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

namespace PEONormalControl

...{

/**//// <summary>
/// 回传事件参数类型
/// </summary>
public class EventTextBoxEventArgs:EventArgs

...{
private string _ToAppend;
EventTextBoxEventArgs()

...{
}
public EventTextBoxEventArgs(String ArgText)

...{
this._ToAppend=ArgText;
}

/**//// <summary>
/// 回传事件参数
/// </summary>
public String ArgText

...{

get...{return _ToAppend;}

set...{_ToAppend =value;}
}
}

/**//// <summary>
/// 从TextBox继承,实现了IPostBackEventHandler接口
/// </summary>
[DefaultProperty("Text"),
ToolboxData("<{0}:EventTextBox runat=server></{0}:EventTextBox>")]
public class EventTextBox : System.Web.UI.WebControls.TextBox,IPostBackEventHandler

...{
//private string text;
private static readonly object objEventChangedKey;
public delegate void EventChangedHandler(object sender,EventTextBoxEventArgs e);

[Bindable(false),
Category("Appearance"),
DefaultValue("")]
public string PrefixText

...{
get

...{ if (ViewState["PrefixText"] == null)
return "";
else
return ViewState["PrefixText"].ToString() ;
}

set

...{
ViewState["PrefixText"] = value;
}
}

/**//// <summary>
/// 引起回传的事件名称
/// </summary>
[Bindable(false),
Category("Behavior"),
DefaultValue(""),Description("引起回传的事件名称")]
public string EventName

...{
get

...{ if (ViewState["EventName"] == null)
return "";
else
return ViewState["EventName"].ToString() ;
}

set

...{
ViewState["EventName"] = value;
}
}

/**//// <summary>
/// 回传事件参数
/// </summary>
[Bindable(false),
Category("Behavior"),
DefaultValue(""),Description("回传事件参数")]
public string EventArgText

...{
get

...{ if (ViewState["EventArgText"] == null)
return "";
else
return ViewState["EventArgText"].ToString() ;
}

set

...{
ViewState["EventArgText"] = value;
}
}

/**//// <summary>
/// 用户自定义的回传函数
/// </summary>
[Bindable(false),
Category("Behavior"),
DefaultValue(""),Description("用户自定义的回传函数,为空则使用标准的回传函数")]
public String UserPostBackFunction

...{
get

...{ if (ViewState["UserPostBackFunction"] == null)
return "";
else
return ViewState["UserPostBackFunction"].ToString() ;
}

set

...{
ViewState["UserPostBackFunction"] = value;
}
}
protected virtual void OnEventChanged(EventTextBoxEventArgs e)

...{
EventChangedHandler handler1 = (EventChangedHandler) base.Events[objEventChangedKey];
if (handler1 != null)

...{
handler1(this, e);
}
}
public void RemoveStateView(String strKey)

...{
this.ViewState.Remove(strKey);
}
[Description("EventTextBox_OnEventChanged"), Category("Action")]
public event EventChangedHandler EventChanged

...{
add

...{
base.Events.AddHandler(objEventChangedKey, value);
}
remove

...{
base.Events.RemoveHandler(objEventChangedKey, value);
}
}

/**//// <summary>
/// 将此控件呈现给指定的输出参数。
/// </summary>
/// <param name="output"> 要写出到的 HTML 编写器 </param>
protected override void Render(HtmlTextWriter output)

...{
EventChangedHandler handler1 = (EventChangedHandler) base.Events[objEventChangedKey];
if (handler1 != null && EventName != String.Empty)

...{
base.Attributes[EventName]=UserPostBackFunction==""? Page.GetPostBackClientEvent(this,EventArgText):UserPostBackFunction;
if(PrefixText != "" && !base.Text.StartsWith(PrefixText)) base.Text = PrefixText + base.Text;
}
base.Render(output);
}
//增加自己想渲染的属性
protected override void AddAttributesToRender(HtmlTextWriter writer)

...{
//writer.AddAttribute(HtmlTextWriterAttribute.Title,"PEOControl");
base.AddAttributesToRender (writer);
}


IPostBackEventHandler 成员#region IPostBackEventHandler 成员

public void RaisePostBackEvent(string eventArgument)

...{
// TODO: 添加RaisePostBackEvent 实现
EventTextBoxEventArgs e = new EventTextBoxEventArgs(eventArgument);
OnEventChanged(e);
}

#endregion
}
}























































































































































































































