ASP.NET

Re: How to handle Invalid Session State on callback

1-Jul-14 19:14

The fact that your session is went done will not stop the web page to work perfectly correct! ViewState and all the related info was posted to the client (in hidden fields) and will be reused on the next post-back. The only problem with session down is authentication and data you stored on the session (ASP.NET engine do not store nothing on the session by default)...
More! You are using down-casting here which can be very dangerous...Who told you GetLastError will return an HttpException! Maybe it's a SystemException or a plain Exception?!
Also, if you read explanations of the error codes you use, you will see that none of them is connected to session end - http://msdn.microsoft.com/en-us/library/system.web.management.webeventcodes(v=vs.110).aspx[^]
If you want to catch session end - and maybe set a flag for later use - see for Globla.asax...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

David Mujica2-Jul-14 2:44

David Mujica

2-Jul-14 2:44

Hmmm. It seems thatI misunderstood the example code that I took off the web.

I will do some more research and re-attempt a solution.

Question: What is the best way to perform a session timeout situation? Is it possible in the VS2010 IDE ?

I've been publishing my App to a Sandbox IIS7 server and I've set the timeout to 1 minute, but this is cumbersome and difficult to debug.

Thanks for your help.

Re: How to handle Invalid Session State on callback

Kornfeld Eliyahu Peter2-Jul-14 2:51

Re: How to handle Invalid Session State on callback

2-Jul-14 2:51

You can add a button (in debug mode) that will call Session.Abandon[^] for you...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

David Mujica2-Jul-14 10:39

David Mujica

2-Jul-14 10:39

session.Abandon() is exactly what I needed. Test is perfect.

I will start a new thread for my next issue. "Response.Redirect" is not allowed in Callback.

Thanks for all your help.

Re: How to handle Invalid Session State on callback

Kornfeld Eliyahu Peter2-Jul-14 16:50

How to populate Model that has a property referring to detail\child table in MVC 4

2-Jul-14 16:50

Glad to help...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

jeAntoni1-Jul-14 6:56

jeAntoni

1-Jul-14 6:56

I have 2 Tables
1. TransTable
2. ErrorTable

TransTable has fields

TransID(PK),
TransDesc,
TransStatus

ErrorTable has fields

TransID(FK),
ErrorID(PK),
ErrorMessage

My Models are TransModel and ErrorModel.

TransModel
------------
int TransID
string TransDesc
string TransStatus
ErrorModel errorTable

ErrorModel
-----------
int TransID
int ErrorID
string ErrorMessage

My Problem
I need to query the DB and populate TransModel to display the table data.
So I want a method that returns

IEnumerable<TransModel>

How should I populate TransModel so that all the properties including the property errorTable gets populated
so that I can call in View as
model.errorTable.ErrorMessage.

Jeywin

modified 2-Jul-14 1:06am.

Re: How to populate Model that has a property referring to detail\child table in MVC 4

Gourab Bose8-Jul-14 21:28

Gourab Bose

8-Jul-14 21:28

http://stackoverflow.com/questions/13047845/how-to-include-a-child-objects-child-object-in-entity-framework-5[^]

Resize image without change in master image

mor kan1-Jul-14 4:26

mor kan

1-Jul-14 4:26

i have a image in database.
i want change size my image in html website without change to master image.
i used this code for resize me image:

string newPathToSave = @"\Images\Thumbnail\sample.jpg";
MemoryStream memory = new MemoryStream(File.ReadAllBytes("./Images/run.png"));
Image img = Image.FromStream(memory);

System.Drawing.Bitmap bmpResized = new System.Drawing.Bitmap(img, 248, 80);
bmpResized.Save(memory, img.RawFormat);
 bmpResized.Save(newPathToSave);
img.Dispose();
bmpResized.Dispose();

i use this namespace:

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Drawing;
using System.Drawing.Bitmap;
using System.IO;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;

but,i get error :

Error  10  A using namespace directive can only be applied to namespaces; 'System.Drawing.Bitmap' is a type not a namespace    F:\Education\Education\sendNewsPage.aspx.cs 15  7   Education

Richard Deeming1-Jul-14 5:49

Richard Deeming

1-Jul-14 5:49

mor kan wrote:
using System.Drawing.Bitmap;

mor kan wrote:
A using namespace directive can only be applied to namespaces

mor kan wrote:
'System.Drawing.Bitmap' is a type not a namespace

Did you actually read the error message?

A using namespace directive can only be applied to a namespace, not a type;
System.Drawing.Bitmap is a type, not a namespace;
You have using System.Drawing.Bitmap; in your file on line 15;

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

mor kan1-Jul-14 7:58

mor kan

1-Jul-14 7:58

i changed my code :

string newPathToSave = @"F:\Education\Education\Images\Thumbnail\sample.jpg";
            MemoryStream memory = new MemoryStream(File.ReadAllBytes(@"F:\Education\Education\Images\run.png"));
            //imgNameSpace  img = imgNameSpace.FromStream(memory);
            System.Drawing.Image img = System.Drawing.Image.FromStream(memory, true);
            System.Drawing.Bitmap bmpResized = new System.Drawing.Bitmap(img, 248, 80);
            bmpResized.Save(memory, img.RawFormat);
            bmpResized.Save(newPathToSave);
            img.Dispose();
            bmpResized.Dispose();
            myuser.SrcNews = newPathToSave;

but:

System.Runtime.InteropServices.ExternalException was unhandled by user code
  Message="A generic error occurred in GDI+."
  Source="System.Drawing"
  ErrorCode=-2147467259
  StackTrace:
       at System.Drawing.Image.Save(String filename, ImageCodecInfo encoder, EncoderParameters encoderParams)
       at System.Drawing.Image.Save(String filename, ImageFormat format)
       at System.Drawing.Image.Save(String filename)
       at Education.WebForm5.sendNewsBtn_Click(Object sender, EventArgs e) in F:\Education\Education\sendNewsPage.aspx.cs:line 56
       at System.Web.UI.WebControls.Button.OnClick(EventArgs e)
       at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
       at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
       at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException:

mor kan1-Jul-14 8:03

mor kan

1-Jul-14 8:03

my problem solved by code & create Thumbnail\sample.png in f: drive :

string newPathToSave = @"F:\Education\Education\Images\Thumbnail\sample.png";
          MemoryStream memory = new MemoryStream(File.ReadAllBytes(@"F:\Education\Education\Images\run.png"));
          //imgNameSpace  img = imgNameSpace.FromStream(memory);
          System.Drawing.Image img = System.Drawing.Image.FromStream(memory, true);
          System.Drawing.Bitmap bmpResized = new System.Drawing.Bitmap(img, 248, 80);
          bmpResized.Save(memory, img.RawFormat);
          bmpResized.Save(newPathToSave);
          img.Dispose();
          bmpResized.Dispose();
          myuser.SrcNews = newPathToSave;

but :
do not show any image , why?

Ali Al Omairi(Abu AlHassan)

Richard Deeming1-Jul-14 8:31

Richard Deeming

1-Jul-14 8:31

You're setting the URL of the image to a local path on your server. That won't work; you need to set it to the relative path of the image on your site.

For example, if your images are stored in a folder called "thumbnail" within a folder called "images" which is in the root of your site, then you should set the URL to "~/images/thumbnail/sample.png"

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

ctl Prefix in ClientID

Ali Al Omairi(Abu AlHassan)30-Jun-14 2:22

30-Jun-14 2:22

guys;
I have a drop down in an aspx page, its rendered with an uniqueid (name) that begins with 'ctl' but with a ClientID(id) that doesn't begin with that prefix.

any body knows why.

Help people,so poeple can help you.

Kornfeld Eliyahu Peter30-Jun-14 3:29

30-Jun-14 3:29

ASP.NET rendering engine creates all id attributes to ensure that your page comforts with HTML standard (unique id).
Read here some explanations about it: http://msdn.microsoft.com/en-us/library/vstudio/1d04y8ss(v=vs.100).aspx[^]
Also notice, that you can control (to a certain level) how those ids are generated...

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

Ali Al Omairi(Abu AlHassan)

Ali Al Omairi(Abu AlHassan)1-Jul-14 0:41

1-Jul-14 0:41

Sir;
Thank you for your reply,But it was simpler than that.
I just associated the deployed version with an application pool that uses 4.0 framework.
And when I changed it to 2.0, every thing worked normally.

Help people,so poeple can help you.

Kornfeld Eliyahu Peter1-Jul-14 0:43

1-Jul-14 0:43

I'm glad you found a solution!
Now I suggest you go and learn the differences between ASP.NET 2.0 and 4.x regarding id generation in web pages - it is important!

I'm not questioning your powers of observation; I'm merely remarking upon the paradox of asking a masked man who he is. (V)

Ali Al Omairi(Abu AlHassan)

Ali Al Omairi(Abu AlHassan)1-Jul-14 21:51

1-Jul-14 21:51

Yes, because if you left the ClientID Mode not set it would take the default value from the application bool which is predicable by default which can make some confusion

Help people,so poeple can help you.

Kornfeld Eliyahu Peter1-Jul-14 21:54