Re: Using Code Behind Variable in ASPX - ASP.NET Discussion Boards

Re: ASP.NET 2.0

Christian Graus15-Jan-07 17:18

Christian Graus

15-Jan-07 17:18

www.asp.net[^]

Christian Graus - C++ MVP

'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert

Re: ASP.NET 2.0

Rahithi15-Jan-07 17:58

Rahithi

15-Jan-07 17:58

thanks alot. really very good site. now i am watching the vedios on .NET 2.0.

thanks,
Rahi

If you look at what you do not have in life, you don't have anything,
If you look at what you have in life, you have everything... "

Re: ASP.NET 2.0

varshavmane15-Jan-07 17:19

varshavmane

15-Jan-07 17:19

Well there are many sites:

http://www.gridviewguy.com/Articles.aspx
www.w3school.com
and many others....

Re: ASP.NET 2.0

Rahithi16-Jan-07 7:48

Rahithi

16-Jan-07 7:48

Thanks alot

rahi

If you look at what you do not have in life, you don't have anything,
If you look at what you have in life, you have everything... "

Using Code Behind Variable in ASPX

achimera15-Jan-07 12:14

achimera

15-Jan-07 12:14

Hello,

I have an ASPX file with this.

Default.aspx:

<asp:SqlDataSource ... >
    <SelectParameters>
        <asp:QueryStringParameter DefaultValue="<font color=FF0000>25</font>" Name="PageSize" QueryStringField="PageSize" Type="Int32" />
    </SelectParameters>
</asp:SqlDataSource>

But I would like to replace it with something like this.

Default.aspx:

<asp:SqlDataSource ... >
    <SelectParameters>
        <asp:QueryStringParameter DefaultValue="<font color=FF0000><%= PageSize %></font>" Name="PageSize" QueryStringField="PageSize" Type="Int32" />
    </SelectParameters>
</asp:SqlDataSource>

Default.aspx.cs:

public partial class Default : System.Web.UI.Page
{
    public Int32 <font color=FF0000>PageSize = 25</font>;
    ...
}

The key point being, that I want to use a variable (PageSize) from the code behind class as a parameter to the SqlDataSource control. But it doesn't work. Does anyone know what I'm doing wrong?

Thanks for any help!

Re: Using Code Behind Variable in ASPX

Guffa15-Jan-07 13:10

Guffa

15-Jan-07 13:10

You can't put a script tag inside a server control.

Put an ID on the control, and set the property of the control from code behind:

<asp:QueryStringParameter ID="PageSize" Name="PageSize" QueryStringField="PageSize" Type="Int32" /><br />
<br />
PageSize.DefaultValue = 25;

---
Year happy = new Year(2007);

Re: Using Code Behind Variable in ASPX

achimera15-Jan-07 13:15

achimera

15-Jan-07 13:15

Thanks, but I get this error message:

Parser Error Message: Type 'System.Web.UI.WebControls.QueryStringParameter' does not have a public property named 'ID'.

Re: Using Code Behind Variable in ASPX

DavidNohejl17-Jan-07 1:18

DavidNohejl

17-Jan-07 1:18

Should be <asp:QueryStringParameter ~~ID="PageSize"~~ Name="PageSize" QueryStringField="PageSize" Type="Int32" /> Smile | :)

"Throughout human history, we have been dependent on machines to survive. Fate, it seems, is not without a sense of irony. " - Morpheus

Re: Using Code Behind Variable in ASPX

achimera15-Jan-07 13:26

achimera

15-Jan-07 13:26

Thanks, because of your help I figured that I can do something like this in code behind:

SqlDataSource1.SelectParameters["PageSize"].DefaultValue = Convert.ToString( PageSize );

Re: Using Code Behind Variable in ASPX

Mike Ellison15-Jan-07 13:56

Mike Ellison

15-Jan-07 13:56

It won't work as a coding expression... but would it work as a databinding expression, using <%# ... %> syntax? Are databinding expressions evaluated in data source controls?

Menu Control

bonokoot15-Jan-07 10:27

bonokoot

15-Jan-07 10:27

Hello All,
I'm trying to design a simple web site using a menu control that can
found at:

http://www.destinpipeline.com/default.htm

Is this an older way to do menu controls, and can this easily be done
in ASP.NET 2.0? Please provide any links to examples on how to do
this? If you also notice when you click on Capacity how the title
changes from Informational Postings to Capacity. I also need to figure
out how to do that as well.

Thanks

Re: Menu Control

achimera15-Jan-07 12:34

achimera

15-Jan-07 12:34

That site is implemented using frames, see:

http://www.destinpipeline.com/main_nav.htm[^]

It doesn't appear the navigation is anything more than plain HTML.

Truly Relative Pathz

Andrew S. Kloos15-Jan-07 8:49

Andrew S. Kloos

15-Jan-07 8:49

I would like to configure a web project with truly relative file and image pathz. regardless of server name or application name. I used to use"../dir_name/file_name" however an organizational shift forced me to move my entire directory structure down one level. instead of modifying "../dir_name/file_name" to "../../dir_name/file_name" i was attempting to use something like...

and

/Images/image_file.gif">

I again get nothing but if I set ImageUrl in the c# code behind using a variation of the line above it workz. Can anyone explain either which part of my syntax is wrong or why you can use this function sometimes but not other times.
Thanks,
D

Re: Truly Relative Pathz

Kschuler15-Jan-07 9:44

Kschuler

15-Jan-07 9:44

I don't have time to test out my theory, but I'm guessing that to do this in the html you would have to do it like this:

ImageURL=<%=Request.ApplicationPath & "/Images/image_file.gif"%>

Or some variation of this. Hope this helps.

File upload security

DanB198315-Jan-07 7:55

DanB1983

15-Jan-07 7:55

Hey.

I have a site that allows users to upload images to a web server. I realise this could be very dangerous and so i wish to limit users to uploading jpegs.

The way I have of dealing with this is to read the header of the file - if it is correct then allow the file to stay else delete it. However I am unsure of any more vulnerabilities that may be present.

If any one has any experience in this and would like to offer advise i would be most grateful.

Cheers

Dan

Re: File upload security

Jon Sagara15-Jan-07 9:13

Jon Sagara

15-Jan-07 9:13

Are you checking the MIME type? Are you limiting the file extensions to .jpg/.jpeg?

Jon Sagara
I controlled my laughter and simple said "No,I am very busy,so I can't write any code for you". The moment they heard this all the smiling face turned into a sad looking face and one of them farted. So i had to leave the place as soon as possible.
--Mr.Prakash
Blog | Site | Articles

Re: File upload security

Pete O'Hanlon15-Jan-07 9:13

Pete O'Hanlon

15-Jan-07 9:13

Oh man that is hard. The jpeg format is somewhat flexible - there are vendor specific implementations so it is hard telling whether or not it is valid. Normally, you read the first few bytes and then compare them to specific combinations. If memory serves, the standard is to store the first 4 bytes as ff d8 ff e0.

the last thing I want to see is some pasty-faced geek with skin so pale that it's almost translucent trying to bump parts with a partner - John Simmons / outlaw programmer

Deja View - the feeling that you've seen this post before.

Re: File upload security

DanB198315-Jan-07 9:55

DanB1983

15-Jan-07 9:55

Hey.

Yes i am going to limit the extension to jpg/jpeg. Need to look at the MIME type as I am uncertain to what it is but thanks for bringing that to light.

Regarding the second reply - I chose jpg without much research just because it is a common file type. Is this a bad choice? Should I use a different format?

Cheers

Dan

Re: File upload security

Vasudevan Deepak Kumar15-Jan-07 16:49

Vasudevan Deepak Kumar

15-Jan-07 16:49

Google Blogger prefers PNG. Even when we upload a GIF, it converts to PNG, if I am right. Is'nt it?

Vasudevan Deepak Kumar
Personal Homepage
Tech Gossips

MEDIUM & ADVANCE ASP.NET VISUAL TRAINER

Banjo Ayorinde15-Jan-07 7:12

Banjo Ayorinde

15-Jan-07 7:12

Am young user of asp.net.

I need medium and advance trainer, preferaly visual on ASP.NET

Thank you

Re: MEDIUM & ADVANCE ASP.NET VISUAL TRAINER

Not Active15-Jan-07 7:13

Not Active

15-Jan-07 7:13

Are you asking for someone to tutor you? Go to the job boards.

only two letters away from being an asset

using multi threading in web services

VishalSharmaDev15-Jan-07 6:15

VishalSharmaDev

15-Jan-07 6:15

hi dear

i am working on .net(1.1) web service and due to delay in response i made it multi threaded

but when i passed a object in function which is called on a new thread, it is throwing ObjectNullReference exception...

because it is unable to get value from the property of that object....

but by looking in quickwatch the state of object where it is throwing that exception

all the private member of object are having there values but in value column of quickwatch window

it is showing "error : cannot obtain value" against each and every public member.

i am giving you the source code how i am doing multi threading...

public class Threading
{
Testing testing = new Testing(PassedObject obj);
ThreadStart threadStart=new ThreadStart(testing.PerFormSomeAction);
Thread thread=new Thread(threadStart);
thread.Start();
}

public class Testing
{
private PassedObject _obj;
public void testing(PassedObject obj_)
{
this._obj=obj_;
}
public void PerformSomeAction()
{
// code here
// it is showing error here while accessing some of the property of _obj.
// but by using quickwatch it is showing value of private member's and displaying "error:cannot obtain value" for public members..
}
}

please help in the matter..

a kind reply is awaited

reply to : vishalsharma808@hotmail.com
vishalsharma556@yahoo.co.in
regards
vishal

Thanks & Regards

Vishal Sharma
vishalsharma556@yahoo.co.in

Re: using multi threading in web services

Guffa15-Jan-07 7:20

Guffa

15-Jan-07 7:20

You have to show some code that is actually possible to run, in order for someone to be able to say what's wrong with it.

The code that you have shown won't even compile, as the constructor you try to use to create an instance of the Testing class does not exist.

---
Year happy = new Year(2007);

Re: using multi threading in web services

VishalSharmaDev16-Jan-07 5:28

VishalSharmaDev

16-Jan-07 5:28

hi Guffa

thanks for your reply

actually it is not possible to post the whole code here because it contains so many references that you will again get more confused so i given a demo code to you...

please try to consider the posted code as it has the same flow which i have in real code..

thanks
vishal

Thanks & Regards

Vishal Sharma
vishalsharma556@yahoo.co.in

Re: using multi threading in web services

Guffa16-Jan-07 13:32

Guffa

16-Jan-07 13:32

Ok, if I only consider the code that you posted, it's not working because the Testing class doesn't have the constructor that you are trying to use.

If I assume that the class actually has that constructor eventhough you haven't shown it, I can't say what's wrong with the code because I don't know what the constructor does.

---
Year happy = new Year(2007);

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.