小编ale*_*tet的帖子

我有一个数据验证ViewModel.当我加载时View,检查验证而不更改其内容,这TextBox意味着通过加载视图将错误样式设置为TextBox

这是代码:

XAML

<TextBox {...} Text="{Binding Path=ProductName,
               UpdateSourceTrigger=PropertyChanged, 
               ValidatesOnDataErrors=True}"/>

在ViewModel,使用数据注释进行验证:

Code

private string _productName;

[Required(AllowEmptyStrings = false, ErrorMessage = "The Product Name can't be null or empty.")]
[StringLength(50, ErrorMessage = "The Product Name can't be longer than 50.")]
[Uniqueness(Entities.Product, ErrorMessage = "A Product with that Name already exists ")]
public string ProductName
{
    get { return _productName; }
    set
    {
        _productName = value;
        SaveProduct.OnCanExecuteChanged();
        OnPropertyChanged("ProductName");
    }
}

如何加载视图时如何停止验证触发？

我不希望在TextBox插入数据之前显示错误.

我有以下代码用python 2.7编写

# -*- coding: utf-8 -*-    
import sys

_string = "años luz detrás"
print _string.encode("utf-8")

这会引发以下错误:

print _string.encode("utf-8")
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 1: ordinal not in range(128)

任何帮助表示感谢,提前谢谢

我有这个xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:l="clr-namespace:My.Windows"
                    >
    <ObjectDataProvider x:Key="TitledWindow_Test" MethodName="Test" ObjectInstance={x:Type l:TitledWindow}">
    <ControlTemplate x:Key="TitledWindowControlTemplateKey" x:Name="PART_ControlTemplate" TargetType="{x:Type l:TitledWindow}"
        <Rectangle>
            <Rectangle.Style>
                <EventSetter Event="Mouse.MouseEnter" Handler="{StaticResource TitledWindow_Test}">
            </Rectangle.Style>
        </Rectangle>
    </ControlTemplate>
</ResourceDictionary>

我的c#代码:

namespace My.Windows
{
    public partial class TitledWindow : Window
    {
        public void Test()
        {
            MessageBox.Show("Test");
        }
    }
}

问题是我收到以下错误:

错误1
"ResourceDictionary"根元素需要ax:Class属性来支持XAML文件中的事件处理程序.删除MouseEnter事件的事件处理程序,或将ax:Class属性添加到根元素.