如何限制数据绑定 WinForms TextBox 中允许的字符数量

Question

I have text boxes that are data bound to a field in a database and am using Entity Framework. The limit on the field is 10. How can I have the control recognize this limit?

Answer 1

Mark up your entitiy metadata with the following Data Annotation:

[StringLength(4, ErrorMessage = "The string value cannot exceed 4 characters. ")]

http://msdn.microsoft.com/en-us/data/gg193959

Answer 2

There is no connection between data annotation / entity framework metadata and winform controls = it will not set MaxLength for you or add automatic validation.