ModelMetadata for complex type in editortemplate in asp.net mvc

问题

I have a viewmodel that includes a complex property of type TestThing which is declared as:

public class TestThing
{
        [Display(Name = "String3", Prompt = "String4")]
        public string Test1 { get; set; }

        [Display(Name = "String5", Prompt = "String6")]
        public string Test2 { get; set; }
}

I have an EditorTemplate for this type in which I would like to be able to access the meta data for each of the child properties. If the template was for a string for example, I could access the Prompt text by using @ViewData.ModelMetadata.Watermark, but because it is a complex type, I cannot use this method.

Is there an alternative?

回答1:

You could fetch the metadata for each property like this:

@{
    var metadata = ModelMetadata
        .FromLambdaExpression<TestThing, string>(x => x.Test2, ViewData);
    var watermak = metadata.Watermark;
}

回答2:

1) Check this out.

@Html.TextBoxFor
     (m => m.Test1 , 
        new {  
              @placeholder =  
              @ModelMetadata.FromLambdaExpression 
                  (m=>m.Test1 ,ViewData).Watermark.ToString()
            }
     )

来源：https://stackoverflow.com/questions/5336920/modelmetadata-for-complex-type-in-editortemplate-in-asp-net-mvc