Databinding Entry in Xamarin Forms - xamarin

Question

I'm trying to capture the value of the entry in a Login text box in Xamarin Forms. I've created the class, data bound in xmal, but running into build errors when compiling for iOS. Any pointers much appreciated.
Login.xmal:
<Entry x:Name="{Binding Source = AppLoginUsername;}" Placeholder="Username"
Grid.Row="3" Grid.Column="0" Grid.ColumnSpan="3"
HorizontalOptions="StartAndExpand" WidthRequest="300" />
FormEntry Class.cs
using System;
namespace SGC.Class
{
public class FormEntryBindings
{
public FormEntryBindings()
{
}
public static string AppLoginUserName { get; set; }
}
}
Home.cs (Grabs the username entered in Login page and figures out the CustomerID)
private async void getCustBalance()
{
HttpClient client = new HttpClient();
string x = FormEntryBindings.AppLoginUserName;
int custid = GetCustomerId(x);
The errors are:
Invalid token '{' in class, struct, or interface member declaration
Invalid expression term '='
Type or namespace definition, or end-of-file expected

Answer 1

Why dont you just give it a name, and bind the text?
Eg
x:Name=“User” Text=“{Binding AppLoginUsername}”...

Answer 2

Well, based on the comments, I think your problem is that you can get the AppLoginUserName in the login page, however,you want use the AppLoginUserName in another page(another view).
I would give your several suggestions:
1.You can pass the value to the page where you want to use.
2.Use Xamarin.Essentials: Preferences.
You can save the AppLoginUserName once the user has logged in:
using Xamarin.Essentials;
Preferences.Set("AppLoginUserName", "value");
At another view where you want to use, you can get the value:
var myValue = Preferences.Get("AppLoginUserName", "default_value");
And remove the key from preferences when the user has logged out or under other situation:
Preferences.Remove("my_key");
You can refer:essentials/preferences

Answer 3

You can’t bind the name. Name is something that generates the code and you can’t change the name of the variable on the fly.