SAP Crystal Reports Viewer does not display in browser

Question

I own a ASP.NET web project with framework 4.5. Is installed and implemented an SAP report for VS2012 Crystal Reports Developer.

Making in Local report, it works correct

Answer 1

For those of us running migrated projects from .Net 4.0 or lower to 4.5+ I have made an observation. It seems if your page that contains the viewer is in a subdirectory then the image urls are being generated relative to that page and not to the root of the web application. E.g if your page is /gl/accounts.aspx then the image may be /gl/crystalimagehandler.aspx etc A quick way to fix this is to change your handler mapping to a wildcard ending in crystalimagehandler.aspx or put the following code in Global.asax

protected void Application_BeginRequest(object sender, EventArgs e)
        {
            var p = Request.Path.ToLower().Trim();
            if (p.EndsWith("/crystalimagehandler.aspx") && p!= "/crystalimagehandler.aspx")
            {
                var fullPath=Request.Url.AbsoluteUri.ToLower();
                var index = fullPath.IndexOf("/crystalimagehandler.aspx");
                Response.Redirect(fullPath.Substring(index));
            }
        }