我有一个绑定到 winform 的对象,这个对象实现了 IDataErrorInfo。我有一个错误提供程序。问题是当 aa 属性的属性发生变化时。
更改年龄时没有问题(即规则已正确检查并显示/删除)。但是当我更改职位时,错误不会显示/删除(实际上属性 Title 不属于对象人员)。我该如何进行检查?
this.errorProvider1.DataSource = this.bindingSourcePerson;
bindingSourcePerson.DataSource = new Person();
textBoxAge.DataBindings.Add("Text", bindingSourcePerson, "Age");
textBoxJobTitle.DataBindings.Add("Text", bindingSourcePerson, "CurrentJob.Title");
public class Person : IDataErrorInfo
{
public double Age { get; set; }
private Job _job = new Job();
public Job CurrentJob { get { return _job; } set { _job = value; } }
public string this[string columnName]
{
get
{
_lastError = "";
switch (columnName)
{
case "Age":
case "CurrentJob.Title":
if (!string.IsNullOrEmpty(CurrentJob.Title) && Age < 16)
_lastError = "Invalid job.";
break;
default: _lastError = "";
break;
}
return _lastError;
}
}
private string _lastError = "";
public string Error
{
get { return _lastError; }
}
public class Job
{
public string Title { get; set; }
}