ActiveReports 15 .NET Edition
ActiveReports 15 User Guide / Preview Reports / Viewing Reports from Different Domains using CORS
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    Viewing Reports from Different Domains using CORS
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    Cross-Origin Resource Sharing is a technology for the web that provides async web operations to directly access reports from different domains. CORS works by adding a special header to responses from a server to the client. If a response contains the Access-Control-Allow-Origin header, then you can directly access the reports from another domain.

    Cross-Origin Resource Sharing

    The following viewers require CORS:

    1. JSViewer
    2. HTMLViewer (WebViewer control)
    3. RawHTML (WebViewer control)

    The following steps describe how to access reports from different domain using CORS.

    1. Add Global Application Class file (Global.asax) in your application on the service side.
    2. Open the Global.asax.cs file, and add the following code to access reports using cross websites.
      Paste inside the Global.asax.cs
      Copy Code
       protected void Application_BeginRequest(object sender, EventArgs e)
      HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*");
      if (HttpContext.Current.Request.HttpMethod == "OPTIONS")
      "GET, POST, OPTIONS");
      "Content-Type, Accept");
      Paste inside the Global.asax.vb
      Copy Code
      Sub Application_BeginRequest(ByVal sender As Object, ByVal e As EventArgs)
      HttpContext.Current.Response.AddHeader("Access-Control-Allow-Origin", "*")
      If HttpContext.Current.Request.HttpMethod = "OPTIONS" Then
      "Content-Type, Accept")
      End If
      End Sub


      • If you get error 404 or 500 on the report preview, please make sure that your browser supports CORS.

    See Also