处理字符串中的换行，将textarea中的带有换行的字符串变为逗号分隔的写法

 _setMultipleInputValues: function (param) {
             //Maybe need to modify here for the new parameter
             //add a method to set input values from textarea
             if (param.Name == "AddedParameter1") {
                 bindingElement = true;
                 var textareaValue = "";
                 textareaValue = $("#" + param.Name + "_textarea").val();
                 var c;
                 for (var i = 0; i < textareaValue.length; i++)
                 {
                     c = textareaValue.substr(i, 1);
                     if (c == "\n")
                     {
                         textareaValue = textareaValue.replace("\n", ",");
                     }
                 }
                 $("#" + param.Name + "_fore").val(textareaValue.substr(0, textareaValue.length - 1));
             }
             else {
                 var showValue = "";
                 var hiddenValue = "";
                 $("." + param.Name + "_DropDown_CB").each(function () {
                     if (this.checked && this.value !== "Select All") {
                         showValue += $("[name='" + param.Name + "_DropDown_" + this.value + "_lable']").html() + ",";
                         hiddenValue += this.value + ",";
                     }
                 });
                 $("#" + param.Name + "_fore").val(showValue.substr(0, showValue.length - 1));
                 $("#" + param.Name + "_hidden").val(hiddenValue.substr(0, hiddenValue.length - 1));
             }
         },

_setMultipleInputValues

直接上代码，下面截图做说明：