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