CODEWITHSUNDEEP
visual-studio-2005asp.net-core-mvc
Akbar Basha
Akbar Basha

Reputation: 1198

'TypeConverter' does not contain a definition for 'IsValid' in MVC6

i am using MVC 6 and i have referred the following name space,

using System;
using System.Collections.Generic;
using System.ComponentModel;
using Syncfusion.JavaScript.Shared.Serializer;
using System.Reflection;

here is my code,

static bool CanConvertTo<T>(string s)  {
   TypeConverter converter = TypeDescriptor.GetConverter(typeof(T));
   return converter.IsValid(s);
}

it throw the error like this,

'TypeConverter' does not contain a definition for 'IsValid' and no extension method 'IsValid' accepting a first argument of type 'TypeConverter' could be found (are you missing a using directive or an assembly reference?)

this was reproduced only in MVC6

how to resolve this and there is any alternate solution for this?

Project.JSON

Upvotes: 0

Views: 368

Answers (1)

hcp
hcp

Reputation: 3439

There is IsValid method in System, Version=4.0.0.0:

namespace System.ComponentModel
{
    public class TypeConverter
    {
        // other members

        public bool IsValid(object value)
        {
            // some implementation
        }
    }
}

There are two frameworks in your configuration: dnx451 and dnxcore50. I'm not sure the method IsValid exists in dnxcore50.

If you use only dnx451 framework, I recommend you try it:

1) Switch the project framework to dnx451 (or delete dnxcore50 section from project.json). If it's useless then:

2) Update the project to MVC 6 beta 7 and use next configuration in project.json:

"dependencies": {
    "EntityFramework.SqlServer": "7.0.0-beta7",
    "EntityFramework.Commands": "7.0.0-beta7",
    "Microsoft.AspNet.Mvc": "6.0.0-beta7",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta7",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.Facebook": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.Google": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.MicrosoftAccount": "1.0.0-beta7",
    "Microsoft.AspNet.Authentication.Twitter": "1.0.0-beta7",
    "Microsoft.AspNet.Diagnostics": "1.0.0-beta7",
    "Microsoft.AspNet.Diagnostics.Entity": "7.0.0-beta7",
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-beta7",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta7",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta7",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta7",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta7",
    "Microsoft.Framework.Configuration.Abstractions": "1.0.0-beta7",
    "Microsoft.Framework.Configuration.Json": "1.0.0-beta7",
    "Microsoft.Framework.Configuration.UserSecrets": "1.0.0-beta7",
    "Microsoft.Framework.Logging": "1.0.0-beta7",
    "Microsoft.Framework.Logging.Console": "1.0.0-beta7",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta7"
  },

  "frameworks": {
    "dnx451": { }
  }

I tried your example code in a project with this configuration and there are not any problems. My solution DNX SDK version is 1.0.0-beta7.

Upvotes: 0

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