Newbie: How to upload and save images using ASP.NET web forms (C#)

Hello -

I need to upload images in my web application using ASP.NET web forms
(written in C#). Since i have never done this before, i am unsure what is the
best method.

I assume there are two options:

1). Upload the images and save the files directory to the windows file
system. However, i assume this poses a security risk, as the file directory
will require write permissions.

2). Save the images (as objects?) in the SQL SERVER database.

Can anyone suggest the best way to do this? And, if possible, point me to
some sample code or artciles which explain how to do this.

Thanks!Charlie,

check out the following article:

http://www.codeproject.com/aspnet/fileupload.asp

I prefer to save files in the database but it depends on your needs.

If you need to save hundred thousands of files and decide that you want to
save them on your hard disk make sure to distribute them on different
directories. What you could do is that you assign a guid to each file and
create your directory structure accordingly.

Example:

You have five files with the following guids

0A59E8D6-0AE5-475B-8698-814C2C712029

F16CE1B1-56D0-42E6-9463-A58D553CC289

D90C27C7 -8BD9-4F47-8CFE-DE9D240AD136

370B6080-DF06-4DDE-BB5E-85264B8AE48B

861DC387-FDC7-4A4F-B0C3-9EA6734A562A

You could now create a directory like the following:

0A59E8D6\0AE5\475B\8698\814C2C712029

F16CE1B1\56D0\42E6\9463\A58D553CC289

D90C27C7 \8BD9\4F47\8CFE\DE9D240AD136

370B6080\DF06\4DDE\BB5E\85264B8AE48B

861DC387\FDC7\4A4F\B0C3\9EA6734A562A

HTHs

Daniel

"charliewest" <charliewest@.discussions.microsoft.com> schrieb im Newsbeitrag
news:E6DD7087-DC4F-4E78-9741-0EF7F76883B6@.microsoft.com...
> Hello -
> I need to upload images in my web application using ASP.NET web forms
> (written in C#). Since i have never done this before, i am unsure what is
> the
> best method.
> I assume there are two options:
> 1). Upload the images and save the files directory to the windows file
> system. However, i assume this poses a security risk, as the file
> directory
> will require write permissions.
> 2). Save the images (as objects?) in the SQL SERVER database.
> Can anyone suggest the best way to do this? And, if possible, point me to
> some sample code or artciles which explain how to do this.
> Thanks!

Newbie: How to start

Hi

I have a html page with a form. How can I start turning this into an asp.net
page to including validation and submit processing?

Thanks

Regards

YahyaHey,
Well first things first. Create a web project if you are using Visual
Studio. If not .. you will need to work a bit more and create a virtual
directory and an aspx page. Similar to a normal html page but with lot of
extra tags... Get yourself a good asp.net book.
Now copy the html body and paste it in the aspx file. When you double a html
object like button or image it will be converted to equivalent web control
Have fun learning.. its fun..

Hermit Dave

"John" <john@.nospam.infovis.co.uk> wrote in message
news:%23neTBVQvDHA.2464@.TK2MSFTNGP12.phx.gbl...
> Hi
> I have a html page with a form. How can I start turning this into an
asp.net
> page to including validation and submit processing?
> Thanks
> Regards
>
> Yahya

newbie: HTTP and URIs

Hi,
I'm quite new to this, so please excuse trivial questions:
- Is there any function (int the .net framework) that gives me an
enumeration of all URIs in a http stream (passed as e.g. a string)? If not,
how could I achieve such a thing?
- Really trivial, but to make sure: What does the string "/.../" in an URL
mean? I'd suspect some directory operation, but I dunno exactly...
- I'm currently using the HttpUtility.UrlDecode() function to decode some
http URIs and one thing stroke me in particular: The string
[...]"test.exe?/c+xtsr" is decoded to "test.exe?/c xtsr", missing the "+".
When I use the System.Uri class for the decoding the "+" remains...Does
anyone know why?
Thanks for reading till end and thanks in advance
PeterHi Peter,
No question is trivial if you don't know the answer to it! :)

> - Is there any function (int the .net framework) that gives me an
> enumeration of all URIs in a http stream (passed as e.g. a string)? If
> not,
> how could I achieve such a thing?
Not sure what you mean by this. You can find URLs in an HTML document by
using Regular Expressions. The HTML document is a string.

> - Really trivial, but to make sure: What does the string "/.../" in an
> URL
> mean? I'd suspect some directory operation, but I dunno exactly...
Is that the exact string you saw in a URL? I've never seen it before.
The following link to the W3C should help":
http://www.gbiv.com/protocols/uri/rfc/rfc3986.html

> - I'm currently using the HttpUtility.UrlDecode() function to decode some
> http URIs and one thing stroke me in particular: The string
> [...]"test.exe?/c+xtsr" is decoded to "test.exe?/c xtsr", missing the "+".
> When I use the System.Uri class for the decoding the "+" remains...Does
> anyone know why?
The "+" character is a URL-Encoding for a space (which is an illegal URL
character).
HTH,
Kevin Spencer
Microsoft MVP
.Net Developer
What You S Is What You Get.
"Peter Schmitz" <PeterSchmitz@.discussions.microsoft.com> wrote in message
news:A10E415D-10FA-4F56-BA27-D950B8F6BCDA@.microsoft.com...
> Hi,
> I'm quite new to this, so please excuse trivial questions:
> - Is there any function (int the .net framework) that gives me an
> enumeration of all URIs in a http stream (passed as e.g. a string)? If
> not,
> how could I achieve such a thing?
> - Really trivial, but to make sure: What does the string "/.../" in an
> URL
> mean? I'd suspect some directory operation, but I dunno exactly...
> - I'm currently using the HttpUtility.UrlDecode() function to decode some
> http URIs and one thing stroke me in particular: The string
> [...]"test.exe?/c+xtsr" is decoded to "test.exe?/c xtsr", missing the "+".
> When I use the System.Uri class for the decoding the "+" remains...Does
> anyone know why?
> Thanks for reading till end and thanks in advance
> Peter
>

newbie: HTTP and URIs

Hi,

I'm quite new to this, so please excuse trivial questions:

- Is there any function (int the .net framework) that gives me an
enumeration of all URIs in a http stream (passed as e.g. a string)? If not,
how could I achieve such a thing?

- Really trivial, but to make sure: What does the string "/.../" in an URL
mean? I'd suspect some directory operation, but I dunno exactly...

- I'm currently using the HttpUtility.UrlDecode() function to decode some
http URIs and one thing stroke me in particular: The string
[...]"test.exe?/c+xtsr" is decoded to "test.exe?/c xtsr", missing the "+".
When I use the System.Uri class for the decoding the "+" remains...Does
anyone know why?

Thanks for reading till end and thanks in advance

PeterHi Peter,

No question is trivial if you don't know the answer to it! :)

> - Is there any function (int the .net framework) that gives me an
> enumeration of all URIs in a http stream (passed as e.g. a string)? If
> not,
> how could I achieve such a thing?

Not sure what you mean by this. You can find URLs in an HTML document by
using Regular Expressions. The HTML document is a string.

> - Really trivial, but to make sure: What does the string "/.../" in an
> URL
> mean? I'd suspect some directory operation, but I dunno exactly...

Is that the exact string you saw in a URL? I've never seen it before.

The following link to the W3C should help":

http://www.gbiv.com/protocols/uri/rfc/rfc3986.html

> - I'm currently using the HttpUtility.UrlDecode() function to decode some
> http URIs and one thing stroke me in particular: The string
> [...]"test.exe?/c+xtsr" is decoded to "test.exe?/c xtsr", missing the "+".
> When I use the System.Uri class for the decoding the "+" remains...Does
> anyone know why?

The "+" character is a URL-Encoding for a space (which is an illegal URL
character).

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
What You Seek Is What You Get.

"Peter Schmitz" <PeterSchmitz@.discussions.microsoft.com> wrote in message
news:A10E415D-10FA-4F56-BA27-D950B8F6BCDA@.microsoft.com...
> Hi,
> I'm quite new to this, so please excuse trivial questions:
> - Is there any function (int the .net framework) that gives me an
> enumeration of all URIs in a http stream (passed as e.g. a string)? If
> not,
> how could I achieve such a thing?
> - Really trivial, but to make sure: What does the string "/.../" in an
> URL
> mean? I'd suspect some directory operation, but I dunno exactly...
> - I'm currently using the HttpUtility.UrlDecode() function to decode some
> http URIs and one thing stroke me in particular: The string
> [...]"test.exe?/c+xtsr" is decoded to "test.exe?/c xtsr", missing the "+".
> When I use the System.Uri class for the decoding the "+" remains...Does
> anyone know why?
> Thanks for reading till end and thanks in advance
> Peter

newbie: HTML controls vs Web controls

Hello,
I am learning .NET 2.0. And I have a question: when to use web-controls and
when to use HTML controls?
/RAM/Hi,
R.A.M. wrote:
> Hello,
> I am learning .NET 2.0. And I have a question: when to use web-controls an
d
> when to use HTML controls?
> /RAM/
The System.Web.UI.HtmlControls namespace is for HTML controls, in the
sense that they are declared on the page using standard HTML tags, for
example "input", "select", "textarea", etc...
The System.Web.UI.WebControls namespace is for ASP.NET controls, which
are declared on the page with an "asp:" prefix, for example "asp:Checkbox".
The different is that in the first case, they're client-side controls.
You use them on the server in order to set attributes, scripts, etc...
which are executed on the client. In the second case, however, (and
while you can also influence the way they will be rendered on the
client), the events you wire them to are executed on the server
(involving a postback).
HTH,
Laurent
--
Laurent Bugnion, GalaSoft
Software engineering: http://www.galasoft-LB.ch
Private/Malaysia: http://mypage.bluewin.ch/lbugnion
Support children in Calcutta: http://www.calcutta-espoir.ch
It depends on what you are more comfortable with. If you come from Windows
application background, you will find that web controls are more friendly
and they are a less dramatic change from your previous experience.. If you
come from html background you will like html controls. As you master your
asp.net skills, you will likely lean more towards html controls as they give
you better control over client-side functionality.
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]
"R.A.M." <r_ahimsa_m@.poczta.onet.pl> wrote in message
news:ejgq05$8h1$1@.news.onet.pl...
> Hello,
> I am learning .NET 2.0. And I have a question: when to use web-controls
> and when to use HTML controls?
> /RAM/
>

newbie: HTML controls vs Web controls

Hello,
I am learning .NET 2.0. And I have a question: when to use web-controls and
when to use HTML controls?
/RAM/Hi,

R.A.M. wrote:

Quote:

Originally Posted by

Hello,
I am learning .NET 2.0. And I have a question: when to use web-controls and
when to use HTML controls?
/RAM/

The System.Web.UI.HtmlControls namespace is for HTML controls, in the
sense that they are declared on the page using standard HTML tags, for
example "input", "select", "textarea", etc...

The System.Web.UI.WebControls namespace is for ASP.NET controls, which
are declared on the page with an "asp:" prefix, for example "asp:Checkbox".

The different is that in the first case, they're client-side controls.
You use them on the server in order to set attributes, scripts, etc...
which are executed on the client. In the second case, however, (and
while you can also influence the way they will be rendered on the
client), the events you wire them to are executed on the server
(involving a postback).

HTH,
Laurent
--
Laurent Bugnion, GalaSoft
Software engineering: http://www.galasoft-LB.ch
Private/Malaysia: http://mypage.bluewin.ch/lbugnion
Support children in Calcutta: http://www.calcutta-espoir.ch
It depends on what you are more comfortable with. If you come from Windows
application background, you will find that web controls are more friendly
and they are a less dramatic change from your previous experience.. If you
come from html background you will like html controls. As you master your
asp.net skills, you will likely lean more towards html controls as they give
you better control over client-side functionality.

--
Eliyahu Goldin,
Software Developer & Consultant
Microsoft MVP [ASP.NET]

"R.A.M." <r_ahimsa_m@.poczta.onet.plwrote in message
news:ejgq05$8h1$1@.news.onet.pl...

Quote:

Originally Posted by

Hello,
I am learning .NET 2.0. And I have a question: when to use web-controls
and when to use HTML controls?
/RAM/
>

newbie: I wonder if this is possible in asp.net 2.0

Hey

asp.net 2.0

As far as I know it's possible to search the users registrered at a asp.net
2.0 web portal using either username or e-mail.

But what about the custom profile properties which can be configured in
web.config? Can they be searched too? I guess it can by using foreach loop
and test the contents on every user object.. but I thought maybe there was a
cleaner and faster way to do it...

Lets say for example these are custom profile settings in web.config. any
suggestion on how to search them? Lets say the search should return all
users containing the phrase "Lets" in lastname? or all users of a specific
gender?
<profile enabled="true">
<properties>
<add name="FirstName" type="string"/>
<add name="LastName" type="string"/>
<add name="Gender" type="string"/>
<add name="BirthDate" type="DateTime"/>
</properties>
</profile>

Best RegardsThis article should help, and even fleshes out some of the sample code
provided by one of the MS people for it:

http://www.eggheadcafe.com/articles/20060731.asp
Peter
--
Co-founder, Eggheadcafe.com developer portal:
http://www.eggheadcafe.com
UnBlog:
http://petesbloggerama.blogspot.com
"Jeff" wrote:

Quote:

Originally Posted by

Hey
>
asp.net 2.0
>
As far as I know it's possible to search the users registrered at a asp.net
2.0 web portal using either username or e-mail.
>
But what about the custom profile properties which can be configured in
web.config? Can they be searched too? I guess it can by using foreach loop
and test the contents on every user object.. but I thought maybe there was a
cleaner and faster way to do it...
>
Lets say for example these are custom profile settings in web.config. any
suggestion on how to search them? Lets say the search should return all
users containing the phrase "Lets" in lastname? or all users of a specific
gender?
<profile enabled="true">
<properties>
<add name="FirstName" type="string"/>
<add name="LastName" type="string"/>
<add name="Gender" type="string"/>
<add name="BirthDate" type="DateTime"/>
</properties>
</profile>
>
Best Regards
>
>
>