Sometimes we need to get additional keyFound variable to know if ResourceKey does not exist or exists but empty value

DNN Platform/Library/Services/Localization/ILocalizationProvider.cs

@@ -1,13 +1,13 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information
-
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information
+
 namespace DotNetNuke.Services.Localization
 {
     using System.Collections.Generic;
-
+
     using DotNetNuke.Entities.Portals;
-
+
     /// <summary>
     /// Do not implement.  This interface is only implemented by the DotNetNuke core framework. Outside the framework it should used as a type and for unit test purposes only.
     /// There is no guarantee that this interface will not change.
@@ -22,6 +22,8 @@ public interface ILocalizationProvider
 
         string GetString(string key, string resourceFileRoot, string language, PortalSettings portalSettings, bool disableShowMissingKeys);
 
+        string GetString(string key, string resourceFileRoot, string language, PortalSettings portalSettings, bool disableShowMissingKeys, out bool keyFound);
+
         /// <summary>Saves a string to a resource file.</summary>
         /// <param name="key">The key to save (e.g. "MyWidget.Text").</param>
         /// <param name="value">The text value for the key.</param>

DNN Platform/Library/Services/Localization/Localization.cs

@@ -780,6 +780,20 @@ public static string GetString(string key, string resourceFileRoot, PortalSettin
             return LocalizationProvider.Instance.GetString(key, resourceFileRoot, language, portalSettings, disableShowMissingKeys);
         }
 
+        /// <overloads>One of six overloads.</overloads>
+        /// <summary>GetString gets the localized string corresponding to the <paramref name="key"/>.</summary>
+        /// <param name="key">The resource key to find.</param>
+        /// <param name="resourceFileRoot">The Local Resource root.</param>
+        /// <param name="portalSettings">The current portals Portal Settings.</param>
+        /// <param name="language">A specific language to lookup the string.</param>
+        /// <param name="disableShowMissingKeys">Disables the show missing keys flag.</param>
+        /// <param name="keyFound">Returns whether a ResourceKey exists in the ResourceFile.</param>
+        /// <returns>The localized Text.</returns>
+        public static string GetString(string key, string resourceFileRoot, PortalSettings portalSettings, string language, bool disableShowMissingKeys, out bool keyFound)
+        {
+            return LocalizationProvider.Instance.GetString(key, resourceFileRoot, language, portalSettings, disableShowMissingKeys, out keyFound);
+        }
+
         /// <summary>GetStringUrl gets the localized string corresponding to the <paramref name="key"/>.</summary>
         /// <param name="key">The resource key to find.</param>
         /// <param name="resourceFileRoot">The Local Resource root.</param>

DNN Platform/Library/Services/Localization/LocalizationProvider.cs

@@ -52,6 +52,12 @@ public string GetString(string key, string resourceFileRoot, string language, Po
 
         /// <inheritdoc/>
         public string GetString(string key, string resourceFileRoot, string language, PortalSettings portalSettings, bool disableShowMissingKeys)
+        {
+            return this.GetString(key, resourceFileRoot, language, portalSettings, disableShowMissingKeys, out _);
+        }
+
+        /// <inheritdoc/>
+        public string GetString(string key, string resourceFileRoot, string language, PortalSettings portalSettings, bool disableShowMissingKeys, out bool keyFound)
         {
             // make the default translation property ".Text"
             if (key.IndexOf(".", StringComparison.Ordinal) < 1)
@@ -60,7 +66,7 @@ public string GetString(string key, string resourceFileRoot, string language, Po
             }
 
             string resourceValue = Null.NullString;
-            bool keyFound = TryGetStringInternal(key, language, resourceFileRoot, portalSettings, ref resourceValue);
+            keyFound = TryGetStringInternal(key, language, resourceFileRoot, portalSettings, ref resourceValue);
 
             // If the key can't be found then it doesn't exist in the Localization Resources
             if (Localization.ShowMissingKeys && !disableShowMissingKeys)