How to declare if condition in source page

Question

2.00/5 (3 votes)

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Here is my code:

XML

<% if (Eval(art_avatar_url) != "")
            {%>
                <img alt="<%#Eval("name")%>" title="<%#Eval("name")%>" src='../img/avatars/<%#Eval("img_url")%>' style="width: 80px; height: 80px">
            <%}
              else
              {%>
                <img alt="<%#Eval("name")%>" title="<%#Eval("name")%>" src="../img/blank.gif" style="width: 80px; height: 80px">
            <%}%>

in this code the error in if condition. I know this is not a correct format to declare if condition in Eval function.
Please help me how to declare this.

Thanks in advance

How to do this in code behind?

please help me how to declare code behind and how to call in source page

See the code where i get wrong:

XML

<img alt="<%#Eval("name")%>" title="<%#Eval("name")%>"
                        src='<%#Eval("avatar_url") != "" ? "../img/avatars/"+ Eval("avatar_url") : "../img/blank.gif"%>'
                            style="width: 80px; height: 80px">

Posted 13-Jun-11 22:01pm

rahul dev123

Updated 14-Jun-11 2:32am

v4

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4 solutions

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Christian Graus · Answer 1 · 2011-06-13T22:06:00

Solution 1

This is ugly has hell. You should do this in your code behind, so your code is readable. Just set up a literal and set it's properties, or even an asp:Image.

Posted 13-Jun-11 22:06pm

Christian Graus

nit_singh · Answer 2 · 2011-06-14T00:07:00

Solution 3

Try that way, it will work

<img alt="<%#Eval("name")%>" title="<%#Eval("name")%>"
                        src='<%#Eval("art_avatar_url") != "" ? "images/"+ Eval("img_url") : "images/blank.gif"%>'
                            style="width: 80px; height: 80px">

Posted 14-Jun-11 0:07am

nit_singh

Comments

rahul dev123 14-Jun-11 8:13am

No its not working. If i used this then the source is src="images/"

nit_singh 14-Jun-11 10:06am

see "img_url" column, it might be coming blank. because the same is working here

nit_singh 15-Jun-11 4:08am

may I know the reason for downvoting it

Shahriar Iqbal Chowdhury/Galib · Answer 3 · 2011-06-14T03:06:00

Solution 4

hi,
Try this code below

XML

<img alt='<%#Eval("name")%>' title='<%#Eval("name")%>'
src='<%# string.IsNullOrEmpty(Eval("art_avatar_url").ToString())?"images/blank.gif":"images/"+ Eval("img_url").ToString() %>'
style="width: 80px; height: 80px">

Hope this will address your issue.

Posted 14-Jun-11 3:06am

Shahriar Iqbal Chowdhury/Galib

JustWorking · Answer 4 · 2011-06-13T22:07:00

Solution 2

XML

<% if(Eval("img_url") != ""){%>
  some html goes here
<%} else {%>
  some different html goes here
<%}%>

C#

public string GetAppropriateHTML()
{
    string html = "";
    if (Eval("img_url") != "")
    {
        html = "some html goes here";
    }
    else
    {
        html = "some other html goes here"
    }
    return html;
}

Posted 13-Jun-11 22:07pm

JustWorking

Comments

rahul dev123 14-Jun-11 5:33am

If i used this code then Error shown like this:
Databinding methods such as Eval(), XPath(), and Bind() can only be used in the context of a databound control.