C# 里:
this.txtInput.Attributes.Add("onblur","aaa()")
js里:
function aaa()
{
if( isNaN(window.document.all('txtInput').value) )
{
window.alert("请确认您输入的是一个数值!");
}
}
this.txtInput.Attributes.Add("onblur","aaa()")
js里:
function aaa()
{
if( isNaN(window.document.all('txtInput').value) )
{
window.alert("请确认您输入的是一个数值!");
}
}
function CheckNum(obj)
{
if(isNaN(obj.value))
{
alert('只能输入数字。');
obj.value="0";
obj.focus();
obj.select();
return false;
}
else
{
return true;
}
</script><asp:TextBox OnBlur="CheckNum(this)" .....>添加对齐属性在
pageload 中
TextBox1.Style["Text-Algin"]="Center";
TextBox1.Attributes["onkeypress"] = "CheckInput()";
aspx中加上
<script language="javascript">
function CheckInput()
{
var k = window.event.keyCode;
if (k < 48 || k > 57)
window.event.keyCode = 0;
}
</script>
没问题的
[0-9-()]{0,}
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm1</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:TextBox id="TextBox1" style="Z-INDEX: 101; LEFT: 56px; POSITION: absolute; TOP: 40px" runat="server"></asp:TextBox>
<asp:Button id="Button1" style="Z-INDEX: 102; LEFT: 248px; POSITION: absolute; TOP: 40px" runat="server"
Text="Button"></asp:Button>
<asp:RegularExpressionValidator id="RegularExpressionValidator1" style="Z-INDEX: 103; LEFT: 328px; POSITION: absolute; TOP: 48px"
runat="server" ErrorMessage="RegularExpressionValidator" ValidationExpression="[0-9]*" ControlToValidate="TextBox1"></asp:RegularExpressionValidator></FONT>
</form>
</body>
</HTML>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;namespace WebApplication1
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.TextBox TextBox1;
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.RegularExpressionValidator RegularExpressionValidator1;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
} #region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load); }
#endregion
}
}
Form_Load中加上
TextBox1.Attributes.add("onkeypress") = "CheckInput()";
aspx中加上
<script language="javascript">
function CheckInput()
{
var k = window.event.keyCode;
if (k < 48 || k > 57)
window.event.keyCode = 0;
}
</script>
客户端:
使用正则表达式或者javascript
对齐使用style设置
服务器端:
try{
Convert.ToDecimal(textBox.Text);
}
catch{
...数字格式不对.
}