I try to find a simple way to get the DisplayName of a model property.
DisplayName("FullName")]
public string Name { get; set; }
In an .razor page I can not seems to get it in (example) label or even see it in an InputText
<label asp-for="Model.Name" class="control-label"></label>
<InputText class="form-control" DisplayName="Model.Name" @bind-Value="@Model.Name" />
Does anybody knows how to get this?
You can use the below extension method:
public static string GetDisplayName<TModel, TProperty>(this TModel model, Expression<Func<TModel, TProperty>> expression)
{
Type type = typeof(TModel);
MemberExpression memberExpression = (MemberExpression)expression.Body;
string propertyName = ((memberExpression.Member is PropertyInfo) ? memberExpression.Member.Name : null);
// First look into attributes on a type and it's parents
DisplayAttribute attr;
attr = (DisplayAttribute)type.GetProperty(propertyName).GetCustomAttributes(typeof(DisplayAttribute), true).SingleOrDefault();
// Look for [MetadataType] attribute in type hierarchy
// http://stackoverflow.com/questions/1910532/attribute-isdefined-doesnt-see-attributes-applied-with-metadatatype-class
if (attr == null) {
MetadataTypeAttribute metadataType = (MetadataTypeAttribute)type.GetCustomAttributes(typeof(MetadataTypeAttribute), true).FirstOrDefault();
if (metadataType != null) {
var property = metadataType.MetadataClassType.GetProperty(propertyName);
if (property != null) {
attr = (DisplayAttribute)property.GetCustomAttributes(typeof(DisplayNameAttribute), true).SingleOrDefault();
}
}
}
return (attr != null) ? attr.Name : String.Empty;
}
and call it this way:
HelperNamespace.GetDisplayName(YourClass, m => m.Name)
and if you want to use this in Blazor, you can do it this way:
<label class="control-label">@(HelperNamespace.GetDisplayName(YourClass, m => m.Name))</label>