XPathCompileException.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / XmlUtils / System / Xml / Xsl / XPath / XPathCompileException.cs / 1305376 / XPathCompileException.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// [....] 
//-----------------------------------------------------------------------------
 
using System.Runtime.Serialization; 
using System.Security.Permissions;
using System.Text; 

namespace System.Xml.Xsl.XPath {
    [Serializable]
    internal class XPathCompileException : XslLoadException { 
        public string  queryString;
        public int     startChar; 
        public int     endChar; 

        protected XPathCompileException(SerializationInfo info, StreamingContext context) 
            : base(info, context)
        {
            queryString = (string)info.GetValue("QueryString", typeof(string));
            startChar   = (int)   info.GetValue("StartChar"  , typeof(int   )); 
            endChar     = (int)   info.GetValue("EndChar"    , typeof(int   ));
        } 
 
        [SecurityPermissionAttribute(SecurityAction.LinkDemand, SerializationFormatter = true)]
        public override void GetObjectData(SerializationInfo info, StreamingContext context) { 
            base.GetObjectData(info, context);
            info.AddValue("QueryString", queryString);
            info.AddValue("StartChar"  , startChar);
            info.AddValue("EndChar"    , endChar); 
        }
 
        internal XPathCompileException(string queryString, int startChar, int endChar, string resId, params string[] args) 
            : base(resId, args)
        { 
            this.queryString = queryString;
            this.startChar   = startChar;
            this.endChar     = endChar;
        } 

        internal XPathCompileException(string resId, params string[] args) 
            : base(resId, args) {} // queryString will be set later 

        private enum TrimType { 
            Left,
            Right,
            Middle,
        } 

        // This function is used to prevent long quotations in error messages, SQLBUDT 222626 
        private static void AppendTrimmed(StringBuilder sb, string value, int startIndex, int count, TrimType trimType) { 
            const int    TrimSize   = 32;
            const string TrimMarker = "..."; 

            if (count <= TrimSize) {
                sb.Append(value, startIndex, count);
            } else { 
                switch (trimType) {
                case TrimType.Left: 
                    sb.Append(TrimMarker); 
                    sb.Append(value, startIndex + count - TrimSize, TrimSize);
                    break; 
                case TrimType.Right:
                    sb.Append(value, startIndex, TrimSize);
                    sb.Append(TrimMarker);
                    break; 
                case TrimType.Middle:
                    sb.Append(value, startIndex, TrimSize / 2); 
                    sb.Append(TrimMarker); 
                    sb.Append(value, startIndex + count - TrimSize / 2, TrimSize / 2);
                    break; 
                }
            }
        }
 
        internal string MarkOutError() {
            if (queryString == null || queryString.Trim(' ').Length == 0) { 
                return null; 
            }
 
            int len = endChar - startChar;
            StringBuilder sb = new StringBuilder();

            AppendTrimmed(sb, queryString, 0, startChar, TrimType.Left); 
            if (len > 0) {
                sb.Append(" -->"); 
                AppendTrimmed(sb, queryString, startChar, len, TrimType.Middle); 
            }
 
            sb.Append("<-- ");
            AppendTrimmed(sb, queryString, endChar, queryString.Length - endChar, TrimType.Right);

            return sb.ToString(); 
        }
 
        internal override string FormatDetailedMessage() { 
            string message = Message;
            string error = MarkOutError(); 

            if (error != null && error.Length > 0) {
                if (message.Length > 0) {
                    message += Environment.NewLine; 
                }
                message += error; 
            } 
            return message;
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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