Question

早上好

我最近在学习C＃和.net并尝试制作注册页面。

IF Username ='HelloWorld1'和Password ='密码'

基本上我尝试测试一下，如果用户是管理员或我已在数据库中硬编码的员工，

然后会出现此测试框

然后

<!--this is html code -->
<tbody id ="tbody" runat="server" visible ="false">
            <tr>





                <td class="auto-style1">IsEmployee</td>
                <td class="auto-style1">
                    <asp:CheckBox ID="CheckBox1" runat="server" />
                </td>
                <td class="auto-style1">


                </td>

            </tr>
            <tr>
                <td>IsAdmin</td>
                <td>
                    <asp:CheckBox ID="CheckBox2" runat="server" />
                </td>
                <td>&nbsp;</td>
            </tr>

            </tbody>

显示

我的代码是

 protected void CustomValidator3_ServerValidate(object source, ServerValidateEventArgs args)
        {

            String Artists = System.Configuration.ConfigurationManager.ConnectionStrings["FleetManagementConnectionString"].ConnectionString;
            System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection(Artists);

            SqlCommand objcmd = new SqlCommand("Select * from dbo.UserLoggins where UserName ='HelloWorld1' and Password ='password'", con);
            SqlDataReader objReader;
            con.Open();
            objReader = objcmd.ExecuteReader();

            if (objReader.HasRows)
            {
                args.IsValid = false;
                tbody.Visible = true;

                args.IsValid = true;
            }
            con.Close();
        }

如何使此代码生效？

非常感谢，祝你有美好的一天。

Answer 1

嗯，是的，有问题，但是如果你只是想让你的例子工作试试这个。假设您正确配置了自定义验证器控件，您只想返回IsValid是真还是假。

int count = 0;

using (SqlConnection con = new System.Data.SqlClient.SqlConnection(ConfigurationManager.ConnectionStrings["FleetManagementConnectionString"].ConnectionString))
{
    SqlCommand command = new SqlCommand("Select Count(*) from dbo.UserLoggins where UserName =@User and Password =@Password", con);

    SqlParameter paramName = new SqlParameter("@User", SqlDbType.VarChar, 255) { Value = "HelloWorld1" };
    command.Parameters.Add(paramName);

    SqlParameter paramName = new SqlParameter("@Password", SqlDbType.VarChar, 255) { Value = "password" };
    command.Parameters.Add(paramName);

    con.Open();
    count = (int)cmd.ExecuteScalar();
    con.Close();

}

args.IsValid = count > 0;
return;

如何设置/使用自定义验证器语法

1 个答案: