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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 }
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运行效果，在开头已经给出。
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原文地址：http://www.cnblogs.com/KTblog/p/4280053.html
