为什么TypeScript编译器会在Logger.ts中发出错误“名称m在当前作用域中不存在”，即使它能够解析Model.LogMessage定义的LogMessage.ts
这些是相关文件：
Logger.ts：
///<reference path="Utils.ts"/>
/// <reference path="../Models/LogMessage.ts"/>
/// <reference path="JqGridUtilities.ts"/>
module Utilities {
declare var $;
import m = Model;
//import jqu = Utilities;
export class Logger {
static logs: m.LogMessage[]; // how to do typed array????
logs1: m.LogMessage[];
static logsGridClass = "jqgdash_logs";
static gridName = "jqgdash";
static logsGridHeader = "Info Center";
static displayDataOnConsole(gridClass : string, gridHeader : string, theData) {
if (theData != null && theData.length > 0) {
var grid = $("#" + gridName);
if (gridClass === logsGridClass) {
if (!grid.hasClass(logsGridClass)) {
GridUtils.reconfigureGrid(gridName, gridHeader, theData);
grid.addClass(logsGridClass);
} else {
GridUtils.addDataToGrid(gridName, gridHeader, theData);
}
} else {
if (grid.hasClass(logsGridClass)) {
grid.removeClass(logsGridClass);
}
GridUtils.reconfigureGrid(this.gridName, gridHeader, theData);
}
}
}
static createErrorLogs(messages : string) : m.LogMessage[] {
if (messages == null) return [];
$.each(messages, function (i, msg) {
logs.push(this.createLogJson("error", msg));
});
return logs;
}
static logMessageToConsole (severity : string, message : string) {
this.logs.push(this.createLogJson(severity, message));
}
}
}
LogMessage.ts：
module Model {
export class LogMessage {
message: string;
timeStamp: Date;
severity: string;
constructor (severity : string, message: string, date: Date) {
this.message = message;
this.timeStamp = date;
this.severity = severity;
}
}
}
和Utils.ts：
module Utils {
declare var tut;
export var liveString = "http://" + window.location.host + '/trackutransit';
export function executeAjaxPostJsonCall(url : string, success : any ) {
return $.ajax(url,
{
type: "POST",
contentType: "application/json; charset=utf-8",
dataType: "json",
error: tut.Logger.displayAjaxError,
success : success });
}
export function getResourcePath(relativePath: string): string {
return liveString + relativePath;
}
export function isMobile(): bool {
var index = navigator.appVersion.indexOf("Mobile");
return (index > -1);
}
}
JQGridUtilities.ts在与Logger.ts相同的文件夹中定义如下：
///<reference path="Utils.ts"/>
module Utilities{
declare var jqGrid;
declare var $;
//import t = TrackuTransit;
export class GridUtils {
static instance = new GridUtils();
constructor() { }
static isUserFriendlyField(key : string) : bool {
return true;
}
// Extracts the fields from this Json object
static extractColumnsFromJsonObject(obj) : any[]{
var columns = new Array();
if (obj) {
for (var key in obj) {
if (isUserFriendlyField(key)) {
columns.push(key);
}
}
}
return columns;
}
static addDataToGrid(gridId, gridHeader, data) {
if (data != null) {
var grid = $("#" + gridId);
for (var i = 0; i < data.length; i++) {
grid.jqGrid('addRowData', i, data[i]);
}
}
}
static createColumnModels(columns) : any[]{
var model = [];
$.each(columns, function (i, column) {
if (this.isUserFriendlyField(column)) {
if (column === "icon" || column === "image") {
model.splice(0, 0, { name: column, label: ' ', width: 16, formatter: function (cellvalue, options, rowObjects) {
return "<img src='" + cellvalue + "' width='16px' height='16px'/>";
}
});
}
else if (column === "Severity") {
model.splice(0, 0, {
name: column,
label: ' ',
width: 20,
formatter: function (cellvalue, options, rowObjects) {
var imagePath = Utils.liveString + '/Content/images/' + cellvalue + '.png';
return "<img src='" + imagePath + "' width='16px' height='16px'/>";
}
});
}
else {
if (column === "display_name") {
model.splice(0, 0, { name: column, label: "name" });
} else {
model.push({ name: column, label: column, width: 70 });
}
}
}
});
return model;
}
static reconfigureGrid(gridName, gridHeader, theData) {
if (!gridName)
throw ("grid name must be specified");
if (gridHeader, theData != null && gridHeader, theData.length > 0) {
var columns = extractColumnsFromJsonObject(theData[0]);
var colsModel = createColumnModels(columns);
// todo: report unable to chain jQuery methods as bug for jqGrid
$("#" + gridName).jqGrid('GridUnload');
$("#" + gridName).jqGrid({
datatype: "local",
data: theData,
autowidth: true,
colModel: colsModel,
pager: '#pager',
rowNum: 10,
rowList: [5, 10, 20, 50],
height: 120, // constant height allows grid navigator to show, if parent div is constant height
width: '100%',
viewrecords: true,
caption: gridHeader
});
}
}
}
}
如果我在Logger.ts中删除对JqGridUtilities.ts的引用，则错误消失，但现在无法再解析GridUtils。如果我使用不同的模块名称定义GridUtils，比如jqGridUtilities而不是Utilities，我不再会收到此错误。这是为什么？
答案 0 :(得分：2)
这是我根据你的例子所做的......
看起来你要采用捆绑策略...即你要求TypeScript留下JavaScript加载到你的方式。您可以将所有脚本添加到页面中，也可以将它们捆绑到一个文件中并缩小它。
执行此操作时，您几乎可以忽略import关键字，只需使用reference注释来描述您将在运行时提供的文件。
考虑到这一点，这是您的Logger.ts文件
更改主要是缺少import语句，但我还展示了如何实例化一个类型化数组（您只需遵循= []声明。
/// <reference path="Utils.ts"/>
/// <reference path="./Models/LogMessage.ts"/>
/// <reference path="JqGridUtilities.ts"/>
module Utilities {
declare var $;
export class Logger {
static logs: Model.LogMessage[] = []; // how to do typed array? - Like this
logs1: Model.LogMessage[] = [];
static logsGridClass = "jqgdash_logs";
static gridName = "jqgdash";
static logsGridHeader = "Info Center";
static displayDataOnConsole(gridClass: string, gridHeader: string, theData) {
if (theData != null && theData.length > 0) {
var grid = $("#" + gridName);
if (gridClass === logsGridClass) {
if (!grid.hasClass(logsGridClass)) {
GridUtils.reconfigureGrid(gridName, gridHeader, theData);
grid.addClass(logsGridClass);
} else {
GridUtils.addDataToGrid(gridName, gridHeader, theData);
}
} else {
if (grid.hasClass(logsGridClass)) {
grid.removeClass(logsGridClass);
}
GridUtils.reconfigureGrid(this.gridName, gridHeader, theData);
}
}
}
static createErrorLogs(messages: string): m.LogMessage[] {
if (messages == null) return [];
$.each(messages, function (i, msg) {
logs.push(this.createLogJson("error", msg));
});
return logs;
}
static logMessageToConsole(severity: string, message: string) {
this.logs.push(this.createLogJson(severity, message));
}
}
}