如果只允许文本框中的数字，如果尝试输入字母表应该在webform中显示消息。 C＃ASP.NET [英] How to allow only numbers in textbox, if trying to enter alphabets should display messge in webform. C# ASP.NET
本文介绍了如果只允许文本框中的数字，如果尝试输入字母表应该在webform中显示消息。 C＃ASP.NET的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我想只允许数字以外的文本框中的数字接受，我的意思是不应该允许输入，需要显示messege。
<％@ Page Title =Language =C＃MasterPageFile =〜/ Expense.MasterAutoEventWireup =trueCodeBehind =Register.aspx.csInherits =Expense_System.Register％>
< asp：Content ID =Content1ContentPlaceHolderID =headrunat =server>
< style type =text / css>
.auto-style1 {
宽度：39％;
}
.auto-style2 {
text-align：right;
宽度：138px;
}
.auto-style3 {
text-align：left;
宽度：143px;
}
.auto-style4 {
text-align：right;
宽度：138px;
身高：30px;
}
.auto-style5 {
text-align：left;
身高：30px;
宽度：143px;
}
.auto-style7 {
text-align：right;
宽度：138px;
身高：29px;
}
.auto-style8 {
text-align：left;
身高：29px;
宽度：143px;
}
.auto-style10 {
text-align：right;
宽度：138px;
身高：27px;
}
.auto-style11 {
text-align：left;
身高：27px;
宽度：143px;
}
.auto-style13 {
text-align：right;
宽度：138px;
身高：28px;
}
.auto-style14 {
text-align：left;
身高：28px;
宽度：143px;
}
.auto-style16 {
text-align：left;
身高：27px;
宽度：165px;
margin-left：80px;
}
.auto-style17 {
text-align：left;
宽度：165px;
}
.auto-style18 {
text-align：left;
身高：29px;
宽度：165px;
}
.auto-style19 {
text-align：left;
身高：28px;
宽度：165px;
}
.auto-style20 {
text-align：left;
身高：30px;
宽度：165px;
}
< / style>
< / asp：Content>
< asp：Content ID =Content2ContentPlaceHolderID =ContentPlaceHolder1runat =server>
< asp：菜单ID =Menu1runat =serverBackColor =＃FFFBD6DynamicHorizontalOffset =2字体名称=Verdana字体大小= 0.8emForeColor =＃990000Orientation =HorizontalRenderingMode =TableStaticSubMenuIndent =10pxstyle =font-weight：700; color：#FFFFFF; background-color：＃99CCFF; font-size：xx -large; text-align：center;宽度=99％高度=67px>
< DynamicHoverStyle BackColor =＃990000ForeColor =White/>
< DynamicMenuItemStyle HorizontalPadding =5pxVerticalPadding =2px/>
< DynamicMenuStyle BackColor =＃FFFBD6/>
< DynamicSelectedStyle BackColor =＃FFCC66/>
< Items>
<％ - < asp：MenuItem NavigateUrl =〜/ HomePage.aspxText =Home PageValue =Home Page>< / asp：MenuItem> - ％>
< asp：MenuItem NavigateUrl =〜/ Loginpage.aspxText =LoginValue =Login>< / asp：MenuItem>
< / Items>
< StaticHoverStyle BackColor =＃990000ForeColor =White/>
< StaticMenuItemStyle HorizontalPadding =5pxVerticalPadding =2px/>
< StaticSelectedStyle BackColor =＃FFCC66/>
< / asp：菜单>
< h1>填写以下详细信息以注册< / h1>
< table class =auto-style1border =1>
< tr>
< td class =auto-style10>全名：< / td>
< td class =auto-style16>
< asp：TextBox ID =tbfullnamerunat =serverWidth =160px>< / asp：TextBox>
< / td>
< td class =auto-style11>
< asp：RequiredFieldValidator ID =RequiredFieldValidatorNamerunat =servercontroltovalidate =tbfullnameErrorMessage =名称是必需的ForeColor =Red>< / asp：RequiredFieldValidator>
< / td>
< / tr>
< tr>
< td class =auto-style2>电子邮件ID：< / td>
< td class =auto-style17>
< asp：TextBox ID =tbemailrunat =serverTextMode =EmailWidth =160px>< / asp：TextBox>
< / td>
< td class =auto-style3>
< asp：RequiredFieldValidator ID =RequiredFieldValidatormailrunat =serverControlToValidate =tbemailErrorMessage =需要电子邮件ForeColor =Red>< / asp：RequiredFieldValidator>
< asp：RegularExpressionValidator ID =RegularExpressionValidatormailrunat =serverControlToValidate =tbemailErrorMessage =无效的电子邮件ValidationExpression =\ w +（[ - +。'] \ w +）* @ \\ \\ w +（[ - 。] \ w +）* \.\\\ +（[ - 。] \ w +）*ForeColor =Red>< / asp：RegularExpressionValidator>
< / td>
< / tr>
< tr>
< td class =auto-style7>电话号码：< / td>
< td class =auto-style18>
< asp：TextBox ID =tbphonenorunat =serverTextMode =PhoneWidth =160pxOnTextChanged =tbphoneno_TextChanged>< / asp：TextBox>
< / td>
< td class =auto-style8>
< asp：RegularExpressionValidator ID =RegularExpressionValidatorphonenorunat =serverControlToValidate =tbphonenoErrorMessage =电话号码无效ValidationExpression =[0-9] {10}ForeColor =Red> ;< / ASP：的RegularExpressionValidator>
< asp：RequiredFieldValidator ID =RequiredFieldValidatorphonenorunat =serverControlToValidate =tbphonenoErrorMessage =电话号码是必需的ForeColor =Red>< / asp：RequiredFieldValidator>
< / td>
< / tr>
< tr>
< td class =auto-style13>出生日期：< / td>
< td class =auto-style19>
< asp：TextBox ID =tbdobrunat =serverTextMode =DateWidth =160px>< / asp：TextBox>
< / td>
< td class =auto-style14>
< asp：RequiredFieldValidator ID =RequiredFieldValidatordobrunat =serverControlToValidate =tbdobErrorMessage =出生日期是必需的ForeColor =Red>< / asp：RequiredFieldValidator>
< / td>
< / tr>
< tr>
< td class =auto-style2>登录ID：< / td>
< td class =auto-style17>
< asp：TextBox ID =tbloginidrunat =serverWidth =160px>< / asp：TextBox>
< / td>
< td class =auto-style3>
< asp：RequiredFieldValidator ID =RequiredFieldValidatorloginidrunat =serverControlToValidate =tbloginidErrorMessage =登录ID是必需的ForeColor =Red>< / asp：RequiredFieldValidator>
< / td>
< / tr>
< tr>
< td class =auto-style4>密码：< / td>
< td class =auto-style20>
< asp：TextBox ID =tbpwdrunat =serverTextMode =PasswordWidth =160px>< / asp：TextBox>
< / td>
< td class =auto-style5>
< asp：RequiredFieldValidator ID =RequiredFieldValidatorpwdrunat =serverControlToValidate =tbpwdErrorMessage =password is RequiredForeColor =Red>< / asp：RequiredFieldValidator>
< / td>
< / tr>
< tr>
< td class =auto-style4>确认密码：< / td>
< td class =auto-style20>
< asp：TextBox ID =tbconfirmpwdrunat =serverTextMode =PasswordWidth =160px>< / asp：TextBox>
< / td>
< td class =auto-style5>
< asp：RequiredFieldValidator ID =RequiredFieldValidatorconpwdrunat =serverControlToValidate =tbpwdErrorMessage =密码是必需的ForeColor =Red>< / asp：RequiredFieldValidator>
< / td>
< / tr>
< tr>
< td class =auto-style4> < / td>
< td class =auto-style20>
< asp：Button ID =btnRegsubmitrunat =serverText =SignUpOnClick =btnRegsubmit_Click/>
< input id =RegResettype =resetvalue =Reset/>< / td>
< td class =auto-style5>
< / td>
< / tr>
< / table>
< / asp：Content>
<$ p $使用系统;
使用System.Collections.Generic;
使用System.Linq;
使用System.Web;
使用System.Web.UI;
使用System.Web.UI.WebControls;
使用System.Data.SqlClient;
使用System.Configuration;
使用System.Data;
使用System.Text.RegularExpressions;
命名空间Expense_System
{
公共部分类注册：System.Web.UI.Page
{
protected void Page_Load（object sender ，EventArgs e）
{
}
protected void btnRegsubmit_Click（object sender，EventArgs e）
{
String strConnString = ConfigurationManager.ConnectionStrings [conString]。ConnectionString;
SqlConnection con = new SqlConnection（strConnString）;
con.Open（）;
SqlCommand cmd = new SqlCommand（）;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText =[dbo]。[SpCreateUser];
cmd.Parameters.Add（@ Full_name，SqlDbType.VarChar）.Value = tbfullname.Text;
cmd.Parameters.Add（@ Dob，SqlDbType.Date）.Value = tbdob.Text;
cmd.Parameters.Add（@ email，SqlDbType.VarChar）.Value = tbemail.Text;
cmd.Parameters.Add（@ phoneno，SqlDbType.Int）.Value = tbphoneno.Text;
cmd.Parameters.Add（@ loginid，SqlDbType.VarChar）.Value = tbloginid.Text;
cmd.Parameters.Add（@ pwd，SqlDbType.VarChar）.Value = tbpwd.Text;
cmd.Connection = con;
int totalrecordscreated =（int）cmd.ExecuteNonQuery（）;
Response.Write（No of created records+ totalrecordscreated.ToString（））;
con.Close（）;
}
protected void tbphoneno_TextChanged（object sender，EventArgs e）
{
if（ ！Regex.IsMatch（tbphoneno.Text，
@（^（[0-9] * | \d * \d {1}？\d *）$）））
{
}
其他
{
}
}
}
}
我的尝试：
protected void tbphoneno_TextChanged（object sender，EventArgs e）
{
if（！Regex.IsMatch（tbphoneno.Text，$ b $） b @（^（[0-9] * | \d * \d {1}？\d *）$）））
{
}
$
{
}
这是正确的吗？但是没有验证。
解决方案
）））
{
}
else
{
}
}
}
}
我尝试过：
protected void tbphoneno_TextChanged（对象发送者，EventArgs e）
{
if（！Regex.IsMatch（tbphoneno.Text，
@（^（[0-9] * | \d * \d { 1}？\d *）
）））
{
}
else
{
}
这是正确的吗？但没有验证。
< blockquote>基本上，不要在C＃中执行 - 只在服务器上运行，这意味着每次用户按下一个键时，都需要回发到服务器以进行验证。这是缓慢而低效的 - 执行此操作在va的客户端lidation全部是本地的：仅限javascript数字输入字段 - Google搜索 [ ^ ]
i want to allow only numbers in textbox other than number should accept, i mean should not allow to type, messege need to be displayed.
<%@ Page Title="" Language="C#" MasterPageFile="~/Expense.Master" AutoEventWireup="true" CodeBehind="Register.aspx.cs" Inherits="Expense_System.Register" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
<style type="text/css">
.auto-style1 {
width: 39%;
}
.auto-style2 {
text-align: right;
width: 138px;
}
.auto-style3 {
text-align: left;
width: 143px;
}
.auto-style4 {
text-align: right;
width: 138px;
height: 30px;
}
.auto-style5 {
text-align: left;
height: 30px;
width: 143px;
}
.auto-style7 {
text-align: right;
width: 138px;
height: 29px;
}
.auto-style8 {
text-align: left;
height: 29px;
width: 143px;
}
.auto-style10 {
text-align: right;
width: 138px;
height: 27px;
}
.auto-style11 {
text-align: left;
height: 27px;
width: 143px;
}
.auto-style13 {
text-align: right;
width: 138px;
height: 28px;
}
.auto-style14 {
text-align: left;
height: 28px;
width: 143px;
}
.auto-style16 {
text-align: left;
height: 27px;
width: 165px;
margin-left: 80px;
}
.auto-style17 {
text-align: left;
width: 165px;
}
.auto-style18 {
text-align: left;
height: 29px;
width: 165px;
}
.auto-style19 {
text-align: left;
height: 28px;
width: 165px;
}
.auto-style20 {
text-align: left;
height: 30px;
width: 165px;
}
</style>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<asp:Menu ID="Menu1" runat="server" BackColor="#FFFBD6" DynamicHorizontalOffset="2" Font-Names="Verdana" Font-Size="0.8em" ForeColor="#990000" Orientation="Horizontal" RenderingMode="Table" StaticSubMenuIndent="10px" style="font-weight: 700; color: #FFFFFF; background-color: #99CCFF; font-size: xx-large; text-align: center;" Width="99%" Height="67px">
<DynamicHoverStyle BackColor="#990000" ForeColor="White" />
<DynamicMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
<DynamicMenuStyle BackColor="#FFFBD6" />
<DynamicSelectedStyle BackColor="#FFCC66" />
<Items>
<%-- <asp:MenuItem NavigateUrl="~/HomePage.aspx" Text="Home Page" Value="Home Page"></asp:MenuItem>--%>
<asp:MenuItem NavigateUrl="~/Loginpage.aspx" Text="Login" Value="Login"></asp:MenuItem>
</Items>
<StaticHoverStyle BackColor="#990000" ForeColor="White" />
<StaticMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
<StaticSelectedStyle BackColor="#FFCC66" />
</asp:Menu>
<h1> Fill the below details to register</h1>
<table class="auto-style1" border="1">
<tr>
<td class="auto-style10">Full Name:</td>
<td class="auto-style16">
<asp:TextBox ID="tbfullname" runat="server" Width="160px" ></asp:TextBox>
</td>
<td class="auto-style11">
<asp:RequiredFieldValidator ID="RequiredFieldValidatorName" runat="server" controltovalidate="tbfullname" ErrorMessage="Name is mandatory" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style2">Email id:</td>
<td class="auto-style17">
<asp:TextBox ID="tbemail" runat="server" TextMode="Email" Width="160px"></asp:TextBox>
</td>
<td class="auto-style3">
<asp:RequiredFieldValidator ID="RequiredFieldValidatormail" runat="server" ControlToValidate="tbemail" ErrorMessage="Email Required" ForeColor="Red"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidatormail" runat="server" ControlToValidate="tbemail" ErrorMessage="invalid email" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" ForeColor="Red"></asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td class="auto-style7">Phone Number:</td>
<td class="auto-style18">
<asp:TextBox ID="tbphoneno" runat="server" TextMode="Phone" Width="160px" OnTextChanged="tbphoneno_TextChanged" ></asp:TextBox>
</td>
<td class="auto-style8">
<asp:RegularExpressionValidator ID="RegularExpressionValidatorphoneno" runat="server" ControlToValidate="tbphoneno" ErrorMessage="Phone number is invalid" ValidationExpression="[0-9]{10}" ForeColor="Red"></asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="RequiredFieldValidatorphoneno" runat="server" ControlToValidate="tbphoneno" ErrorMessage="Phone number is Required" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style13">Date of birth:</td>
<td class="auto-style19">
<asp:TextBox ID="tbdob" runat="server" TextMode="Date" Width="160px"></asp:TextBox>
</td>
<td class="auto-style14">
<asp:RequiredFieldValidator ID="RequiredFieldValidatordob" runat="server" ControlToValidate="tbdob" ErrorMessage="Date of birth is Required" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style2">Login id:</td>
<td class="auto-style17">
<asp:TextBox ID="tbloginid" runat="server" Width="160px"></asp:TextBox>
</td>
<td class="auto-style3">
<asp:RequiredFieldValidator ID="RequiredFieldValidatorloginid" runat="server" ControlToValidate="tbloginid" ErrorMessage="Login id is Required" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style4">Password:</td>
<td class="auto-style20">
<asp:TextBox ID="tbpwd" runat="server" TextMode="Password" Width="160px"></asp:TextBox>
</td>
<td class="auto-style5">
<asp:RequiredFieldValidator ID="RequiredFieldValidatorpwd" runat="server" ControlToValidate="tbpwd" ErrorMessage="password is Required" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style4">Confirm Password:</td>
<td class="auto-style20">
<asp:TextBox ID="tbconfirmpwd" runat="server" TextMode="Password" Width="160px"></asp:TextBox>
</td>
<td class="auto-style5">
<asp:RequiredFieldValidator ID="RequiredFieldValidatorconpwd" runat="server" ControlToValidate="tbpwd" ErrorMessage="Password is Required" ForeColor="Red"></asp:RequiredFieldValidator>
</td>
</tr>
<tr>
<td class="auto-style4"> </td>
<td class="auto-style20">
<asp:Button ID="btnRegsubmit" runat="server" Text="SignUp" OnClick="btnRegsubmit_Click" />
<input id="RegReset" type="reset" value="Reset" /></td>
<td class="auto-style5">
</td>
</tr>
</table>
</asp:Content>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
using System.Text.RegularExpressions;
namespace Expense_System
{
public partial class Register : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnRegsubmit_Click(object sender, EventArgs e)
{
String strConnString = ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
SqlConnection con = new SqlConnection(strConnString);
con.Open();
SqlCommand cmd = new SqlCommand();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "[dbo].[SpCreateUser]";
cmd.Parameters.Add("@Full_name", SqlDbType.VarChar).Value = tbfullname.Text;
cmd.Parameters.Add("@Dob", SqlDbType.Date).Value = tbdob.Text;
cmd.Parameters.Add("@email", SqlDbType.VarChar).Value = tbemail.Text;
cmd.Parameters.Add("@phoneno", SqlDbType.Int).Value = tbphoneno.Text;
cmd.Parameters.Add("@loginid", SqlDbType.VarChar).Value = tbloginid.Text;
cmd.Parameters.Add("@pwd", SqlDbType.VarChar).Value = tbpwd.Text;
cmd.Connection = con;
int totalrecordscreated =(int)cmd.ExecuteNonQuery();
Response.Write("No of created records " + totalrecordscreated.ToString());
con.Close();
}
protected void tbphoneno_TextChanged(object sender, EventArgs e)
{
if (!Regex.IsMatch(tbphoneno.Text,
@"(^([0-9]*|\d*\d{1}?\d*)$)"))
{
}
else
{
}
}
}
}
What I have tried:
protected void tbphoneno_TextChanged(object sender, EventArgs e)
{
if (!Regex.IsMatch(tbphoneno.Text,
@"(^([0-9]*|\d*\d{1}?\d*)$)"))
{
}
else
{
}
Is this correct? but not validating.
解决方案
)")) { } else { } } } }
What I have tried:
protected void tbphoneno_TextChanged(object sender, EventArgs e) { if (!Regex.IsMatch(tbphoneno.Text, @"(^([0-9]*|\d*\d{1}?\d*)
)")) { } else { }
Is this correct? but not validating.
Basically, don't do it in C# - that only runs at the Server, and that means each time the user presses a key, you need a post back to the server to to the validation. That's slow and inefficient - do it in the Client where the validation is all local: javascript numeric only input field - Google Search[^]
这篇关于如果只允许文本框中的数字，如果尝试输入字母表应该在webform中显示消息。 C＃ASP.NET的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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