Server tags cannot contain <% ... %> constructs

[Marcos MOS]

Hi,

I've put a appSetting tag into my web.config, but when I try to catch its
value to my Image WebControl occurs the follow error: "Server tags cannot
contain <% ... %> constructs."

on myPage.aspx (Notice the ImageUrl tag):
<asp:Image id="Image1" runat="server"
ImageUrl=<%=System.Configuration.ConfigurationSettings.AppSettings["SrcImgSi
stema"]%> />

So, What's wrong with my ImageUrl attribution?
Is there any way to do that?

thanks a lot
Marcos

 

[Marcos MOS]

Thanks... but, I'd like to do it inside my .aspx file...

Isn't it possible?

tanks
Marcos

you can set this property programmatically within a server script block:
Image1.ImageUrl =
System.Configuration.ConfigurationSettings.AppSettings.....
you cannot use <%%> inside a web control as web controls already run at the
server.
sharon.

Hi,

I've put a appSetting tag into my web.config, but when I try to catch its
value to my Image WebControl occurs the follow error: "Server tags cannot
contain <% ... %> constructs."

on myPage.aspx (Notice the ImageUrl tag):
<asp:Image id="Image1" runat="server"

ImageUrl=<%=System.Configuration.ConfigurationSettings.AppSettings["SrcImgSi

stema"]%> />

So, What's wrong with my ImageUrl attribution?
Is there any way to do that?

thanks a lot
Marcos

 

[Sharon]

you can set this property programmatically within a server script block:
Image1.ImageUrl =
System.Configuration.ConfigurationSettings.AppSettings.....
you cannot use <%%> inside a web control as web controls already run at the
server.
sharon.

 

[Sharon]

i don't know of any way, and there is no reason to do it inside the html
section.
one of the ideas behind web controls design, is the separation of code from
html.

Thanks... but, I'd like to do it inside my .aspx file...

Isn't it possible?

tanks
Marcos

you can set this property programmatically within a server script block:
Image1.ImageUrl =
System.Configuration.ConfigurationSettings.AppSettings.....
you cannot use <%%> inside a web control as web controls already run at the
server.
sharon.

ImageUrl=<%=System.Configuration.ConfigurationSettings.AppSettings["SrcImgSi

stema"]%> />

So, What's wrong with my ImageUrl attribution?
Is there any way to do that?

thanks a lot
Marcos

 

[bruce barker]

use the binding syntax <%# bindingexpression %>

-- bruce (sqlwork.com)

 

[Bruno Sirianni]

In your code there are some errors :

The <%= construct can only be used in client script for write some value
from server (like old ASP).
your Image is server side not in client side!!!!

You can use the <%# construct. This is for binding value!
<asp:Image id="Image1" runat="server"
ImageUrl='<%#System.Configuration.ConfigurationSettings.AppSettings["SrcImgS
istema"]%>' />

this code require a DataBind() method call!!!

Brun