asp.net刚开始学习遇到的问题

Question

按照书上敲的模拟用户登录
.aspx文件代码

            <tr><td colspan="2" align="center"><asp:Label ID="Label1" runat="server" Text="系统用户登录"></asp:Label></td></tr>
            <tr><td align="center" class="style1"><asp:Label ID="Label2" runat="server" Text="用户名"></asp:Label></td>
            <td><asp:TextBox ID="txtUserName" runat="server" Height="21px" Width="187px"></asp:TextBox></td></tr>
            <tr><td align="center" class="style1"><asp:Label ID="Label3" runat="server" Text="密码"></asp:Label></td>
            <td><asp:TextBox ID="txtUserPass" runat="server" Height="21px" Width="187px" TextMode="Password"></asp:TextBox></td></tr>
            <tr><td align="center" class="style1"><asp:Label ID="Label4" runat="server" Text="用户级别"></asp:Label></td>
            <td><asp:RadioButton ID="RadioButton1" runat="server" Text="管理员" GroupName="level" />
                <asp:RadioButton ID="RadioButton2" runat="server" Text="会员" GroupName="level" />
                <asp:RadioButton ID="RadioButton3" runat="server" Text="用户" GroupName="level" /></td></tr>
            <tr><td align="right" class="style1"><asp:Button ID="btnLog" runat="server" Text="登录"  OnClick="Button1_Click" /></td>
            <td align="left"><asp:Button ID="btnReset" runat="server" Text="重置"  OnClick="Button2_Click" />
            </td></tr></table>

         以及 .cs代码

protected void btnLog_Click(object sender, EventArgs e) 
        {
            if (string.IsNullOrEmpty(txtUserName.Text) == true || string.IsNullOrEmpty(txtUserPass.Text) == true) return;
            if (txtUserName.Text == "admin" && txtUserPass.Text == "123456")
            {
                Response.Write("<script>alert('欢迎登录!')</script>"); return;
            }
            else 
            {
                Response.Write("<script>alert('错误，重新输入!')</script>");return;
            }

        }
        protected void btnReset_Click(object sender, EventArgs e)
        {
            txtUserName.Text= "";
            txtUserPass.Text = "";
        }

然后出现的报错

百度未果，来论坛咨询

Answer 1

您好,

你的登录按钮的事件名是Button1_Click, 重置按钮的事件名是Button2_Click. 这和后台的事件名不匹配. 系统会在后台找这两个事件名,可是后台没有,所以会报这个错.
你的代码:

 <tr><td align="right" class="style1"><asp:Button ID="btnLog" runat="server" Text="登录"  OnClick="Button1_Click" /></td>
 <td align="left"><asp:Button ID="btnReset" runat="server" Text="重置"  OnClick="Button2_Click" />

protected void btnLog_Click(object sender, EventArgs e) 
protected void btnReset_Click(object sender, EventArgs e)

正确的代码:

 <tr><td align="right" class="style1"><asp:Button ID="btnLog" runat="server" Text="登录"  OnClick="btnLog_Click" /></td>
 <td align="left"><asp:Button ID="btnReset" runat="server" Text="重置"  OnClick="btnReset_Click" />

protected void btnLog_Click(object sender, EventArgs e) 
protected void btnReset_Click(object sender, EventArgs e)

你可以在写click事件的时候,选择系统给出的默认名,不需要手动输入.