错误：在类型中找不到具有正确签名的事件处理程序“btnLogin_Clicked”

Question

我正在尝试在 Xamarin 中创建针对 LDAP 的身份验证。我有 Main.xaml，我在其中创建了带有按钮的简单登录表单（Entry Placeholder="*Password" IsPassword="True" x:Name="login_password"）（Button Clicked ="btnLogin_Clicked" Text="Sign in" x:Name ="btn登录")。Main.xaml.cs 包含 LDAP 连接的代码。我在那里检查凭据并尝试绑定。

不幸的是，我收到此错误：“在类型‘Main.xaml’中找不到具有正确签名的事件处理程序‘btnLogin_Clicked’”。

我花了很多时间在这上面，但仍然不明白我做错了什么。如果有人可以帮助我或给我一些关于在哪里可以搜索答案的建议，我将不胜感激。

我的一段代码：

---

public void btnLogin_Clicked(object sender,string login_username, string login_password, System.EventArgs e)
    {


        string searchBase = "dc = it, dc = local";
        string searchFilter = "(amemberOf=ALL)";
        string ldapHost = "7777.. ";
        int ldapPort = 389;
        string loginDN = "dc = it, dc = local";

        /*if username or passworwd fields are empty show an error*/

        if (login_username is null || login_password is null)
        {
             DisplayAlert("Alert", "Please, enter your credentials", "OK");

        }
        else
        {
            /*creating an LDAP instance*/
            using (LdapConnection connection = new LdapConnection())

                /*here we create new ldap connection*/
                try
                {
                    /*connect function will creat socket connection to the server*/
                    connection.Connect(ldapHost, ldapPort);
                    connection.Bind(string.Format("{0}@{1}", loginDN, login_username), login_password);
                    LdapSearchQueue queue = connection.Search(searchBase,
                    LdapConnection.SCOPE_ONE, searchFilter, null, false, (LdapSearchQueue)
                    null, (LdapSearchConstraints)null);
                    LdapMessage message;

                    while ((message = queue.getResponse()) != null)
                    {
                        if (message is LdapSearchResult)
                        {
                            /*display message if connect*/
                             DisplayAlert("" ," logged in ", "OK ");
                        }
                        else
                        {
                            /*if the message is not null but the login was failed*/
                            DisplayAlert("", "Login failed", "OK ");


                        }...

Answer 1

按钮的事件处理程序具有签名

public void btnLogin_Clicked(object sender, System.EventArgs e)

您不能只向签名添加额外的参数