Solved

Unrecognized tag prefix of device filter 'asp'

Posted on 2013-05-28
4
4,282 Views
Last Modified: 2013-05-29
Why do these warnings appear? Unrecognized tag prefix of device filter 'asp'

<asp:GridView id="grdWatchList" runat="server"  

    Height="20px"
            Width="600px" Caption="Best Picks List "  
            BorderColor="Black" BorderStyle="Double" BorderWidth="1px"
            BackColor="Azure" AlternatingRowStyle-BackColor="#FFFF66"
            AlternatingRowStyle-BorderStyle="Solid" Font-Names="Arial"
            Font-Size="10pt" AutoGenerateColumns="False"
            DataKeyNames="SymbolID" PageSize="3"
            CaptionAlign="Left" ForeColor="Black"
            >
         
            <Columns> Validation(HTML5): element 'columns' is not supported.

Is documentation available?

Thanks,
0
Comment
Question by:Dovberman
  • 3
4 Comments
 
LVL 35

Accepted Solution

by:
Miguel Oz earned 300 total points
Comment Utility
Check your web.config as per suggestions below:
http://stackoverflow.com/questions/12809653/unrecognized-tag-prefix-or-device-filter-asp-in-vs2012
What kind of project is it? New? web app or site?
0
 

Author Comment

by:Dovberman
Comment Utility
This is a new web site project.
0
 

Author Comment

by:Dovberman
Comment Utility
Updating the Controls section of web.config to 4.0 resolved the issue.

Thanks
0
 

Author Closing Comment

by:Dovberman
Comment Utility
Thank you.
0

Featured Post

Why You Should Analyze Threat Actor TTPs

After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

Join & Write a Comment

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
For most people, the WrapPanel seems like a magic when they switch from WinForms to WPF. Most of us will think that the code that is used to write a control like that would be difficult. However, most of the work is done by the WPF engine, and the W…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Polish reports in Access so they look terrific. Take yourself to another level. Equations, Back Color, Alternate Back Color. Write easy VBA Code. Tighten space to use less pages. Launch report from a menu, considering criteria only when it is filled…

744 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

15 Experts available now in Live!

Get 1:1 Help Now