ASP.NET

Re: need a help regarding chat program in asp.net(c#)

7-Dec-09 4:03

I think this has been asked here for at least 10 times... Did you search before asking ? Frown | :(

Abhishek Sur
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dan!sh 7-Dec-09 6:26

dan!sh

7-Dec-09 6:26

Abhishek Sur wrote:
I think this has been asked here for at least 10K times... Did you search before asking ?

FTFY

50-50-90 rule: Anytime I have a 50-50 chance of getting something right, there's a 90% probability I'll get it wrong...!!

Re: need a help regarding chat program in asp.net(c#)

Abhishek Sur7-Dec-09 6:39

7-Dec-09 6:39

Abhishek Sur
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PDF Download Error.

nccs12346-Dec-09 21:51

nccs1234

6-Dec-09 21:51

I have Created a pdf file by using pdfSharp and save in a location.but when i want to open that pdf file on the link button click event down load dialogue box is appear and when i clicked the open button.Adobe Reader throws the Strange Error message.the Error Message is

Adobe Reader couldn't open "invoice__2009[1].pdf because it is either not supported file type or because the file has been damaged(for example it was sent as an email attachment and wasn't correctly decoded)

(my filename is only invoice__2009 but [1] is extra comming in the message)
can you help me for this matter?

My code sample is

string inv = Session["invN0"].ToString();
Response.Clear();
Response.ClearHeaders();
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + inv);
Response.TransmitFile(Server.MapPath(("~/") + "Shopping/pdfInvoice/" + inv));

Response.End();

Thank You
Pawan

Re: PDF Download Error.

Abhishek Sur7-Dec-09 0:48

7-Dec-09 0:48

Check the response. I think you are ending the response before writing the output.

Also use Response.BinaryWrite to write binary data in response.

Cool | :cool:

Abhishek Sur
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Re: PDF Download Error.

nccs12347-Dec-09 18:10

nccs1234

7-Dec-09 18:10

I also tried that but the result is same.
This code works when I used it on same Block where i generate the pdf.But when i pass the Pdf file name in session and used it in the Button click event this error throws.

checkbox list control

mylogics6-Dec-09 20:49

mylogics

6-Dec-09 20:49

hii
i want that at a time only one item can be selected in a text box.for this i have written following code at selected index changed event but its not working f9.plz tell me where m i wrong...

protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        
        for (int i=0; i < CheckBoxList1.Items.Count-1; i++)
        {
            if (CheckBoxList1.Items[i].Selected == true)
            {
                for (int j = i + 1; j <= CheckBoxList1.Items.Count - 1; j++)
                {
                    
                       // CheckBoxList1.Items[k].Selected = false;
                        CheckBoxList1.Items[j].Selected = false;
                   

                }
            }
            else
            {
                CheckBoxList1.Items[i].Selected = false;
            }
            
            
        }
    }

N a v a n e e t h6-Dec-09 20:56

N a v a n e e t h

6-Dec-09 20:56

If you want only one item to be selected, use radio buttons. Not check box.

Best wishes,
Navaneeth

mylogics6-Dec-09 20:59

mylogics

6-Dec-09 20:59

if i want to do it using checkbox what shud i do.can i do this without using script.

Abhishek Sur6-Dec-09 21:14

6-Dec-09 21:14

Just put one Javascript which might uncheck all other checkboxes whenever one checkbox is checked.

var thiselement = null;
var elem = document.getElementsByName('groupname');
for(var i=0; i<=elem.length; i++){
    if(!elem[i].id.equals('checkboxclientid')
      elem[i].checked = false;
    else
       thiselement = elem[i];
}

thiselement.checked = true;

Just pass appropriate groupname and checkboxclientid and you are done.

Cheers. Rose | [Rose]

Abhishek Sur
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Abhijit Jana6-Dec-09 21:19

6-Dec-09 21:19

mylogics wrote:
.can i do this without using script.

FYI : Abhishek, I guess he is not looking for Script. Smile | :)

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Abhishek Sur6-Dec-09 21:34

6-Dec-09 21:34

Yes.... But How can he do this without script.. .There is no way.. If he dont want to use script.. only way out is to move to Radiobutton...

Wink | ;)

Abhishek Sur
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Re: Making Forum in asp.net

ketand17-Dec-09 0:13

ketand1

7-Dec-09 0:13

If you want to select only one item at a time then please use radio button

Thanks

Making Forum in asp.net

Any_India6-Dec-09 20:09

Any_India

6-Dec-09 20:09

hi,
Is there any artical or any code is there to make good forum for post and reply

thanks.

Abhijit Jana6-Dec-09 20:24

Re: Making Forum in asp.net

6-Dec-09 20:24

What kind of Forum you want to developed ? If you are looking for a forum like CodeProject.com you can have a look into this
JumpyForum: Inspired by Code Project Forum / Discussion / Message board[^]

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

manikebs7-Dec-09 0:29

manikebs

7-Dec-09 0:29

hello,

Am trying to write a project. it is an online bookstore. wat can u do?

Re: Making Forum in asp.net

Ashfield7-Dec-09 1:23

Ashfield

7-Dec-09 1:23

Whats that got to do with the original question?

manikebs wrote:
wat can u do?

Lots. What can you do?

Bob
Ashfield Consultants Ltd
Proud to be a 2009 Code Project MVP

Getting cell values for selected rows in server side

NK76-Dec-09 18:19

NK7

6-Dec-09 18:19

Hi
I have one datagrid i am binding the grid from backend. Data grid has 5 column col1, col2, col3, col4 and col5. I need to select any cell run time and drag only the selected cell into another grid. If I click row[1][3] i have to drag only the cell. Next time i will select row[3][5] in run time.

My question is how to find the selected cell value in server side.

I tried with selected index. But it will work only if we know the column name for ex row[0][4], but the column selection will change next time.

Can any one help me please?

regards

kesavan

Re: Getting cell values for selected rows in server side

Nishant Singh6-Dec-09 19:35

Nishant Singh

6-Dec-09 19:35

Selected Index will give you the selected row, and for each cell in RowDataBound attach a javascript function which updates a hdnValue on click ,
Access that hidden value to find row and column combination

Re: Getting cell values for selected rows in server side

NK77-Dec-09 23:34

NK7

7-Dec-09 23:34

hi can you explain with example please

regards

kesavan

What exactly Difference between Application and Session ?

satyamzen6-Dec-09 14:47

satyamzen

6-Dec-09 14:47

Hi all,
While i went to an interview interviewer asked me Difference between Application and Session ? Application common for all users but session is user level, but he didn't convinced with my answer. Please explore on my question.

Thanks..

Re: What exactly Difference between Application and Session ?

Dennis Dykstra6-Dec-09 16:23

Dennis Dykstra

6-Dec-09 16:23

According to Wikipedia[^],

"a web application is an application that is accessed via a web browser over a network such as the Internet or an intranet. The term may also mean a computer software application that is hosted in a browser-controlled environment (e.g. a Java applet) or coded in a browser-supported language (such as JavaScript, possibly combined with a browser-rendered markup language like HTML) and reliant on a common web browser to render the application executable."

By comparison, a browser session starts when an individual user accesses or logs onto a particular website and concludes when the user logs off, closes the browser, or clicks away from that website. The session may or may not involve authentication.

Re: What exactly Difference between Application and Session ?

Abhijit Jana6-Dec-09 16:48

Re: What exactly Difference between Application and Session ?

6-Dec-09 16:48

satyamzen wrote:
While i went to an interview interviewer asked me Difference between Application and Session ?

I guess he has asked about "Application State" Not "Application" . You can explain them in following way.

System.Web.HttpApplicationState class is used to maintain the Application State For ASP.NET Application.It provides methods for storing information which can be accessed globally means it common for the all used.

As For Example :

Storing Info At Application Variable :

Application["Title"] = "Welcome";

// Reading the Information from application variable

string Title;
if (Application["Title"] != null)
     Title = Application["Title"].ToString();

On the other hand Session stored on server side and its unique for each and every user. We can interact with Session State with System.Web.SessionState.HttpSessionState class, because this provides built in Session Object with Asp.Net Pages.

As For Example :
Following code is used for storing a value to session

//Storing UserName in Session
 Session["UserName"] = txtUser.Text;

Now, let see how we can retrieve values from Session

//Check weather session variable null or not
        if (Session["UserName"] != null)
        {
            //Retrieving UserName from Session
            lblWelcome.Text = "Welcome : " + Session["UserName"].ToString();
        }
        else
        {
         //Do Something else
        }

Below are the associated events that are used for Session and Application State. This are events for Global.asax file.
For Application : Application_Start, Application_End
For Session : Session_Start and Session_End

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
Don't forget to click "Good Answer" on the post(s) that helped you.

Dinesh Mani6-Dec-09 20:30

Dinesh Mani

6-Dec-09 20:30

The simplest answer to that question would be that an Application or variables in Application state are initialized when the application receives the first user request. Data in the application state is common to all users. Application variables generally get recycled during Application Pool recycling [This is my understanding, somebody please confirm!!].

Session on the other hand is user specific and starts when the server receives the first request from a user browser and ends after the user closes the browser. Each user gets a separate share of memory for his session data and hence Session variables have to be used cautiously. Also, one user can open more than one session from the same computer using different browsers, i.e. I can get two session to CP and login using 2 different logins, from IE and Firefox, simultaneously.

HTH!!

Re: What exactly Difference between Application and Session ?

Abhijit Jana6-Dec-09 20:42