【发布时间】：2020-10-19 11:40:15
【问题描述】：
我正在尝试使用 asp.net 创建一个 Web 表单，但效果不佳，希望有人能帮助我。
如果用户不是在开始时输入按钮，我如何才能显示验证？
我希望用户只有在出现问题或不正确时才能看到评论。
还有，我点击按钮后出现了他的错误，你知道为什么吗？
异常详细信息：System.Data.SqlClient.SqlException：'has' 附近的语法不正确。
以下是一些截图： The validation Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near 'has'. Message after click at the button
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;
namespace RegistrationForm1
{
public partial class WebForm1 : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(@"Data Source=DESKTOP-20J5J59; Integrated Security=True");
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
con.Open();
SqlCommand cmd = con.CreateCommand();
cmd.Parameters.AddWithValue("@TTitle", TxtTitle.Text);
cmd.Parameters.AddWithValue("@TName", TxtName.Text);
cmd.Parameters.AddWithValue("@TID", TxtID.Text);
cmd.Parameters.AddWithValue("@TEmail", TxtEmail.Text);
cmd.Parameters.AddWithValue("@TMobile", TxtMobile.Text);
cmd.Parameters.AddWithValue("@LMajor", LstMajor.SelectedItem.ToString()););
cmd.Parameters.AddWithValue("@TNote", TxtNote.Text);
cmd.CommandText = "Your request has been submitted successfully";
cmd.ExecuteNonQuery();
con.Close();
}
}
}<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="RegistrationForm1.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
.auto-style1 {
height: 247px;
width: 628px;
}
.auto-style3 {
height: 24px;
}
.auto-style4 {
height: 24px;
width: 86px;
}
.auto-style5 {
width: 86px;
}
.auto-style6 {
width: 86px;
height: 30px;
}
.auto-style7 {
height: 30px;
}
.auto-style8 {
color: #FF0000;
}
.auto-style9 {
width: 86px;
height: 28px;
}
.auto-style10 {
height: 28px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<table align="center" class="auto-style1">
<caption>Registration Form</caption>
<tr>
<td class="auto-style4">Title: </td>
<td class="auto-style3">
<asp:TextBox ID="TxtTitle" runat="server" placeholder="Title" Width="210px"></asp:TextBox><span class="auto-style8">Enter a title.</span></td>
</tr>
<tr>
<td class="auto-style6">Name:</td>
<td class="auto-style7">
<asp:TextBox ID="TxtName" runat="server" placeholder="Full name" Width="210px"></asp:TextBox><span class="auto-style8">Enter full name.</span></td>
</tr>
<tr>
<td class="auto-style9">ID:</td>
<td class="auto-style10">
<asp:TextBox ID="TxtID" runat="server" placeholder="201600000" Width="208px" TextMode="Number"></asp:TextBox><span class="auto-style8">Enter ID. </span>
<asp:RegularExpressionValidator ID="RegularExpressionValidator3" runat="server" ErrorMessage="RegularExpressionValidator" ControlToValidate="TxtID" ForeColor="Red" ValidationExpression="\d(9)">Invalid ID</asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td class="auto-style5">E-mail:</td>
<td>
<asp:TextBox ID="TxtEmail" runat="server" placeholder="name@example.com" Width="209px" TextMode="Email"></asp:TextBox><span class="auto-style8">Enter E-mail. </span>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TxtEmail" ErrorMessage="RegularExpressionValidator" ForeColor="Red" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">Invalid E-mail</asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td class="auto-style5">Mobile No:</td>
<td>
<asp:TextBox ID="TxtMobile" runat="server" placeholder="966500000000" Width="210px" TextMode="Number"></asp:TextBox><span class="auto-style8">Enter mobile No. </span>
<asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" ControlToValidate="TxtMobile" ErrorMessage="RegularExpressionValidator" ForeColor="Red" ValidationExpression="\d(10)">Invalid Mobile Number</asp:RegularExpressionValidator>
</td>
</tr>
<tr>
<td class="auto-style5">Major:</td>
<td>
<asp:DropDownList ID="LstMajor" runat="server" Height="17px" Width="218px">
<asp:ListItem>Select Option</asp:ListItem>
<asp:ListItem>Accounting</asp:ListItem>
<asp:ListItem>Architecture</asp:ListItem>
<asp:ListItem>Business Administration</asp:ListItem>
<asp:ListItem>Computer Science</asp:ListItem>
<asp:ListItem>Computer Engineering</asp:ListItem>
<asp:ListItem>Civil Engineering</asp:ListItem>
<asp:ListItem>Electrical Engineering</asp:ListItem>
<asp:ListItem>Finance</asp:ListItem>
<asp:ListItem>Graphic Design</asp:ListItem>
<asp:ListItem>Human Resource Management</asp:ListItem>
<asp:ListItem>Information Technology</asp:ListItem>
<asp:ListItem>Interior Design</asp:ListItem>
<asp:ListItem>Law</asp:ListItem>
<asp:ListItem>Mchanical Engineering</asp:ListItem>
<asp:ListItem>Managment Information System</asp:ListItem>
<asp:ListItem>Software Engineering</asp:ListItem>
<asp:ListItem>Other</asp:ListItem>
</asp:DropDownList><span class="auto-style8">Choose major.</span></td>
</tr>
<tr>
<td class="auto-style5">Note:</td>
<td>
<asp:TextBox ID="TxtNote" placeholder="Add More Information..." runat="server" Width="210px" Height="76px" TextMode="MultiLine"></asp:TextBox></td>
</tr>
<tr>
<td align="center" colspan="2">
<br />
<asp:Button ID="Button1" runat="server" Text="Register" Font-Size="Medium" Height="36px" Width="110px" OnClientClick=" return confirm(Your request has been submitted successfully" OnClick="Button1_Click" /></td>
</tr>
</table>
</div>
</form>
</body>
</html>【问题讨论】：
标签： javascript html sql asp.net webforms