'ListView' is ambiguous

wisemx · Jan 17, 2008

Note: We need a .NET 3.5 section.

Hannes Preishuber posted something interesting today worth noting on our local systems:

http://weblogs.asp.net/hpreishuber/archive/2008/01/17/listview-is-ambiguous-in-the-namespace-system-web-ui-webcontrols.aspx said...

'ListView' is ambiguous in the namespace 'System.Web.UI.WebControls'.

When you have Visual Studio 2008 and ASP.NET 3.5 Extensions installed you may run in following error.

BC30560: 'ListView' is ambiguous in the namespace 'System.Web.UI.WebControls'.

In my case, this happens when i drag an drop a Listview Control from toolbar. Then Visual Studio adds following line in web.config

<add assembly="System.Web.Extensions, Version=3.6.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/></assemblies>

Remove it - and it should work again.

In a second case, same action, added following in ASPX page

<%@ Register assembly="System.Web.Extensions, Version=3.6.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" namespace="System.Web.UI.WebControls" tagprefix="asp" %>

Remove it also

seems to be a bug from 3.5 extensions.
Click to expand...

mjp · Jan 17, 2008

wisemx said...
Note: We need a .NET 3.5 section.
Click to expand...

You're in it!

mjp
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wisemx · Jan 17, 2008

woot

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'ListView' is ambiguous

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