75 lines
3.3 KiB
C#
75 lines
3.3 KiB
C#
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//------------------------------------------------------------------------------
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// <copyright file="ControlUtil.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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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Web.Resources;
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using System.Web.UI;
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namespace System.Web.UI {
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internal class ControlUtil {
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internal static Control FindTargetControl(string controlID, Control control, bool searchNamingContainers) {
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Control foundControl;
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if (searchNamingContainers) {
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Control currentContainer;
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foundControl = null;
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// DevDiv 73305: Do not assume starting control is not a naming container.
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if (control is INamingContainer) {
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currentContainer = control;
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}
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else {
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currentContainer = control.NamingContainer;
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}
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do {
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foundControl = currentContainer.FindControl(controlID);
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currentContainer = currentContainer.NamingContainer;
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}
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while (foundControl == null && currentContainer != null);
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}
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else {
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foundControl = control.FindControl(controlID);
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}
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return foundControl;
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}
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internal static bool IsBuiltInHiddenField(string hiddenFieldName) {
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// Returns true is the field name represents a hidden field generated
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// by ASP.NET's core runtime. This includes fields such as ViewState and
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// EventValidation, but not ones generated by specific controls such as
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// TreeView and WebParts.
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// If the field is less than two chars long it's not built-in. (Perf)
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if (hiddenFieldName.Length <= 2) {
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return false;
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}
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// If it doesn't start with two underscores, it's not built-in. (Perf)
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if (hiddenFieldName[0] != '_' ||
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hiddenFieldName[1] != '_') {
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return false;
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}
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// Examine list of built-in ASP.NET fields. The list was created by examining
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// the ASP.NET source code for hidden field registration and rendering.
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// We exclude __VIEWSTATEENCRYPTED and __VIEWSTATEFIELDCOUNT from the list
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// since they're covered by the general __VIEWSTATE part.
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return
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hiddenFieldName.StartsWith("__VIEWSTATE", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__EVENTVALIDATION", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__LASTFOCUS", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__SCROLLPOSITIONX", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__SCROLLPOSITIONY", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__EVENTTARGET", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__EVENTARGUMENT", StringComparison.Ordinal) ||
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String.Equals(hiddenFieldName, "__PREVIOUSPAGE", StringComparison.Ordinal);
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}
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}
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}
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