// <param name="pms"></param> /// <returns></returns> public static int ExcuteNonQuery(string sql, CommandType cmdType, params SqlParameter[] pms) { using (SqlConnection con=new SqlConnection(conStr)) { using (SqlCommand cmd=new SqlCommand(sql, con)) { cmd.CommandType=cmdType; if (pms!=null) { cmd.Parameters.AddRange(pms); } con.Open(); return cmd.ExecuteNonQuery(); } } } /// <summary> ///执行返回单个值方法 /// </summary> /// <param name="sql"></param> /// <param name="cmdType"></param> /// <param name="pms"></param> /// <returns></returns> public static object ExecuteScalar(string sql, CommandType cmdType, params SqlParameter[] pms) { using (SqlConnection con=new SqlConnection(conStr)) { using (SqlCommand cmd=new SqlCommand(sql, con)) { cmd.CommandType=cmdType; if (pms!=null) { cmd.Parameters.AddRange(pms); } con.Open(); returncmd.ExecuteScalar(); } } } /// <summary> ///执行返回SqlDaraReader方法 /// </summary> /// <param name="sql"></param> /// <param name="cmdType"></param> /// <param name="pms"></param> /// <returns></returns> public static SqlDataReader ExecuteDataReader(string sql, CommandType cmdType, params SqlParameter[] pms) { SqlConnection con=new SqlConnection(conStr); using (SqlCommand cmd=new SqlCommand(sql, con)) { cmd.CommandType=cmdType; if (pms!=null) { cmd.Parameters.AddRange(pms); } try
{ con.Open(); return cmd.ExecuteReader(CommandBehavior.CloseConnection); } catch { con.Close(); con.Dispose(); throw;
} } }
/// <summary> ///执行返回Datatable方法 /// </summary> /// <param name="sql"></param> /// <param name="cmdType"></param> /// <param name="pms"></param> /// <returns></returns>
public static DataTable ExecuteDataTable(string sql, CommandType cmdType, params SqlParameter[] pms)
{
DataTable dt=new DataTable();
using (SqlDataAdapter adapter=new SqlDataAdapter(sql, conStr))
{
adapter.SelectCommand.CommandType=cmdType;
if (pms!=null)
{
adapter.SelectCommand.Parameters.AddRange(pms);
}
adapter.Fill(dt);
return dt;
}
}
}