最后的冲刺作业

计划：

估计需要4-5天

开发：

需求分析：

    用户故事：作为一个赛事管理人员，我希望了解每一场比赛的比分，每队的总比分，每队的计分，以便进行排名。

    从分析用例故事可以知道完成此程序需要这两项任务：选择队伍和查询比赛记录。

生成文档：画了构图

代码规范：

使用vs2010

具体设计：

下面是活动图：

 

具体实现：

 

 

具体代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;
namespace WindowsFormsApplication1
{
   public static class SqlHelper
    {
        private static readonly string constr ="server=.;database=itcast;integrated security=true";
        //增删改
        public static int ExecuteNonQuery(string sql, params SqlParameter[] pams)
        {

            using (SqlConnection conn = new SqlConnection(constr))
            {
                using (SqlCommand comm = new SqlCommand(sql, conn))
                {
                    if (pams != null)
                    {
                        comm.Parameters.AddRange(pams);
                    }
                    conn.Open();
                    return comm.ExecuteNonQuery();
                }
            }

        }
        //返回SqlDataReader
        public static SqlDataReader ExecuteReader(string sql, params SqlParameter[] pams)
        {

            SqlConnection conn = new SqlConnection(constr);
            using (SqlCommand comm = new SqlCommand(sql, conn))
            {
                if (pams != null)
                {
                    comm.Parameters.AddRange(pams);

                }
                conn.Open();
                return comm.ExecuteReader(CommandBehavior.CloseConnection);

            }
        }
        public static object ExecuteScalar(string sql, params SqlParameter[] pams)
        {

            using (SqlConnection conn = new SqlConnection(constr))
            {
                using (SqlCommand comm = new SqlCommand(sql, conn))
                {
                    if (pams != null)
                    {
                        comm.Parameters.AddRange(pams);
                    }
                    conn.Open();
                    return comm.ExecuteScalar();
                }

            }
        }
        public static DataTable ExecuteDataTable(string sql, params SqlParameter[] pams)
        {
            DataTable dt = new DataTable();

            using (SqlDataAdapter adapter = new SqlDataAdapter(sql, constr))
            {
                if (pams != null)
                {
                    adapter.SelectCommand.Parameters.AddRange(pams);
                }
                adapter.Fill(dt);
            }
            return dt;
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void DataGridviewDataBind(string sql = "select * from student")
        {
            dgvstudent.DataSource = SqlHelper.ExecuteDataTable(sql);
            //1.建临时仓库
            //DataSet ds = new DataSet();
            //2.建路
            //string strConn = "data source=.;initial catalog=itcast; integrated security=true";
            //SqlConnection connection = new SqlConnection(strConn);
            //3.卡车-装数据

            //SqlDataAdapter ada = new SqlDataAdapter(sql, connection);
            //4.卸数据
            //ada.Fill(ds);
        }
        private void btn_Click(object sender, EventArgs e)
        {
            StringBuilder sql = new StringBuilder();
            sql.Append("select * from student where 1=1");
            string StuNum = txtStuNum1.Text.Trim();
            if (!string.IsNullOrEmpty(StuNum))
            {
                sql.Append(" and stuNum='" + StuNum + "'");
            }
            string StuName = txtStuName1.Text.Trim();
            if (!string.IsNullOrEmpty(StuName))
            {
                sql.Append(" and stuName like '%" + StuName + "%'");
            }
            string StuClass = txtStuClass1.Text.Trim();
            if (!string.IsNullOrEmpty(StuClass))
            {
                sql.Append(" and stuClass like '%" + StuClass + "%'");
            }
            string subject = cmbsubject.Text.Trim();
            if (!string.IsNullOrEmpty(subject))
            {
                if (subject != "全部")
                {
                    sql.Append(" and subject like '%" + subject + "%'");

                }
                DataGridviewDataBind(sql.ToString());

            }
        }
    }
}