Problem using AJAX with IE7 beta - Rendering problem in Dropdown ::
Dec 6, 2006 Problem using AJAX with IE7 beta - Rendering problem in Dropdown list items request.send(null);//Send the request with a null body.
http://social.msdn.microsoft.com/Forums/en-US/iewebdevelopment/thread/497261bb-5f78-48ce-ac9e-2c957ae2081bHOME |
Hello Ext community,
My problem:
I have a tree.on('beforenodedrop',..... event (see below) and in this function i do a ajax request:
The problem is that the variable check get the responseText after a short delay, but I need the response instantly. Is it possible to code a synchronous request or solve the problem in
another way?
tree.on('beforenodedrop', function(e){
var s = e.data.selections, r = ;
var z = e.target.attributes.id;
for(var i = 0, len = s.length; i < len; i++){
var User = s[i].data['sUsername']; // s[i] is a Record from the grid
var UserID = s[i].data['nUseID'];
var ProID = z;
//var CheckUserProject = new Ext.data.Connection();
if(FRight.form.isValid())
{
Ext.Ajax.request({
url: 'test4.php',
method: 'POST',
async: true,
params:
{
'nProID' : ProID,
'nUseID' : UserID
},
});
Ext.Ajax.on('requestcomplete', function(conn, response, object)
{
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check = response.responseText;
});
// alert (check);
if(check == 'ok' ){ // <-- filter duplicates
r.push(new Ext.tree.TreeNode({ // build array of TreeNodes to add
id: UserID,
allowDrop:false,
text: User
}));
}
else
{
Ext.MessageBox.alert('Error', User+' already in project');
}
}
else
{
e.cancel;
Ext.MessageBox.alert('Error', 'You have to select a Right for '+User+'');
}
}
e.dropNode = r // return the new nodes to the Tree DD
e.cancel = r.length < 1; // cancel if all nodes were duplicates
},{stopPropagation: true, preventDefault: true});
so long cooky89
I don't think you're going about it the right way. Why are you making an Ajax request on each iteration of your loop?
Can you explain what you're trying to do?
Thanks for your answer evant =)
I have already tried that, it works perfect, but then i have another problem. I get no nodedrop and i can't find the reason :/
tree.on('beforenodedrop', function(e){
var s = e.data.selections, r = ;
var z = e.target.attributes.id;
for(var i = 0, len = s.length; i < len; i++){
var User = s[i].data['sUsername']; // s[i] is a Record from the grid
var UserID = s[i].data['nUseID'];
var ProID = z;
//var CheckUserProject = new Ext.data.Connection();
if(FRight.form.isValid())
{
Ext.Ajax.request({
url: 'test4.php',
method: 'POST',
async: true,
params:
{
'nProID' : ProID,
'nUseID' : UserID
},
success: function(response, options)
{
var check = response.responseText;
if (check)
{
if(check == 'ok' ){ // <-- filter duplicates
r.push(new Ext.tree.TreeNode({ // build array of TreeNodes to add
id: UserID,
allowDrop:false,
text: User
}));
}
else
{
Ext.MessageBox.alert('Error', User+' already in project');
}
}
}
});
/* Ext.Ajax.on('requestcomplete', function(conn, response, object)
{
check = response.responseText;
});*/
// alert (check);
}
else
{
e.cancel;
Ext.MessageBox.alert('Error', 'You have to select a Right for '+User+'');
}
}
e.dropNode = r // return the new nodes to the Tree DD
e.cancel = r.length < 1; // cancel if all nodes were duplicates
}
so long cooky89
Indeed :( (On a LAN I hope)
Hello again,
ok i'll try to explain it:
I will realise a grid to tree drag & drop (Users into projects). and everytime a grid row (user) is dropped on a treenode (project) a db connection should check if this user is already in the project. I will realise this db check with an ajax.request. I send the user id and the project id to test4.php and do there a sql query. if there are more results than 0 the ajax response is fail, else the response is ok
I hope you know what i mean ^^
thanks for your help
cooky89
Ah I see,
but i think there is no other possibility for me. I'll try it online and hope that the response time is not to long
thanks a lot =)
so long cooky
You can't have the request back instantaneously (would be nice though ;)).
You need to use a callback method the request:
Ext.Ajax.request(
{
url: 'test4.php',
method: 'POST',
params: { nProID : ProID, nUseID: UserID},
scope: this,
success: function(response, options)
{
var check = response.responseText;
if (check)
//do your processing here
}
}
);
can you explain me what do you mean with..
Does this plugin only works on lan?
@cooky89 - Yes, localXHR will work just fine in either configuration. What Jeff and I are driving at is that - your users are in for potentially 'bumby ride' during the 'drop' phase.
Every synchronous Ajax call you make blocks browser script execution until a response is received from the server (your group-membership validation) and the time it takes to get a response could be lengthy if it were not serviced by a server located on a local LAN segment.
IOW: Using a synchronous call, Net latency + serverload will dictate what that final mouse drop looks like to a user. You should really try to avoid them if at all possible.
thanks para for your answer but thats not what i'm searching for.
hendricd thank you very much, thats exactly what i'v searched =)
so long cooky89
Bummer for your users, cooky89.
Hello again :)
can you explain me what do you mean with
Bummer for your users, cooky89
and
Indeed (On a LAN I hope)
Does this plugin only works on lan?
so long cooky89
Although less secure, you may want to just preload the users into the nodes. This way all you have to do is say something like e.target.attributes.users.contains('e.dropNode.tex t');
if you stored the users in a decent data structure.
If you feel you need synchronous AJAx support, try this. (http://extjs.com/forum/showthread.php?p=52350#post52350)
Just add async:false to your Ajax request options.
thanks para for your answer but thats not what i'm searching for.
hendricd thank you very much, thats exactly what i'v searched =)
so long cooky89
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ajax request problem