A sample class to clean the input into web pages [from petshop]

using System;

using System.Text;

namespace PetShop.Web.WebComponents

{

/**//// <summary>

/// A sample class to clean the input into web pages

/// </summary>

public sealed class CleanString {

public static string InputText(string inputString, int maxLength) {

StringBuilder retVal = new StringBuilder();

// check incoming parameters for null or blank string

if ((inputString != null) && (inputString != String.Empty)) {

inputString = inputString.Trim();

//chop the string incase the client-side max length

//fields are bypassed to prevent buffer over-runs

if (inputString.Length > maxLength)

inputString = inputString.Substring(0, maxLength);

//convert some harmful symbols incase the regular

//expression validators are changed

for (int i = 0; i < inputString.Length; i++) {

switch (inputString[i]) {

case '"':

retVal.Append("&quot;");

break;

case '<':

retVal.Append("&lt;");

break;

case '>':

retVal.Append("&gt;");

break;

default:

retVal.Append(inputString[i]);

break;

}

}

// Replace single quotes with white space

retVal.Replace("'", " ");

}

return retVal.ToString();

}

}

}

 

 

 

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