价值''无法转换 [英] Value '' cannot be converted

问题描述

我有一个DatePicker控件。我总是得到错误

价值''无法转换

我设置

 TargetNullValue = ''

。不工作



我尝试过：

我设置< pre> TargetNullValue =''

。不工作

解决方案

''不是一个值：它是一个字符文字，里面没有字符。有点像没有杯子说一杯咖啡！



你需要在引号内加一个字符说明符，这可能会插入一个空字符 （与空值不同）：

 TargetNullValue ='\ 0'

I添加了一个属性然后错误就消失了。

 {FallbackValue = ' '，TargetNullValue = ' '} 
 

I have a DatePicker control. I always get the error

Value '' cannot be converted

I set

TargetNullValue=''

. Not working

What I have tried:

I set <pre>TargetNullValue=''

. Not working

解决方案

'' is not a value: it's a "character literal" without a character inside it. A bit like saying "a cup of coffee" without the cup!

You need a character specifier inside the quotes, like this perhaps which may insert a "null character" (not the same as a null value):

TargetNullValue = '\0'

I added one more property then the error is gone.

{FallbackValue='',TargetNullValue=''}

这篇关于价值''无法转换的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！