How to resolve this object reference error in web.config

Question

I am receiving the following error in my web.config.

Parser Error Message: Object reference not set to an instance of an object.
Source File: D:\Webs\behi100001\web.config    Line: 82 

The specific error line is "type="Microsoft.Samples.SqlTableProfileProvider"

<providers>
            <clear/>
            <add name="TableProfileProvider"
              type="Microsoft.Samples.SqlTableProfileProvider"
                connectionStringName="conBTWSqlExpress"
                table="Profile_Custom"
                applicationName="Harbor"/>
        </providers>

I have a file in my App_Code directory with the namespace Microsoft.Samples, with a class called SqlTableProfileProvider. I am not sure what I am doing wrong.

Any help?

Thanks, Kevin

Answer 1

You might have to change

type="Microsoft.Samples.SqlTableProfileProvider" to  type="Microsoft.Samples.SqlTableProfileProvider, Microsoft"

I think you have to include the assembly name, not just the namespace.

Answer 2

Change your type to:

type="Microsoft.Samples.SqlTableProfileProvider, <your assembly's name>"

where is... well your assembly's name. I think because the the sample class is in your App_code, it is compiled into your assembly.

Answer 3

我的直觉是您的连接字符串错误，或者您的应用程序无权访问数据库。