怎样封装控件
1.WebResource
获取一个字符串，该字符串包含由 WebResourceAttribute 类所引用的资源的名称。
[assembly: WebResource(
"
Aerolite.Resources.Js.SearchTextBox.js
"
,
"
application/x-javascript
"
)][assembly: WebResource(
"
Aerolite.Resources.Js.MenuCommon.js
"
,
"
application/x-javascript
"
)]
2.TagPrefix
定义在网页中用于标识自定义控件的标记前缀。
[assembly: TagPrefix(
"
Aerolite.Web.WebControls
"
,
"
arl
"
)]
3.ToolboxData
指定当从MS等工具的工具箱拖动自定义控件时为它生成的默认标记
[ToolboxData(
"
<{0}:SearchTextBox runat=server />
"
)]
4.ParseChildren
定义可在开发asp.net服务器控件时使用的元数据属性
[ParseChildren(
true
)]
5.Bindable
指示成员是否用于绑定
6.Themeable
获取一个值，该值指示当前控件或控件的成员是否受 Web 应用程序中定义的主题和控件外观影响。
7.Browsable
获取一个值，该值指示此对象是否可浏览。是否显示在“属性”窗口中。
[Bindable(
true
), Themeable(
false
), Browsable(
true
)]
8.Category
指定当属性或者事件显示在一个设置为"按分类顺序"模式的System.Windows.Forms.PropertyGrid控件中时,用于给属性或事件分组的类别的名称。
9.DefaultValue
属性的默认值
10.Localizable
属性是否应本地化.
[Category(
"
Data
"
)] [DefaultValue(
"
App_Code
"
)] [Localizable(
true
)]
上面是一些属性的设置，下面附封装google suggest控件的代码。
using
System;
using
System.Collections.Generic;
using
System.ComponentModel;
using
System.Text;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.IO;
//
引用两个js文件,该js文件是生成该控件的
[assembly: WebResource(
"
Aerolite.Resources.Js.SearchTextBox.js
"
,
"
application/x-javascript
"
)][assembly: WebResource(
"
Aerolite.Resources.Js.MenuCommon.js
"
,
"
application/x-javascript
"
)]
//
定义在网页中的标记前缀为arl
[assembly: TagPrefix(
"
Aerolite.Web.WebControls
"
,
"
arl
"
)]
namespace
Aerolite.Web.WebControls
{
/// 
/// 一个可以异步传输已进行右模糊搜索的文本输入框
/// // 指定当从工具箱拖动时为它生成的默认标记 [ToolboxData( "<{0}:SearchTextBox runat=server />" )] //定义开发服务器控件时使用的元数据属性 [ParseChildren( true )] //定义一个属性 [PersistChildren( false )] public class SearchTextBox : System.Web.UI.WebControls.TextBox, System.Web.UI.ICallbackEventHandler { /// /// 获取或设置提供搜索结果的类的全名 /// [Bindable( true ), Themeable( false ), Browsable( true )] [Category( "Data" )] [DefaultValue( "" )] [Localizable( true )] public string DataSourceFullName { get { return (ViewState["DataSourceFullName"] == null) ? "" : (string) ViewState["DataSourceFullName"]; } set { ViewState["DataSourceFullName"] = value; } } /// /// 获取或设置提供搜索结果的类所在程序集的名称 /// [Bindable( true ), Themeable( false ), Browsable( true )] [Category( "Data" )] [DefaultValue( "App_Code" )] [Localizable( true )] public string DataSourceAssembly { get { return (ViewState["DataSourceAssembly"] == null) ? "App_Code" : (string) ViewState["DataSourceAssembly"]; } set { ViewState["DataSourceAssembly"] = value; } } /// /// 获取或设置提供搜索结果的方法的名称。 /// [Bindable( true ), Themeable( false ), Browsable( true )] [Category( "Data" )] [DefaultValue( "" )] [Localizable( true )] public string GetDataMethod { get { return (ViewState["GetDataMethod"] == null) ? "" : (string) ViewState["GetDataMethod"]; } set { ViewState["GetDataMethod"] = value; } } private object _DataSource; [Bindable( true ), Themeable( false ), Browsable( false )] public object DataSource { get { if ( _DataSource == null ) { OnDataSourceCreating(); } return _DataSource; } set { _DataSource = value; Properties.Resources; } } public delegate void DataSoucreEventHandler( SearchTextBox sender ); [Bindable( false ), Browsable( false )] public event DataSoucreEventHandler DataSourceCreating; protected virtual void OnDataSourceCreating() { if ( DataSourceCreating != null ) { DataSourceCreating( this ); } else { _DataSource = System.Type.GetType( DataSourceFullName + "," + DataSourceAssembly ).InvokeMember( "", System.Reflection.BindingFlags.CreateInstance, null, null, null ); } } /// /// 定义用于获取搜索上下文菜单项的方法 /// /// /// public delegate string[] GetSearchResultMethod( string searchKey ); private GetSearchResultMethod _getResult; /// /// 设置用于获取搜索上下文菜单项的方法 /// [Bindable( false ), Themeable( false ), Browsable( false )] public GetSearchResultMethod GetResultMethod { set { if ( value == null ) throw new ArgumentNullException( "value" ); _getResult = value; } } private string[] _GetResult( string searchKey ) { if ( _getResult == null ) return GetResult( searchKey ); else return _getResult( searchKey ); } /// /// 获取搜索上下文菜单项 /// /// /// protected virtual string[] GetResult( string searchKey ) { return FormatResult( DataSource.GetType().InvokeMember( GetDataMethod, System.Reflection.BindingFlags.InvokeMethod, null, DataSource, new object[] { searchKey } ) ).Split( ',' ); } protected override void OnPreRender( EventArgs e ) { base.OnPreRender( e ); Page.ClientScript.RegisterClientScriptResource( typeof( SearchTextBox ), "Aerolite.Resources.Js.MenuCommon.js" ); Page.ClientScript.RegisterClientScriptResource( typeof( SearchTextBox ), "Aerolite.Resources.Js.SearchTextBox.js" ); } protected override void Render( HtmlTextWriter writer ) { base.Render( writer ); writer.Write( " writer.Write( " var " + this.ClientID + "Menu=new searchTextBox();/n" ); writer.Write( " " + this.ClientID + "Menu.parentObj=document.getElementById(/"" + this.ClientID + "/");/n" ); writer.Write( " " + this.ClientID + "Menu.bindingEvent();/n" ); writer.Write( " " + this.ClientID + "Menu.callBack=function(){/n" + Page.ClientScript.GetCallbackEventReference( this, "this.parentObj.value", "this.getCallBackResult", null ) + ";/n};/n" ); writer.Write( @"" ); } protected virtual string FormatResult( object result ) { string temp = ""; if ( result is string ) { return result.ToString(); } else if ( result is System.Collections.IEnumerable ) { foreach ( object i in (System.Collections.IEnumerable) result ) { temp += "," + i.ToString(); } if ( temp != "" ) temp = temp.Substring( 1 ); } else if ( result is System.Data.DataTable ) { foreach ( System.Data.DataRow i in ((System.Data.DataTable) result).Rows ) { temp += "," + i[0].ToString(); } if ( temp != "" ) temp = temp.Substring( 1 ); } return temp; } //异步回调
ICallbackEventHandler 成员 }
}
来自 http://www.cnblogs.com/ustbwuyi/archive/2006/08/14/476671.html