我正在尝试寻找在 SharePoint 托管应用程序中存储键/值对的最佳方式(或任何有效方式)。这些对需要:
- 如果设置存在,则在启动时加载,否则使用默认值。
- 按需创建——即用户可以在 UI 中添加新设置,然后我在代码的其他地方使用该设置进行更改。例如,使用自定义文本字符串作为列表名称而不是应用的默认设置。
我试过使用 PropertyBag,但在尝试写入时遇到拒绝访问错误。
我也尝试过使用列表,但在使该技术正常工作时遇到了问题。
有没有人建议好的方法以及如何完成。如果这些是最好的方法,我很乐意重新审视我已经尝试过的技术。
请记住,此问题应仅限于与 SharePoint 托管应用程序一起使用的内容。这意味着 C# 和服务器端代码已经过时了。
最佳答案
这是我最终使用的解决方案——将设置存储在应用程序主机网络中的列表中。
它由下面看到的几个函数组成。
创 build 置列表:
Create 创建一个包含字段 Title 和 Value 的普通列表,我用它来存储设置名称和要与之关联的值。这是在文档就绪函数中调用的,以确保已创建列表,如果已经创建,它将继续并尝试从中读取。如果列表之前不存在,我调用一个函数来初始化列表中的默认变量值。
//___________________________________Create settings list________________________________________
function createSettingsList()
{
// Create a SharePoint list with the name that the user specifies.
var hostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
var hostContext = new SP.AppContextSite(currentContext, hostUrl);
var hostweb = hostContext.get_web();
var listCreationInfo = new SP.ListCreationInformation();
//title the list
listCreationInfo.set_title("PTOAppSettings");
//set the base type of the list
listCreationInfo.set_templateType(100); //generic list
listCreationInfo.set_description("A list for custom app settings. If you have uninstalled the Paid Time Off App with no intention of reinstalling, this list can be safely deleted.");
var lists = hostweb.get_lists();
//use the creation info to create the list
var newList = lists.add(listCreationInfo);
var fieldCollection = newList.get_fields();
//add extra fields (columns) to the list & any other info needed.
fieldCollection.addFieldAsXml('<Field Type="Text" DisplayName="Value" Name="Value" />', true, SP.AddFieldOptions.AddToDefaultContentType);
newList.update();
currentContext.load(fieldCollection);
currentContext.load(newList);
currentContext.executeQueryAsync(onSettingsListCreationSuccess, onSettingsListCreationFail);
}
function onSettingsListCreationSuccess(){
//All is well.
initializeSettings();
}
function onSettingsListCreationFail(sender, args) {
//alert("We didn't create the list. Here's why: " + args.get_message());
//If a list already exists, we expect the creation to fail, and instead try to read from the existing one.
getSetting("VAR_CCEmail");
}
初始化:
Initialize 为我将来可能存储的变量创建新的列表项。如果它们未被使用,我将它们的值设置为 ""或 null。
//___________________________________Initialize setting(s)________________________________________
function initializeSettings()
{
//Get info to access host web
var hostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
var hostContext = new SP.AppContextSite(currentContext, hostUrl);
var hostweb = hostContext.get_web();
//Get list in host web
var lstObject = hostweb.get_lists().getByTitle("PTOAppSettings");
//Prepare an object to add a new list item.
var listItemCreationInfo = new SP.ListItemCreationInformation();
var newItem = lstObject.addItem(listItemCreationInfo);
//Create item. You should repeat this for all the settings you want to track.
newItem.set_item('Title', "VAR_CCEmail");
newItem.set_item('Value', "");
//Write this new item to the list
newItem.update();
currentContext.executeQueryAsync(onListItemSuccess, onListItemFailure);
function onListItemSuccess() {
//Load customizations, if any exist
getSetting("VAR_CCEmail");
}
function onListItemFailure(sender, args) {
bootbox.dialog({
title: "Something went wrong!",
message: "We were unable to initialize the app settings! Here's what we know about the problem: " + args.get_message() + '\n' + args.get_stackTrace(),
buttons: {
success:{
label: "Ok"
}
}
});
}
}
设置:
Set 是一个相当简单的函数,它接受一个设置名称和一个值,并允许您更新存储在给定变量中的值。
//___________________________________Set setting________________________________________
function setSetting(setting, value){
//Get info to access host web
var hostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
var hostContext = new SP.AppContextSite(currentContext, hostUrl);
var hostweb = hostContext.get_web();
//Get list in host web
var list = hostweb.get_lists().getByTitle("PTOAppSettings");
//A caml query get the appropriate setting
var queryXml = "<View><Query><Where><Eq><FieldRef Name='Title' /><Value Type='Text'>" + setting + "</Value></Eq></Where></Query></View>"
var query = new SP.CamlQuery();
query.set_viewXml(queryXml);
var items = list.getItems(query);
currentContext.load(items);
currentContext.executeQueryAsync(onListItemSuccess, onListItemFailure);
function onListItemSuccess() {
//looking up a specific setting should only return one item in the array.
var item = items.getItemAtIndex(0);
//update the value for the item.
item.set_item("Value", value);
item.update();
}
function onListItemFailure(sender, args) {
bootbox.dialog({
title: "Something went wrong!",
message: "We were unable to set app settings! Here's what we know about the problem: " + args.get_message() + '\n' + args.get_stackTrace(),
buttons: {
success:{
label: "Ok"
}
}
});
}
}
获取:
Get 读取列表,找到您指定的设置,然后确定与该设置关联的值是 ""还是 null,或者它是否是实际值。如果它是一个实际值,我将该值写入程序用来处理该设置的全局变量。
//___________________________________Get setting________________________________________
function getSetting(setting) {
var hostUrl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
var hostContext = new SP.AppContextSite(currentContext, hostUrl);
var hostweb = hostContext.get_web();
var list = hostweb.get_lists().getByTitle("PTOAppSettings");
//A caml query to get manager name for the record where user is equal to current user.
var queryXml = "<View><Query><Where><Eq><FieldRef Name='Title' /><Value Type='Text'>" + setting + "</Value></Eq></Where></Query></View>"
var query = new SP.CamlQuery();
query.set_viewXml(queryXml);
var items = list.getItems(query);
currentContext.load(items);
currentContext.executeQueryAsync(
function() //on success.
{
//get first (and only) item.
var item = items.getItemAtIndex(0);
var value = item.get_item("Value");
//If the property is empty it hasn't been set.
if (value === "" || value === null){
//Return null to the appropriate global variable. Not all of the settings in this switch are implemented in the program yet, but may be later.
switch(setting) {
case "VAR_PaidTimeOff":
paidTimeOffListName = "";
break;
case "VAR_Contacts":
contactsListName = "";
break;
case "VAR_CCEmail":
carbonCopyEmail = "";
break;
}
}
else
{
//Return the value. Not all of the settings in this switch are implemented in the program yet, but may be later.
switch(setting) {
case "VAR_PaidTimeOff":
paidTimeOffListName = value;
break;
case "VAR_Contacts":
contactsListName = value;
break;
case "VAR_CCEmail":
carbonCopyEmail = value;
break;
}
}
},
function(sender,args){
bootbox.dialog({
title: "Something went wrong!",
message: "We were unable to get app settings! Here's what we know about the problem: " + args.get_message() + '\n' + args.get_stackTrace(),
buttons: {
success:{
label: "Ok"
}
}
});
});
}
这可以扩展到包括其他功能来执行其他特殊任务,例如,您可以制作一个“createSetting”功能,允许您即时添加新设置(我在最初的问题中提到的要求之一) .在我的例子中,初始化一组设置满足了我的需求,但其他人可能想要一种写更多的方法。
关于javascript - 存储 SharePoint 托管应用程序的属性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/24833053/