Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,43 @@
+namespace System.Web.ModelBinding {
+    using System;
+
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false, AllowMultiple = false)]
+    public sealed class QueryStringAttribute : ValueProviderSourceAttribute, IUnvalidatedValueProviderSource {
+
+        private bool _validateInput = true;
+
+        public string Key {
+            get;
+            private set;
+        }
+
+        public QueryStringAttribute()
+            : this(null) {
+        }
+
+        public QueryStringAttribute(string key) {
+            Key = key;
+        }
+
+        public override IValueProvider GetValueProvider(ModelBindingExecutionContext modelBindingExecutionContext) {
+            if (modelBindingExecutionContext == null) {
+                throw new ArgumentNullException("modelBindingExecutionContext");
+            }
+
+            return new QueryStringValueProvider(modelBindingExecutionContext);
+        }
+
+        public override string GetModelName() {
+            return Key;
+        }
+
+        public bool ValidateInput {
+            get {
+                return _validateInput;
+            }
+            set {
+                _validateInput = value;
+            }
+        }
+    }
+}