_控件名".2.如果有圖片之類需要路徑的請用：/a/b/c.jpg3.需要調用用戶控件事件的話需要寫一個委托。以下面做一個查詢為例html代碼<%@ControlLangua" />

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如何實現用戶自己定義控件。

系統 1619 0
1.?新建 *.axcx 文件。
2. 跟一般網頁一樣放控件。
3. 在事件里面寫處理過程。
4. 拖到aspx頁面就可以用了。

過程注意的地方。
1.如果用到javascript ，用document.getElementById()來查找服務器控件需要在控件名前面加上 "<%= this.ClientID %>_控件名".
2.如果有圖片之類需要路徑的請用：/ a / b / c.jpg
3.需要調用用戶控件事件的話需要寫一個委托。
以下面做一個查詢為例
html 代碼
<% @?Control?Language = " c# " ?AutoEventWireup = " false " ?Codebehind = " Search.ascx.cs " ?Inherits = " Search " ?TargetSchema = " http://schemas.microsoft.com/intellisense/ie5 " ?enableViewState = " True " %>
< script >
???????????? var ?ParentName? = ? " <%=?this.ClientID?%> " ;
???????????? function ?initXMLHTTPRequest() {
???????????????? var ?xRequest? = ? null ;
???????????????? if ?(?window.XMLHttpRequest?) {
????????????????????xRequest? = ? new ?XMLHttpRequest();
????????????????} ? else ? if ?(?window.ActiveXObject?) {
????????????????????xRequest? = ? new ?ActiveXObject( " Microsoft.XMLHTTP " );
????????????????}
???????????????? return ?xRequest;
????????????}
???????????? function ?GetDataSetCity(obj)
???????????? {????????????????
???????????????? var ?svalue = obj.value;
???????????????? var ?webFileUrl? = ? " ?father= " ? + ?svalue;
　　???????????? var ?result? = ? "" ;
　　???????????? var ?xmlHttp? = ?initXMLHTTPRequest();? // new?ActiveXObject("MSXML2.XMLHTTP");
　　????????????xmlHttp.open( " POST " ,?webFileUrl,? false );
　　????????????xmlHttp.send( "" );
　　????????????
　　????????????result? = ?xmlHttp.responseText;

???????????????? if (result? != ? "" )
???????????????? {
????????????????????document.all(ParentName + " _dropCity " ).length = 0 ;
　???????????????????? var ?piArray? = ?result.split( " , " );
　???????????????????? for ( var ?i = 0 ;i < piArray.length;i ++ )
　???????????????????? {
　???????????????????????? var ?ary1? = ?piArray[i].toString().split( " | " );
　????????????????????????document.all(ParentName + " _dropCity " ).options.add( new ?Option(ary1[ 1 ].toString(),ary1[ 0 ].toString()));
　????????????????????}
????????????????}
???????????????? else
???????????????? {
???????????????????? for ?(i = (document.all(ParentName + " _dropCity " ).length - 1 );i >= 0 ;i -- ) {
????????????????????????document.all(ParentName + " _dropCity " ).options.remove(i);
????????????????????}
????????????????????document.all(ParentName + " _dropCity " ).options.add( new ?Option( " 城市 " , " 0 " ));
????????????????}
????????????}
???????????? function ?getData()
???????????? {
???????????????? var ?province = document.getElementById(ParentName + " _dropProvince " );
???????????????? var ?pindex? = ?province.selectedIndex;
???????????????? var ?pValue? = ?province.options[pindex].value;
???????????????? var ?pText?? = ?province.options[pindex].text;
????????????????
???????????????? var ?city = document.getElementById(ParentName + " _dropCity " );
???????????????? var ?cindex? = ?city.selectedIndex;
???????????????? var ?cValue? = ?city.options[cindex].value;
???????????????? var ?cText?? = ?city.options[cindex].text;
????????????????
????????????????document.getElementById(ParentName + " _hidprovince " ).value = pText;
????????????????document.getElementById(ParentName + " _hidcity " ).value = cText;
????????????}
???????????? function ?JHR()
???????????? {
????????????????window.history.back();
????????????}
</ script >
< table? cellSpacing ="0" ?cellPadding ="0" ?width ="100%" ?border ="0" >
???? < tr >
???????? < td? vAlign ="bottom" ?align ="right" ?width ="24" ?height ="218" >< IMG? height ="218" ?src ="/yizhi/images/chaxun_12.gif" ?width ="24" ></ td >
???????? < td? vAlign ="bottom" ?align ="left" >
???????????? < table? id ="__01" ?height ="235" ?cellSpacing ="0" ?cellPadding ="0" ?width ="216" ?border ="0" >
???????????????? < tr >
???????????????????? < td? colSpan ="3" >< IMG? height ="102" ?alt ="" ?src ="/yizhi/images/chaxun_01.gif" ?width ="216" ></ td >
???????????????? </ tr >
???????????????? < tr >
???????????????????? < td >< IMG? height ="8" ?alt ="" ?src ="/yizhi/images/chaxun_02.gif" ?width ="15" ></ td >
???????????????????? < td >< IMG? height ="8" ?alt ="" ?src ="/yizhi/images/chaxun_03.gif" ?width ="185" ></ td >
???????????????????? < td >< IMG? height ="8" ?alt ="" ?src ="/yizhi/images/chaxun_04.gif" ?width ="16" ></ td >
???????????????? </ tr >
???????????????? < tr >
???????????????????? < td? background ="/yizhi/images/chaxun_05.gif" ?width ="15" ></ td >
???????????????????? < td? align ="center" ?width ="185" ?bgColor ="#f7f7f7" ?height ="103" >
???????????????????????? < table? cellSpacing ="5" ?cellPadding ="0" ?width ="90%" ?border ="0" >
???????????????????????????? < tr >
???????????????????????????????? < td? align ="left" >< asp:textbox? id ="txtName" ?Runat ="server" > 請輸入關鍵字 </ asp:textbox >< a? id ="aSearchs" ?onclick ="JHR();" ?href ="UserListAll.aspx" ?target ="_blank" ></ td >
???????????????????????????? </ tr >
???????????????????????????? < tr >
???????????????????????????????? < td? align ="left" >< asp:DropDownList? ID ="dropCategory" ?Runat ="server" ></ asp:DropDownList ></ td >
???????????????????????????? </ tr >
???????????????????????????? < tr >
???????????????????????????????? < td? align ="left" >< asp:DropDownList? ID ="dropTime" ?Runat ="server" >
???????????????????????????????????????? < asp:ListItem? Value ="0" > 發布時間 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="1" > 1天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="2" > 2天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="3" > 3天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="4" > 4天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="5" > 5天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="10" > 10天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="20" > 20天內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="30" > 一個月內 </ asp:ListItem >
???????????????????????????????????????? < asp:ListItem? Value ="90" > 三個月內 </ asp:ListItem >
???????????????????????????????????? </ asp:DropDownList ></ td >
???????????????????????????? </ tr >
???????????????????????????? < tr >
???????????????????????????????? < td? align ="left" >< asp:DropDownList? ID ="dropProvince" ?Runat ="server" ></ asp:DropDownList >
???????????????????????????????????? < asp:DropDownList? ID ="dropCity" ?Runat ="server" ></ asp:DropDownList ></ td >
???????????????????????????? </ tr >
???????????????????????????? < tr >
???????????????????????????????? < td? align ="left" >< asp:Button? ID ="btnSearch" ?Runat ="server" ?Text ="搜?索" ></ asp:Button >< INPUT? id ="hidprovince" ?style ="WIDTH:?31px;?HEIGHT:?22px" ?type ="hidden" ?size ="1" ?name ="hidprovince"
????????????????????????????????????????runat ="server" >< INPUT? id ="hidcity" ?style ="WIDTH:?34px;?HEIGHT:?22px" ?type ="hidden" ?size ="1" ?name ="hidprovince"
????????????????????????????????????????runat ="server" ></ td >
???????????????????????????? </ tr >
???????????????????????? </ table >
???????????????????? </ td >
???????????????????? < td? background ="/yizhi/images/chaxun_07.gif" ?width ="16" ></ td >
???????????????? </ tr >
???????????????? < tr >
???????????????????? < td >
???????????????????????? < img? src ="/yizhi/images/chaxun_08.gif" ?width ="15" ?height ="8" ?alt ="" ></ td >
???????????????????? < td >
???????????????????????? < img? src ="/yizhi/images/chaxun_09.gif" ?width ="185" ?height ="8" ?alt ="" ></ td >
???????????????????? < td >
???????????????????????? < img? src ="/yizhi/images/chaxun_10.gif" ?width ="16" ?height ="8" ?alt ="" ></ td >
???????????????? </ tr >
???????????????? < tr >
???????????????????? < td? colspan ="3" >
???????????????????????? < img? src ="/yizhi/images/chaxun_11.gif" ?width ="216" ?height ="14" ?alt ="" ></ td >
???????????????? </ tr >
???????????????? < tr >
???????????????????? < td > &nbsp; </ td >
???????????????? </ tr >
???????????? </ table >
???????? </ td >
???? </ tr >
</ table >

2. cs 代碼
namespace ?ProductControls
{
???? using ?System;
???? using ?System.Data;
???? using ?System.Drawing;
???? using ?System.Web;
???? using ?System.Web.UI.WebControls;
???? using ?System.Web.UI.HtmlControls;

???? /// ? <summary>
???? /// Search?的摘要說明。
???? /// ? </summary>
???? public ? class ?Search?:?System.Web.UI.UserControl
???? {
???????? protected ?System.Web.UI.WebControls.TextBox?txtName;
???????? protected ?System.Web.UI.WebControls.DropDownList?dropCategory;
???????? protected ?System.Web.UI.WebControls.DropDownList?dropTime;
???????? protected ?System.Web.UI.WebControls.DropDownList?dropProvince;
???????? protected ?System.Web.UI.WebControls.DropDownList?dropCity;
???????? protected ?System.Web.UI.WebControls.Button?btnSearch;
???????? protected ?System.Web.UI.HtmlControls.HtmlInputHidden?hidprovince;
???????? protected ?System.Web.UI.HtmlControls.HtmlInputHidden?hidcity;
????????YzBLL.Members?m = new ?YzBLL.Members();
???????? public ? string ?CategoryName
???????? {
???????????? get
???????????? {
???????????????? string ?Name? = ? this .txtName.Text.Trim();
???????????????? if ?(?Name? == ? " 請輸入關鍵字 " ?)
????????????????????Name? = ? "" ;
???????????????? return ?Name;
????????????}
???????????? set
???????????? {
????????????????
???????????????? this .txtName.Text? = ?value;
????????????}
????????}
???????? public ? string ?CategoryID
???????? {
???????????? get
???????????? {
???????????????? return ? this .dropCategory.SelectedValue;
????????????}
???????????? set
???????????? {
???????????????? this .dropCategory.SelectedValue? = ?value;
????????????}
????????}
???????? public ? string ?CreateTime
???????? {
???????????? get
???????????? {
???????????????? return ? this .dropTime.SelectedValue;
????????????}
???????????? set
???????????? {
???????????????? this .dropTime.SelectedValue? = ?value;
????????????}
????????}
???????? public ? string ?Area
???????? {
???????????? get
???????????? {
???????????????? string ?area? = ? " 不限 " ;
???????????????? if ?(? this .hidprovince.Value.Trim()? != ? " 省份 " ??)
???????????????? {
????????????????????area? = ? this .hidprovince.Value;
???????????????????? if ?(? this .hidcity.Value.Trim()? != ? " 城市 " ?)
????????????????????????area? = ?area? + " - " + this .hidcity.Value.Trim();
????????????????}
???????????????? else
????????????????????area? = ? "" ;
???????????????? return ?area;
????????????}
????????}
???????? private ? void ?Page_Load( object ?sender,?System.EventArgs?e)
???????? {
???????????? this .BindddlProvince();
???????????? if (father != "" )
???????????? {
???????????????? this .BindddlCity(Convert.ToInt32(father));
????????????}
???????????? else
???????????? {
????????????????dropCity.Items.Clear();
????????????????dropCity.Items.Add( new ?ListItem( " 城市 " , " 0 " ));
????????????}
???????????? // ?在此處放置用戶代碼以初始化頁面
???????????? if ?(? ! Page.IsPostBack?)
???????????? {
????????????????BindCategory();
????????????????BindddlProvince();
???????????????? this .dropProvince.Attributes.Add( " onchange " , " GetDataSetCity(this); " );
???????????????? this .btnSearch.Attributes.Add( " onclick " , " getData(); " );
????????????}
????????}
???????? private ? void ?BindCategory()
???????? {
????????????DataTable?dtCategory? = ? new ?DataTable();
????????????YzBLL.YzGqInfo?gq? = ? new ?YzBLL.YzGqInfo();
????????????dtCategory? = ?gq.GetCategory();
???????????? this .dropCategory.DataSource? = ?dtCategory;
???????????? this .dropCategory.DataTextField? = ? " CategoryName " ;
???????????? this .dropCategory.DataValueField? = ? " Categoryid " ;
???????????? this .dropCategory.DataBind();
???????????? this .dropCategory.Items.Insert( 0 , new ?ListItem( " 產品種類 " , " 0 " ));
????????}
???????? // 綁定ddlProvince
???????? public ? void ?BindddlProvince()
???????? {
????????????DataTable?dt = m.AllProvince();
???????????? this .dropProvince.DataSource = dt.DefaultView;
???????????? this .dropProvince.DataTextField = " province " ;
???????????? this .dropProvince.DataValueField = " provinceID " ;
???????????? this .dropProvince.DataBind();
???????????? this .dropProvince.Items.Insert( 0 , new ?ListItem( " 省份 " , " 0 " ));
????????}
???????? // 綁定BindddlCity
???????? public ? void ?BindddlCity( int ?father)
???????? {
???????????? string ?mystr? = ? "" ;
　　????????DataTable?dt = m.AllCity(father);

　　???????? if (dt.Rows.Count? != ? 0 )
　　???????? {
??????????????mystr += " , " + " 0 " + " | " + " 城市 " ;
　　　　???????? for ( int ?i = 0 ;i < dt.Rows.Count;i ++ )
　　　　???????? {
　　　　　　????????mystr? += ? " , " ? + ?dt.Rows[i][ 1 ].ToString()? + ? " | " ? + ?dt.Rows[i][ 2 ].ToString();
　　　　????????}
　　　　????????mystr? = ?mystr.Substring( 1 );
　　????????}
　　???????? this .Response.Write(mystr);
　　???????? this .Response.End();
????????}

???????? private ? string ?father
???????? {
???????????? get
???????????? {
???????????????? if (ViewState[ " father " ] != null ? && ?ViewState[ " father " ].ToString() != "" )
???????????????? {
???????????????????? return ?ViewState[ " father " ].ToString();
????????????????}
???????????????? else
???????????????? {
???????????????????? if (Request[ " father " ] != null ? && ?Request[ " father " ].ToString() != "" )
???????????????????? {
???????????????????????? return ?Request[ " father " ];
????????????????????}
???????????????????? else
???????????????????? {
???????????????????????? return ? "" ;
????????????????????}
????????????????}
????????????}
???????????? set
???????????? {
????????????????ViewState[ " father " ] = value;
????????????}
????????}
???????? Web?窗體設計器生成的代碼

???????? public ? delegate ? void ?OnSearch( object ?sender,System.EventArgs?e);
???????? public ? event ?OnSearch?onSearch;
???????? private ? void ?btnSearch_Click( object ?sender,?System.EventArgs?e)
???????? {
???????????? if ?(?onSearch? != ? null ?)
???????????? {
????????????????onSearch(sender,e);
????????????}
????????}
????}
}

如何實現用戶自己定義控件。


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