使用IDataErrorInfo在验证期间启用禁用保存按钮

public class Person : IDataErrorInfo
{
    public string Name { get; set; }
    public int Age { get; set; }

    public string Error => null;

    public string this[string columnName]
    {
        get
        {
            string error = null;
            switch (columnName)
            {
                case nameof(Name):
                    if (string.IsNullOrEmpty(Name))
                        error = "Name is required.";
                    break;
                case nameof(Age):
                    if (Age <= 0)
                        error = "Age must be greater than zero.";
                    break;
            }
            return error;
        }
    }
}

<Button Content="Save" IsEnabled="{Binding Path=(IDataErrorInfo.Error), Mode=OneWay, Converter={StaticResource NullToBooleanConverter}}" />

var person = new Person();
person.Name = "John";
person.Age = -5; // 触发验证过程

if (string.IsNullOrEmpty(person.Error))
{
    // 保存按钮可用，执行保存操作
}
else
{
    // 保存按钮禁用，显示验证错误信息
}