class1.cs

對c#初學者參考..為課題asp.net 2.0教材代碼

using System.ComponentModel;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace WebControlLibrary1
{
    [DefaultProperty("Text")]
    [ToolboxData("<{0}:WebCustomControl3 runat=server></{0}:WebCustomControl3>")]
    public class WebCustomControl3 : WebControl,
        IPostBackEventHandler, IPostBackDataHandler
    {
        private string text;

        [Bindable(true)]
        [Category("Appearance")]
        [DefaultValue("")]
        [Themeable(false)]
        public string Text
        {
            get
            {
                return text;
            }
            set
            {
                text = value;
            }
        }

        protected override void Render(HtmlTextWriter output)
        {
            PostBackOptions p = new PostBackOptions(this);

            output.AddAttribute(HtmlTextWriterAttribute.Onclick,
                Page.ClientScript.GetPostBackEventReference(p));
            output.AddAttribute(HtmlTextWriterAttribute.Value, "My Button");
            output.AddAttribute(HtmlTextWriterAttribute.Id, this.ClientID);
            output.AddAttribute(HtmlTextWriterAttribute.Name, this.ClientID);
            output.RenderBeginTag(HtmlTextWriterTag.Button);
            output.RenderEndTag();
        }

        #region IPostBackEventHandler Members
        public event EventHandler Click;

        public virtual void OnClick(EventArgs e)
        {
            if (Click != null)
            {
                Click(this, e);
            }
        }

        public void RaisePostBackEvent(string eventArgument)
        {
            OnClick(EventArgs.Empty);
        }

        #endregion

        public bool LoadPostData(string postDataKey,
            System.Collections.Specialized.NameValueCollection postCollection)
        {
            this.Text = postCollection[postDataKey];
            return false;
        }

        public void RaisePostDataChangedEvent()
        {
        }

    
    }
}