選擇單選按鈕會創建一個動態下拉列表

Question

我正在嘗試創建一個下拉列表，該列表根據在單選按鈕組中所做的選擇而動態填充。 我目前有一組單選按鈕，名稱為“適用性”，可供選擇的選項包括：人員，程序，環境，交付能力，技術適航性和運營適航性。 根據選擇的選項，我希望在下拉框中填充許多選項。 我目前正在使用的代碼是：

var peList = [“Worker Type”, “Injury Type”];
var enList = [“Undefined”];
var prList = ["Facility", "Building", "Plant", "Damage Type"];
var caList = ["To Be Determined"];
var teList = ["Aircraft", "Component"];
var opList = ["Nothing at the moment"];

if (Applicability.rawValue===”People”) {
           DropDownList4.clearItems;
    for (var i = 0; i < peList.length; i++) { 
        DropDownList4.addItem(peList[i]);
}
        } else if (Applicability.rawValue===”Property”) {
           DropDownList4.clearItems;
    for (var i = 0; i < prList.length; i++) { 
        DropDownList4.addItem(prList[i]);
        }
        } else if (Applicability.rawValue===”Environment”) {
           DropDownList4.clearItems;
    for (var i = 0; i < enList.length; i++) { 
        DropDownList4.addItem(enList[i]);
        }
        } else if (Applicability.rawValue===”CapabilityToDeliver”) {
           DropDownList4.clearItems;
    for (var i = 0; i < caList.length; i++) { 
        DropDownList4.addItem(caList[i]);
        }
        } else if (Applicability.rawValue===”TechnicalAirworthiness”) {
           DropDownList4.clearItems;
    for (var i = 0; i < taList.length; i++) { 
        DropDownList4.addItem(taList[i]);
        }
        } else if (Applicability.rawValue===”OperationalAirworthiness”) {
           DropDownList4.clearItems;
    for (var i = 0; i < opList.length; i++) { 
        DropDownList4.addItem(opList[i]);}

您能幫我告訴我哪里可能出問題了嗎？ 謝謝

Answer 1

clearitems是一種方法，應稱為DropDownList4.clearItems（）;。 請注意此處代碼中缺少的括號。 另外，通過使用switch使代碼更易於維護。 例如：

var a,al,ax; // array, array length, array index
switch(Applicability.rawValue){
case 'People': a=['Worker Type', 'Injury Type'];break;
case 'Property': a=['Facility', 'Building', 'Plant', 'Damage Type'];break;
case 'Environment': a=['Undefined'];break;
case 'CapabilityToDeliver': a=['To Be Determined'];break;
case 'TechnicalAirworthiness': a=['Aircraft', 'Component'];break;
case 'OperationalAirworthiness': a=['Nothing at the moment'];break;
default:
 // put your exception handling code here.
}
DropDownList4.clearItems();
for(ax=0,al=a.length;ax<al;ax++){ 
 DropDownList4.addItem(a[ax]);
}