I want to create a wrapper around this existing helper:
@Content.Url("...")
How can I create a helper to wrap this and add a parameter to it?
My Controller has a property:
public bool IsAdmin {get; set;}
I want to somehow reference this value from my controller and use it like:
@MyContent.Url("...", IsAdmin)
How can I do this? Is the only way to add IsAdmin
to my ViewModel
?
You can either add IsAdmin
to your model or make it a static property that stores the value in HttpContext.Current.Items
. Alternatively it can read the value dynamically from HttpContext.Request
.
public static bool IsAdmin
{
get { return (HttpContext.Current.Items["IsAdmin"] as bool?) ?? false; }
set { HttpContext.Current.Items["IsAdmin"] = value; }
}
You can create a custom extension method like this
public static Content(this UrlHelper helper, string contentPath, bool isAdmin)
{
// do something with isAdmin
helper.Content(contentPath);
}
Here is a very good example of what you are looking for:
public class UrlHelperEx : UrlHelper
{
#region Constants
private const string c_VERSION_FORMAT = "{0}?v={1}";
#endregion
#region Initialization
public UrlHelperEx(RequestContext requestContext)
: base(requestContext)
{
}
#endregion
#region Public methods
public string Content(string contentPath,bool forceupdate=false)
{
var content = base.Content(contentPath);
if (!forceupdate) {
return content.ToString();
}
else
{
Version version = WebHelper.GetApplicationVersion(this.RequestContext.HttpContext);
return string.Format(c_VERSION_FORMAT, content
, version.ToString());
}
}
#endregion
}
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