From a46b86b243effe1e915e74b869e1d23b246defa5 Mon Sep 17 00:00:00 2001
From: Matthew Harris <rtpharry@hotmail.com>
Date: Thu, 29 Sep 2016 20:48:22 +0100
Subject: [PATCH] Fixes #7120 Hidden Field in Dynamic Forms causes crash
 (#7123)

Fixes #7120 - If a Hidden Field is added to a DynamicForm without a Value set then it will crash the front end because of a null value.
---
 .../Orchard.DynamicForms/Drivers/HiddenFieldElementDriver.cs  | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Orchard.Web/Modules/Orchard.DynamicForms/Drivers/HiddenFieldElementDriver.cs b/src/Orchard.Web/Modules/Orchard.DynamicForms/Drivers/HiddenFieldElementDriver.cs
index 1206b6d94..62448c847 100644
--- a/src/Orchard.Web/Modules/Orchard.DynamicForms/Drivers/HiddenFieldElementDriver.cs
+++ b/src/Orchard.Web/Modules/Orchard.DynamicForms/Drivers/HiddenFieldElementDriver.cs
@@ -36,7 +36,7 @@ namespace Orchard.DynamicForms.Drivers {
 
         protected override void OnDisplaying(HiddenField element, ElementDisplayingContext context) {
             context.ElementShape.ProcessedName = _tokenizer.Replace(element.Name, context.GetTokenData());
-            context.ElementShape.ProcessedValue = element.RuntimeValue;
+            context.ElementShape.ProcessedValue = element.RuntimeValue ?? string.Empty;
         }
     }
-}
\ No newline at end of file
+}