We help IT Professionals succeed at work.

Grid View Options

dpwdc
dpwdc asked
on
Medium Priority
378 Views
Last Modified: 2011-09-20
Hi,

I want a field a link if a value is blank, or the text if its not, but I'm not sure what they syntax is - below is besically what I want, but I need pointers in the right direction :)

Many thanks!



<asp:GridView ID="grdTable" runat="server" ShowHeader="False" DataSourceID="SqlData" DataKeyNames="IDField" AutoGenerateColumns="False">
<Columns>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<%
if Eval("text_field")="" then
%><asp:LinkButton CommandName="select" runat="server" Text="More Info" /><%
Else
  Eval("text_field")
End If
%>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
Comment
Watch Question

Commented:
Hi dpwdc,

  You have a couple solutions.  The simplest to implement but by no means the most elegant is to always have the item template field have both of your options and hide the according option based on Eval("text_field")="".

i'm fairly certain the code below should work out of the box.  If not you should be able to pick up how to apply the general concept. or just ask me another question and i'd be happy to help further.  This will also handle null reference errors on the string by applying the .ToString Operator.

<asp:GridView ID="grdTable" runat="server" ShowHeader="False" DataSourceID="SqlData" DataKeyNames="IDField" AutoGenerateColumns="False">
  <Columns>
    <asp:TemplateField ShowHeader="False">
      <ItemTemplate>
         <asp:LinkButton CommandName="select" runat="server" Text="More Info"  
                 visible='<%# Eval("text_field").ToString().Equals("") %>' /> <%# Eval("text_field").ToString() %>
      </ItemTemplate>
    </asp:TemplateField>
  </Columns>
</asp:GridView>


Good Luck,
Andrew

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts

Author

Commented:
Brilliant!

It was close enough for me to work out the rest - for anyone else that needs this, the solution was:

                <asp:TemplateField ShowHeader="False">
                    <ItemTemplate>
                    <asp:LinkButton ID="LinkButton1" CommandName="select" runat="server" Text="More Info"  
                        visible='<%# Eval("text_field").ToString().Equals("") %>' />
                        <asp:Label runat="server" ID="Label1" Text='<%# Eval("text_field").tostring() %>' Visible='<%# Eval("text_field").ToString().Equals("")=false  %>' />
                    </ItemTemplate>
                </asp:TemplateField>

Commented:
Good, I'm glad you got it to work.  If the text_field is truely "" when you want the button to show up you may not need the overhead of the label control since eval("text_field").tostring() won't output anything to the page, when the field is truely "" .  

Of course with the label you get the to easily apply css and styles or default skins to the text..

kbye,
andrew

Author

Commented:
Of course...  I had my self confinced I'd need to check that the value was not not not not = ""

I'll blame it on it being a friday
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.