var c = String.fromCharCode(event.keyCode); var keyCodeAry = new Array(96,97,98,99,100,101,102,103,104,105) var keyCode = event.keyCode; var specialKeyAry = new Array(13,27,8,46,35,36,37,38,39,40); if (itemInAry(specialKeyAry,keyCode)) return true;
var text= event.srcElement.value;
if(document.selection.createRange().text==text && event.keyCode !=9) { event.srcElement.value =""; text =""; event.srcElement.focus(); } //get text cursor position var obj = window.event.srcElement; var s=document.selection.createRange(); s.setEndPoint("StartToStart",obj.createTextRange()) var pos = s.text.length;
<asp:TextBox onkeydown ="javascript:reuturn CheckInputNumber(10,2,true);" function CheckInputNumber(iLength,iDeciLength,iAllowZeroCapital)
{
event.cancelBubble =true;
/*if(event.keyCode ==13)
{ event.keyCode =9;
return
}*/
var sClipBoardText = window.clipboardData.getData("Text");
if (sClipBoardText==null )
sClipBoardText ="";
if(event.ctrlKey )
{
if(event.keyCode == 67 ||event.keyCode ==99||event.keyCode ==10 || event.keyCode ==13) // Ctrl + C
{
return true;
}
if(!isNaN(sClipBoardText) && sClipBoardText.length<=iLength)
{
return true;
}
return false;
}
if (iDeciLength>0 && iLength<3 ) return false;
if(event.keyCode == 9 ) return true;
var c = String.fromCharCode(event.keyCode);
var keyCodeAry = new Array(96,97,98,99,100,101,102,103,104,105)
var keyCode = event.keyCode;
var specialKeyAry = new Array(13,27,8,46,35,36,37,38,39,40);
if (itemInAry(specialKeyAry,keyCode)) return true;
var text= event.srcElement.value;
if(document.selection.createRange().text==text && event.keyCode !=9)
{
event.srcElement.value ="";
text ="";
event.srcElement.focus();
}
//get text cursor position
var obj = window.event.srcElement;
var s=document.selection.createRange();
s.setEndPoint("StartToStart",obj.createTextRange())
var pos = s.text.length;
if((isNaN(c)||keyCode==32 ||event.shiftKey) && !itemInAry(keyCodeAry,keyCode))
{
if ( text.indexOf(".",0)==-1 &&(iLength>0) && (keyCode ==110||(keyCode==190 && !event.shiftKey)) )
{
if(pos == text.length && (iLength-text.length)<2 && document.selection.createRange().text!=text)
{
return false;
}else{}
}else
return false;
if (iDeciLength==0) return false;
}
if(text.length==iLength && !(document.selection.createRange().text==text) ) return false; //max length and not hightlight
if(pos ==0 && (keyCode==110||(keyCode==190 && !event.shiftKey)) && text.length<iLength-1)
{
obj.value = "0.";
return false;;
}
if(pos ==0 && iDeciLength>0 && text=="" && (c=="0"||keyCode==96))
{
obj.value ="0.";
return false;
}
if( (c=="0"||keyCode==96) && iDeciLength<=0 &&pos==0 && iAllowZeroCapital!=1)
{
return false;
}
var zeroPos = text.indexOf(".");
if(zeroPos>0 && pos > zeroPos)
{
if (text.length-zeroPos-1 ==iDeciLength) return false;
}
//alert(pos.length);
return true;
}
http://chs.gotdotnet.com/quickstart/aspplus/doc/webvalidation.aspx
try
{
int i = int.Parse(TextBox.text);
}
catch
{
//如果不是数字...
}
另一种是采用容错:try{}catch{}来处理
/// <summary>
/// 名称:IsNumberic
/// 功能:判断输入的是否是数字
/// 参数:string oText:源文本
/// 返回值: bool true:是 false:否
/// </summary>
public bool IsNumberic(string oText)
{
try
{
int var1=Convert.ToInt32 (oText);
return true;
}
catch
{
return false;
}
}
{
if(char.isnumber(TextBox1.text[i])!=true)
{
Label1.text="您输入的不完全是数字";
}
else
{
Label1.text="您输入的完全是数字";
}
在TextBox1的Onchange事件里写
for(int i=0;i<TextBox1.text.length;i++)
{
if(char.isnumber(TextBox1.text[i])!=true)
{
Response.Write("<script>alert('请您输入数字');</script>");
break;
}
}