首页 > 代码库 > 分页功能 与 分类查询功能合并
分页功能 与 分类查询功能合并
功能的合并 首要的就是要找出两个功能的共同点。这里主要是用Response展示数据，通过tsql语句查询的集合作为数据源，所以这里将两个tsql合并，来实现功能的合并。
面板界面代码：
<form id="form1" runat="server"> <div> 编号：<asp:TextBox ID="TextBox1" runat="server" onkeypress="if(event.keyCode<48||event.keyCode>57)event.returnValue=http://www.mamicode.com/false;" MaxLength="11"></asp:TextBox> 名称：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> 价格：<asp:DropDownList ID="DropDownList2" runat="server"> <asp:ListItem Text="大于" Value=http://www.mamicode.com/">"></asp:ListItem> <asp:ListItem Text="小于" Value=http://www.mamicode.com/"<"></asp:ListItem> <asp:ListItem Text="大于等于" Value=http://www.mamicode.com/">="></asp:ListItem> <asp:ListItem Text="小于等于" Value=http://www.mamicode.com/"<="></asp:ListItem> <asp:ListItem Text="等于" Value=http://www.mamicode.com/"="></asp:ListItem> </asp:DropDownList> <asp:TextBox ID="TextBox3" runat="server" onkeypress="if(event.keyCode<48||event.keyCode>57)event.returnValue=http://www.mamicode.com/false;" MaxLength="11"></asp:TextBox> <asp:Button ID="Button1" runat="server" Text="查询" /><br /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> </div> <div> <table style="background-color:pink;width:100%;text-align:center"> <tr style="color:white"> <td>编号</td> <td>名称</td> <td>老价格</td> <td>新价格</td> <td>图</td> <td>信息</td> </tr> <asp:Repeater ID="Repeater1" runat="server"> <ItemTemplate> <tr style="background-color:white"> <td><%#Eval("ids") %></td> <td><%#Eval("name") %></td> <td><%#Eval("lprice") %></td> <td><%#Eval("xprice") %></td> <td><%#Eval("tu") %></td> <td><%#Eval("xiangqing") %></td> </tr> </ItemTemplate> </asp:Repeater> </table> <br /> 目前第【<asp:Literal ID="yeshu_1" runat="server" Text="1"></asp:Literal>】页，共【<asp:Literal ID="yeshu_2" runat="server"></asp:Literal>】页。 <asp:Button ID="but_1" runat="server" Text="第一页" /><asp:Button ID="but_s" runat="server" Text="上一页" /><asp:Button ID="but_x" runat="server" Text="下一页" /><asp:Button ID="but_0" runat="server" Text="最后一页" /> <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true"> <asp:ListItem Text="请选择" Value=http://www.mamicode.com/""></asp:ListItem> </asp:DropDownList> <asp:HiddenField ID="HF1" runat="server" /> <asp:HiddenField ID="HF2" runat="server" /> </div> </form>
捣鼓出来大体这样
后台代码
public partial class _Default : System.Web.UI.Page { int yehascount = 2; //每页显示几条数据 int tiaoshu = 0; //总共有多少条符合条件的数据 int yecount = 0; // 总共有几页 protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack)// 只是在页面第一次刷新的时候加载这个 { int a = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = a; yeshu_2.Text = suan().ToString(); if (Convert.ToInt32(yeshu_1.Text) <= 1) { but_1.Visible = false;//让按钮不可见 but_s.Visible = false; but_x.Visible = true; but_0.Visible = true; } else if (Convert.ToInt32(yeshu_1.Text) >= Convert.ToInt32(yeshu_2.Text)) { but_x.Visible = false; but_0.Visible = false; but_1.Visible = true; but_s.Visible = true; } for (int i = 1; i <= Convert.ToInt32(yeshu_2.Text); i++) { ListItem li = new ListItem("第" + i.ToString() + "页", i.ToString()); DropDownList1.Items.Add(li);/////下面的那个dropdownlist } } //Label1.Text = c; if (Repeater1.Items.Count <= 0) { Label1.Text = "没有找到此类商品"; } but_1.Click += but_1_Click; but_x.Click += but_x_Click; but_s.Click += but_s_Click; but_0.Click += but_0_Click; DropDownList1.SelectedIndexChanged += DropDownList1_SelectedIndexChanged; Button1.Click += Button1_Click; //各种事件 } void Button1_Click(object sender, EventArgs e) { int a = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = a; yeshu_2.Text = suan().ToString(); //yeshu_1.Text = "1"; but(); } void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) { yeshu_1.Text = DropDownList1.SelectedValue; if (yeshu_1.Text != "请选择") { int a = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = a; yeshu_2.Text = suan().ToString(); } but(); } void but_0_Click(object sender, EventArgs e) { if (Convert.ToInt32(yeshu_1.Text) < Convert.ToInt32(yeshu_2.Text)) { yeshu_1.Text = yeshu_2.Text; if (yeshu_1.Text != "请选择") { int a = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = a; yeshu_2.Text = suan().ToString(); } } but(); } void but_s_Click(object sender, EventArgs e) { if (Convert.ToInt32(yeshu_1.Text) > 1) { int a = Convert.ToInt32(yeshu_1.Text) - 1; yeshu_1.Text = a.ToString(); if (yeshu_1.Text != "请选择") { int aa = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = aa; yeshu_2.Text = suan().ToString(); } } but(); } void but_x_Click(object sender, EventArgs e) { tiaojian(); if (Convert.ToInt32(yeshu_1.Text) < Convert.ToInt32(yeshu_2.Text)) { int a = 1 + Convert.ToInt32(yeshu_1.Text); yeshu_1.Text = a.ToString(); if (yeshu_1.Text != "请选择") { int aa = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = aa; yeshu_2.Text = suan().ToString(); } but(); } } void but_1_Click(object sender, EventArgs e) { yeshu_1.Text = "1"; if (yeshu_1.Text != "请选择") { int aa = new taobaodata().selectcount(count()); List<taobao> tlist = tiaojian(); Repeater1.DataSource = tlist; Repeater1.DataBind(); tiaoshu = aa; yeshu_2.Text = suan().ToString(); } but(); } //计算一共有多少页 public int suan() { int a = 0; yecount = Convert.ToInt32(Math.Ceiling(tiaoshu / Convert.ToDecimal(yehascount))); a = yecount; return a; } public void but() { if (Convert.ToInt32(yeshu_1.Text) <= 1) { but_1.Visible = false; but_s.Visible = false; but_x.Visible = true; but_0.Visible = true; } else if (Convert.ToInt32(yeshu_1.Text) >= Convert.ToInt32(yeshu_2.Text)) { but_x.Visible = false; but_0.Visible = false; but_1.Visible = true; but_s.Visible = true; } if (Convert.ToInt32(yeshu_1.Text) > 1 && Convert.ToInt32(yeshu_1.Text) < Convert.ToInt32(yeshu_2.Text)) { but_1.Visible = true; but_s.Visible = true; but_x.Visible = true; but_0.Visible = true; } } public List<taobao> tiaojian() { List<taobao> tlist = new List<taobao>(); string dd = ""; string c = ""; //拼接数据库查询字符串； bool ok = false; if (TextBox1.Text.Trim().Length > 0) { if (!ok) { c += "and ids = " + TextBox1.Text.Trim() + " "; dd += " where ids = " + TextBox1.Text.Trim() + " "; ok = true; } else { c += "and ids = " + TextBox1.Text.Trim() + " "; dd += "and ids = " + TextBox1.Text.Trim() + " "; } } if (TextBox2.Text.Trim().Length > 0) { if (ok) { c += "and name like ‘%" + TextBox2.Text.Trim() + "%‘ "; dd += "and name like ‘%" + TextBox2.Text.Trim() + "%‘"; } else { c += "and name like ‘%" + TextBox2.Text.Trim() + "%‘ "; dd += "where name like ‘%" + TextBox2.Text.Trim() + "%‘ "; ok = true; } } if (TextBox3.Text.Trim().Length > 0) { if (ok) { c += "and lprice " + DropDownList2.SelectedValue + " " + TextBox3.Text + ""; dd += "and lprice " + DropDownList2.SelectedValue + " " + TextBox3.Text + ""; } else { c += "and lprice " + DropDownList2.SelectedValue + " " + TextBox3.Text + " "; dd += "where lprice " + DropDownList2.SelectedValue + " " + TextBox3.Text + " "; ok = true; } } string asfasdf = "select top " + yehascount + " * from taobao where ids not in(select top " + yehascount * (Convert.ToInt32(yeshu_1.Text) - 1) + " ids from taobao " + dd + ") " + c + " "; tlist = new taobaodata().selectall(asfasdf); return tlist; } public string count() { string dd = "select Count(*)from taobao "; bool ok = false; if (TextBox1.Text.Trim().Length > 0) { if (!ok) { dd += " where ids = " + TextBox1.Text.Trim() + " "; ok = true; } else { dd += "and ids = " + TextBox1.Text.Trim() + " "; } } if (TextBox2.Text.Trim().Length > 0) { if (ok) { dd += "and name like ‘%" + TextBox2.Text.Trim() + "%‘"; } else { dd += "where name like ‘%" + TextBox2.Text.Trim() + "%‘ "; ok = true; } } if (TextBox3.Text.Trim().Length > 0) { if (ok) { dd += "and lprice " + DropDownList2.SelectedValue + " " + TextBox3.Text + ""; } else { dd += "where lprice " + DropDownList2.SelectedValue + " " + TextBox3.Text + " "; ok = true; } } return dd; } }
分页功能 与 分类查询功能合并
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