C# 数据注释MVC
只有在用户名模型中有值时,我才能添加必填字段 我有:C# 数据注释MVC,c#,jquery,html,asp.net-mvc,C#,Jquery,Html,Asp.net Mvc,只有在用户名模型中有值时,我才能添加必填字段 我有: @Html.PasswordFor( model => model.Password, new { required = "This field is required" } ) 我想: @Html.PasswordFor( model => model.Password, new { if (Model.UserName != null) {required = "This field is
@Html.PasswordFor(
model => model.Password,
new { required = "This field is required" }
)
我想:
@Html.PasswordFor(
model => model.Password,
new { if (Model.UserName != null) {required = "This field is required"} }
)
谢谢好的,您可以使用三元运算符
?:
@Html.PasswordFor(
model => model.Password,
new { required = Model.UserName != null ? "This field is required" : null }
)
或者(如果将required
设置为null不起作用),则可以将其使用一级:
@Html.PasswordFor(
model => model.Password,
Model.UserName != null
? new { required = "This field is required" }
: new { }
)
你可以简单地使用
if(Model.UserName != null)
{
@Html.PasswordFor(model => model.Password, new { required = "This fiels is required"})
}
else
{
@Html.PasswordFor(model => model.Password)
}
你为什么要把事情复杂化?谢谢你的回答@zakzak酷毙了,第一个版本最终成功了吗?@Html.PasswordFor(model=>model.Password,model.UserName!=null?new{required=”“}:null))是的,对于null它工作得很好,再次感谢:)