Question

My app: VS2010, MVC3, C#, latest ELMAH

Case: some errors happens (e.g. null reference), custom error page is shown (customErrors mode=”On”).

Task: allow admins (users in role Admins, ) view error detail from custom error page

Question: How to obtain/pass elmah error id to the custom error page view ?

Upd: Related answered question: ELMAH – Using custom error pages to collecting user feedback

Custom error page sample:

@model System.Web.Mvc.HandleErrorInfo
@{
  ViewBag.Title = "Error";
}
<h2>
  Error processing a request.
  @if (User.IsInRole(MyAppNamespace.Constants.ROLE_ADMIN))
  {
    // where to obtain ELMAH error id to navigate to error details ?
    // elmah/detail?id=291f5e83-5756-43bf-a889-07a548727da7
    <a href="@Url.Content("~/elmah")">View error details</a>
  }
</h2>

Answer 1

It is an event in Elmah ErrorLog module, that can be handled in Global.asax.cs:

protected void ErrorLog_Logged(object sender, ErrorLoggedEventArgs args)
{
    Session["ElmahId"] = args.Entry.Id;
}

Then we can use stored id to navigate to error (I am using Elmah.Mvc module that implements special controller instead of default elmah pages). In Error.cshtml:

@if (User.IsInRole(renweb.Constants.ROLE_ADMIN))
{
      <a href="@Url.Action("Detail","Elmah",new{id=@Session["ElmahId"]})">Error details</a>
}