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：
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
//自定义web服务器button
namespace MyControls
{
[DefaultProperty("Text")]
[ToolboxData("<{0}:MyButton runat=server></{0}:MyButton>")]
public class MyButton : WebControl,IPostBackEventHandler
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text
{
get
{
String s = (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<Size Width="" Height=""/>)
public Size Size
{
get
{
if (ViewState["Size"] == null) {
ViewState["Size"] = new Size();
}
return (Size)ViewState["Size"];
}
set
{
ViewState["Size"] = value;
}
}
//定义控件的标签形式
protected override HtmlTextWriterTag TagKey
{
get
{
return HtmlTextWriterTag.Input;
}
}
//初始化
protected override void OnInit(EventArgs e)
{
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
protected override void RenderContents(HtmlTextWriter output)
{
//output.Write(Text);
}
public delegate void ClickHandle();
private object key=new object();
public event ClickHandle Click {
add {
this.Events.AddHandler(key,value);
}
remove {
this.Events.RemoveHandler(key, value);
}
}
//按钮的回发事件
public void RaisePostBackEvent(string eventArgument)
{
ClickHandle handle = (ClickHandle)base.Events[key];
if (handle != null) {
handle();