如何设置文本框空字符串的默认值，而不是空的 [英] How to set default value of TextBox empty string instead of null

问题描述

我可能会过时，但一个原则我坚持是避免空值尽可能。

I may be out of date, but one principle I adhere to is avoid nulls as much as possible.

不过我发现是，在用户输入的对象我要救，如果不进入某些领域他们被指定为NULL。的属性强类型视图

However what I have found is that for a strongly typed view in which the user inputs the properties of an object I want to save, if some fields are not entered they are assigned as null.

然后，当您尝试保存更改，验证失败。

Then when you try to save the changes, the validation fails.

因此​​，而不是每个属性设置为空字符串，我怎么能自动设置文本框的每个窗体上默认为空字符串，而不是空？

So rather than set each property to an empty string, how can I automatically set each TextBox on a form to default to an empty string rather than a null?

推荐答案

您可以把你的字符串的属性以下属性在你的模型：

You could put the following attribute on your string-properties in your model:

[DisplayFormat(ConvertEmptyStringToNull=false)]

所以每当有人张贴带有空文本字段的表单，这些都将是一个空字符串，而不是空...

So whenever someone posts a form with empty text-fields, these will be an empty string instead of null...

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