added TempDataHelper

Author: adamfoneil

GridEditor.RazorPages/TempDataHelper.cs

@@ -0,0 +1,32 @@
+using Microsoft.AspNetCore.Mvc.ViewFeatures;
+using System;
+
+namespace GridEditor.RazorPages
+{
+    public static class TempDataHelper
+    {
+        public static void SetSuccessMessage(this ITempDataDictionary tempData, string message)
+        {
+            tempData.Remove(AlertCss.Success);
+            if (string.IsNullOrEmpty(message)) return;
+            tempData.Add(AlertCss.Success, message);
+        }
+
+        public static void SetErrorMessage(this ITempDataDictionary tempData, string message)
+        {
+            tempData.Remove(AlertCss.Error);
+            tempData.Add(AlertCss.Error, message);
+        }
+
+        public static void SetErrorMessage(this ITempDataDictionary tempData, Exception exception)
+        {
+            tempData.Remove(AlertCss.Error);
+            tempData.Add(AlertCss.Error, exception.Message);
+        }
+
+        public static void ClearErrorMessage(this ITempDataDictionary tempData)
+        {
+            tempData.Remove(AlertCss.Error);
+        }
+    }
+}