自定义服务器控件,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：

using System;

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>")]

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)

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();

}

}

}

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

//自定义服务器控件

protected void btnSubmit() {

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。