Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/QueryStringParameter.cs

@@ -0,0 +1,135 @@
+//------------------------------------------------------------------------------
+// <copyright file="QueryStringParameter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections.Specialized;
+    using System.ComponentModel;
+    using System.Data;
+
+
+
+    /// <devdoc>
+    /// Represents a Parameter that gets its value from the application's QueryString parameters.
+    /// </devdoc>
+    [
+    DefaultProperty("QueryStringField"),
+    ]
+    public class QueryStringParameter : Parameter {
+
+        /// <devdoc>
+        /// Creates an instance of the QueryStringParameter class.
+        /// </devdoc>
+        public QueryStringParameter() {
+        }
+
+
+        /// <devdoc>
+        /// Creates an instance of the QueryStringParameter class with the specified parameter name and QueryString field.
+        /// </devdoc>
+        public QueryStringParameter(string name, string queryStringField) : base(name) {
+            QueryStringField = queryStringField;
+        }
+
+
+        /// <devdoc>
+        /// Creates an instance of the QueryStringParameter class with the specified parameter name, database type,
+        /// and QueryString field.
+        /// </devdoc>
+        public QueryStringParameter(string name, DbType dbType, string queryStringField)
+            : base(name, dbType) {
+            QueryStringField = queryStringField;
+        }
+
+
+        /// <devdoc>
+        /// Creates an instance of the QueryStringParameter class with the specified parameter name, type, and QueryString field.
+        /// </devdoc>
+        public QueryStringParameter(string name, TypeCode type, string queryStringField) : base(name, type) {
+            QueryStringField = queryStringField;
+        }
+
+
+        /// <devdoc>
+        /// Used to clone a parameter.
+        /// </devdoc>
+        protected QueryStringParameter(QueryStringParameter original) : base(original) {
+            QueryStringField = original.QueryStringField;
+            ValidateInput = original.ValidateInput;
+        }
+
+
+
+        /// <devdoc>
+        /// The name of the QueryString parameter to get the value from.
+        /// </devdoc>
+        [
+        DefaultValue(""),
+        WebCategory("Parameter"),
+        WebSysDescription(SR.QueryStringParameter_QueryStringField),
+        ]
+        public string QueryStringField {
+            get {
+                object o = ViewState["QueryStringField"];
+                if (o == null)
+                    return String.Empty;
+                return (string)o;
+            }
+            set {
+                if (QueryStringField != value) {
+                    ViewState["QueryStringField"] = value;
+                    OnParameterChanged();
+                }
+            }
+        }
+
+
+        /// <devdoc>
+        /// Creates a new QueryStringParameter that is a copy of this QueryStringParameter.
+        /// </devdoc>
+        protected override Parameter Clone() {
+            return new QueryStringParameter(this);
+        }
+
+
+        /// <devdoc>
+        /// Returns the updated value of the parameter.
+        /// </devdoc>
+        protected internal override object Evaluate(HttpContext context, Control control) {
+            if (context == null || context.Request == null) {
+                return null;
+            }
+
+            NameValueCollection queryStringCollection = ValidateInput ? context.Request.QueryString : context.Request.Unvalidated.QueryString;
+            return queryStringCollection[QueryStringField];
+        }
+
+        /// <summary>
+        /// Determines whether the parameter's value is being validated or not.
+        /// </summary>
+        [
+        WebCategory("Behavior"),
+        WebSysDescription(SR.Parameter_ValidateInput),
+        DefaultValue(true)
+        ]
+        public bool ValidateInput {
+            get {
+                object o = ViewState["ValidateInput"];
+                if (o == null)
+                    return true;
+                return (bool)o;
+            }
+            set {
+                if (ValidateInput != value) {
+                    ViewState["ValidateInput"] = value;
+                    OnParameterChanged();
+                }
+            }
+        }
+    }
+}
+