Re: Ajax in asp.net - ASP.NET Discussion Boards

Michael Sync28-Aug-07 20:37

28-Aug-07 20:37

Hello All,

What is the best practice for storing images for web application?

Let's say I wanna develop the web photo gallery application like Flickr. Where should I store the images that uploaded by user? Database or File?

I think storing the images in the database would be good for security reason but there is more cost for rendering the image.

If we store the image directly to file system, we have to give the "write permission" to the user so it might cause the security problem..

So, I'm not very sure where those image should be saved. It would be great if you all can suggest me..

Thanks in advance..

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

If you want to thank me for my help, please vote my message by clicking one of numbers beside "Rate this message". Why vote? Plz Read it here. Thank you.

Re: Best practice for storing images

Christian Graus28-Aug-07 20:51

Christian Graus

28-Aug-07 20:51

Store paths in the DB, then you can just pass paths around to img tags to show the images in your app.

You don't have to give any sort of write permission, you get the images passed into your web app, and your app writes them to the location, the user has no such permission on the folder.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: Best practice for storing images

Michael Sync28-Aug-07 21:50

Michael Sync

28-Aug-07 21:50

Thanks for your reply. Chrisian.

Christian Graus wrote:
Store paths in the DB, then you can just pass paths around to img tags to show the images in your app.

I think I need to repharse my sentense.

Let's say the application that I'm working on is Photo Gallery. So, there will be one feature that allows the users upload their images. My question is that where I should store those uploaded images. Should I store the image as binary in database or store the path in database and store the images in upload folder?

If I store the path ( "./upload/user1/album/image1.jpg") in database, the image ("image1.jpg") has to be uploaded under "/upload/user1/album/" folder. So, I will need to give "write permission" to "upload" folder or "/upload/user1/" folder.

Is it good way to do?

How to add attributes to form tag of master page

Sumithra Guturi28-Aug-07 20:34

Sumithra Guturi

28-Aug-07 20:34

Hi,
Can anyone help me to add attributes to form tag of master page from child page?
I am able to access the control using the following piece of code:

this.Master.FindControl("MasterForm")

But i am not able to add attributes.

I want to add "action", "target" attributes from child page to master page.

It's very urgent...

Thanks in advance

Sumithra Guturi

Error when exporting to PDF

samerh28-Aug-07 19:47

samerh

28-Aug-07 19:47

I’m encountering a new kind of problem using Crystal Report for .Net 2005.
If I export a report in a Word or Excel format it works fine but when I set the content type to PDF I get the Adobe PDF splash screen and nothing happens, the content of the web page doesn’t change.

This is a summary of the code I’m currently using (that used to work with CR 8.5):

Dim crExportOptions As ExportOptions
crExportOptions = ExportFileFormats.PDF

Response.ClearContent()
Response.ClearHeaders()

Response.ContentType = "application/pdf"
crExportOptions.FormatOptions = New PdfRtfWordFormatOptions
crExportOptions.ExportFormatType = ExportFormatType.PortableDocFormat

Dim req As ExportRequestContext = New ExportRequestContext
req.ExportInfo = crExportOptions

Dim st As System.IO.Stream
st = ReportDocument.FormatEngine.ExportToStream(req) -- (ReportDocument is a crystal reports filled with all the required parms and data. Works with Word and Excel)

Dim b(st.Length) As Byte
st.Read(b, 0, st.Length)
Response.BinaryWrite(b)

Response.End()

Ajax in asp.net

IamAmit28-Aug-07 19:28

IamAmit

28-Aug-07 19:28

Hello friends and gud morning..
I am newer to asp.net and i want to implement ajax technology in my applications. So Please give me links to understand simple ajax implementations and there use in web applications

Re: Ajax in asp.net

Imran Khan Pathan28-Aug-07 19:34

Imran Khan Pathan

28-Aug-07 19:34

Get It . Ajax

Best Regard

Pathan

---------------------------------------------------

Re: Ajax in asp.net

Christian Graus28-Aug-07 20:52

Christian Graus

28-Aug-07 20:52

Depends what you mean by 'simple. You've been given a link to the Microsoft AJAX library, that will give you some AJAX functionality without writing any AJAX code. Writing your own simple AJAX code would not involve using this library at all.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

asp.Net Login Controls Customization

nitpall28-Aug-07 18:08

nitpall

28-Aug-07 18:08

Hi,
I added some extra fields in the login controls,altered the respective tables,procedures but unable to pass parameters to the procudres due to this getting exception "procedure expecting parameter..."
Please help me to get out from this problem

nit

Is the Repeater control able to handle input?

BillW4228-Aug-07 18:03

BillW42

28-Aug-07 18:03

Is the Repeater control able to handle input? This is the code I am using right now. I am not able to get the values from the TextBox fields.

I am trying to populate a series of TextBoxes that will contain user input for the related process field. I am using ASP.NET 2.0 and C#.

Thanks!

Client Side:
<asp:Repeater ID="rptrProccessInput" runat="server">
<ItemTemplate>
Process: <%# DataBinder.Eval(Container.DataItem, "process") %> Target:<asp:TextBox runat="server" ID="txtTarget"></asp:TextBox> Comment:<asp:TextBox runat="server" ID="txtComment"></asp:TextBox><br>
</ItemTemplate>
</asp:Repeater>

Server Side:
protected void Button2_Click(object sender, EventArgs e)
{
TextBox txtTarget = null;
TextBox txtComment = null;

foreach (RepeaterItem ctrl in rptrProccessInput.Items)
{
txtTarget = (TextBox)ctrl.FindControl("txtTarget");
txtComment = (TextBox)ctrl.FindControl("txtComment");

Debug.WriteLine(txtTarget.Text +":"+ txtComment.Text);
}
}

Re: Is the Repeater control able to handle input?

Imran Khan Pathan28-Aug-07 19:19

Imran Khan Pathan

28-Aug-07 19:19

You are not passing values to Textbox

try this
<asp:TextBox runat="server" ID="txtTarget" Text='<%# DataBinder.Eval(Container.DataItem, "process") %>'></asp:TextBox>

Best Regard

Pathan

---------------------------------------------------

Get Image insted of color

duo!@#28-Aug-07 15:58

duo!@#

28-Aug-07 15:58

In this code if a lot is occupied the label turns red and if not its green.
But instead of using color i would like to use images to represent this change.
Can any one Help?? Laugh | :laugh:

<br />
Dim sqlDataReader As Data.SqlClient.SqlDataReader= sqlLotStatus.EndExecuteReader() <br />
<br />
            Dim lotStatus As String<br />
            Dim textLabelName As String<br />
            Dim colourLabelName As String<br />
            Dim textLabelCtrl As Label<br />
            Dim colourLabelCtrl As Label<br />
<br />
            While sqlDataReader.Read()<br />
                ' Derive label names.<br />
                textLabelName = "Label" & sqlDataReader("Lot_id").ToString() & "Text"<br />
                colourLabelName = "Label" & sqlDataReader("Lot_id").ToString() &"Colour"<br />
<br />
                ' Get Label controls with derived names.<br />
                textLabelCtrl = CType(Me.FindControl(textLabelName), Label)<br />
                colourLabelCtrl = CType(Me.FindControl(colourLabelName), Label)<br />
<br />
                ' Set control properties for lot.<br />
                lotStatus = sqlDataReader("status").ToString()<br />
                If lotStatus = "occupied" Then<br />
                    textLabelCtrl.Text = sqlDataReader("Lot_id").ToString() & " is not available"<br />
                    colourLabelCtrl.BackColor = Drawing.Color.Red<br />
                Else<br />
                    textLabelCtrl.Text = sqlDataReader("Lot_id").ToString() & " is available"<br />
                    colourLabelCtrl.BackColor = Drawing.Color.Green<br />
                End If<br />
            End While<br />

Re: Get Image insted of color

Michael Sync28-Aug-07 19:01

Michael Sync

28-Aug-07 19:01

duo!@# wrote:
instead of using color i would like to use images to represent this change.

then, use the image control instead of Label.

OR.

You can set the style to that label.

Example :

Style ~

<style type="text/css">
      .TurnOn{
        background : transparent url(http://url.com/ig/images/myimage.png) no-repeat;
      }
    </style>

Code ~

If lotStatus = "occupied" Then
   Label2.CssClass = "TurnOn";
Else
   Label2.CssClass = "TurnOff";
End If

Hope it helps..

Re: Get Image insted of color

duo!@#28-Aug-07 19:51

duo!@#

28-Aug-07 19:51

Thank You For the code.

But is there a way were i could use images instead of labels
cos i intent to create a layout based view of a car park

transparent url(http://url.com/ig/images/myimage.png) Wht is this for?

XHTML Compliance of ContentPlaceHolder

Ed.Poore28-Aug-07 13:17

Ed.Poore

28-Aug-07 13:17

This has been really bugging me, what's the best way to tell the ContentPlaceHolder not to render a <span> tag? It seems quite a design flaw because if you include a block element such as <p>, <table> or <div> inside the content page then it will not be XHTML 1.1 Strict compliant D'Oh! | :doh:

. Anyway of changing the rendering to render nothing, or a <div> tag, short of writing my own ContentPlaceHolder of course.

Re: XHTML Compliance of ContentPlaceHolder

Michael Sync28-Aug-07 18:52

Michael Sync

28-Aug-07 18:52

Ed.Poore wrote:
if you include a block element such as
, or
inside the content page then it will not be XHTML 1.1 Strict compliant

You mean, p,table,div tag can't be put inside the ContentPanel?

It is very strange to me. I used to us those tags in ContentPanel all the time. I didn't have any problem with it...

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

If you want to thank me for my help, please vote my message by clicking one of numbers beside "Rate this message". Why vote? Plz Read it here. Thank you.

check if ie browser is running inside winform

algoaddict28-Aug-07 12:00

algoaddict

28-Aug-07 12:00

hi,

i want to build a winform that hosts an internet explorer browser window.
for the aspnet page that the browser navigates to, i want to detect if the browser is hosted in winform or not.

i thought to navigate the hosted ie to an address with a parameter like addres.com?ishosted=true
but the user can check whats the address and copy it to a regular browser window without the hosting winform and i dont want to allow this.

can anyone think of a better solution ?

thanx

Re: check if ie browser is running inside winform

Christian Graus28-Aug-07 12:05

Christian Graus

28-Aug-07 12:05

I don't know if there's any way you can tell, unless you can check the state of the window itself, if it's a child window. I very much doubt you can do that with javascript.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: check if ie browser is running inside winform

algoaddict28-Aug-07 12:24

algoaddict

28-Aug-07 12:24

ok, another question.

correct me if im wrong, but to my understanding, i can host any application that has an activex component (like word, excel, acrobat etc) inside a winform application.

how can i (if at all) create a general winform that can host every application type, even those that doesnt arrive with an activex component ?

thanx again,

Re: check if ie browser is running inside winform

Christian Graus28-Aug-07 15:16

Christian Graus

28-Aug-07 15:16

Yes, in theory.

You can't, at least not in a way that is reliable and OK for production code. You can try embedding any window as a child in your app, but anything could happen. If we didn't need ActiveX controls to do this, no-one would bother writing them.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Input CAPS letters in textbox

tjkota28-Aug-07 11:30

tjkota

28-Aug-07 11:30

Hi, I am trying to get user to input text in a form (textboxes) in all CAPS irrespective of CAPS lock turned on or off. I would really appreciate if someone can suggest how this can be done.

Thanks!

Re: Input CAPS letters in textbox

Fred_Smith28-Aug-07 11:35

Fred_Smith

28-Aug-07 11:35

You could force them to with some fancy Javascript, but why bother? (And anyway, they may turn Javascript off.) But there's nothing to stop you converting their input to uppercase when they post it back to the server if you want, with a simple ToUpper method....
Fred

Re: Input CAPS letters in textbox

tjkota28-Aug-07 11:38

tjkota

28-Aug-07 11:38

hi Fred, Thanks for your reply. I did convert the text to uppercase using ToUpper when submitting to the database and/or populating the form. But I still need a way to force user to enter all data in CAPS. Is Javascript the only way to accomplish this?
Teja

Re: Input CAPS letters in textbox

Fred_Smith28-Aug-07 11:50

Fred_Smith

28-Aug-07 11:50

tjkota wrote:
Is Javascript the only way to accomplish this?

Well, yes. You can't control the CAPS key on their keyboard, that's for sure.

But remember that a user can elect to disable all javascript in their browser, so you can never be 100% sure that this will always yeild the results you want, and will still have to cater for lower case input getting through to the server.

Still... most people do allow Javascript, so... you could use the keyup / keypress functions to test each character as they type it, but these functions are notriously tricky to get them to work consistently across all broswers on all platforms. A safer option wiuld be to test their input either in the onblur event of the textbox (ie when they leave it) or even on the form submit stage, returning false if it isn't "right".

Fred

Re: Input CAPS letters in textbox

Christian Graus28-Aug-07 13:34

Christian Graus

28-Aug-07 13:34

tjkota wrote:
Is Javascript the only way to accomplish this?

Of course - javascript is the only code that runs on the client end.

Christian Graus - Microsoft MVP - C++

"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

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