Question

I need to create a editor template for diferent type of data for example: for string I need a EditorTemplate for largeString and for shortstring

I see that the best way for me is using editor template. so can I use AdditionalMetadata? for something like this?

 [UIHint("StringLarge")]
    [AdditionalMetadata("width", "50px")]
    public DateTime Date { get; set; }

My editor Template StringLarge.cshtml

@inherits System.Web.Mvc.WebViewPage<System.String> 

if("have AdditionalMetadata"){
@Html.TextBox("", Model, new { @class = "StringLarge" })
}
else
{
@Html.TextBox("", Model, new { @class = "StringShort" })
}

Can I do that or just create separtes EditorTemplate for stringLarge and StringShort?

Answer 1

You can do that by writing a custom attribute implementing the IMetadataAware interface:

public class MyStringsAttribute : Attribute, IMetadataAware
{
    private readonly string _value;
    public MyStringsAttribute(string value)
    {
        _value = value;
    }

    public void OnMetadataCreated(ModelMetadata metadata)
    {
        metadata.TemplateHint = "Strings";
        metadata.AdditionalValues["someKey"] = _value;
    }
}

and then:

[MyStrings("somevalue")]
public DateTime Date { get; set; }

and finally inside your custom editor template (~/Views/Shared/EditorTemplates/Strings.cshtml) you could check for the presence of this additional metadata:

@{
    var additionalMetadata = (string)ViewData.ModelMetadata.AdditionalValues["someKey"];
}

@if (string.Equals(additionalMetadata, "somevalue"))
{
    ...    
}
else
{
    ...
}