ASP.NET

Dynamic link in Detailsview disappears on update

3-Mar-09 15:34

There is no such thing as a content or master page on the client, just a page. If you output script to call the method, and it's there, then it will be called.

Christian Graus

Driven to the arms of OSX by Vista.

Ekjon3-Mar-09 11:49

Ekjon

3-Mar-09 11:49

I have a detailsview showing data from 2 tables. One of the data fields in the detailsview is a link for another page.
The link is created using <a id=.. runat=server target="_blank>..etc
In the Page_Load, I am using code like -

DetailsViewRow row = dvParams.Rows[0];<br />
        tbox = (TextBox)(row.FindControl("txtEqpID"));<br />
        anchorSpEquipment = (HtmlAnchor)(row.FindControl("lnkSpEquipment"));<br />
        anchorSpEquipment.HRef = "....."<br />

It works fine but if edit-update/cancel is clicked, the link goes away, leaving only the text. So, I put the same code above in the detailsview PreRender event handler and it started to work fine.
But to edit this field(in edit mode), I have a dropdown list with values populated from another table in the database. To do that - I needed to put code in the PreRenderagain.
As soon as I did that, the previous code is giving me null reference on the HtmlAnchor object. I tried to move the code in other EventHandlers like ModeChanging,ItemCommand - but everywhere it does the same...even in the Page_load if I move it outside of the !Page.IsPostBack, it gives the error.

Any ideas? Thanks.

Re: Dynamic link in Detailsview disappears on update

Christian Graus3-Mar-09 15:11

Re: Dynamic link in Detailsview disappears on update

3-Mar-09 15:11

This looks nasty, why not ust define the link in your aspx ?

Christian Graus

Driven to the arms of OSX by Vista.

Ekjon3-Mar-09 19:12

Ekjon

3-Mar-09 19:12

I tried that as well - and it's giving me the same error.
Is there any other way?
Thanks.

Re: Dynamic link in Detailsview disappears on update

Ekjon4-Mar-09 7:53

Ekjon

4-Mar-09 7:53

I got it figured out, thanks Christian.
I did this: in the DataBound event handler, to filter the exception - I used if:

<br />
if (dvParams.CurrentMode != DetailsViewMode.Edit)<br />
        {<br />
            DetailsViewRow row = dvParams.Rows[0];<br />
            tbox = (TextBox)(row.FindControl("txtEqpID"));<br />
            HtmlAnchor anchorSpEquipment = (HtmlAnchor)(row.FindControl("lnkSpEquipment"));<br />
            anchorSpEquipment.HRef = "~/EquipmentDetails.aspx?Station=" + stationID + "&ColType=" + collType + "&Param=" + paramID + "&ID=" + tbox.Text;<br />
        }<br />

what method to use for pushing page updates to page/iframes?

nakins3-Mar-09 10:24

nakins

3-Mar-09 10:24

I've been trying to create a simple method to update iframe content via a mix of asp.net and javascript. I can set a meta refresh, but that makes for a lot of traffic. I had created an aspx page that loaded into a hidden iframe (which did a meta refresh every 60 sec). This aspx would connect to a database and check for updated content, a "yes" or "no" in a table field. If "yes" then it would spit out some javascript code to reload the appropriate iFrame. But, there seems to be a couple of problem with this in that, one, the hidden aspx doesn't seem to load or execute but once. The other is that the javascript code isn't reloading the appropriate iframe.

I would think this approach should work. I probably don't have it coded correctly. But, what I want to ask was if this method is a reasonable approach? Is there a better way of doing content updates without a lot of overhead code loading into the browser?

Thanks

Re: what method to use for pushing page updates to page/iframes?

Christian Graus3-Mar-09 11:02

How to create differetnt subdomains through ASP.NET C# ?

3-Mar-09 11:02

If you want the page to refresh itself, a js timer is the only way to do that. If only part of the page refreshes, you can use AJAX to make requests for that data.

Christian Graus

Driven to the arms of OSX by Vista.

King Shez3-Mar-09 9:27

King Shez

3-Mar-09 9:27

HI

Can any one let me know, how to create different subdomains using ASP.NET C#, e.g if My URL is www.Mydomain.com if any user gets registered then the users own subdomain get created e.g. www.UserName.MyDomain.com, can any one let me know how to do it , can any one provide me any code snippet, thanks in advance,

regards,

Tippu

Re: How to create differetnt subdomains through ASP.NET C# ?

Christian Graus3-Mar-09 9:40

Re: How to create differetnt subdomains through ASP.NET C# ?

3-Mar-09 9:40

The only code that could do this, is URL rewriting. Look at HTTP handlers.

Christian Graus

Driven to the arms of OSX by Vista.

King Shez3-Mar-09 10:27

King Shez

3-Mar-09 10:27

Can you send me any code?

Re: How to create differetnt subdomains through ASP.NET C# ?

Christian Graus3-Mar-09 11:01

Re: How to create differetnt subdomains through ASP.NET C# ?

3-Mar-09 11:01

No, I can't. I know that ASP.NET as it's typically used, plainly can't change a URL. URL rewriting can, and I know where to look for that info in ASP.NET. That's why my reply was tentative. I've not done it, I just know enough about ASP.NET to know where I'd look, so I gave you some keywords to type into google. Good luck.

Christian Graus

Driven to the arms of OSX by Vista.

Yusuf3-Mar-09 11:51

Yusuf

3-Mar-09 11:51

How about you read about this and write an artice with source code?

Yusuf

M.Ambigai3-Mar-09 7:11

3-Mar-09 7:11

Hello sir,

On registering our details to a new website, we recieve a confirmation mail along with user name, and password. How is it possibile? How can i do so using c#?

Re: Email

Abhishek Sur3-Mar-09 8:58

Abhishek Sur

3-Mar-09 8:58

Nothing special... just during registration enter all the info into table, and leave the active field of the database as false. Send a confirmation mail with one transaction id, which you hold to the database upto a certain time... When the user clicks on the link you have provided with the email, it opens up a new page for activation, you can get the transaction id through query string or else ask the user to enter....

If the user enters correct transaction id, you can update the active bit field in the database and make the user active....

Simple.. Rose | [Rose]

Abhishek Sur

My Latest Articles
Basics on LINQ and Lambda Expressions

Create .NET Templates

Re: Email

Abhijit Jana3-Mar-09 18:54

Abhijit Jana

3-Mar-09 18:54

Check This[^] Post. That is similar post like you. You will get a better idea from that.

cheers,
Abhijit
CodeProject MVP

Re: Email

Sneha Bisht3-Mar-09 19:06

Sneha Bisht

3-Mar-09 19:06

in class mail
public static void SendMail(string MailTo, string MailFrom, string Subject,String MailBody)
{
System.Net.Mail.MailMessage objMailMessage = new System.Net.Mail.MailMessage(MailFrom, MailTo);
objMailMessage.Subject = Subject;
objMailMessage.IsBodyHtml = true;
objMailMessage.Body = MailBody;
SmtpClient objsmtp = new SmtpClient();
objsmtp.Send(objMailMessage);

}

in aspx.cs call Sendmail function
string Subject="Hoe to send mail";
strimg MailBody=" Dear user your Username=" +username +"";
"password ="+ password;
SendMail(to@mail.com, from@mail.com, Subject,MailBody)

and also set smtp setting in webconfig

SHA1

M.Ambigai3-Mar-09 7:07

3-Mar-09 7:07

Hello sir,
I have to encrypt my password.I used the following statement.

string pswd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPswd.Text, SHA1 );

Error message is "SHA1 is a type not a variable".
How can i do?

Kelly Herald3-Mar-09 8:13

Kelly Herald

3-Mar-09 8:13

The second parameter is expecting a string not an enum.

Try this:

string pswd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPswd.Text, <code>"SHA1"</code> );

Kelly Herald
Software Developer

M.Ambigai3-Mar-09 23:58

3-Mar-09 23:58

Sir,
How can i decode it again to login?

Kelly Herald4-Mar-09 4:33

Kelly Herald

4-Mar-09 4:33

A hash is one way. It cannot be decrypted. However, you can just compare the newly generated hash with the one stored like below.

string storedpswd = ... // retrieve stored password from your storage location
string newpswd = FormsAuthentication.HashPasswordForStoringInConfigFile(txtPswd.Text, "SHA1" );
if (newpswd == storedpswd)
{
   // passwords match
}else
{
   // passwords do not match
}

Kelly Herald
Software Developer

M.Ambigai4-Mar-09 6:32

4-Mar-09 6:32

Sir,
To encrypt and also decrypt what algorithm can be used