生手和FinallyJane一起学习ASP.NET

那么我们就先来学习Home.aspx的写法

 1 <div id="divtop">
 2         <div id ="header_panel" >
 3             <div id="header_section">
 4                 <div id="title_section">  B B S  </div>
 5                 <div id="tagline">Welcome to you!</div> 
 6             </div>
 7         </div>
 8         <div  id ="menu_panel" >
 9             <div id="menu_section">
10               
11               <asp:LinkButton ID="LinkButton3" runat="server"  OnClick="LinkButton3_Click">实事</asp:LinkButton>
12               <asp:LinkButton ID="LinkButton2" runat="server"  OnClick="LinkButton2_Click">科学</asp:LinkButton>
13               <asp:LinkButton ID="LinkButton1" runat="server"  OnClick="LinkButton1_Click">文学</asp:LinkButton>           
14               <asp:LinkButton ID="LinkButton4" runat="server"  OnClick="LinkButton4_Click">体育</asp:LinkButton>
15             </div>
16         </div>
17       </div>

下面我们进入Homeaspx.cs中看看那三个LinkButton的作用

 1  /// <summary>
 2         /// 点击不同的帖主题显示不同的内容
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         protected void LinkButton1_Click(object sender, EventArgs e)
 7         {
 8             flag = 1;
 9             showGv(flag, k);
10         }
11         protected void LinkButton2_Click(object sender, EventArgs e)
12         {
13             flag = 2;
14             //this.Page_Load(sender, e);
15             showGv(flag, k);
16         }
17         protected void LinkButton3_Click(object sender, EventArgs e)
18         {
19             flag = 3;
20             //this.Page_Load(sender, e);
21             showGv(flag, k);
22         }
23         protected void LinkButton4_Click(object sender, EventArgs e)
24         {
25             flag = 4;
26            // this.Page_Load(sender, e);
27             showGv(flag, k);
28         }
29 

下面我们看看ShowGv的作用

 1  /// <summary>
 2         /// 在gridview中显示数据
 3         /// </summary>
 4         /// <param name="flag">主题序号</param>
 5         /// <param name="k">页号</param>
 6         void showGv(int flag, int k)
 7         {
 8             if (flag == 0)                                                                                       //所有的部分
 9             {
10                 string sql = "select gid,tname,tcontent,tdata,tclick,tid,treply from tip order by tclick desc";//order by tclick desc是指按帖子的点击数从高往低排列
11                 Sql(sql, k, Lab_NonTip);
12             }
13             if (flag == 1)                                                                                    //主题等于1的部分
14             {
15                 string sql = "select gid,tname,tcontent,tdata,tclick,tid,treply from tip where ttheme=1 order by tclick desc ";
16                 Sql(sql, k, Lab_NonTip);
17             }
18             if (flag == 2)                                                                                    //主题等于2的部分
19             {
20                 string sql = "select gid,tname,tcontent,tdata,tclick,tid,treply from tip where ttheme=2 order by tclick desc";
21                 Sql(sql, k, Lab_NonTip);
22             }
23             if (flag == 3)                                                                                   //主题等于3的部分
24             {
25                 string sql = "select gid,tname,tcontent,tdata,tclick ,tid,treply from tip where ttheme=3 order by tclick desc";
26                 Sql(sql, k, Lab_NonTip);
27             }
28             if (flag == 4)                                                                                   //主题等于4的部分
29             {
30                 string sql = "select gid,tname,tcontent,tdata,tclick,tid,treply from tip where ttheme=4 order by tclick desc";
31                 Sql(sql, k, Lab_NonTip);
32             }
33         }

然后我们重点看一下负责数据库操作的Sql函数，以及参数 Lab_NonTip的值

 /// <summary>
        /// 读取数据库数据，并绑定到gridview
        /// </summary>
        /// <param name="sql">数据库操作语句</param>
        /// <param name="j">页码号</param>
        protected void Sql(string sql, int j, Label Label1)
        {
            gvShow.PageIndex = j;
            string connString = @"Data Source=.;Initial Catalog=msgBord;Integrated Security=True ";
            SqlConnection connection = new SqlConnection(connString);
            connection.Open();
            SqlDataAdapter dataAdapter = new SqlDataAdapter(sql, connection);
            DataSet dataSet = new DataSet();
            dataAdapter.Fill(dataSet, "test");
            if (dataSet.Tables["test"].Rows.Count < 1)
            {
                Label1.Visible = true;
            }
            else
            {
                Label1.Visible = false;
            }
            gvShow.DataSource = dataSet;
            gvShow.DataBind();
            connection.Close();
            cut();//为了美观将数据截断显示
        }

再来看下CUT　函数

  /// <summary>
        /// 用于将gridview的字符截取掉长度过大项
        /// </summary>
        protected void cut()
        {
            for (int i = 0; i < gvShow.Rows.Count; i++)
            {
                for (int j = 0; j < gvShow.Rows[i].Cells.Count - 1; j++)
                {
                    string s = gvShow.Rows[i].Cells[j].Text;
                    string t = s;
                    if (s.Length >= 10)
                    {
                        t = s.Substring(0, 8) + ".....";
                    }
                    gvShow.Rows[i].Cells[j].Text = t;
                }
            }
        }

这样Home页面头部的动作已经网页显示我们就已经做完了

其他部分代码依旧照此分析，大家原谅我吧，这么一点点写实在是太麻烦了。我现在就把我改过的代码上传，值得注意的是代码中有一个数据库msgBord,大家不要考到MSSQL 的Data目录后在附加，就直接在当前目录中附加就OK了。如果想改数据库配置路径的话，请看程序中的配置文件。