.NET 4.0中的ConversionValidationRule

本文介绍了.NET 4.0中的ConversionValidationRule的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个文本框，该文本框绑定到可为null的int属性.我只是将我的应用程序转换到.Net 4.0，现在当我在文本框中输入数字然后删除它时，出现类型为System.Windows.Controls.ConversionValidationRule的验证错误. 在运行时发生验证错误时，我可以看到绑定没有与之关联的任何验证规则，因此.Net 4.0中似乎有些东西会在后台自动创建验证规则. 何时 我将项目切换回.Net 3.5，此问题消失了. .Net 4.0中还有其他人注意到吗? 有没有办法关闭此自动验证功能?

I have a text box that is bound to a nullable int property. I just converted my application over to .Net 4.0, and now when I enter a number into the textbox and then delete it I get a validation error of typeSystem.Windows.Controls.ConversionValidationRule. When the validation error occurs at runtime I can see that the binding does not have any validation rules associated with it, so it looks like there is something in .Net 4.0 that is automatically creating a validation rule behind the scenes. When I switch my project back to .Net 3.5 this issues goes away. Has anyone else noticed this in .Net 4.0? Is there a way to turn this automatic validation off?

谢谢

推荐答案

检查您是否没有返回DependencyProperty.UnsetValue的转换器. Check that you don't have any converters returning DependencyProperty.UnsetValue.