Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / HttpValueCollection.cs / 1 / HttpValueCollection.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* * Ordered String/String[] collection of name/value pairs * Based on NameValueCollection -- adds parsing from string, cookie collection * * Copyright (c) 2000 Microsoft Corporation */ namespace System.Web { using System.Runtime.Serialization; using System.Runtime.Serialization.Formatters; using System.Text; using System.Runtime.InteropServices; using System.Collections; using System.Collections.Specialized; using System.Globalization; using System.Web.Util; using System.Web.UI; [Serializable()] internal class HttpValueCollection : NameValueCollection { internal HttpValueCollection(): base(StringComparer.OrdinalIgnoreCase) { } #if UNUSED_CODE internal HttpValueCollection(String str) : this(str, false, false, Encoding.UTF8) { } internal HttpValueCollection(String str, bool readOnly) : this(str, readOnly, false, Encoding.UTF8) { } #endif internal HttpValueCollection(String str, bool readOnly, bool urlencoded, Encoding encoding): base(StringComparer.OrdinalIgnoreCase) { if (!String.IsNullOrEmpty(str)) FillFromString(str, urlencoded, encoding); IsReadOnly = readOnly; } internal HttpValueCollection(int capacity) : base(capacity, StringComparer.OrdinalIgnoreCase) { } #if UNUSED_CODE internal HttpValueCollection(int capacity, String str) : this(capacity, str, false, false, Encoding.UTF8) { } internal HttpValueCollection(int capacity, String str, bool readOnly) : this(capacity, str, readOnly, false, Encoding.UTF8) { } internal HttpValueCollection(int capacity, String str, bool readOnly, bool urlencoded, Encoding encoding) : base(capacity, StringComparer.OrdinalIgnoreCase) { if (!String.IsNullOrEmpty(str)) FillFromString(str, urlencoded, encoding); IsReadOnly = readOnly; } #endif protected HttpValueCollection(SerializationInfo info, StreamingContext context) : base(info, context) { } internal void MakeReadOnly() { IsReadOnly = true; } internal void MakeReadWrite() { IsReadOnly = false; } internal void FillFromString(String s) { FillFromString(s, false, null); } internal void FillFromString(String s, bool urlencoded, Encoding encoding) { int l = (s != null) ? s.Length : 0; int i = 0; while (i < l) { // find next & while noting first = on the way (and if there are more) int si = i; int ti = -1; while (i < l) { char ch = s[i]; if (ch == '=') { if (ti < 0) ti = i; } else if (ch == '&') { break; } i++; } // extract the name / value pair String name = null; String value = null; if (ti >= 0) { name = s.Substring(si, ti-si); value = s.Substring(ti+1, i-ti-1); } else { value = s.Substring(si, i-si); } // add name / value pair to the collection if (urlencoded) base.Add( HttpUtility.UrlDecode(name, encoding), HttpUtility.UrlDecode(value, encoding)); else base.Add(name, value); // trailing '&' if (i == l-1 && s[i] == '&') base.Add(null, String.Empty); i++; } } internal void FillFromEncodedBytes(byte[] bytes, Encoding encoding) { int l = (bytes != null) ? bytes.Length : 0; int i = 0; while (i < l) { // find next & while noting first = on the way (and if there are more) int si = i; int ti = -1; while (i < l) { byte b = bytes[i]; if (b == '=') { if (ti < 0) ti = i; } else if (b == '&') { break; } i++; } // extract the name / value pair String name, value; if (ti >= 0) { name = HttpUtility.UrlDecode(bytes, si, ti-si, encoding); value = HttpUtility.UrlDecode(bytes, ti+1, i-ti-1, encoding); } else { name = null; value = HttpUtility.UrlDecode(bytes, si, i-si, encoding); } // add name / value pair to the collection base.Add(name, value); // trailing '&' if (i == l-1 && bytes[i] == '&') base.Add(null, String.Empty); i++; } } internal void Add(HttpCookieCollection c) { int n = c.Count; for (int i = 0; i < n; i++) { HttpCookie cookie = c.Get(i); base.Add(cookie.Name, cookie.Value); } } internal void Reset() { base.Clear(); } public override String ToString() { return ToString(true); } internal virtual String ToString(bool urlencoded) { return ToString(urlencoded, null); } internal virtual String ToString(bool urlencoded, IDictionary excludeKeys) { int n = Count; if (n == 0) return String.Empty; StringBuilder s = new StringBuilder(); String key, keyPrefix, item; bool ignoreViewStateKeys = (excludeKeys != null && excludeKeys[Page.ViewStateFieldPrefixID] != null); for (int i = 0; i < n; i++) { key = GetKey(i); // Review: improve this... Special case hack for __VIEWSTATE# if (ignoreViewStateKeys && key != null && key.StartsWith(Page.ViewStateFieldPrefixID, StringComparison.Ordinal)) continue; if (excludeKeys != null && key != null && excludeKeys[key] != null) continue; if (urlencoded) key = HttpUtility.UrlEncodeUnicode(key); keyPrefix = (!String.IsNullOrEmpty(key)) ? (key + "=") : String.Empty; ArrayList values = (ArrayList)BaseGet(i); int numValues = (values != null) ? values.Count : 0; if (s.Length > 0) s.Append('&'); if (numValues == 1) { s.Append(keyPrefix); item = (String)values[0]; if (urlencoded) item = HttpUtility.UrlEncodeUnicode(item); s.Append(item); } else if (numValues == 0) { s.Append(keyPrefix); } else { for (int j = 0; j < numValues; j++) { if (j > 0) s.Append('&'); s.Append(keyPrefix); item = (String)values[j]; if (urlencoded) item = HttpUtility.UrlEncodeUnicode(item); s.Append(item); } } } return s.ToString(); } } }
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