数字文本控件
using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Collections;
using System.Collections.Specialized;
namespace PublicControls
{
///<summary>
/// DateTimeBox 的摘要说明。
///</summary>
public class IntTextBox : Control,IPostBackDataHandler
{
#region预定义
private int min;
private int max;
private Unit width;
private Unit height;
private int defaultnum;
///<summary>
///委托页面索引事件
///</summary>
public event EventHandler OnValueChanged;
#endregion
#region属性
///<summary>
///最小值
///</summary>
[Description("最小值")]
public int MinNum
{
get
{
if(this.IsNumeric(ViewState["MinNum"]))
{
min = (int)ViewState["MinNum"];
}
return min;
}
set
{
min = value;
ViewState["MinNum"] = min;
}
}
///<summary>
///最大值
///</summary>
[Description("最大值")]
public int MaxNum
{
get
{
if(this.IsNumeric(ViewState["MaxNum"]))
{
max = (int)ViewState["MaxNum"];
}
return max;
}
set
{
max = value;
ViewState["MaxNum"] = max;
}
}
///<summary>
///值
///</summary>
[Description("值")]
public int DefaultNum
{
get
{
if(this.IsNumeric(ViewState["DefaultNum"]))
{
defaultnum = (int)ViewState["DefaultNum"];
}
return defaultnum;
}
set
{
defaultnum=value;
ViewState["DefaultNum"] = defaultnum;
}
}
///<summary>
///宽度
///</summary>
[Description("宽度")]
public Unit Width
{
get
{
return width;
}
set
{
width = value;
}
}
///<summary>
///高度
///</summary>
[Description("高度")]
public Unit Height
{
get
{
return height;
}
set
{
height = value;
}
}
#endregion
#region事件或方法
///<summary>
///数据回送事件
///</summary>
///<param name="postDataKey"></param>
///<param name="values"></param>
///<returns></returns>
public bool LoadPostData(string postDataKey, NameValueCollection values)
{
if(!this.IsNumeric(values[this.UniqueID]))
{
return false;
}
if(DefaultNum != int.Parse(values[this.UniqueID]))
{
DefaultNum = int.Parse(values[this.UniqueID]);
if(DefaultNum>MaxNum)
{
DefaultNum = MaxNum;
}
if(DefaultNum<MinNum)
{
DefaultNum = MinNum;
}
return true;
}
return false;
}
///<summary>
///当由类实现时，用信号要求服务器控件对象通知 ASP.NET 应用程序该控件的状态已更改。
///</summary>
public void RaisePostDataChangedEvent()
{
ValueChanged();
}
///<summary>
///将事件委托给所调用的页面
///</summary>
public void ValueChanged()
{
if(OnValueChanged!=null)
{
OnValueChanged(this,System.EventArgs.Empty);
}
}
#endregion
#region输出
///<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)
{
string view;
view=ViewString(MinNum,MaxNum);
output.Write(view);
}
#endregion
#region其他函数或方法
///<summary>
///输出字符串组合
///</summary>
///<param name="min"></param>
///<param name="max"></param>
///<returns></returns>
string ViewString(int min,int max)
{
string view="";
view+="<script><!--/n";
view+="function changetext(direction)/n";
view+="{/n";
view+="if(direction=='up')/n";
view+="{/n";
view+="if(document.all."+this.UniqueID+".value<"+max+")/n";
view+="document.all."+this.UniqueID+".value=parseInt(document.all."+this.UniqueID+".value)+1;/n";
view+="}/n";
view+="else/n";
view+="{/n";
view+="if(document.all."+this.UniqueID+".value>"+min+")/n";
view+="document.all."+this.UniqueID+".value=parseInt(document.all."+this.UniqueID+".value)-1;/n";
view+="}/n";
view+="}/n";
view+="function keydown()/n";
view+="{/n";
view+="var KeyCode=event.keyCode;/n";
view+="if(((KeyCode>47)&&(KeyCode<58))||(KeyCode==8)||(KeyCode==46)||(KeyCode==37)||(KeyCode==39)||(KeyCode>95&&KeyCode<106))/n";
view+="{/n";
view+="return true;/n";
view+="}/n";
view+="else/n";
view+="{/n";
view+="return false;/n";
view+="}/n";
view+="}/n";
view+="function focusblur()/n";
view+="{/n";
view+="var num=document.all."+this.UniqueID+".value;/n";
view+="if(num>"+MaxNum+")/n";
view+="{/n";
view+="document.all."+this.UniqueID+".value="+MaxNum+";/n";
view+="}/n";
view+="if(num<"+MinNum+")/n";
view+="{/n";
view+="document.all."+this.UniqueID+".value="+MinNum+";/n";
view+="}/n";
view+="}/n";
view+="//--></script>";
view+="<div><span onclick=/"changetext('down')/" style=/"BORDER-RIGHT: black thin solid; BORDER-TOP: black thin solid; BORDER-LEFT: black thin solid; CURSOR: hand; BORDER-BOTTOM: black thin solid;">6</span><input type=text id=/""+this.UniqueID+"/" name=/""+this.UniqueID+"/" value=/""+this.DefaultNum+"/" style=/"width:"+this.Width+";height:"+this.Height+"/" onkeydown=/"return keydown()/" onblur=/"focusblur()/"><span onclick=/"changetext('up')/" style=/"BORDER-RIGHT: black thin solid; BORDER-TOP: black thin solid; BORDER-LEFT: black thin solid; CURSOR: hand; BORDER-BOTTOM: black thin solid;">5</span></div>";
return view;
}
///<summary>
///判断是否为数字字符串
///</summary>
///<param name="obj">需验证的字符串</param>
///<returns>判断结果，符合条件为True,不符合条件为False</returns>
public bool IsNumeric(object obj)
{
obj += "";
string str = obj.ToString();
//判断是否为空
if (str == null || str.Length==0)
{
return false;
}
//循环检查每个字符
foreach(char c in str)
{
if (!Char.IsNumber(c))
{
return false;
}
}
return true;
}
#endregion
}
}
