Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/ModelBinding/ModelBinderErrorMessageProviders.cs

@@ -0,0 +1,75 @@
+namespace System.Web.ModelBinding {
+    using System;
+    using System.Globalization;
+
+    // Provides configuration settings common to the new model binding system.
+    public static class ModelBinderErrorMessageProviders {
+
+        private static ModelBinderErrorMessageProvider _typeConversionErrorMessageProvider;
+        private static ModelBinderErrorMessageProvider _valueRequiredErrorMessageProvider;
+
+        public static ModelBinderErrorMessageProvider TypeConversionErrorMessageProvider {
+            get {
+                if (_typeConversionErrorMessageProvider == null) {
+                    _typeConversionErrorMessageProvider = DefaultTypeConversionErrorMessageProvider;
+                }
+                return _typeConversionErrorMessageProvider;
+            }
+            set {
+                _typeConversionErrorMessageProvider = value;
+            }
+        }
+
+        public static ModelBinderErrorMessageProvider ValueRequiredErrorMessageProvider {
+            get {
+                if (_valueRequiredErrorMessageProvider == null) {
+                    _valueRequiredErrorMessageProvider = DefaultValueRequiredErrorMessageProvider;
+                }
+                return _valueRequiredErrorMessageProvider;
+            }
+            set {
+                _valueRequiredErrorMessageProvider = value;
+            }
+        }
+
+        private static string DefaultTypeConversionErrorMessageProvider(ModelBindingExecutionContext modelBindingExecutionContext, ModelMetadata modelMetadata, object incomingValue) {
+            return GetResourceCommon(modelBindingExecutionContext, modelMetadata, incomingValue, GetValueInvalidResource);
+        }
+
+        private static string DefaultValueRequiredErrorMessageProvider(ModelBindingExecutionContext modelBindingExecutionContext, ModelMetadata modelMetadata, object incomingValue) {
+            return GetResourceCommon(modelBindingExecutionContext, modelMetadata, incomingValue, GetValueRequiredResource);
+        }
+
+        private static string GetResourceCommon(ModelBindingExecutionContext modelBindingExecutionContext, ModelMetadata modelMetadata, object incomingValue, Func<ModelBindingExecutionContext, string> resourceAccessor) {
+            string displayName = modelMetadata.GetDisplayName();
+            string errorMessageTemplate = resourceAccessor(modelBindingExecutionContext);
+            string errorMessage = String.Format(CultureInfo.CurrentCulture, errorMessageTemplate, incomingValue, displayName);
+            return errorMessage;
+        }
+
+        private static string GetUserResourceString(ModelBindingExecutionContext modelBindingExecutionContext, string resourceName) {
+#if UNDEF
+            return GetUserResourceString(modelBindingExecutionContext, resourceName, DefaultModelBinder.ResourceClassKey);
+#endif
+            return GetUserResourceString(modelBindingExecutionContext, resourceName, String.Empty);
+        }
+
+        // If the user specified a ResourceClassKey try to load the resource they specified.
+        // If the class key is invalid, an exception will be thrown.
+        // If the class key is valid but the resource is not found, it returns null, in which
+        // case it will fall back to the MVC default error message.
+        internal static string GetUserResourceString(ModelBindingExecutionContext modelBindingExecutionContext, string resourceName, string resourceClassKey) {
+            return (!String.IsNullOrEmpty(resourceClassKey) && (modelBindingExecutionContext != null) && (modelBindingExecutionContext.HttpContext != null))
+                ? modelBindingExecutionContext.HttpContext.GetGlobalResourceObject(resourceClassKey, resourceName, CultureInfo.CurrentUICulture) as string
+                : null;
+        }
+
+        private static string GetValueInvalidResource(ModelBindingExecutionContext modelBindingExecutionContext) {
+            return GetUserResourceString(modelBindingExecutionContext, "PropertyValueInvalid") ?? SR.GetString(SR.ModelBinderConfig_ValueInvalid);
+        }
+
+        private static string GetValueRequiredResource(ModelBindingExecutionContext modelBindingExecutionContext) {
+            return GetUserResourceString(modelBindingExecutionContext, "PropertyValueRequired") ?? SR.GetString(SR.ModelBinderConfig_ValueRequired);
+        }
+    }
+}