ASP.NET

How to block a malicous user?

21-Jul-06 5:19

it could be path which when you deploy not recognised by app... or your DLL call another DLL method which is not there on deployment server.

sorry if its not the case.

Nav.

Barry Etter21-Jul-06 4:19

Barry Etter

21-Jul-06 4:19

I have a free website that allows alumni of my high school to sign up and share information. It's like classmates.com, except it's free to alumni of my school (http://www.daviehighalumni.com[^] if you're interested).

There is one user who likes to cause problems by posting offensive messages on my message board, annoy other users, etc. I can easily block this user from signing in, but have no restrictions on creating new accounts, so they can easily create a new account and continue their behaviour.

I could try requiring e-mail authentication before a new account can be used, but this person could impersonate another alumni who doesn't yet have an account. I can't base it on IP address because they change often. I can't base it on name or e-mail address because a person can easily use a different name or create a new e-mail address.

Here's my last attempt to block this person: I put a tag on their profile so that when they logged in, I set a cookie on their computer. From then on, if I see this cookie, I don't let them log on or create new accounts. I thought this would keep them out for sure, but it hasn't worked as they apparently know how to delete cookies or are going to different computers.

So, does anyone have any ideas on blocking a user from accessing a web site when the web site is free and allows users to create accounts?

Barry Etter

mnaveed21-Jul-06 5:06

21-Jul-06 5:06

you can set a message/post approve system which control by one or more site admins

Nav.

Grapes-R-Fun21-Jul-06 16:03

Grapes-R-Fun

21-Jul-06 16:03

Yeah, I was gonna say the same thing too. He can also create a dictionary of offensive words/phrases, and create a utility of some kind that checks user inputs against that list as a pre-approval process. Just a suggestion!

Nila Fridley

minhpc_bk21-Jul-06 18:12

21-Jul-06 18:12

IMHO, one of the ways is to provide a link, say Report Abuse, so that other members of the site can use to report it to the admin board. Also, to gain more attention from the gurus here, you might consider posting this question in the lounge (as I don't think it's a programming question Big Grin | :-D

) where you can get a couple of golden tips from someone like the Lord Chris, code-frog, Andy Brummer ....

Retrieving the Cell value

Jeremy Falcon26-Jul-06 15:53

Jeremy Falcon

26-Jul-06 15:53

If your site is running on a Windows server, you could try parsing the output of...

nbtstat -A ipaddress

Jeremy Falcon

VenkataRamana.Gali21-Jul-06 3:45

21-Jul-06 3:45

Hello all,

in asp.net 1.1 webform, in this form one gird, having 4 columns, one column is checkbox, rest of the 3 columns are having some data.

There is a button below the grid. when selecting a checkbox from grid & clicking on the button. my code is

foreach(DataGridItem dgi in datagrid1.Items) <br />
{<br />
   string temp = dgi.Cells[2].Text <br />
}

my problem is temp string is displaying blank.

how to get the 2nd cell value?

regards
GV Ramana

mnaveed21-Jul-06 3:50

21-Jul-06 3:50

use the DataBound event for getting the selected row and its values

Nav.

VenkataRamana.Gali21-Jul-06 3:54

21-Jul-06 3:54

thx for reply

I have one button below the grid.

when clicking on that button i am getting the text of 2nd cell and doing some operation. for that i need.

How i will get?

plz tell me

regards
GV Ramana

mnaveed21-Jul-06 4:08

21-Jul-06 4:08

you can get value in ItemDataBound event and save it to string and use it in any function you want to use you can get value in ItemDataBound like this.

CheckBox  cb = CType(e.Item.Cells(0).Controls(0), CheckBox); <br />
           if(cb.Checked == true) <br />
               string temp = e.Item.Cells(2).Text.ToString();

Nav.

Re: Retrieving the Cell value ***********

Frank Kerrigan21-Jul-06 3:51

Frank Kerrigan

21-Jul-06 3:51

It looks like you are getting ALL the info for each row in the datagrid. This will overwrite string temp with the last row, which is the footer of the datagrid and therefore it will be blank.

You could test the checkbox in the forloop looking for the checkbox enabled

or / and

Have a string array and copy the cell information into the array

or

Use ItemDataBound on the row you wish to select to store the data.

Look where you want to go not where you don't want to crash.

Bikers Bible

VenkataRamana.Gali21-Jul-06 4:04

21-Jul-06 4:04

Hi
plz understand my qtn. in my grid 2nd value field is name. with that name i am doing some operation

foreach(DataGridItem dgi in datagrid1.Items) <br />
{<br />
 CheckBox chk = (CheckBox)dgi.Cells[0].FindControl("chkSelect");<br />
 if(chk.Checked)<br />
  {<br />
      string sName = dgi.Cells[2].Text <br />
      CallingAnotherFunction(sName);<br />
      OneMoreOperation(sName);<br />
   }<br />
}

this entire thing will happen when clicking on button.
my problem is i am getting everytime sName is blank.

regards
GV Ramana

minhpc_bk21-Jul-06 18:04

Re: Retrieving the Cell value ********

21-Jul-06 18:04

How do you define the second column? Is it a bound column or a template column? Basically, you can use the Text property at a specific cell when the column is a bound column. If it is displayed via a control, you need to get reference to the control first, then get the value.

VenkataRamana.Gali21-Jul-06 21:56

Re: Retrieving the Cell value ********

21-Jul-06 21:56

second column is template colummn in this i am binding like this

<ItemTemplate><br />
<%# DataBinder.Eval(Container.DataItem, "EMAIL")%><br />
</ItemTemplate>

plz tell e

regards
GV Ramana

minhpc_bk22-Jul-06 3:45

problem in Export to Excel

22-Jul-06 3:45

Because you are using the data binding expression with the Template column, so the DataBoundLiteralControl is generated in each cell, and you need to cast the control in the Controls collection to this type before you access the Text property:

DataBoundLiteralControl lit = item.Cells[2].Controls[0] as DataBoundLiteralControl;
string value = lit.Text;

Jeeva Mary Varghese21-Jul-06 2:58

Jeeva Mary Varghese

21-Jul-06 2:58

Hello All,
I'm trying to do a page which exports a table to Excel. But a set of statements gets printed on my page, when i try to export it again. The statements are:-

"Server: Microsoft-IIS/5.1 Date: Fri, 21 Jul 2006 11:32:11 GMT X-Powered-By: ASP.NET X-AspNet-Version: 1.1.4322 Content-Disposition: attachment; filename=FileName.xls Cache-Control: private Content-Type: application/octet-stream; charset=utf-8 Content-Length: 3908 "

At first i used "cache" instead of "viewstate".I thought cachewas making problems but all in vain.
Can anyone tell me what the problem is due to?

Thank you.

Regards,
Jeeva

My Code is:-

ViewState["DataTableExportToExcel"] = (DataTable)grdReportResult.DataSource;

private void ExportToExcel()
{
DataSet ds = new DataSet();
DataTable dt = new DataTable();
dt = (DataTable)ViewState["DataTableExportToExcel"];
ds.Tables.Add(dt.Copy());
clsGeneral objclsGeneral = new clsGeneral(); SaveExcel(objclsGeneral.SaveExcelToServer(ds,MapPath("Excell\\FileName.xls")));
//Procedure for exporting data to excel and save it into the server
//Cache.Remove("DataTableExportToExcel");

}

private void SaveExcelToClientMechine(string fileName)
{
System.IO.FileInfo targetFile = new System.IO.FileInfo(fileName);
Response.Clear();
Response.AddHeader("Content-Disposition", "attachment; filename=" + targetFile.Name);
Response.AddHeader("Content-Length", targetFile.Length.ToString()) ;
Response.ContentType = "application/octet-stream" ; Response.WriteFile(targetFile.FullName);
}

Re: problem in Export to Excel

minhpc_bk21-Jul-06 18:01