Mega Code Archive
Replace string with regular expression
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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="Utils.cs" company="Collaboris Ltd.">
// Copyright (c) Collaboris Ltd. All rights Reserved.
// </copyright>
// <summary>
// The utils.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace Collaboris.DataAccess
{
#region Imports
using System;
using System.Web;
#endregion
/// <summary>
/// The utils.
/// </summary>
public class Utils
{
#region [rgn] Methods (2)
/// <summary>
/// The replace ex.
/// </summary>
/// <param name="original">
/// The original.
/// </param>
/// <param name="pattern">
/// The pattern.
/// </param>
/// <param name="replacement">
/// The replacement.
/// </param>
/// <returns>
/// The replace ex.
/// </returns>
public static string ReplaceEx(string original, string pattern, string replacement)
{
int count, position0, position1;
count = position0 = position1 = 0;
string upperString = original.ToUpper();
string upperPattern = pattern.ToUpper();
int inc = (original.Length / pattern.Length) * (replacement.Length - pattern.Length);
var chars = new char[original.Length + Math.Max(0, inc)];
while ((position1 = upperString.IndexOf(upperPattern, position0)) != -1)
{
for (int i = position0; i < position1; ++i)
{
chars[count++] = original[i];
}
for (int i = 0; i < replacement.Length; ++i)
{
chars[count++] = replacement[i];
}
position0 = position1 + pattern.Length;
}
if (position0 == 0)
{
return original;
}
for (int i = position0; i < original.Length; ++i)
{
chars[count++] = original[i];
}
return new string(chars, 0, count);
}
#endregion [rgn]
}
}
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