ASP.NET Discussion Boards

galatia27-Sep-06 8:26

27-Sep-06 8:26

Hi,
i want some help with exporting detailsview to excell.I m working on a web application and i have a search page and a result page.The result page demonstrates the results of the search in a detailsview and i want to export it to excell.I use a button for that, the code of the button is :

protected void Button1_Click(object sender, EventArgs e)
{
Response.Clear();
Response.AddHeader("content-disposition", "attachment;filename=FileName.xls");
Response.Charset = "";

// If you want the option to open the Excel file without saving then
// comment out the line below
//Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.ContentType = "application/vnd.xls";
System.IO.StringWriter stringWrite = new System.IO.StringWriter();
System.Web.UI.HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
DetailsView1.RenderControl(htmlWrite);
Response.Write(stringWrite.ToString());
Response.End();

}

public override void VerifyRenderingInServerForm(Control control)
{
/* Confirms that an HtmlForm control is rendered for the specified ASP.NET
server control at run time. */
}

But i have an error message :
"RegisterForEventValidation can only be called during Render();
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: RegisterForEventValidation can only be called during Render();"

Any ideas?????It's very important

Thanks galatia

galatia

Re: export detailsview to excell

minhpc_bk27-Sep-06 19:49

minhpc_bk

27-Sep-06 19:49

Clickety[^]

Viewing a single content page in multiple master pages

Jell Ellis27-Sep-06 8:12

Jell Ellis

27-Sep-06 8:12

I am building a site (using Visual Web Developer and C#) that uses master pages to display content pages (defined in .aspx files) in defined contentplaceholders.

One master page displays either content page A or B. I would like to develop a second master page that displays both A and B in separate ContentPlaceHolders.

How do I link an aspx content page to contentplaceholders in more than one master page?

Any help appreciated!

Jell

Re: Viewing a single content page in multiple master pages

Not Active27-Sep-06 8:30

Not Active

27-Sep-06 8:30

I believe you have the concept reversed. You don't assign content pages to master pages but rather assign a master page to content pages.

only two letters away from being an asset

Re: Viewing a single content page in multiple master pages

Jell Ellis27-Sep-06 10:59

Jell Ellis

27-Sep-06 10:59

Mark,

Thanks for your reply.

You are are right, every content page has to say which master page (and which placeholder(s)) it is assigned to, but that is the root of the problem.

The assignment is done within the content page (using MasterPageFile=xxx in the page directive), and you can only specify one master page. So if I want to use the same content page in different master pages then I am stuck, as this would require two master page assignments in the page directive.

I appreciate that I could copy all the content page code into a separate file, with a different master page assignment, but that seems inelegant and prone to errors.

Jell

Jell

Re: Viewing a single content page in multiple master pages

Guffa27-Sep-06 19:06

Guffa

27-Sep-06 19:06

You don't.

Make the content pages into user controls, and create two sets of content pages that displays the user controls.

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

Re: Viewing a single content page in multiple master pages

Jell Ellis28-Sep-06 3:38

Jell Ellis

28-Sep-06 3:38

Guffa,

This was the answer I needed - works a treat!

Thanks for your help.

Jell

Jell

HELP

Polymorpher27-Sep-06 7:54

Polymorpher

27-Sep-06 7:54

Hey guys I have to get the basics of asp using vb.net within the next 3 days...I should be able to do it...I have learned 12+ languages, and I already know VB.Net...Im just having some trouble with designing the forms, How do I place controls where I want them? If you have any sugestions please let me know.

Thank You!

Pablo
Sometimes I think there's no reason to get out of bed . . . then I feel wet, and I realize there is.

Re: HELP

Kschuler27-Sep-06 8:25

Kschuler

27-Sep-06 8:25

When you are looking at your website in the designer (the .aspx not the .aspx.vb) you can look at either the design or the source. You can toggle between the two views by clicking on either "design" or "source" at the bottom left of the screen. The source view shows the html of the page. You will want to use html to create tables to oranize your controls on the page.

Here are some sites that might help you with html:
The Bare Bones Guide to HTML[^]

Tables in HTML Documents[^]

HTML Tag Quick Reference[^]

Re: HELP

Not Active27-Sep-06 8:27

Not Active

27-Sep-06 8:27

Polymorpher wrote:
I have to get the basics of asp using vb.net

You can't do asp with VB.NET, you can however use it for asp.net

I'd recommend this book Teach Yourself ASP.NET in 24 Hours[^]

Then you would have two whole days to read How to get an answer to your question

3. Keep the subject line brief, but descriptive. eg "File Serialization problem"

only two letters away from being an asset

Re: HELP

Polymorpher27-Sep-06 8:30

Polymorpher

27-Sep-06 8:30

LOL, sry about that...guess I got in a bit of a rush. Thanks for the link, this looks like what I'm looking for.

Pablo
Sometimes I think there's no reason to get out of bed . . . then I feel wet, and I realize there is.

Sample master pages

digsy_27-Sep-06 7:38

digsy_

27-Sep-06 7:38

Does anyone know where I can find sample master pages ?

Its more the look & feel that I'm trying to find - I'm OK with producing the code, its the colors, fonts & icons that I always have problems with.

Thanks

Re: Sample master pages

minhpc_bk27-Sep-06 19:48

minhpc_bk

27-Sep-06 19:48

You might want to check out the starter kits[^]

Custom email class

shapper27-Sep-06 7:21

shapper

27-Sep-06 7:21

Hello,

I am trying to create a custom email class but this one is the first class I create.
Where can I find some tips of how to create classes?

I have various problems. For example, there are properties which, when not defined by the user it won't be used on my code:

Public WriteOnly Property Priority() As System.Net.Mail.MailPriority
Set(ByVal value As System.Net.Mail.MailPriority)
If _Priority = value Then
Return
End If
_Priority = value
End Set
End Property

Is the user doesn't set Priority then in my function I will not have:

email.Priority = ...

Of course I could use an IF condition around "email.Priority = ..." but I am not sure if that's the way.

Thanks,
Miguel

Re: Custom email class

Not Active27-Sep-06 8:16

Not Active

27-Sep-06 8:16

Set Priority = System.Net.Mail.MailPriority.Normal as the default and use it regardless of whether the user sets it differently.

only two letters away from being an asset

Re: Custom email class

Kschuler27-Sep-06 11:09

Kschuler

27-Sep-06 11:09

Another way you could handle this situation is to not have priority as a property but as an optional parameter for the method or function that ends up actually sending the email. Optional parms have to the last parms of the method and have to have a default set. The method header would look something like this:

Public SendMyEmail(ByVal strEmailMessage as String, Optional ByVal strPriority as System.Net.Mail.MailPriority = Net.Mail.MailPriority.Normal)

(Of course, you would probably have a number of other parms before the optional one like who the email is to be sent to, from, CC, BCC, and so on.)

Hope this gives you some ideas to work from.

How can i fix this OleDbException error?

keroed_edmond27-Sep-06 6:57

keroed_edmond

27-Sep-06 6:57

i installed an asp.net application onmy machine and tested it and works fine it connected to my access database and retrieve the files correctly. but when i tried to access the website from another machine this works ok too except when i try to connect to the database to capture data i get the following error

Exception Details: System.Data.OleDb.OleDbException: Cannot open database, it may not be a database that your application recognizes, or the file may be corrupt

the source error: points to my code that connects to my password protected database and retrieves soem data

???? is it that i need to try and instal mdac on the pc i am using to browse via the network ????

kenny

Send HTML page by Email.

shapper27-Sep-06 6:13

shapper

27-Sep-06 6:13

Hello,

I want to send a HTML page of my web site by email.

Is this possible in Asp.Net 2.0?

Thanks,

Miguel

Re: Send HTML page by Email.

Jim Conigliaro27-Sep-06 9:55

Jim Conigliaro

27-Sep-06 9:55

Use the page's RenderControl method:

System.Text.StringBuilder builder = new System.Text.StringBuilder();<br />
System.IO.StringWriter writer = new System.IO.StringWriter(builder);<br />
HtmlTextWriter html = new HtmlTextWriter(writer);<br />
RenderControl(html);

This places the page's HTML into the StringBuilder variable, builder. The string can then be set as the body of your email message. Please note, however, that if there are any relative references (such as to a style sheet or an image or a link to another page) you will need to convert them to fully qualified URLS.

Jim Conigliaro
jconigliaro@ieee.org
http://www.jimconigliaro.com

Converting C# Application to WEB Enabled with ASP.NET .

unitecsoft27-Sep-06 5:30

unitecsoft

27-Sep-06 5:30

I have an application written in C# with SQL server Dbase . Would like to convert the same application to Web Enabled as ASP.NET without having to Re-write the code again in ASP.NET . Can anyone help in that ?

UnitecSoft

We will Either Find A Way , Or We Will Make One .

Re: Converting C# Application to WEB Enabled with ASP.NET .

Colin Angus Mackay27-Sep-06 5:47

Colin Angus Mackay

27-Sep-06 5:47

ASP.NET provides just the framework to provide a web interface for your application. Your application is written in C#, the language, which is independent of how the application presents itself to the outside world.

If you have designed your application properly by separating out the presentation layer from the business logic and database layers then it should be easy to replace the front end your application currently has with an ASP.NET front end.

The bottom line is that you will have to write some ASP.NET code, but this will be in addition to what is already there.

If you have designed your application badly then you will have to re-write it and no one can help you with that.

Upcoming Scottish Developers events:
* UK Security Evangelists On Tour (2nd November, Edinburgh)
* Developer Day Scotland: are you interested in speaking or attending?
My: Website | Blog

Re: Converting C# Application to WEB Enabled with ASP.NET .

unitecsoft27-Sep-06 7:09

unitecsoft

27-Sep-06 7:09

Thanx for your response , I believe the application is written in a good structure , UI is seperate from the business logic because it already written for two user langauges with same functions on same froms , just the UI can be swaped ( Hot swap ) while the application is running to show english language UI Or right side language UI . events in all controls do not contain business code , they tend to call functions or methods carrying that code , no control event holds more than one line of code .

May be the reason of my quastion is that I am starting web applications for the first time with ASP.NET .

UnitecSoft

How to play audio and video files in an aspx page

Meax27-Sep-06 5:21

Meax

27-Sep-06 5:21

can anyone of you direct me to a tutorial to do this.

thanks

How to use asp:radio button in datagrid without postback and only single selection

BalasahebK27-Sep-06 5:03

BalasahebK

27-Sep-06 5:03

:|How to use asp:radio button control in datagrid without any postback and
whenever I check first radio button in first row of grid, none other should be checked. If second RDB in second row of grid is checked, first should be unchecked.

can somebody suggest for this code?........Please

Balasaheb

Image not being displayed in mozila/firefox..

ArunKumarParthiban27-Sep-06 4:51

ArunKumarParthiban

27-Sep-06 4:51

Hi All,

I am unable to display an image in mozilla, when i give the path as "drive:/folder1/abc.jpg". any solution plz?

I tried both:
src="file:///D:/sweets/MHCPNWWebApp/Images/prod_img04.jpg" and also src="D:/sweets/MHCPNWWebApp/Images/prod_img04.jpg"

In both the case the image is not displayed in Mozilla or Firefox..

But when the image path is directly typed in browser image gets displayed..

need help please...

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