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Tag Prefix and Assembly error

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Join Date: Nov 2008

Posts: 99

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csharplearner csharplearner is offline

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Tag Prefix and Assembly error

Jan 4th, 2009

Hi all,

I am trying to create Web Controls and i am getting this error:

Could not load file or assembly 'Microsoft.Web.UI.WebControls' or one of its dependencies. The system cannot find the file specified.

i inserted all respective directives and namespaces at the begining of the page and also in the web.config file. But it still says it cannot find the file specified.

My code goes as following:

 Help with Code Tags 
 ASP.NET Syntax (Toggle Plain Text) 
 
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="toolbars.aspx.cs" Inherits="toolbars" %>
<%@ Import Namespace="Microsoft.Web.UI.WebControls" %>
<%@ Register TagPrefix="webControls" 
             Namespace="Microsoft.Web.UI.WebControls" 
             Assembly="Microsoft.Web.UI.WebControls" %>
 
 
<html >
<head runat="server">
    <title>Untitled Page</title>
    <script  language="c#" runat="server">
        public void buttonSelected(Object sender, EventArgs e)
        {
            string name;
            name = sender.ToString();
            Response.Write(name);
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>USING TOOLBAR ELEMENTS</h1>
    <webControls:Toolbar id="toolbar" runat="server" onButtonClick="buttonSelected" >
    <webControls:ToolbarButton id="home" Text="Home" />
    <webControls:ToolbarButton id="call" Text="Callus" />
    </webControls:Toolbar>
    </div>
    </form>
</body>
</html>
  
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="toolbars.aspx.cs" Inherits="toolbars" %>
<%@ Import Namespace="Microsoft.Web.UI.WebControls" %>
<%@ Register TagPrefix="webControls" 
             Namespace="Microsoft.Web.UI.WebControls" 
             Assembly="Microsoft.Web.UI.WebControls" %>

 
<html >
<head runat="server">
    <title>Untitled Page</title>
    <script  language="c#" runat="server">
        public void buttonSelected(Object sender, EventArgs e)
        {
            string name;
            name = sender.ToString();
            Response.Write(name);
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>USING TOOLBAR ELEMENTS</h1>
    <webControls:Toolbar id="toolbar" runat="server" onButtonClick="buttonSelected" >
    <webControls:ToolbarButton id="home" Text="Home" />
    <webControls:ToolbarButton id="call" Text="Callus" />
    </webControls:Toolbar>
    </div>
    </form>
</body>
</html>

i inserted the tagprefix in the page elements section of the web.config file too as following

 Help with Code Tags 
 ASP.NET Syntax (Toggle Plain Text) 
:
:
:
:
 
<pages enableViewStateMac="false" >
			<controls>
				<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
				<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add tagPrefix="webControls" namespace="Microsoft.Web.UI.WebControls" assembly="Microsoft.Web.UI.WebControls"   />
      </controls>
		</pages>
:
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:
:
:
:
:
:

<pages enableViewStateMac="false" >
			<controls>
				<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
				<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
        <add tagPrefix="webControls" namespace="Microsoft.Web.UI.WebControls" assembly="Microsoft.Web.UI.WebControls"   />
      </controls>
		</pages>
:
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Thanks in advance.

Last edited by csharplearner; Jan 4th, 2009 at 12:04 pm.

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Join Date: Jul 2008

Posts: 49

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iDeveloper iDeveloper is offline

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Re: Tag Prefix and Assembly error

Jan 5th, 2009

The problem is exactly what the error says. The compiler cannot find Microsoft.Web.UI.WebControls in your project. I'm assuming this is the library for IE controls because i don't recognize it as part of the standard libraries. Hence, you probably need to download it, locate it on your machine and reference it in your project.

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Join Date: Nov 2008

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Reputation: csharplearner is an unknown quantity at this point

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csharplearner csharplearner is offline

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Re: Tag Prefix and Assembly error

Jan 5th, 2009

•

Originally Posted by iDeveloper

The problem is exactly what the error says. The compiler cannot find Microsoft.Web.UI.WebControls in your project. I'm assuming this is the library for IE controls because i don't recognize it as part of the standard libraries. Hence, you probably need to download it, locate it on your machine and reference it in your project.

I downloaded trial version of Visual Studio 2008 Professional.. so doesnt it come with the package?
Can u please tell how to check if a particular library is present in the package or not?!