The function would be something like....

 <msxsl:script language="c#" implements-prefix="randomTools">
    <msxsl:assembly href="../bin/umbraco.dll"/>
    <![CDATA[
 public static string InsertCrLf(string originalString) {
string strMain = originalString;
int len = strMain.Length;        
string smallString = "";
string newString = "";
ArrayList myArray = new ArrayList();        

while (len > 80)
{
    smallString = strMain.Substring(0, 80);
    strMain = strMain.Substring(80);
    
    newString +=  smallString + "YOUR ADDED TEXT";
    len = strMain.Length;
}

newString += smallString;

return newString;
]]>
  </msxsl:script>
</xsl:stylesheet>

If I were you though I would bundle it up into an xslt extension so it's easily used next time.

Thanks a lot to the both of you!

Using both your suggestions I was able to construct this little function myself, that inserts a linebreak at the nearest space for every 75 characters:

<msxml:script implements-prefix='MyFunc' language='CSharp'>
   <![CDATA[
 public static string InsertCrLf(string s) {
string retval = "";
string[] arr = s.Split(' ');
foreach (string part in arr)
{
    if ((retval.Length - retval.LastIndexOf("\n")) + part.Length >= 75)
    {
        retval = retval + " \n" + part;
    }
    else
    {
        retval = retval + " " + part;
    }
}
return retval;
}
]]></msxml:script>

And just in case you are wondering why on earth I need this: When constructing newsletters with low spam scores, you need to insert a line break at every 76 characters or less.

/SoerenS

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