Question

我不知道为什么我的验证不起作用，因为当我单击“创建”按钮时页面只是刷新，即使我的字段没有输入任何值。但是当我在用户名字段输入值时，REgularValidator将会出现。

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeFile="createmember.aspx.cs" Inherits="member" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" runat="Server">
    <script type="text/javascript">
         $(document).ready(function () {
                $("#MainContent_username").change(function () {
                    var uname = $("#MainContent_username");
                    var msgbox = $("#status");
                    if (uname.val().length < 6) {
                        msgbox.html('<font color="#cc0000">User Name must be more than 5 characters</font>');
                    } else {
                        $.ajax({
                            type: "POST",
                            url: "createmember.aspx/DoesUserExist",
                            data: "{'username': '" + uname.val() + "'}",
                            contentType: "application/json; charset=utf-8",
                            dataType: "json",
                            success: function (msg) {
                                if (msg.d == false) {
                                    msgbox.html('<font color="Green">User Name Available </font>');
                                }
                                else {
                                    msgbox.html('<font color="Red">User Name Exist</font>');
                                }
                            }
                        });
                    }
                });
            });
        </script>
    </asp:Content>
    <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="Server">
        <h2>
            Create Member</h2>

        <fieldset>
            <div id="createform">
                <div class="formlabel">
                    Login Name :</div>
                <asp:TextBox ID="username" runat="server"></asp:TextBox>
                <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" 
                    ControlToValidate="username" ErrorMessage="RegularExpressionValidator" 
                    SetFocusOnError="True"></asp:RegularExpressionValidator>
                <span id="usernameempty"></span>
                <span id="status"></span>
                <br />
                <div class="formlabel">
                    Password :</div>
                <asp:TextBox ID="password" runat="server" TextMode="Password"></asp:TextBox>
                <br />
                <div class="formlabel">
                    First Name :</div>
                <asp:TextBox ID="firstname" runat="server"></asp:TextBox>
                <br />
                <div class="formlabel">
                    Last Name :</div>
                <asp:TextBox ID="lastname" runat="server"></asp:TextBox>

                <br />
                <div class="formlabel">
                    Email :</div>
                <asp:TextBox ID="email" runat="server"></asp:TextBox>
                <br />
                <div class="formlabel">
                    User Role :</div>
                <asp:DropDownList ID="role" runat="server">
                    <asp:ListItem Value="2">Admin</asp:ListItem>
                    <asp:ListItem Value="3">Staff</asp:ListItem>
                    <asp:ListItem Value="4">Driver</asp:ListItem>
                    <asp:ListItem Value="5">Manager</asp:ListItem>
                    <asp:ListItem Value="1">Super Admin</asp:ListItem>
                </asp:DropDownList>
                <br />
                <asp:Button ID="submit" runat="server" Text="Create" OnClick="submit_Click" />
                <br />
                <asp:Label ID="msg" runat="server" Text=""></asp:Label>
                <div style="clear: both;" />
            </div>
        </fieldset>
    </asp:Content>

我的后端代码。

 static string connectionString;
protected void Page_Load(object sender, EventArgs e)
{
    connectionString = "SERVER=localhost;DATABASE=db;UID=root;PASSWORD=password;";
}
protected void submit_Click(object sender, EventArgs e)
{
    string usertypevalue = role.SelectedValue.ToString();
    string firstnamevalue = firstname.Text;
    string lastnamevalue = lastname.Text;
    string usernamevalue = username.Text;
    string passwordvalue = password.Text;
    if (!DoesUserExist(usernamevalue))
    {
        MySqlConnection connect = new MySqlConnection(connectionString);
        MySqlCommand command = connect.CreateCommand();

        command.CommandText = "Insert into user (UserTypeID, FirstName, LastName, LoginName, LoginPassword, DateTimeCreated, LastLoginDate) values ('"
            + usertypevalue + "','" + firstnamevalue + "','" + lastnamevalue + "','" + usernamevalue + "','" + passwordvalue + "','" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + "','0000-00-00 00:00:00')";
        try
        {
            //connect.Open();
           // command.Connection = connect;
            //command.ExecuteNonQuery();
            msg.Text = "Member account created successfully";
            msg.ForeColor = System.Drawing.Color.Green;
        }
        catch
        {
            msg.Text = "Error Occured, Please try again!";
            msg.ForeColor = System.Drawing.Color.Red;
        }
        finally
        {
            connect.Close();
        }
    }
    else
    {

    }
}

[System.Web.Services.WebMethod]
public static bool DoesUserExist(string username)
{
    bool exist = false;
    MySqlConnection connect = new MySqlConnection(connectionString);
    try
    {

        connect.Open();
        string query = "SELECT Count(*) FROM User WHERE LoginName = '" + username + "'";
        //Create Mysql Command
        MySqlCommand cmd = new MySqlCommand(query, connect);

        //ExecuteScalar will return one value
        int Count = int.Parse(cmd.ExecuteScalar() + "");
        if (Count > 0)
        {
            exist = true;
        }
    }
    finally
    {
        connect.Close();
    }
    return exist;
}

Answer 1

如果输入控件为空，则验证成功。如果关联的输入控件需要一个值，除了RegularExpressionValidator控件之外，还要使用RequiredFieldValidator控件。

RegularExpressionValidator

Answer 2

似乎ValidationGroup问题...如果您需要验证按钮上的任何控件，请单击该控件，验证器和按钮应该在同一组，因此如果您使用以下文本框，验证器和按钮，我希望它能解决你的问题

 <asp:TextBox ID="username" ValidationGroup="group1" runat="server"></asp:TextBox>
 <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" 
       ControlToValidate="username" ValidationGroup="group1" ErrorMessage="RegularExpressionValidator" 
                SetFocusOnError="True">
</asp:RegularExpressionValidator>
............
<asp:Button ID="submit" runat="server" ValidationGroup="group1" Text="Create" OnClick="submit_Click" />

ASP.net验证没有火

2 个答案: