ASP.NET自定义Web服务器控件之Button控件
本文实例讲述了ASP.NET自定义Web服务器控件之Button控件实现方法。分享给大家供大家参考。具体实现方法如下：
usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Web;
usingSystem.Web.UI;
usingSystem.Web.UI.WebControls;
//自定义web服务器button
namespaceMyControls
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:MyButtonrunat=server></{0}:MyButton>")]
publicclassMyButton:WebControl,IPostBackEventHandler
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
publicstringText
{
get
{
Strings=(String)ViewState["Text"];
return((s==null)?String.Empty:s);
}
set
{
ViewState["Text"]=value;
}
}
[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]//生成属性时，按属性内部内容生成(例如在此控件里面(Size-Height,Size_Width))
//[PersistenceMode(PersistenceMode.InnerProperty)]//以子标签的形式显示(例如<SizeWidth=""Height=""/>)
publicSizeSize
{
get
{
if(ViewState["Size"]==null){
ViewState["Size"]=newSize();
}
return(Size)ViewState["Size"];
}
set
{
ViewState["Size"]=value;
}
}
//定义控件的标签形式
protectedoverrideHtmlTextWriterTagTagKey
{
get
{
returnHtmlTextWriterTag.Input;
}
}
//初始化
protectedoverridevoidOnInit(EventArgse)
{
this.Style.Add("width",Size.Width+"px");
this.Style.Add("height",Size.Height+"px");
this.Attributes.Add("type","submit");//提交按钮
this.Attributes.Add("value",Text);
this.Attributes.Add("name",this.UniqueID);//回发事件必须有的一个属性
base.OnInit(e);
}
//打印当前控件的内容
protectedoverridevoidRenderContents(HtmlTextWriteroutput)
{
//output.Write(Text);
}
publicdelegatevoidClickHandle();
privateobjectkey=newobject();
publiceventClickHandleClick{
add{
this.Events.AddHandler(key,value);
}
remove{
this.Events.RemoveHandler(key,value);
}
}
//按钮的回发事件
publicvoidRaisePostBackEvent(stringeventArgument)
{
ClickHandlehandle=(ClickHandle)base.Events[key];
if(handle!=null){
handle();
}
}
}
}
<%@PageLanguage="C#"AutoEventWireup="true"CodeFile="Default.aspx.cs"Inherits="_Default"%>
<%@Registerassembly="MyControls"namespace="MyControls"tagprefix="cc1"%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<headrunat="server">
<title></title>
</head>
<body>
<formid="form1"runat="server">
<div>
<!--自定义服务器按钮控件-->
<cc1:MyButtonID="MyButton1"Size-Height="30"Size-Width="290"OnClick="btnSubmit"Text="我是一个单独的提交按钮(自定义服务器)"runat="server"/>
</div>
</form>
</body>
</html>
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Web;
usingSystem.Web.UI;
usingSystem.Web.UI.WebControls;
publicpartialclass_Default:System.Web.UI.Page
{
protectedvoidPage_Load(objectsender,EventArgse)
{
}
//自定义服务器控件
protectedvoidbtnSubmit(){
Response.Write("我是自定义服务器控件的点击事件");
}
}
希望本文所述对大家的asp.net程序设计有所帮助。