RegEx match strings

Question

I have a question related to regular expressions in c#.

I want to find text between " characters. Example:

 Enum resultado = SPDialogBox.Instance.show<ACTION_ENUMs.TORNEO_SORTEAR>("Esto es una prueba");

Matches: Esto es una prueba

But, in this example

Enum resultado = SPDialogBox.Instance.show<ACTION_ENUMs.TORNEO_SORTEAR>("Esto es una prueba");
pKR_MESAPUESTOASIGNACION.CONFIGTORNEO_ID = Valid.GetInt(dr.Cells["CONFIGTORNEO_ID"].Value);

Matches: Esto es una prueba but must not match CONFIGTORNEO_ID, because it is written between square brackets ([])

In brief, I want to match string between double quote (") characters, but that string must not be written between square brackets ([]).

Here is my code:

var pattern = "\"(.*?)\"";
var matches = Regex.Matches(fullCode, pattern, RegexOptions.Multiline);

foreach (Match m in matches)
{
    Console.WriteLine(m.Groups[1]);
}

That pattern matches all string between " characters, but how can I modify the pattern to exclude those string that are written between square brackets?

-- edit ---

here is another example:

List<String> IdSorteados = new List<String>();
int TablesToSort = 0;
foreach (UltraGridRow dr in fg.hfg_Rows)
{
    if (dr.Cells["MESA_ID"].Value == DBNull.Value && dr.Cells["Puesto"].Value == DBNull.Value && !Valid.GetBoolean(dr.Cells["BELIMINADO"].Value) && (Valid.GetBoolean(dr.Cells["Seleccionado"].Value) || SortearTodo))
        TablesToSort++;
    }

The expression must not match MESA_ID ( found within Cells["MESA_ID"].Value ) nor Puesto (found within Cells["Puesto"].Value ). It also must not match ].Value == DBNull.Value && dr.Cells[ (found within ["MESA_ID"].Value == DBNull.Value && dr.Cells["Puesto"] )

I hope I have made my intent clear.

Answer 1

Simple use a negative look-behind:

(?<!\[)

Basically, only match a string when not preceded by a [. Example here, and code as follows:

String fullCode = "Enum resultado = SPDialogBox.Instance.show<ACTION_ENUMs.TORNEO_SORTEAR>(\"Esto es una prueba\");\r\n"
                + "pKR_MESAPUESTOASIGNACION.CONFIGTORNEO_ID = Valid.GetInt(dr.Cells[\"CONFIGTORNEO_ID\"].Value);";
String pattern = @"(?<!\[)\x22(.*?)\x22";
var matches = Regex.Matches(fullCode, pattern, RegexOptions.Multiline);
foreach (Match m in matches)
{
    Console.WriteLine(m.Groups[1]);
}