用js实现C#下的string.Format方法

var str = "{0}aaa,b{{0}}bb,d{{a}}dd,c{{{0}}}cc{{0}},{{{{1},aaa,{1}}}}},ccc,{1}eee,{{1}},{{2}}\"ccc\""
//var str = "{0} {1}:AAA:CCC"
var data = ["tx{1}t1", "tx{{0}}t2"];
str = StringFormat(str, data);
alert(str);

function StringFormat (str, list) {
var data = list;
var strArray = str.split("");
for (var i = 0; i < data.length; i++) {
var strReg = "(\\{+" + i + "\\}+)";
var reg = new RegExp(strReg, "g");

while (true) {
var exec = reg.exec(str);
if (null == exec)
break;

var start = exec[0].match(/{+/g);
var end = exec[0].match(/}+/g);
var findStr = exec[0].replace(/{{/g, "{").replace(/}}/g, "}");
var lastIndex = exec.index + exec[0].length;

for (var strIndex = exec.index; strIndex < lastIndex; strIndex++) {
strArray[strIndex] = "";
}

if (start[0].length % 2 > 0 &&
end[0].length % 2 > 0) {
strArray[exec.index] = findStr.replace(/{\d+}/g, data[i]);
}
else {
strArray[exec.index] = findStr;
}
}
}

str = strArray.join("");

return str;
}