[Mono-list] Creating file name from string

[Ivan N. Zlatev]

On Sat, Jun 28, 2008 at 7:40 PM, Andrus <kobruleht2 at hot.ee> wrote:
> I need to create legal file name form any string so that PDF and other
> viewers show nice title.
>
> This code should create legal file name in every platform supported by MONO
> and .NET
>
> I created method LegalFileName() for this which uses 2 helper methods.
> It replaces <>\/:?*"| characters in name.
>
> Is this best solution ?
> Will LegalFineName return legal file name for every OS ?
>

It will depend not on the OS, but on the file system.

If you are targeting .Net 2.0+ you should probably use
Path.GetInvalidFileNameChars () and/or GetInvalidPathChars () static
methods.

Cheers,
Ivan

>
>    /// <summary>
>    /// Creates valid file name for current OS
>    /// </summary>
>    /// <returns>Legal file name</returns>
>    public static string LegalFileName(string proposedFileName)
>    {
>       return ChrTran(proposedFileName, "<>\\/:?*\"|", "[]      ").Trim();
>    }
>
>    /// <summary>
>    /// Replaces each character in a character expression that matches a
> character
>    /// in a second character expression with the corresponding character in
> a
>    /// third character expression
>    /// </summary>
>    /// <example>
>    /// Console.WriteLine(ChrTran("ABCDEF", "ACE", "XYZ"));  //Displays
> XBYDZF
>    /// Console.WriteLine(ChrTran("ABCD", "ABC", "YZ")); //Displays YZD
>    /// Console.WriteLine(ChrTran("ABCDEF", "ACE", "XYZQRST")); //Displays
> XBYDZF
>    /// </example>
>    /// <param name="cSearchIn"> </param>
>    /// <param name="cSearchFor"> </param>
>    /// <param name="cReplaceWith"> </param>
>    public static string ChrTran(string cSearchIn, string cSearchFor, string
> cReplaceWith)
>    {
>        string lcRetVal = cSearchIn;
>        string cReplaceChar;
>        for (int i = 0; i < cSearchFor.Length; i++)
>        {
>            if (cReplaceWith.Length <= i)
>                cReplaceChar = "";
>            else
>                cReplaceChar = cReplaceWith[i].ToString();
>
>            lcRetVal = StrTran(lcRetVal, cSearchFor[i].ToString(),
> cReplaceChar);
>        }
>        return lcRetVal;
>    }
>
>
>    /// <summary>
>    /// Searches one string into another string and replaces all occurences
> with
>    /// a third string.
>    /// <pre>
>    /// Example:
>    /// StrTran("Joe Doe", "o", "ak");  //returns "Jake Dake"
>    /// </pre>
>    /// </summary>
>    /// <param name="cSearchIn"> </param>
>    /// <param name="cSearchFor"> </param>
>    /// <param name="cReplaceWith"> </param>
>    public static string StrTran(string cSearchIn, string cSearchFor, string
> cReplaceWith)
>    {
>        //Create the StringBuilder
>        StringBuilder sb = new StringBuilder(cSearchIn);
>
>        //There is a bug in the replace method of the StringBuilder
>        sb.Replace(cSearchFor, cReplaceWith);
>
>        //Call the Replace() method of the StringBuilder and specify the
> string to replace with
>        return sb.Replace(cSearchFor, cReplaceWith).ToString();
>    }
>
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