ASP.NET自定义控件开发设计界面，设计时界面与运行时界面不同
设计类:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
namespace ServerControl2
{
public class Des:System.Web.UI.Design.ControlDesigner
{
public override string GetDesignTimeHtml()
{
StringWriter sw = new StringWriter();
HtmlTextWriter tw = new HtmlTextWriter(sw);
HyperLink hl = new HyperLink();
hl.Text = "Hello, Control";
hl.NavigateUrl = "http://www.microsoft.com/china/msdn";
hl.RenderControl(tw);
tw.Write(HtmlTextWriter.SpaceChar);
Label lbl = new Label();
lbl.BackColor = System.Drawing.Color.LemonChiffon;
lbl.Text = hl.NavigateUrl;
lbl.RenderControl(tw);
return sw.ToString();
}
}
}
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;
namespace ServerControl2
{
[Designer("ServerControl2.Des,ServerControl2"),DefaultProperty("Text")]
[ToolboxData("<{0}:ServerControl1 runat=server></{0}:ServerControl1>")]
public class ServerControl1 : WebControl,IPostBackEventHandler
{
[Bindable(true)]
[Category("Appearance")]
[DefaultValue("")]
[Localizable(true)]
public string Text
{
get
{
String s = (String)ViewState["Text"];
return "自定义控件aa";
}
set
{
ViewState["Text"] = value;
}
}
public int Speed
{
get;
set;
}
protected override void RenderContents(HtmlTextWriter output)
{
output.Write(Text);
output.Write(string.Format(@" <marquee width=400 scrollamount='{0}' behavior=alternate direction=left align=middle>弹来弹去跑马灯!</marquee>",Speed));
}
protected override void OnPreRender(EventArgs e)
{
}
protected override void AddAttributesToRender(HtmlTextWriter writer)
{
writer.AddAttribute(HtmlTextWriterAttribute.Onclick,"Javascript:"+Page.GetPostBackEventReference(this));
writer.AddStyleAttribute(HtmlTextWriterStyle.BackgroundColor, "red");
base.AddAttributesToRender(writer);
}
public event EventHandler click;
public void RaisePostBackEvent(string eventArgument)
{
Onclick(EventArgs.Empty);
}
protected virtual void Onclick(EventArgs ex)
{
if (click!=null)
{
click(this,ex);
}
// HttpContext.Current.Response.Redirect("http://www.baidu.com");
}
}
}