原来已经写了一个repeater控件的分页，今天有些了一个优化的程序。
1.解决了当数据条数，小于要显示的数据条数时，出现上一页按钮和还能继续递减的问题。
2.同时，还添加了在显示数据的表中进行删除和修改数据。
3.还解决了页面间的传值问题，（当点击Edit按钮时，页面跳转到另一个界面，也就是修改信息界面，然后进行修改，修改完成后保存并返回主界面。）
以上就是，新增的内容。
下面是代码：
总计使用了两个页面，一个是显示数据的页面（Default.aspx）另一个是修改信息的页面（Edit.aspx）：
首先是Default.aspx页面的前台代码：
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Debug ="true"%>
2
3 <!DOCTYPE html>
4
5 <html xmlns="http://www.w3.org/1999/xhtml">
6 <head runat="server">
7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
8 <title></title>
9 </head>
10 <body>
11 <form id="form1" runat="server">
12 <div>
13 <h1>Repeater分页</h1>
14
15 <asp:Repeater ID="Repeater1" runat="server" OnItemCommand ="Repeater1_ItemCommand">
16 <HeaderTemplate>
17 <table>
18 <tr><td colspan="7" style="text-align:center; background-color:#76a0ae; color:#ffffff; height:20px">员工信息</td></tr>
19 <tr style="color:#1e486e">
20 <td>姓名</td>
21 <td>年龄</td>
22 <td>性别</td>
23 <td>工作</td>
24 <td colspan="2">操作</td>
25 </tr>
26 </HeaderTemplate>
27 <ItemTemplate>
28 <tr>
29 <asp:HiddenField ID="hfId" Value=‘<%#Eval("PID")%>‘ runat="server" />
30 <td class="tdleft">
31 <%#Eval("PName")%>
32 </td>
33
34 <td>
35 <%#Eval("PAge") %>
36 </td>
37
38 <td>
39 <%#Eval("PSex") %>
40 </td>
41
42 <td>
43 <%#Eval("PJob") %>
44 </td>
45
46 <td>
47 <asp:LinkButton ID="lnkEdit" CommandName="EditData" runat="server">Edit</asp:LinkButton>
48 </td>
49
50 <td>
51 <asp:LinkButton ID="lnkDelete" CommandName="DelData" runat="server">Delete</asp:LinkButton>
52 </td>
53
54 </tr>
55 </ItemTemplate>
56 <AlternatingItemTemplate>
57 <tr style=" background-color:#f0f5f8">
58 <asp:HiddenField ID="hfId" Value=‘<%#Eval("PID")%>‘ runat="server" />
59 <td class="tdleft">
60 <%#Eval("PName")%>
61 </td>
62
63 <td>
64 <%#Eval("PAge") %>
65 </td>
66
67 <td>
68 <%#Eval("PSex") %>
69 </td>
70
71 <td>
72 <%#Eval("PJob") %>
73 </td>
74
75 <td>
76 <asp:LinkButton ID="lnkEdit" CommandName="EditData" runat="server">Edit</asp:LinkButton>
77 </td>
78
79 <td>
80 <asp:LinkButton ID="lnkDelete" CommandName="DelData" runat="server">Delete</asp:LinkButton>
81 </td>
82
83 </tr>
84 </AlternatingItemTemplate>
85 <FooterTemplate>
86 <tr id="noData" runat="server" Visible="<%#Repeater1.Items.Count==0 %>" >
87 <td colspan="7">
88 <div>
89 <p style ="text-align:center">没有相关的数据</p>
90 </div>
91 </td>
92 </tr>
93 </table>
94 </FooterTemplate>
95 </asp:Repeater>
96
97 <div id="fenye">
98 <asp:Label ID="lbNow" runat="server" Text="当前页"></asp:Label>
99 <asp:Label ID="lbPage" runat="server" Text="1"></asp:Label>
100 <asp:Label ID="lbAll" runat="server" Text="总页数"></asp:Label>
101 <asp:Label ID="lbCount" runat="server" Text=""></asp:Label>
102 <asp:LinkButton ID="lbtnFirst" runat="server" onclick ="lbtnFirst_Click">首页</asp:LinkButton>
103 <asp:LinkButton ID="lbtnUp" runat="server" onclick ="lbtnUp_Click">上一页</asp:LinkButton>
104 <asp:LinkButton ID="lbtnDown" runat="server" onclick ="lbtnDown_Click">下一页</asp:LinkButton>
105 <asp:LinkButton ID="lbtnLast" runat="server" onclick ="lbtnLast_Click">尾页</asp:LinkButton>
106 <asp:DropDownList ID="DropDownList1" runat="server" Width="80px">
107 </asp:DropDownList>
108 <asp:LinkButton ID="lbtnGo" runat="server" BackColor="LightBlue"
109 BorderWidth="2px" BorderColor="Blue" onclick ="lbtnGo_Click" style="width: 20px">Go</asp:LinkButton>
110 </div>
111 <br />
112 </div>
113
114 </form>
115 </body>
116 </html>
然后是Default.aspx的后台代码：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI;
6 using System.Web.UI.WebControls;
7
8 using System.Data;
9 using System.Data.SqlClient;
10 using System.Configuration;
11
12 public partial class _Default : System.Web.UI.Page
13 {
14 SqlConnection sqlConn = new SqlConnection(ConfigurationManager.ConnectionStrings["LinqTestConnectionString"].ToString());
15
16 public SqlCommand sqlCmd = null;
17
18 int countPage = 20;//每一页有多少条数据
19
20 protected void Page_Load(object sender, EventArgs e)
21 {
22 if (!IsPostBack)
23 {
24 DropListBind();//为DropDownList赋值
25 Show();//初始化显示第一页，默认当前为第一页
26 State();//初始化导航按钮的使用状态
27 }
28 }
29
30 /// <summary>
31 /// 第一页
32 /// </summary>
33 /// <param name="sender"></param>
34 /// <param name="e"></param>
35 protected void lbtnFirst_Click(object sender, EventArgs e)
36 {
37 lbPage.Text = "1";
38 Show();
39 State();
40 }
41
42 /// <summary>
43 /// 上一页
44 /// </summary>
45 /// <param name="sender"></param>
46 /// <param name="e"></param>
47 protected void lbtnUp_Click(object sender, EventArgs e)
48 {
49 lbPage.Text = (Convert.ToInt32(lbPage.Text) - 1).ToString();
50 Show();
51 State();
52 }
53
54 /// <summary>
55 /// 下一页
56 /// </summary>
57 /// <param name="sender"></param>
58 /// <param name="e"></param>
59 protected void lbtnDown_Click(object sender, EventArgs e)
60 {
61 lbPage.Text = (Convert.ToInt32(lbPage.Text) + 1).ToString();
62 Show();
63 State();
64 }
65
66 /// <summary>
67 /// 最后一页
68 /// </summary>
69 /// <param name="sender"></param>
70 /// <param name="e"></param>
71 protected void lbtnLast_Click(object sender, EventArgs e)
72 {
73 lbPage.Text = lbCount.Text;
74 Show();
75 State();
76 }
77
78 /// <summary>
79 /// GO按钮
80 /// </summary>
81 /// <param name="sender"></param>
82 /// <param name="e"></param>
83 protected void lbtnGo_Click(object sender, EventArgs e)
84 {
85 lbPage.Text = DropDownList1.SelectedValue;
86 Show();
87 State();
88 }
89
90 //绑定DropDwonList控件
91 public void DropListBind()
92 {
93 sqlConn.Open();
94
95 sqlCmd = new SqlCommand("select count(*) from Person", sqlConn);//获取数据库中信息的总条数
96
97 int page = Convert.ToInt32(sqlCmd.ExecuteScalar());
98
99 //如果当前页1，且数据库中的数据行小于每一页要显示的数据行，则Label控件全部设置为不可用。
100 if (Convert.ToInt32(lbPage.Text) == 1 && (page - countPage) < 0)
101 {
102 lbtnFirst.Enabled = false;
103 lbtnUp.Enabled = false;
104 lbtnLast.Enabled = false;
105 lbtnDown.Enabled = false;
106 }
107
108 //每页显示countPage条，算出总页数，并为DropDownList赋值
109
110 //使用ceiling（天花板函数）--MSDN示例
111 /*
112 * double[] values = {7.03, 7.64, 0.12, -0.12, -7.1, -7.6};
113 * Console.WriteLine(" Value Ceiling Floor\n");
114 * foreach (double value in values)
115 * {
116 * Console.WriteLine("{0,7} {1,16} {2,14}", value, Math.Ceiling(value), Math.Floor(value));
117 * }
118 * The example displays the following output to the console:
119 * Value Ceiling Floor
120 * 7.03 8 7
121 * 7.64 8 7
122 * 0.12 1 0
123 * -0.12 0 -1
124 * -7.1 -7 -8
125 * -7.6 -7 -8
126 */
127 //为什么Page要乘以1.0，因为如果不乘的话，就会默认转换成整型，得不到小数，就无法使用ceiling方法了。
128 this.lbCount.Text = (Math.Ceiling(((page * 1.0 / countPage)))).ToString();
129
130 int[] num = new int[Convert.ToInt32(lbCount.Text)];
131
132 for (int i = 1; i <= Convert.ToInt32(lbCount.Text); i++)//如果使用 i= 0，那么在前台显示的时候买第一个值是0.
133 {
134 num[i - 1] = i;
135 }
136
137 sqlConn.Close();
138
139 DropDownList1.DataSource = num;
140
141 DropDownList1.DataBind();
142 }
143
144 /// <summary>
145 /// 状态设置
146 /// </summary>
147 public void State()
148 {
149 if (lbPage.Text == "1")//如果当前页为第一页，则前一页和首页按钮禁用
150 {
151 lbtnFirst.Enabled = false;
152 lbtnUp.Enabled = false;
153 lbtnLast.Enabled = true;
154 lbtnDown.Enabled = true;
155 }
156
157 if (lbPage.Text == lbCount.Text)//如果当前页为最后一页，则后一页和尾页按钮禁用
158 {
159 lbtnFirst.Enabled = true;
160 lbtnUp.Enabled = true;
161 lbtnLast.Enabled = false;
162 lbtnDown.Enabled = false;
163 }
164 if (Convert.ToInt32(lbPage.Text) > 1 && Convert.ToInt32(lbPage.Text) < Convert.ToInt32(lbCount.Text))//如果当前也在首页和尾页之间则四个按钮均可用
165 {
166 lbtnFirst.Enabled = true;
167 lbtnUp.Enabled = true;
168 lbtnLast.Enabled = true;
169 lbtnDown.Enabled = true;
170 }
171 }
172
173 /// <summary>
174 /// 显示数据，绑定数据
175 /// </summary>
176 public void Show()
177 {
178 //从数据库中筛选信息，仅加载当前请求的那一页的信息，效率会相对比较高，并非全部加载
179
180
181 //string sql = "select * from Person where PID>‘" + (Convert.ToInt32(lbPage.Text) - 1) * countPage + "‘ and PID<=‘" + Convert.ToInt32(lbPage.Text) * countPage + "‘ order by PID ASC";
182
183 string sql = @"select * from
184 (
185 select ROW_NUMBER() over(order by PID) as rownum, PID, PName, PAge, PSex, PJob from Person
186 ) as a
187 where a.rownum > ‘" + (Convert.ToInt32(lbPage.Text) - 1) * countPage + "‘ and a.rownum <=‘" + Convert.ToInt32(lbPage.Text) * countPage + "‘ order by a.rownum ASC";
188
189 sqlCmd = new SqlCommand(sql, sqlConn);
190 SqlDataAdapter sAdapter = new SqlDataAdapter(sqlCmd);
191 DataSet ds = new DataSet();
192 sAdapter.Fill(ds, "Result");
193 sqlConn.Close();
194 Repeater1.DataSource = ds.Tables["Result"].DefaultView;
195 Repeater1.DataBind();
196 }
197 protected void Repeater1_ItemCommand(object source, RepeaterCommandEventArgs e)
198 {
199 if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
200 {
201 int row = e.Item.ItemIndex;
202
203 HiddenField hfId = e.Item.FindControl("hfId") as HiddenField;
204
205 int Id = int.Parse(hfId.Value);
206
207 string cmdName = e.CommandName.Trim();
208
209 switch (cmdName)
210 {
211 case "EditData":
212 {
213 Response.Redirect("Edit.aspx?PID=" + Id.ToString());
214 }break;
215 case "DelData":
216 {
217 sqlConn.Open();
218
219 SqlParameter[] para = new SqlParameter[]
220 {
221 new SqlParameter("@PID", Id)
222 };
223
224 string txt = "DELETE FROM Person WHERE PID = @PID";
225
226 SqlCommand cmd = new SqlCommand(txt, sqlConn);
227
228 cmd.Parameters.AddRange(para);
229
230 int res = cmd.ExecuteNonQuery();
231
232 if (res > 0)
233 {
234 Response.Write("<script language=‘javascript‘>alert(‘删除成功！‘);</script>");
235 }
236 else
237 {
238 Response.Write("<script language=‘javascript‘>alert(‘无法删除！‘);</script>");
239 }
240
241 Show();
242
243 State();
244
245 sqlConn.Close();
246 }break;
247 default:
248 break;
249 }
250 }
251 }
252 }
紧接着是Edit.aspx页面的前台代码：
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Edit.aspx.cs" Inherits="Edit" %> 2 3 <!DOCTYPE html> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> 8 <title></title> 9 </head> 10 <body> 11 <form id="form1" runat="server"> 12 <div> 13 <asp:Label ID="Label1" runat="server" Text="姓名"></asp:Label> 14 <asp:TextBox ID="txt_name" runat="server"></asp:TextBox> 15 16 <br /><br /> 17 18 <asp:Label ID="Label2" runat="server" Text="年龄"></asp:Label> 19 <asp:TextBox ID="txt_age" runat="server"></asp:TextBox> 20 21 <br /><br /> 22 23 <asp:Label ID="Label3" runat="server" Text="性别"></asp:Label> 24 <asp:TextBox ID="txt_sex" runat="server"></asp:TextBox> 25 26 <br /><br /> 27 28 <asp:Label ID="Label4" runat="server" Text="工作"></asp:Label> 29 <asp:TextBox ID="txt_job" runat="server"></asp:TextBox> 30 31 <br /><br /> 32 33 <asp:Button ID="Button1" runat="server" Text="确认修改" OnClick ="Button1_Click"/> 34 <asp:Button ID="Button2" runat="server" Text="重置" /> 35 </div> 36 </form> 37 </body> 38 </html>
和Edit.aspx的后台代码：
1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4 using System.Web;
5 using System.Web.UI;
6 using System.Web.UI.WebControls;
7
8 using System.Data;
9 using System.Data.SqlClient;
10 using System.Configuration;
11
12 public partial class Edit : System.Web.UI.Page
13 {
14 string connectionString = ConfigurationManager.ConnectionStrings["LinqTestConnectionString"].ConnectionString;
15
16 string SPID = string.Empty;
17
18 protected void Page_Load(object sender, EventArgs e)
19 {
20 if (!IsPostBack)
21 {
22 databind();
23 }
24 }
25
26 public void databind()
27 {
28 if (Request.QueryString["PID"].ToString() != null)
29 {
30 SPID = Request.QueryString["PID"].ToString();
31 }
32 else
33 {
34 Response.Write("<script language=‘javascript‘>alert(‘没有值！‘);</script>");
35 }
36
37 SqlConnection connection = new SqlConnection(connectionString);
38
39 SqlParameter[] para = new SqlParameter[]
40 {
41 new SqlParameter("@SPID", SPID)
42 };
43
44 string sql = "SELECT PName, PSex, PAge, PJob FROM Person WHERE PID = @SPID";
45
46 connection.Open();
47
48 SqlDataAdapter adp = new SqlDataAdapter(sql, connection);
49
50 adp.SelectCommand.Parameters.AddRange(para);//又是一个新的知识点，使用SqlDataAdapter时，如何还能使用参数。
51
52 DataTable dt = new DataTable();
53
54 adp.Fill(dt);
55
56 this.txt_name.Text = dt.Rows[0][0].ToString();
57 this.txt_name.Focus();
58 this.txt_age.Text = dt.Rows[0][2].ToString();
59 this.txt_sex.Text = dt.Rows[0][1].ToString();
60 this.txt_job.Text = dt.Rows[0][3].ToString();
61
62 connection.Close();
63 }
64
65 protected void Button1_Click(object sender, EventArgs e)
66 {
67 SPID = Request.QueryString["PID"].ToString();
68
69 SqlConnection connection_2 = new SqlConnection(connectionString);
70
71 connection_2.Open();
72
73 SqlParameter[] para_2 = new SqlParameter[]
74 {
75 new SqlParameter ("@SPID", SPID),
76 new SqlParameter("@pname", this.txt_name.Text),
77 new SqlParameter("@page", this.txt_age.Text),
78 new SqlParameter("@psex", this.txt_sex.Text),
79 new SqlParameter("@pjob", this.txt_job.Text)
80 };
81
82 string sql_2 = "UPDATE Person SET PName = @pname, PAge = @page, PSex = @psex, PJob = @pjob WHERE PID = @SPID";
83
84 SqlCommand cmd_2 = new SqlCommand(sql_2, connection_2);
85
86 cmd_2.Parameters.AddRange(para_2);
87
88 int res = cmd_2.ExecuteNonQuery();
89
90 if (res > 0)
91 {
92 Response.Write("<script language=‘javascript‘>alert(‘修改成功！‘);</script>");
93 Response.Write("<script language=‘javascript‘>window.location.href=‘Default.aspx‘;</script>");
94 }
95 else
96 {
97 Response.Write("<script language=‘javascript‘>alert(‘修改失败！‘);</script>");
98 }
99 }
100 /// <summary>
101 /// 清空文本框
102 /// </summary>
103 /// <param name="sender"></param>
104 /// <param name="e"></param>
105 protected void Button2_Click(object sender, EventArgs e)
106 {
107 this.txt_name.Text = "";
108 this.txt_age.Text = "";
109 this.txt_sex.Text = "";
110 this.txt_job.Text = "";
111 }
112 }
文件夹目录：
运行效果，在开头已经给出。
时间： 2024-10-18 19:57:29