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Question

前台<%@ Control Language="C#" AutoEventWireup="true" CodeFile="Login.ascx.cs" Inherits="Show_UserControls_Login" %>
<div style="text-align: center">
    <table border="3" cellpadding="1" cellspacing="1" style="width: 455px; height: 391px">
        <tr>
            <td style="background-color: skyblue">
                &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;欢迎登录农产品质量检测中心管理后台<asp:Login id="Login1" runat="server" BackColor="Transparent" BorderWidth="0px" OnLoggedIn="Login1_LoggedIn" OnLoginError="Login1_LoginError" OnLoggingIn="Login1_LoggingIn" Height="247px" Width="472px">
                <LayoutTemplate>
<table border="0" cellpadding="0" cellspacing="0" height="100%" width="70%">
    <tr>
        <td width="37%" style="height: 19px">
            &nbsp;</td>
        <td colspan="2" style="height: 19px">
            &nbsp;</td>
    </tr>
    <tr>
        <td colspan="3" style="height: 113px">
            <table border="0" cellpadding="0" cellspacing="6" width="100%">
                <tr>
                    <td class="r" width="9%">
                        &nbsp;</td>
                    <td class="i" style="width: 86px">
                        用 户 名</td>
                    <td align="center" style="width: 100px">
                        <asp:TextBox id="UserName" runat="server" Width="189px" Height="29px" style="border:1px solid ; font-size:14px" ForeColor="Gray" onclick="show_1();"></asp:TextBox></td>
                        
                        
                </tr>
                <tr>
                    <td class="r">
                        &nbsp;</td>
                    <td class="i" style="width: 86px">
                        密&nbsp;&nbsp; 码</td>
                    <td align="center" style="width: 100px">
                        <asp:TextBox id="Password" runat="server" textMode="Password" CssClass="e" Height="29px" Width="187px" style="border:1px solid ; font-size:14px"></asp:TextBox></td>
                </tr>
            </table>
        </td>
    </tr>
    <tr>
        <td style="height: 50px" id="TD2" runat="server">
            &nbsp;</td>
        <td align="center" colspan="2" style="height: 50px" id="TD1" runat="server">
            <asp:ImageButton id="Login" CommandName="Login" runat="server" ImageUrl="~/index.files/3.jpg" onMouseOver="ImageChange()" onMouseOut="ImageRestore()"/></td>
    </tr>
    <tr>
        <td colspan="3">
            <table border="0" cellpadding="0" cellspacing="5" width="100%">
                <tr>
                    <td style="height: 2px">
                        <img height="2" src="index.files/4.jpg" width="173" /></td>
                </tr>
            </table>
        </td>
    </tr>
    <tr>
        <td style="height: 29px">
        </td>
        <td style="height: 29px" width="17%">
            <img height="29" src="index.files/5.jpg" width="29" /></td>
        <td align="center" class="e" style="height: 29px; width: 54%;">
            <span style="font-size: 9pt; color:White">管理员登录</span></td>
    </tr>
</table>
</LayoutTemplate>
            </asp:Login>
            </td>
        </tr>
    </table>
</div>
后台public partial class Show_UserControls_Login : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
        
    }
    
    protected void Login1_LoggedIn(object sender, EventArgs e)
    {
        if (Roles.IsUserInRole(Login1.UserName, "Office1"))
        {
            Response.Redirect("~/Management/Office1/Default.htm");
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Office2"))
        {
            Response.Redirect("~/Management/Office2/Default.htm");
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Office3"))
        {
            Response.Redirect("~/Management/Office3/Default.htm");
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Office4"))
        {
            Response.Redirect("~/Management/Office4/Default.htm");
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Office5"))
        {
            Response.Redirect("~/Management/Office5/Default.htm");
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Office6"))
        {
            Response.Redirect("~/Management/Office6/Default.htm");  
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Office7"))
        {
            Response.Redirect("~/Management/Office7/Default.htm");
        }
        else if (Roles.IsUserInRole(Login1.UserName, "Admin"))
        {
            Response.Redirect("~/Management/Admin/Default.aspx");
        }
       
        else
        {
            Response.Redirect("~/UnAuthorization.aspx");
        }
    }
    protected void Login1_LoginError(object sender, EventArgs e)
    {
        Response.Redirect("~/Login_Error.aspx");
    }
    protected void Login1_LoggingIn(object sender, LoginCancelEventArgs e)
    {
        try
        {
            MembershipUser u = Membership.GetUser(Login1.UserName);
            bool flag = u.IsLockedOut;
            if (flag)
            {
                u.UnlockUser();
            }
        }
        catch
        {
        }
    }
}
出现缺少对象的错误

Answer 1

单步调试，看哪里报错，然后对症下药

Answer 2

下次上代码之前把错误信息也赋上来：
这就像伸一支脚叫别人猜里面的哪根腿手是被电吹风吹过一样。