Error executing template "Designs/Rapido/_parsed/SignatureSave.parsed.cshtml"
System.ArgumentNullException: Value cannot be null.
Parameter name: s
   at System.Convert.FromBase64String(String s)
   at CompiledRazorTemplates.Dynamic.RazorEngine_7e4f50a1999443b39ce9c106f463cf3f.Execute() in D:\Dynamicweb.net\Solutions\Dynamicweb\Masai.cloud.dynamicweb-cms.com\Files\Templates\Designs\Rapido\_parsed\SignatureSave.parsed.cshtml:line 12
   at RazorEngine.Templating.TemplateBase.RazorEngine.Templating.ITemplate.Run(ExecuteContext context, TextWriter reader)
   at RazorEngine.Templating.RazorEngineService.RunCompile(ITemplateKey key, TextWriter writer, Type modelType, Object model, DynamicViewBag viewBag)
   at RazorEngine.Templating.RazorEngineServiceExtensions.<>c__DisplayClass16_0.b__0(TextWriter writer)
   at RazorEngine.Templating.RazorEngineServiceExtensions.WithWriter(Action`1 withWriter)
   at Dynamicweb.Rendering.Template.RenderRazorTemplate()


  1	@inherits Dynamicweb.Rendering.ViewModelTemplate<Dynamicweb.Frontend.PageViewModel>
  2	@using System.Drawing
  3	@using System.Web
  4	@using System.IO
  5	
  6	@{
  7	    Dynamicweb.Context.Current.Response.ContentType = "application/json";
  8	
  9	    string base64 = Dynamicweb.Context.Current.Request["signature"];
 10	    string fileName = Dynamicweb.Context.Current.Request["fileName"] + ".png";
 11	
 12	    byte[] data = Convert.FromBase64String(base64);
 13	    string pathToSave = HttpContext.Current.Server.MapPath("Files") + "\\Images\\signatures\\" + fileName;
 14	    using (var stream = new MemoryStream(data, 0, data.Length))
 15	    {
 16	        Image image = Image.FromStream(stream);
 17	        image.Save(pathToSave);
 18	    }
 19	
 20	    <text>{"result": "/Signatures/@fileName"}</text>
 21	
 22	    @Model.Placeholder("dwcontent", "content", "default:true;sort:1")
 23	}