Re: preview a picture from my hard disk before upload it - ASP.NET Discussion Boards

As you didn't use the "Ignore HTML" option when you posted the code, he can't use it. There are several parts of the code that doesn't show up in the message.

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single minded; short sighted; long gone;

Re: preview a picture from my hard disk before upload it

ayeleteric30-Jul-07 1:16

ayeleteric

30-Jul-07 1:16

Thank you Guffa,

Here is my code:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>

<script type="text/javascript">
// width to resize large images to
var maxWidth=100;
// height to resize large images to
var maxHeight=100;
// valid file types
var fileTypes=["bmp","gif","png","jpg","jpeg"];
// the id of the preview image tag
var outImage="previewField";
// what to display when the image is not valid
var defaultPic="box_icons.jpg";

/***** DO NOT EDIT BELOW *****/

function preview(what)
{
var source=what.value;
var ext=source.substring(source.lastIndexOf(".")+1,source.length).toLowerCase();
for (var i=0; i<fileTypes.length; i++) if (fileTypes[i]==ext) break;

globalPic=new Image();

if (i<fileTypes.length)
globalPic.src=source;
else
{
globalPic.src=defaultPic;
alert("THAT IS NOT A VALID IMAGE\nPlease load an image with an extention of one of the following:\n\n"+fileTypes.join(", "));
}
setTimeout("applyChanges()",200);
}
var globalPic;

function applyChanges()
{
var field=document.getElementById(outImage);
var x=parseInt(globalPic.width);
var y=parseInt(globalPic.height);
if (x>maxWidth)
{
y*=maxWidth/x;
x=maxWidth;
}

if (y>maxHeight)
{
x*=maxHeight/y;
y=maxHeight;
}

field.style.display=(x<1 || y<1)?"none":"";
field.src=globalPic.src;
field.width=x;
field.height=y;
}
// End -->
</script>
</head>

<body>
<div style="line-height: 1.9em; text-align:center">
Test it by locating a valid file on your hard drive:
<br/>
<input type="file" id="picField" onchange="preview(this)"/>
<br/>
<img alt="Graphic will preview here" id="previewField" style="width: 288px; height: 272px;"/> <br/>
</div>
</body>

</html>

Eric H.

Re: preview a picture from my hard disk before upload it

ayeleteric30-Jul-07 2:59

ayeleteric

30-Jul-07 2:59

As I wrote upstair, I simplify the problem to a short code. Can you try to help me on this code. I think it will help me to the big one too.

The problem is that I do not see the picture.

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<script language="javascript" type="text/javascript">
// <!CDATA[

function Button1_onclick() {
document.getElementById("img1").src="C:\Documents and Settings\All Users\Documents\My Pictures\Sample Pictures\Water lilies.jpg"
}

// ]]>
</script>
</head>
<body>
<form id="form1" runat="server">

<img src="" style="width: 96px; height: 96px" id="img1" />

<input id="Button1" type="button" value="button" önclick="return Button1_onclick()" />

</form>
</body>
</html>

Thank you,

Eric H.

AutocompleteText of TextBox

Imran Khan Pathan29-Jul-07 22:46

Imran Khan Pathan

29-Jul-07 22:46

Hi friends.

I have One table in which i have one field of projectTitle.
I want to bind this projecttitle to autocomplete text of textbox.
When I start to wrting in textbox, all project title will be appear in autocomplete text.

How can I performe this task?

Plz give me right solution

Thanks In adavance

Pathan

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

Re: AutocompleteText of TextBox

enjoycrack29-Jul-07 23:58

enjoycrack

29-Jul-07 23:58

Hi Pathan,

You can use AJAX to archive this...

<< >>

8x Solutions Ltd

how to assign QueryString value to a variable

hurrem29-Jul-07 22:39

hurrem

29-Jul-07 22:39

Hi I have a question:
how to assign QueryString value to a variable, that should return unique ID of a user from ASPDBNET table.
I used wrote this way:
string id=Request.QueryString["UserID"];

but it doesn't assigns any value... Frown | :(

Thank u

Re: how to assign QueryString value to a variable

Imran Khan Pathan29-Jul-07 22:57

Imran Khan Pathan

29-Jul-07 22:57

string id=Request.QueryString["UserID"].ToString();

Best Regard

Pathan

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

Re: how to assign QueryString value to a variable

hurrem29-Jul-07 23:09

hurrem

29-Jul-07 23:09

I'm sorry, but now it gives me this kind of exception:

System.NullReferenceException was unhandled by user code
Message="Object reference not set to an instance of an object."
Source="App_Web_p-lbdwwh"

Thank you

Re: how to assign QueryString value to a variable

Imran Khan Pathan30-Jul-07 3:15

Imran Khan Pathan

30-Jul-07 3:15