ASP.NET

How to handle onselectindexchanged method in UserControl(.ascx page)

5-Jun-07 5:04

http://www.codeproject.com/useritems/VAB.asp[^]

only two letters away from being an asset

ramyasangeet5-Jun-07 3:47

ramyasangeet

5-Jun-07 3:47

Hi all,

I have an usercontrol where i gave a radiobutton list.(rblTest)
I am using this usercontrol in my aspx page.

RadioButtonList rblTest= (System.Web.UI.WebControls.RadioButtonList)myControl1.FindControl("rblTest");<br />

I need to handle onselectindexchanged method of radiobutton list in aspx page.

How to do that.
Plz give ur suggestions.

Thanks in advance

cheers

sangeet

Re: How to handle onselectindexchanged method in UserControl(.ascx page)

Mariusz Wojcik5-Jun-07 4:24

Re: Example using Interface

5-Jun-07 4:24

To do that you must first declare in your "hosting" aspx page a procedure which will handle an event:

public void RadioButtonIndexChangedProc(object sender, System.EventArgs e)<br />
{<br />
  RadioButtonList rbl = (RadioButtonList) sender;<br />
  // do what you need with data.<br />
}

Next in the user control, in the SelectedIndexChange event call that procedure:

private void RadioButtonList1_SelectedIndexChanged(object sender, System.EventArgs e)<br />
{<br />
  // get e reference to page object<br />
  WebForm1 page = (WebForm1) Page;<br />
  // call method handling Index changing<br />
  page.RadioButtonIndexChangedProc(sender, e);<br />
}

As you can see, you can access your hosting aspx page by using Page object, and by casting it to appropriate type (class of your hosting page, in my case WebForm1) you have access to all public class members.

In case of reusing an usercontrol on diffrent web pages think about implementing one base class or implementing an Interface which will handle RadioButtonIndexChange by every class which uses your usercontrol.

--
Mariusz 'mAv' Wójcik
master e-software engineer

Mariusz Wojcik5-Jun-07 4:47

Re: How to handle onselectindexchanged method in UserControl(.ascx page)

5-Jun-07 4:47

OKi,

in addition to my above answer, there is a solution which uses interface.

First, we implement an Interface:

public interface IRadioButtonListEvent<br />
{<br />
  void RadioButtonIndexChangedProc(object sender, System.EventArgs e);<br />
}

As you can see, our interface implements just one method, which will be called whenever selected item index changes.

Now, in the User Control, RadioButtonList1_SelectedIndexChanged should look like this:

private void RadioButtonList1_SelectedIndexChanged(object sender, System.EventArgs e)<br />
{<br />
  IRadioButtonListEvent iPage = (IRadioButtonListEvent) Page;<br />
  iPage.RadioButtonIndexChangedProc(sender, e);<br />
}<br />

And finally, code for hosting web page. As i mentioned above, page must implement an IRadioButtonListEvent interface.

public class WebForm1 : System.Web.UI.Page, IRadioButtonListEvent<br />
...<br />
<br />
public void RadioButtonIndexChangedProc(object sender, System.EventArgs e)<br />
{<br />
  RadioButtonList rbl = (RadioButtonList) sender;<br />
  // do whatever you need...<br />
}

--
Mariusz 'mAv' Wójcik
master e-software engineer

Not Active5-Jun-07 5:07

Re: How to handle onselectindexchanged method in UserControl(.ascx page)

5-Jun-07 5:07

Both of your solutions couple the user control and page together very strongly, which limits the flexiblity and reuse.

only two letters away from being an asset

Not Active5-Jun-07 5:14

Print button in crystal report...,

5-Jun-07 5:14

Handle the onselectindexchanged event in your user control and create an event in your user control that any page can subscribe to that reflects the onselectindexchanged event. A technique called event bubbling.

http://www.odetocode.com/Articles/94.aspx[^]

only two letters away from being an asset

Member 38798815-Jun-07 3:04

Member 3879881

5-Jun-07 3:04

Hi in my form using crystalreportviewer i dispalyed my crystal form..,
And in print button i said this code...,

report.SetDatabaseLogon("sa", "pwd", "server", "Databasename")
report.PrintToPrinter(1, False, 0, 0)

If i click the print button process is going on..,
But in between process will stop its not printing the page...,
Plz any one solve my probs...,

Magi

master detail

kvijayajyothy5-Jun-07 3:03

kvijayajyothy

5-Jun-07 3:03

how to create master detail for ADD/EDIT/Delete/Display
master data
(company code , name, mapcode)
- text box

detail data
( company detail code, fin_statdate, fin_enddate, process_status, companycode)
--grid view

vijaya

vijaya

Re: master detail

Not Active5-Jun-07 3:43

cookies : how to write page_load to cookies

5-Jun-07 3:43

If you are using 2.0 there is a DetailsView control that can be bound to the master's (possibly a grid view control) data source.

only two letters away from being an asset

Re: master detail

badgrs5-Jun-07 22:22

badgrs

5-Jun-07 22:22

Check out that ASP.NET Data Tutorial series on the asp.net site, they'll show you what you want to do.

kinsella_john5-Jun-07 1:43

kinsella_john

5-Jun-07 1:43

i am attempting to write the cookies for a landing page.

i have used the following code to analyse the presence of cookies, but dont know how to write the cookie for the page loading.

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

If Request.Cookies("Landing") Is Nothing Then
'if the name cookie does not exist ask user to enter name
Response.Redirect("landing.aspx")
Else
'if cookies already exist then show landing page
Response.Redirect("tMN_index.aspx")

End If

this seems to work in terms of directing to the landing page.. just need the cookie help....

i basically want the landing page to appear if the cookie isnt present, and then the landing page to generate the cookie if not present.

thank you

John Michael Kinsella
kinsellajohn@hotmail.com

Re: cookies : how to write page_load to cookies

Mariusz Wojcik5-Jun-07 2:05

Validation to accept only numbers!!!

5-Jun-07 2:05

As I understand, you want to know how to create a new cookie. Below is a simple example how to do that. Depends on your needs, set appropriate properties of System.Web.HttpCookie object.

Basically you simply add a new cookie object into Response.Cookies collection and that's all. Using Respose.Cookies class you can also remove or change any cookie your application creates.

Dim cookie As System.Web.HttpCookie
Dim cookieName As String
Dim cookieValue As String

cookie = New System.Web.HttpCookie(cookieName, cookieValue)
Response.Cookies.Add(cookie)

--
Mariusz 'mAv' Wójcik
master e-software engineer

rameshbhojan5-Jun-07 1:30

rameshbhojan

5-Jun-07 1:30

Hi all,
i have to validate for a textbox field in ASP.NET 2.0 using C#.
the requirement is that the textfield should accept only numbers.

i want the field such tat it should accept number..... any number of any length.....

please send me the code for the same......
the regular expression validator with the validation expression
ValidationExpression="[0-9]"
accepts only a single digit number.........
how do i make it accept any number!!!!!!!

Thanks,
Ramesh

Mariusz Wojcik5-Jun-07 1:56

5-Jun-07 1:56

Well, you should change the ValidationExpression to accept more than one character. Also, decide whether you will accept +/- sign before the number, decimal point etc. Than build proper regular expression and that's it.

I strongly recommend to read a little about "creating regular expression" on the MSDN.

And to make it works, and accept any number of digits modify ValidationExpression to "[0-9]*".

--
Mariusz 'mAv' Wójcik
master e-software engineer

Nouman Bhatti5-Jun-07 2:14

Nouman Bhatti

5-Jun-07 2:14

include * in your validation expression either at the begining or at the end.

koolprasad20035-Jun-07 2:16

koolprasad2003

5-Jun-07 2:16

hello ramesh,
try to use the following code in Javascript

function CkhInte(obj)
{
if (isNaN(obj.value))
{
alert('Please enter only digits');
return false;
}
}

hope it helps,
please rate this message if useful,
best regards,
koolprasad2003 Smile | :)

Be a good listener...Because Opprtunity knoughts softly...N-Joy

DavidNohejl5-Jun-07 4:23

DavidNohejl

5-Jun-07 4:23

Nice, but when user turn off javascript in browser it will allow him to enter incorrect input. It's necessary to do the same validation on server. ASP.NET validators do both for you.

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