283-c# 在js文件注入自定义代码，修改原有js的逻辑（内部）

需求：
目标js中，有一个方法，要在这个方法中，插入自己的js代码，更改它的执行逻辑。
代码实现：

var InjectionJsSetting02 = new InjectionSetClass();
//注入的js文件请求url
InjectionJsSetting02.InjectionToUrl.Add("https://xxxx/js/bussiness/index.js".RegexEscape());
//插入的自定义代码
InjectionJsSetting02.InjectionData = "if(anrpttype=='' || anrpttype==undefined){anrpttype='" + anrpttype + "';}";
InjectionJsSetting02.LocationStrType = InjectionSetClass.LocationStrTypeEnum.Normal;
//注入的位置
InjectionJsSetting02.InjectionLocation = "function locat(anrpttype,ancheid,year,publicstate,antype,sqxgbz){";
InjectionJsSetting02.AllowInjectionMaxTimes = int.MaxValue;
//在匹配注入位置之后插入注入的代码
InjectionJsSetting02.InjectionLocationMode = InjectionSetClass.InjectionLocationModeEnum.AfterTheLocationInsert;
br.InjectionSettings.Add(InjectionJsSetting02);

说明：
原有代码：

function locat(anrpttype,ancheid,year,publicstate,antype,sqxgbz){
    //.....
}

注入执行后，假定anrpttype=1

function locat(anrpttype,ancheid,year,publicstate,antype,sqxgbz){
if(anrpttype=='' || anrpttype==undefined){anrpttype='1';}
    //.....
}