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我需要做PreSaveAction内部验证，如果一个字段（demofield）等于肯定的，如果是的话称一个名为ViewItem和ViewItem检查功能，如果值存在与否并更改值结果“为”是“或”否“;结果也是一个全局变量。但由于某种原因，当我在“成功”函数内改变“结果”的值时，它并不会改变全局变量“结果”。我在做什么错误或者有什么其他方法可以使验证发生？的Javascript的Sharepoint Presaveaction总是让VAR未定义
var result; // This is always undefined
function ViewItem()
{
var context = new SP.ClientContext.get_current();
var web = context.get_web();
var list = web.get_lists().getByTitle('demoTrainingRoom2');
var query = SP.CamlQuery.createAllItemsQuery();
allItems = list.getItems(query);
context.load(allItems, 'Include(Title, EventDate, time2)');
context.executeQueryAsync(Function.createDelegate(this, this.success), Function.createDelegate(this, this.failed));
}
function success() {
var currentTitle = SPUtility.GetSPFieldByInternalName('EventDate').GetValue();
for(var i = 0; i < this.allItems.get_count(); i++){
\t \t \t \t \t var item = this.allItems.get_item(i);
\t \t \t \t \t console.log(item.get_item('time2') + ' - ' + currentTitle);
\t \t \t \t \t
if (currentTitle == item.get_item('time2')){
this.result = "Yes"; //// here is where i change the value of result
\t \t \t \t \t alert('There is an event with the same Start Date on DemoTrainingRoom2' + ' ' + item.get_item('time2') + ' - ' + currentTitle + ' ' + result);
return true; // or item
\t \t \t \t }
\t \t \t \t }
\t \t \t \t
this.result = "No"; // here is where i change the value of result
\t \t \t \t alert("No event yet");
\t \t \t \t return false;
\t \t \t \t
\t \t \t \t }
\t \t \t \t
function failed(sender, args) {
alert("failed. Message:" + args.get_message());
}
function PreSaveAction() {
var time = SPUtility.GetSPFieldByInternalName('EventDate').GetValue();
alert(time + " Current Start Time ");
if(SPUtility.GetSPField('demoField').GetValue() == "no")
{
alert('No need for validation');
return true;
}
else if(SPUtility.GetSPField('demoField').GetValue() == "yes")
{
ViewItem();
if(result == "Yes") // here is here i need the new value of result globlal
{
alert(result);
return false;
}
else
{
alert(result); // i always get here cuz result global is undefined
return true;
}
} \t
}UPDATE
function ViewItem(listTitle, Success, Error) {
\t var context = new SP.ClientContext.get_current();
\t var web = context.get_web();
\t var list = web.get_lists().getByTitle(listTitle);
\t var query = SP.CamlQuery.createAllItemsQuery();
\t //variable local
\t var allItems = list.getItems(query);
\t context.load(allItems, 'Include(Title, EventDate, tiempo2)');
\t context.executeQueryAsync(function(){
\t \t \t var currentTitle = SPUtility.GetSPFieldByInternalName('EventDate').GetValue();
\t \t \t var res = "No";
\t \t \t for (var i = 0; i < allItems.get_count(); i++) {
\t \t \t \t var item = allItems.get_item(i);
\t \t \t \t console.log(item.get_item('tiempo2') + ' - ' + currentTitle);
\t \t \t \t if (currentTitle == item.get_item('tiempo2')){
\t \t \t \t \t res = "Si"; // aca segun yo le cambio el valor a result
\t \t \t \t \t console.log('There is an event with the same Start Date on DemoTrainingRoom2'
\t \t \t \t \t \t + ' ' + item.get_item('tiempo2') + ' - ' + currentTitle);
\t \t //return true; // or item
\t \t }
\t \t \t }
\t \t \t return Success(res);
\t \t },
\t \t Error
\t);
}
function PreSaveAction() {
\t var time = SPUtility.GetSPFieldByInternalName('EventDate').GetValue();
\t alert(time + " Current Start Time ");
\t
\t if(SPUtility.GetSPField('demoField').GetValue() == "no") {
\t \t alert('No need for validation');
\t \t return true;
\t }
\t else if(SPUtility.GetSPField('demoField').GetValue() == "yes") {
\t \t //llamo a esta pa ver si hay items con valores duplicados
\t \t var res2 = ViewItem('demoTrainingRoom2', function(res){
\t \t \t \t console.log('Resultado: ' + res);
\t \t \t \t if(res == "Si") //deberia de entrar si result fuera Si
\t \t \t \t {
\t \t \t \t \t alert(res);
\t \t \t \t \t return false;
\t \t \t \t }
\t \t \t \t else
\t \t \t \t {
\t \t \t \t \t alert(res); //Pero siempre entra aca por que result es undefined
\t \t \t \t \t return true;
\t \t \t \t } \t \t
\t \t \t },
\t \t \t function (sender, args) {
\t \t \t \t alert("failed. Message:" + args.get_message());
\t \t \t }
\t \t);
\t \t
\t \t
\t \t return res2;
\t }
}
我更新的代码，你的意思是类似的东西？ – suizzak