C# Discussion Boards - CodeProject

Ajax slowing my search???

12-Jul-07 7:52

Hi Phil,

two ideas:

1.
the DroppedDown property manipulation should not be there at all; it is not
needed to swap frame names; if your app needs it, put it elsewhere (or
modify your method name)

2.
you might want to use SelectedItem instead of SelectedIndex; this should
even work if the selected index is different from oldIndex/newIndex;
it will fail if your ComboBox holds duplicates (not a good idea anyhow)

private static void SwapFrameNames(ComboBox cb, int oldIndex, int newIndex) {
    // remember current selection
    object sel=cb.SelectedItem;
    // unselect everything
    cb.SelectedItem=null;
    // swap
    object temp = cb.Items[newIndex];
    cb.Items[newIndex] = cb.Items[oldIndex];
    cb.Items[oldIndex] = temp;
    // restore selection if any (was null, so must search index now)
    cb.SelectedItem=sel;
}

Hope this helps.

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Chris McGlothen12-Jul-07 6:12

12-Jul-07 6:12

I wasn't sure where to put this dilemma, but here it goes.

I have a web application wrapped around a state machine workflow that allows the user to pick search parameters from one content pane and then displays the results in the parallel pand via a gridview. I've wrapped both panes in and am using ajax extenders (Calendars and Watermark) in the search pane. I also have the search parameters saved into a Dictionary object.

Unfortunately this is slowing down this portion of the application to a crawl. I'm at a loss as to what is causeing the delays, which happen both on ititial page load and when search button is clicked. I'm using some ajax extenders in other portions of the application with no detriment. I would provide code samples if you think they'll help, just ask Smile | :)

Any suggestions or leads would be much appreciated.

Thanks,

An American football fan -
Go Seahawks!

Lil Turtle

Christian Graus12-Jul-07 6:28

Christian Graus

12-Jul-07 6:28

AJAX means I'd have stuck with the ASP.NET forum ( where you've also posted this )

Perhaps your code is making too many AJAX callbacks and that is slowing it down ?

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Chris McGlothen12-Jul-07 6:36

12-Jul-07 6:36

I was maybe thinking that the ajax may have been slowing down the Dictionary of search parameters, the search inputs first try and get any previous parameters when the page is initialized.

Sorry for cross posting, I was just trying to cover my bases.

Thanks for the response, I'll look into it. Big Grin | :-D

An American football fan -
Go Seahawks!

Lil Turtle

Larantz12-Jul-07 12:09

Larantz

12-Jul-07 12:09

How do you build up the rows in your grid? Do you create an array of rows and add them all at the end, or do you add one at a time?

I've seen codes adding items to DataGridView one at a time and I think the grid does some 'OnAddedItem' handling like trying to refresh etc because when I changed it to adding arrays of data instead, the processing time was cut down to 1/3d.

-Larantz

for those about to code, we salute you
http://www.tellus-software.com

Chris McGlothen12-Jul-07 12:57

12-Jul-07 12:57

Larantz wrote:
How do you build up the rows in your grid?

I retrieve a Data Set from a database table via NetTiers.

How did you handle populating the GridView? Using the DataBound to create array, then ItemCreated?

Thanks for the insight though.

An American football fan -
Go Seahawks!

Lil Turtle

Steve Echols12-Jul-07 15:32

Steve Echols

12-Jul-07 15:32

Could be viewstate "bloat". Are you using firefox with firebug? If so you can check out the http requests and responses in the console window and see what's being passed back and forth.

- S
50 cups of coffee and you know it's on!

Chris McGlothen13-Jul-07 6:04

13-Jul-07 6:04

I have all the AJAX extensions set to disable ViewState already, but thanks.

Steve Echols wrote:
If so you can check out the http requests and responses in the console window

Is there a way to do this in IE?

Cheers Beer | [beer]

An American football fan -
Go Seahawks!

Lil Turtle

Steve Echols13-Jul-07 6:14

Steve Echols

13-Jul-07 6:14

There's a tool called Fiddler[^], but I can't get it to work on my machine. You might have better luck though!

- S
50 cups of coffee and you know it's on!

Larantz13-Jul-07 0:21

Larantz

13-Jul-07 0:21

Chris McGlothen wrote:
I retrieve a Data Set from a database table via NetTiers.

Ok.With DataSet I don't think the row generation is an issue.

Chris McGlothen wrote:

How did you handle populating the GridView? Using the DataBound to create array, then ItemCreated?

Well in a normal case I'd use BindingList to handle the populating of the grid. The example I was refering to before was initially just building up string[] arrays with column values and then adding them to the grid. As a quickfix I just changed that into creating arrays of finished DataGridViewCells and adding the entire array to the grid. If I had the time, I'd go for a BindingList though.

Best regards!

-Larantz

for those about to code, we salute you
http://www.tellus-software.com

Chris McGlothen13-Jul-07 4:34

Help with a search & replace

13-Jul-07 4:34

Nice!

Thanks for the tip. I've not had the opportunity to try using a BindingList yet, I'll have to give it a go.

Cheers Beer | [beer]

An American football fan -
Go Seahawks!

Lil Turtle

rbuchana12-Jul-07 5:51

rbuchana

12-Jul-07 5:51

I have a text box & a property window.
The text box is read-only and displays C code. As the users change properties the C-code changes respectively. I've implemented this using Regex's replace function. However it is really really slow. Here's what I have

private void updateCCodeTextBoxWorker(int address, string name)
{
    cCodeTextBox.SuspendLayout();

    string pattern = name + @", 0x..";
    string replace = String.Format("{0}, 0x{1:X2}", name, regData[address]);
    Regex rgx = new Regex(pattern);

    cCodeTextBox.Text = rgx.Replace(cCodeTextBox.Text, replace);

    cCodeTextBox.ResumeLayout();
}

The string "name" is basically what I'm searching for and "regData[address]" is the value that's changing.

Is there a better way to do this? How can I make it faster?

Thanks,
--RB

Re: Help with a search & replace

User 665812-Jul-07 6:06

User 6658

12-Jul-07 6:06

Have you tried the RegexOptions.Compiled flag? It may help, since the search pattern will be compiled into the assembly, which yields in faster execution time

regards

modified 12-Sep-18 21:01pm.

Re: Help with a search & replace

Luc Pattyn12-Jul-07 6:12

Problem Connecting to MQ on unix from .NET application

12-Jul-07 6:12

Hi,

So for every property change, the code executes, creates a new Regex and
makes it Replace something. Regex is an expensive class by itself,
it has to either interpret your intentions, or, optionally generate compiled
code for it (more cost effective only when required over and over, not your case).

If the user types 5 characters for a property, it changes five times.
I would look for a way to run the code less frequently. Some ideas:
- let the user trigger the code by clicking a button or so (less comfortable);
- let a timer trigger the code; maybe have a scheme where the worker runs
say 3 seconds after the last change (i.e. every change starts/restarts a timer,
and only when the 3 seconds elapse is the code executed).

Hope this helps

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

unnamed00712-Jul-07 4:51

unnamed007

12-Jul-07 4:51

Hi,
Am writing an .net windows application in which i have to connect to IBM MQ on remote machine running unix to post messages. This is a tool kinda thing for an enterprise application.

this is the code am using to connect to the MQ.

Code: ( text )
MQEnvironment.Hostname = hostName;
MQEnvironment.Port = port;
MQEnvironment.Channel = "SYSTEM.DEF.SVRCONN";
MQQueueManager qm=new MQQueueManager(queueMgr);

When i try to run the application it throws an exception in
MQQueueManager qm=new MQQueueManager(queueMgr);

Exception details :- CompCode 2 Reason 2035 ..from error code lookup i learnt that its MQRC_NOT_AUTHORIZED.
read somewhere that the user's credentials under whom application is run will be supplied for authorization automatically..if thats the case how is cross platform connectivity is possible...in my case mq client is on windows and
mq server is on unix.

Do i have to specify the userid,password for unix system to override this?
If so, how? MQQueueManager Class doesnt have a constructor that accepts userid/password as a parameter and MQEnvironment doesnt have a property for userid/password..
Am using Websphere Mq 5.3 ? Is the option to specify userid/password available in the latest version 6.0?

seems MQ classes for java have options to specify userid/password but .NET classes didnt.

am pulling my hair over this for the past 3 days...please help..

String containing digit or Alphabet

t4ure4n12-Jul-07 4:33

t4ure4n

12-Jul-07 4:33

I have a variable

string input

How do i detect if variable has digit in it or an alphabet.

o O º(`'·.,(`'·., ☆,.·''),.·'')º O o°
»·'"`»* *☆ t4ure4n ☆* *«·'"`«
°o O º(,.·''(,.·'' ☆`'·.,)`'·.,)º O o°

Re: String containing digit or Alphabet

User 665812-Jul-07 4:43

User 6658

12-Jul-07 4:43

t4urean wrote:
How do i detect if variable has digit in it or an alphabet.

In terms of an exclusive or?

To check, if the string is a number:

int i = int.TryParse(input)

If it's just one digit:

int i = int.TryParse(input) and then i =< 9 && i >= 0

If it contains one or more alphabets:

bool b = Regex.IsMatch(input, "[a-zA-Z]")

regards

modified 12-Sep-18 21:01pm.

Re: String containing digit or Alphabet

Luc Pattyn12-Jul-07 4:45

Re: String containing digit or Alphabet

12-Jul-07 4:45

Hi,

you can walk the individual characters of the string:

for (int i=0; i<input.Length; i++) {
    char c=input[i];
    ... do something with c
}

or equivalently (unless you want to change c, wouldnt work here):

foreach (char c in input) {
     ... do something with c
}

and you can use one of many many methods available in String class,
such as IndexOf() and Contains()

May I suggest you at least read the MSDN documentation on String class;
or better yet work your way through a introductory C# book.

Smile | :)

Luc Pattyn

try { [Search CP Articles] [Search CP Forums] [Forum Guidelines] [My Articles] }
catch { [Google] }

Christian Graus12-Jul-07 4:53

Christian Graus

12-Jul-07 4:53

You can use regex, or iterate over the chars and use things like char.IsDigit.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

IOException Problem...

Andy Spier12-Jul-07 4:23

Andy Spier

12-Jul-07 4:23

For some reason my IOException is not being caught... if my Frame (SettingsPane) tries to go to a non-existent XAML page in my resources (in a folder), it gives me this exception but I tell it to handle it and it totally ignores it for some reason. My catch statement is there but when I attempt to load a non-existent page, I see the exception. Why isn't it being caught by my catch statement?

Another question if this can't be answered... how do I check if a resource exists in my application? If I can test the existence of the resource my app is trying to find, I wouldn't have to deal with this exception in the first place.

Here is a screenshot of what I'm dealing with here...

Screenshot

Re: IOException Problem...

Luc Pattyn12-Jul-07 4:28