c#System.guid不包含Parse的定义

Question

AT.Anchor = System.Guid.Parse(DataBinder.Eval(e.Item.DataItem, "Anchor").ToString());

抛出:

'System.Guid' does not contain a definition for 'Parse'

当我尝试构建它时.但它运行良好,任何想法我怎么能更好地处理这个？

编辑

这是我的web.config的一部分

    <compilation defaultLanguage="c#" debug="true">
        <assemblies>
            <add assembly="System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add assembly="System.Data.DataSetExtensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Xml.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>
            <add assembly="System.Data.Linq, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>
            <add assembly="System.ServiceModel.Web, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
            <add assembly="System.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
            <add assembly="System.Web.ApplicationServices, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add assembly="MySql.Data, Version=6.3.6.0, Culture=neutral, PublicKeyToken=C5687FC88969C44D"/>
            <add assembly="MySql.Data.Entity, Version=6.3.6.0, Culture=neutral, PublicKeyToken=C5687FC88969C44D"/>
            <add assembly="MySql.Web, Version=6.3.6.0, Culture=neutral, PublicKeyToken=C5687FC88969C44D"/></assemblies>
    </compilation>

Answer 1

Guid.TryParse 是.NET 4的一部分.确保你是在构建和运行.NET 4,它应该没问题.