Xamarin的Android的EditText - 必填错误显示在控制非空

Question

创建动态的EditText并添加“一些文本”将显示，即使文本已被添加到控制必填字段的错误信息......

//Create EditText 
editText = new EditText((Activity)form); 
editText.SetTextAppearance(Resource.Style.MyCustomTheme); 
editText.Text = "Some Text"; 
editText.Error = Html.FromHtml("<font color='black'>Cannot be Empty</font>").ToString(); 

Error is displayed even though text is in the control

Answer 1

你给的条件为它检查是否EditText上是空的或不 试试这个

editText = new EditText((Activity)form); 
editText.SetTextAppearance(Resource.Style.MyCustomTheme); 
editText.Text = "Some Text"; 
editText.TextChanged += (sender, e) => { 

    if (TextUtils.IsEmpty((sender as EditText).Text)) 
    { 
     editText.SetError("Text Can't be empty!", null); 

    } 
}; 

Answer 2

试试以下

editText = new EditText((Activity)form); 
editText.TextChanged += (sender, e) => { 

     if (TextUtils.IsEmpty((sender as EditText).Text)) 
     { 
      editText.SetError("Text Can't be empty!", null); 

     } 
};