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Set an image source dynamically from a variable or QueryString 1

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Quickfix99

Quickfix99

Technical User
May 16, 2007
27
CA
Hi,

I have a simple request. How do I set the source of an image in an ASP page using a variable? Example:

<script runat="server">
protected void Page_Load(Object Source, EventArgs E)
{
String Image = "}
</script>

<asp:Image ID="Image1" runat="server" ImageUrl = (Image Variable) />

Any reply would be greatly appreciated!

QF
 
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I tried that but it appears I am using the code in the wrong area or something?

CS0103: The name 'IMAGE1' does not exist in the current context

 
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Show the code that causes that error.. and the HTML of the page as well.
 
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<script runat="server">
protected void Page_Load(Object Source, EventArgs E)
{
String IMAGE = Request.QueryString["IMAGE"];
Response.Write(Request.QueryString["IMAGE"]);
Image1.ImageSrc = IMAGE;
}
</script>
</head>
<body>

<div style="width: 640px; height:480 px;">
<img id = "Image1" runat ="server" />
</div>

</body>
</html>
 
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I don't see a <form> tag in your HTML.. I belive that is the reason why the control is no being recognized.
 
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Oops, I missed it in my copy and paste operation...The form tag is there.

thx


<script runat="server">
protected void Page_Load(Object Source, EventArgs E)
{
String IMAGE = Request.QueryString["IMAGE"];
Response.Write(Request.QueryString["IMAGE"]);
Image1.ImageSrc = IMAGE;
}
</script>
</head>
<body>
<script runat="server">
protected void Page_Load(Object Source, EventArgs E)
{
String IMAGE = Request.QueryString["IMAGE"];
Response.Write(Request.QueryString["IMAGE"]);
Image1.ImageSrc = IMAGE;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div style="width: 640px; height:480 px;">
<img id = "Image1" runat ="server" />
</div>

</form>
</body>
</html>
<div style="width: 640px; height:480 px;">
<img id = "Image1" runat ="server" />
</div>

</body>
</html>
 
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Code: 
<img id = "Image1" runat ="server" />
Shouldn't this be:
Code: 
<asp:image runat="server" id="Image1" />

I'm using the code behind approach right now and it works perfectly!
Brett
 
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I still get an error though:

Compiler Error Message: CS0117: 'System.Web.UI.WebControls.Image' does not contain a definition for 'ImageURL'

Source Error:

Line 16: Image1.ImageURL = IMAGE;
Line 17:
Line 18:

 
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Yes, VS 2005. I have moved the Page Load code to the code behind class. I no longer get the no definition error. In fact I don't get any errors other than the image not displaying. Does the ImageURL string have to be in any special format?

Thanks
 
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OK, I figured it out....I needed to remove the Page_Load method from my asp page (even though there was no code in there).

Thanks very much for your help. I learn a lot this way!

Mark
 
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No problem, just remember not to use inline coding as you were.. Keep all coding in your code behind file or class files.
 
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