Re: Generics & ViewState - ASP.NET Discussion Boards

Re: Event problem

CWIZO12-Nov-06 11:17

CWIZO

12-Nov-06 11:17

Define "nothing happens"

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Re: Event problem

shapper12-Nov-06 12:17

shapper

12-Nov-06 12:17

Hi,

I added the control to a page and the following code:

Private Sub by27fContactForm_FormSubmited(ByVal sender As Object, ByVal e As EventArgs)
Response.Redirect("http://www.google.com")
End Sub

When I click the button the browser should load the page www.google.com.
Nothing happens. I also tried other things to test the event handler but nothing happens.

What should I do?

Thanks,
Miguel

<form> on masterpage and user controls

moazzamahmed11-Nov-06 20:35

moazzamahmed

11-Nov-06 20:35

ok so I didnt think this would be such a big deal, but Im having trouble (errors etc.)
accessing a on a masterpage, within a user control:

1. masterpage has

<asp:contentplaceholder id="ContentPlaceHolder1" runat="server">

2. then I have a aspx page that inherits from this master page, I have
<asp:content id="Content1" contentplaceholderid="ContentPlaceHolder1" runat="Server">

<uc1:ucsaddlocation id="UcsAddLocation1" runat="server">

3. the user control's code-behind has
if (!Page.IsPostBack)
{
RadioButtonList rblLocationHandle = (RadioButtonList) frmAddLocation.FindControl("rblAddLocation");

if (Request.Form["rblAddLocation"] == null)
... etc.

but when I run the page, it says "frmAddLocation" is not valid in this context.

So how do you access a form thats on the masterpage, in the user control?

also, when my default.aspx page, which is part of ANOTHER masterpage, posts to the AddLocation.aspx page, Request.Form["rblAddLocation"] is always null! but Request.Form[4] isnt! how come? thing is, when I use [4], and I go to AddLocation page directly, meaning without a post, it bombs on [4].

now, I can catch it, and move on, but what the heck is going on? how do you use <forms> on master pages and user controls?

thanks in advance!

Moazzam

Re: <form> on masterpage and user controls

Guffa12-Nov-06 0:33

Guffa

12-Nov-06 0:33

Use the "Ignore HTML" option when posting html, or it won't be readable. I have no idea why they chose to not encode the html code in the forum, it's a constant source of problems, but that's the way it works here.

You can't access the control directly from within the user control, as the control is not part of the user control. If you want to access it, you need to do it through the reference to the page object, and cast it to the exact class of the page. This is the opposite of how a user control is supposed to work, though. It's purpose is that you should be able to reuse the control on more than one page, but that's not possible if the user control relies on being used on a specific page.

When you use controls in a container, their client id changes, so you can't use Request.Form with the server id of the control. Look in the generated source code of the page to see what the client name of the control is.

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Re: <form> on masterpage and user controls

moazzamahmed13-Nov-06 11:52

moazzamahmed

13-Nov-06 11:52

thanks for the response.

I tried to read the fields from the control but it wouldnt work, then all of a sudden it started to work. cause yeah I understand the user control shouldnt be dependent on anything else, or it breaks.

I also found out, you dont use POST to transfer stuff anymore, just do postbacks, then transfer via response.redirect using querystring.

did I get that right?

thanks!

Inserting line numbers

sudidela11-Nov-06 19:02

sudidela

11-Nov-06 19:02

how to insert line numbers to a document that is displayed when the page is loaded.

Generics & ViewState

eggie511-Nov-06 17:41

eggie5

11-Nov-06 17:41

Why don't they update ViewState to use generics?!?

/\ |_ E X E GG

Re: Generics & ViewState

aamironline12-Nov-06 1:58

aamironline

12-Nov-06 1:58

What does this mean?

M Aamir Maniar
aamirOnline.com

what is the opposite action for Fill(dataset)

karanba11-Nov-06 14:48

karanba

11-Nov-06 14:48

I want to get

1. get some data using a SqlDataAdapter from a query on db
2. close connection from db
3. fill a dataset and bind it to a control.
4. making updates on data and post it back to db update all rows back.

but it must like saving an excel page. So what can be the best method. Is there anything like opposite action of a dataAdapter fill method.

	<br />
     // ACTION 1,2,3 <br />
     SqlDataAdapter da;	<br />
      <br />
      using (SqlConnection con = new SqlConnection(connectionString)) {<br />
             cmd.Connection = con;		<br />
             con.Open();<br />
             da = new SqlDataAdapter(cmd)	<br />
      }<br />
<br />
      ds = new Dataset();<br />
      da.Fill(ds)<br />
      ...<br />
      // bind the data to a control, may be a repeater <br />
      // which has form inputs field for each row and  field of data       <br />
      // user makes changes on data.<br />
<br />
      // ACTION 4 ? update it back to db.<br />
<br />

karanba

Re: what is the opposite action for Fill(dataset)

Guy Harwood12-Nov-06 11:18

Guy Harwood

12-Nov-06 11:18

well yes, da.Update(ds)

providing you specify an update command (i see you have specified a select command when initializing your data adapter)

---Guy H ( Wink | ;-)

---

closing a connection

karanba11-Nov-06 14:01

karanba

11-Nov-06 14:01

Hi, I want to learn, which will be is true for best performance. Are those the same thing that not to close a connection and leave it to dispose when the scope finishes.

<br />
    // do not close connection<br />
    public static SqlDataAdapter getDataAdapter(SqlCommand cmd, string connectionString)<br />
    {<br />
        SqlConnection con = new SqlConnection(connectionString);<br />
        cmd.Connection = con;<br />
        con.Open();<br />
        return new SqlDataAdapter(cmd);<br />
    }

<br />
// close connection <br />
public static SqlDataAdapter dataAdapter(SqlCommand cmd, string connectionString)<br />
{<br />
    SqlConnection con = new SqlConnection(connectionString);<br />
    cmd.Connection = con;<br />
    con.Open();<br />
    SqlDataAdapter da = new SqlDataAdapter(cmd)<br />
    con.Close();<br />
    return da;<br />
}

karanba

Re: closing a connection

Guffa11-Nov-06 14:21

Guffa

11-Nov-06 14:21

You should definitely close the connection. If you don't, the connection object will be lying around in memory, still connected, until the garbage collector is forced to finalize it.

If you run out of available connections before you run out of memory (which will cause a garbage collection), the server will be unable to connect to the database at all until some of the open connections eventually time out.

Objects in .NET are not finalized when they go out of scope, they are just left to be garbage collected. That's why there is a Dispose method in the first place. It's used to tell objects that you are done with them, so that they can release all unmanaged resources.

To make sure that the connection is always closed properly, you should use a using block. When you leave the using block, the connection is always disposed (which also closes it).

public static SqlDataAdapter dataAdapter(SqlCommand cmd, string connectionString) {
	SqlDataAdapter da;

	using (SqlConnection con = new SqlConnection(connectionString)) {
		cmd.Connection = con;
		con.Open();
		da = new SqlDataAdapter(cmd)
	}
	return da;
}

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b { font-weight: normal; }

Re: closing a connection

karanba11-Nov-06 14:49

karanba

11-Nov-06 14:49

thanks a lot a get a clear answer.

karanba

Picture Gallery with paging

mehrdadc4811-Nov-06 10:59

mehrdadc48

11-Nov-06 10:59

Hi.
Can anyone give me an idea about it :

I want to make a picture gallery using ASP.Net2 (C#), that images are in DB.
I want using a control that has paging feature.
but Gridview is not sufficeint, because it has borders.
how can do it?

Best wishes

Re: Picture Gallery with paging

karanba12-Nov-06 1:38

karanba

12-Nov-06 1:38

Hi..
use PagedDataSource class. Here an example that shows how to use an asp:Repeater with paging next and previus page

// After you get your data by using a DataAdapter fill a Dataset<br />
   DataSet ds = new DataSet();<br />
   da.Fill(ds);<br />
<br />
// create an instance of PagedDataSource and give ds as datasource to it.<br />
   PagedDataSource pds = new PagedDataSource();           <br />
   pds.DataSource = ds;<br />
   pds.AllowPaging = true;<br />
   pds.PageSize = 10;     <br />
<br />
// take curent page from QueryString and set CurrentPageIndex <br />
   int CurPage; <br />
   if (Request.QueryString["p"] != null) CurPage = Convert.ToInt32(Request.QueryString["p"]); <br />
   else CurPage = 1;<br />
   <br />
   pds.CurrentPageIndex = CurPage-1;<br />
<br />
// bind pds to repeater and set link for next and prev links or you can simple make a loop and <br />
// write all page links down with using another repeater<br />
   myRepeater.DataSource = pds;<br />
   if (pds.Count > 0)<br />
   {<br />
      myRepeater.Visible = true;<br />
      myRepeater.DataBind();<br />
   }<br />
<br />
   if (!pds.IsFirstPage) lnkPrev.HRef = "news.aspx?p=" + Convert.ToString(CurPage - 1);<br />
   if (!pds.IsLastPage)  lnkNext.HRef = "news.aspx?p=" + Convert.ToString(CurPage + 1);

if it is not clear you could ask for more..

karanba

Re: Picture Gallery with paging

kumarrani55529-Oct-12 21:56

kumarrani555

29-Oct-12 21:56

Hi karanba,

I am not clear can you please send me a full code it is very urgent requirement.

My mail id : briteindia_kumar@hotmail.com

thanks and regards
kumar

web.config

neojapanese11-Nov-06 6:58

neojapanese

11-Nov-06 6:58

i have this web.config (below) I have a list of user names and passwords in my sql server. How have the web.config link/check the tables of my sql server to authorize the username and password?

<configuration>
<system.web>
<authentication mode="Forms">
<authorization>
<deny users="?">

Re: web.config

Guffa11-Nov-06 7:35

Guffa

11-Nov-06 7:35

Doesn't anybody ever have a look at how their posting ended up? Wink | ;)

Use the "Ignore HTML" option when you post XML code.

---
b { font-weight: normal; }

Re: web.config

RichardGrimmer13-Nov-06 2:59

RichardGrimmer

13-Nov-06 2:59

Guffa wrote:
Doesn't anybody ever have a look at how their posting ended up?

If half of em don't see "No programming questions in the lounge"......

"Now I guess I'll sit back and watch people misinterpret what I just said......"
Christian Graus At The Soapbox

Excluding controls from localization

Dario Solera11-Nov-06 4:28

Dario Solera

11-Nov-06 4:28

Is there a way to prevent Visual Studio 2005 from generating localized resources for some controls?
For example, I have a subset of controls that must not be localized, but Visual Studio keeps generating resources and adding the "meta" tag to those controls.

Thanks for any help.

________________________________________________
Personal Blog [ITA] - Tech Blog [ENG]
Developing ScrewTurn Wiki 2.0 (1.0.8 is out)

send var from client side to server side

Imran Khan Pathan11-Nov-06 1:46

Imran Khan Pathan

11-Nov-06 1:46

Hi friends

i am creating chatting application.

Here i have some problem to create appliction.

i want to get alert message to server side when user enter in chat room
and name of user.

i want to store user name in some var and send this var to server side and when this var will come then automatically alert message should be appear on server.

PLZ give me right solution

Thanks a lots in advance

Pathan

Re: send var from client side to server side

CWIZO11-Nov-06 2:12

CWIZO

11-Nov-06 2:12

What's wrong with a simple HTML form and a session variable?

--------------------------------------------------------
My portfolio & development blog
Q:What does the derived class in C# tell to it's parent?
A:All your base are belong to us!

Re: send var from client side to server side

Imran Khan Pathan11-Nov-06 2:33

Imran Khan Pathan

11-Nov-06 2:33

But how can I read that var to server side and how can i get alert message?

Plz give me some solution or link , i have no any idea to use it

Re: send var from client side to server side

Guffa11-Nov-06 6:34

Guffa

11-Nov-06 6:34

You can't display an alert message on the server, the server side of a web application doesn't have a user interface.

If you want a message on the server, you have to start a client on it so that you have a user interface, and poll the server for messages.

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need help on how to config web.config

neodeaths11-Nov-06 1:45

neodeaths

11-Nov-06 1:45

hi guys i need your advice again =)

i am currently doing a website that connect to an sql data base which works on my vb.net.

i am using sql server 2000 and vb.net 2003

i have recently decided to web host it however it doesnt work wit my existing web.config.

the below is an standard web.config i got from my web host could any one teach me the steps in configuring this pls i would be veri gratful.

www.duoultra.com/needhelp

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