ASP.NET

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

10-Jul-07 3:36

I am really confused with this issue. I have a datagrid where I am creating columns dynamically. Everything gone fine till page posts back. It failed to maintain the state of the grid. I tried with enabling view state for the grid, but no use! Confused | :confused:

What is happening ? Is ASP.NET having any problem on keeping the data for dynamically created columns ?

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Michael Sync10-Jul-07 5:45

Michael Sync

10-Jul-07 5:45

Yeah. That's why we used to do like that

Page_load(){<br />
  if(!IsPostBack){<br />
     DataSet ds = Database.GetDataMethod();<br />
     datagrid.DataSource = ds.Table[0];<br />
     datagrid.DataBind();<br />
     Cache["mydata"] = ds.Table[0];<br />
  }<br />
  else{<br />
     datagrid.DataSource = Cache["mydata"];<br />
     datagrid.DataBind();    <br />
  }<br />
}

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

N a v a n e e t h10-Jul-07 18:12

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

10-Jul-07 18:12

Thanks for your suggestion Michael, But assume that I have some textboxes in these dynamically created columns. I won't be able to access the textbox value because of this problem. Your code caches the datatable and binds it again, but what about the values changed in text boxes ? I think I won't be able to get it

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Michael Sync10-Jul-07 19:21

Michael Sync

10-Jul-07 19:21

Yeah. I think so.. One way I can think of is that you hav to save those values in somewhere (eg: cache) before postback and set it back accordingly onload. it's not flexible solution....

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

N a v a n e e t h10-Jul-07 22:22

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

10-Jul-07 22:22

Michael Sync wrote:
I can think of is that you hav to save those values in somewhere (eg: cache) before postback and set it back accordingly

That is fine. But what will happen if I change the control value before posting back ? This method will assign previous value to the controls.. I think this is a bug in ASP.NET. What do you think ?

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Rhys Gravell10-Jul-07 20:55

Rhys Gravell

10-Jul-07 20:55

Why create dynamic columns?

You can use template columns and create a template containing multiple web server controls to manage the the dynamic presentation of content which will have their state maintained, and can also utilise the RowDataBound event to manipulate row level content if you have a need to go that far.

Rhys

"The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it"

They say a little knowledge is a dangerous thing, but it's not one half so bad as a lot of ignorance."
Terry Pratchett

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

N a v a n e e t h10-Jul-07 22:25

Re: ASP.NET failed to maintain state when dynamically binding columns datagrid

10-Jul-07 22:25

Rhys666 wrote:
You can use template columns and create a template containing multiple web server controls to manage the the dynamic presentation of content which will have their state maintained,

Thanks, But I won't be able to do this, because I can't predefine the number of columns that I have on the grid. So how do I implement this method. One question, If I place a contentplaceholder inside template columns or added controls dynamically to the template columns, will it maintain the state ?

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Rhys Gravell10-Jul-07 22:56

Rhys Gravell

10-Jul-07 22:56

Navaneeth. wrote:
Thanks, But I won't be able to do this, because I can't predefine the number of columns that I have on the grid

Why? I've got to be honest and say I can't really see where you're trying to go with this, as a developer surely you know have some awareness of the base objects you're dealing with. It just appears you're trying to be too generic in your approach and it'll probably mean more work and far less re-usability in the long run. Can you explain why you need an almost entirely dynamic DataGrid/GridView?

I'd assume that as per dynamic controls on a page what you need to do is recreate your dynamic columns and their controls on every postback and if that doesn't work, what you're attempting probably isn't supported.

how to find no of days in a month

Vipin.d10-Jul-07 2:39

Vipin.d

10-Jul-07 2:39

Hi,

i know the month .
From this how i find the number of days in that month

All I ever wanted is what others have....
CrazySanker

Re: how to find no of days in a month

Christian Graus10-Jul-07 2:39

Re: how to find no of days in a month

10-Jul-07 2:39

DateTime.DaysInMonth ?

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 )

Vipin.d10-Jul-07 3:30

Vipin.d

10-Jul-07 3:30

i got it..
int iNoDay=System.DateTime.DaysInMonth(EntTransactionDate.Year, EntTransactionDate.Month);

thank u

All I ever wanted is what others have....
CrazySanker

Clearing Text in a Label Control Before Redericting The Page

Mahesh.J10-Jul-07 2:35

Mahesh.J

10-Jul-07 2:35

Hi..
I want to clear the Text of a label Control Before Redericting the page to another page.How should i do it in .Net 2003

I am clearing the Text of the Label in a Button Click event and then I am Redericting the Page
But it is not working. I am Expecting a reply

Thanks
Mahesh.J

Re: Clearing Text in a Label Control Before Redericting The Page

Christian Graus10-Jul-07 2:38

10-Jul-07 2:38

Mahesh.J wrote:
I am Expecting a reply

I bet you are...

What do you want to do ? Your button click event will fire on the server side, and the page with the label cleared will not be rendered, because you will redirect before that can happen. Why do you need to clear it first ? It's lost anyhow.... To do this so the user sees it clear, you'd need to use javascript.

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 )

Web services

Imthu10-Jul-07 2:26

Imthu

10-Jul-07 2:26

hai all,

i would like to know how to use web services..can any one help with
good example or goos link... thanks in advance

with Regards,
Imthiyas Ahamed.A

Christian Graus10-Jul-07 2:35

10-Jul-07 2:35

www.google.com ?

Seriously, there's a lot of reading on offer, and your question is far too vague for a decent response. Do you know what a web service is, or did you just hear the terminology somewhere ?

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 )

Imthu10-Jul-07 2:47

Imthu

10-Jul-07 2:47

hai,

i know the concept of webservice.. but still i have not applied in projects..

with Regards,
Imthiyas Ahamed.A

Sathesh Sakthivel10-Jul-07 2:55

Sathesh Sakthivel

10-Jul-07 2:55

Get it[^]

Regards,

Satips. Rose | [Rose]

Don't walk in front of me, I may not follow;
Don't walk behind me, I may not lead;
Walk beside me, and just be my friend. - Albert Camus

Christian Graus10-Jul-07 5:14

Re: Routing using web page

10-Jul-07 5:14

Well, if you know how it works, then there's no need for you to use it, until it meets the needs of a project.

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 )

Routing using web page

moon_stick10-Jul-07 1:35

moon_stick

10-Jul-07 1:35

I've had a random request from one of our techs - basically he wants a web page that will check to see if a webpage on a particular server is available; if it is then redirect the user to that server, otherwise redirect to a different server.

Does anyone have any suggestions about where I might start on this - how can I check for a server timeout?

Cheers

Dave

Christian Graus10-Jul-07 2:39

How can i get Transaction Key on Authorize.net

10-Jul-07 2:39

the problem is, to wait for a timeout on the server, means your own page will time out. I don't think it can be done, if you redirect to a page, your page has lost control, so it can't then redirect if the first page fails, unless it uses frames or something.

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 )

mangrovecm10-Jul-07 0:53

mangrovecm

10-Jul-07 0:53

Dear Experts,
I am integrate Payment of Authorize.net into my shopping cart.

I have a code lines:

string url = "https://certification.authorize.net/gateway/transact.dll";
StringBuilder strBuilder = new StringBuilder();
strBuilder.Append("x_login=" + login_ID + "&");//I have already login_ID
strBuilder.Append("x_tran_key=Tran_Key&"); //I don't know
strBuilder.Append("x_method=CC&");
strBuilder.Append("x_type=AUTH_CAPTURE&");
strBuilder.Append("x_amount=1.00&");
strBuilder.Append("x_delim_data=true&");
strBuilder.Append("x_delim_char=|&");
strBuilder.Append("x_relay_response=false&");
strBuilder.Append("x_card_num=" + card_num +"&");
strBuilder.Append("x_exp_date=092008&");
strBuilder.Append("x_test_request=true&");
strBuilder.Append("x_version=3.1");

string strPost = strBuilder.ToString();
StreamWriter myWriter = null;

HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);
objRequest.Method = "POST";
objRequest.ContentLength = strPost.Length;
objRequest.ContentType = "application/x-www-form-urlencoded";

try
{
myWriter = new StreamWriter(objRequest.GetRequestStream());
myWriter.Write(strPost);
}
catch (Exception e)
{
return e.Message;
}
finally
{
myWriter.Close();
}

HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
{
result = sr.ReadToEnd();
// Close and clean up the StreamReader
sr.Close();
}
return result;

All requests are failed because i have not know x_tran_key (Transaction Key).
How can i get the Transaction Key?

Thank in advance,

Kiet

vtkiet05

Re: How can i get Transaction Key on Authorize.net

N a v a n e e t h10-Jul-07 1:03