C# [ModelName]标记 模型，类名称重复。

前几天遇到一个不算bug的bug  记录分享一下

 出错情况

webapi  程序会自带一个模板  如图

点某一个接口进去后

    出错原因

     model实体中出现了名称一样的（并不会影响程序运行和接口的访问只针对上面类似情况）

       解决方法

     1.[ModelName]标记

2. 让他获取完整的命名空间

这边只说第二种解决方式  简单简洁统一

在ModelNameHelper中，用此替换类的内容。

在HelpPageSampleGenerator中，将WriteSampleObjectUsingFormatter方法替换为此方法

namespace HelpPageErrorSimulator.Areas.HelpPage.ModelDescriptions
{
    internal static class ModelNameHelper
    {
        // Modify this to provide custom model name mapping.
        public static string GetModelName(Type type)
        {
            ModelNameAttribute modelNameAttribute = type.GetCustomAttribute<ModelNameAttribute>();
            if (modelNameAttribute != null && !String.IsNullOrEmpty(modelNameAttribute.Name))
            {
                return modelNameAttribute.Name;
            }  

            string modelName = type.FullName;
            if (type.IsGenericType)
            {
                // Format the generic type name to something like: GenericOfAgurment1AndArgument2
                Type genericType = type.GetGenericTypeDefinition();
                Type[] genericArguments = type.GetGenericArguments();
                string genericTypeName = genericType.FullName;  

                // Trim the generic parameter counts from the name
                genericTypeName = genericTypeName.Substring(, genericTypeName.IndexOf('`'));
                string[] argumentTypeNames = genericArguments.Select(t => GetModelName(t)).ToArray();
                modelName = String.Format(CultureInfo.InvariantCulture, "{0}Of{1}", genericTypeName, String.Join("And", argumentTypeNames));
            }  

            return modelName;
        }
    }
}  

[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "The exception is recorded as InvalidSample.")]
public virtual object WriteSampleObjectUsingFormatter(MediaTypeFormatter formatter, object value, Type type, MediaTypeHeaderValue mediaType)
{
    if (formatter == null)
    {
        throw new ArgumentNullException("formatter");
    }
    if (mediaType == null)
    {
        throw new ArgumentNullException("mediaType");
    }  

    object sample = String.Empty;
    MemoryStream ms = null;
    HttpContent content = null;
    try
    {
        if (formatter.CanWriteType(type))
        {
            ms = new MemoryStream();
            content = new ObjectContent(type, value, formatter, mediaType);
            formatter.WriteToStreamAsync(type, value, ms, content, null).Wait();
            ms.Position = ;
            StreamReader reader = new StreamReader(ms);
            string serializedSampleString = reader.ReadToEnd();
            if (mediaType.MediaType.ToUpperInvariant().Contains("XML"))
            {
                serializedSampleString = TryFormatXml(serializedSampleString);
            }
            else if (mediaType.MediaType.ToUpperInvariant().Contains("JSON"))
            {
                serializedSampleString = TryFormatJson(serializedSampleString);
            }  

            sample = new TextSample(serializedSampleString);
        }
        else
        {
            sample = new InvalidSample(String.Format(
                CultureInfo.CurrentCulture,
                "Failed to generate the sample for media type '{0}'. Cannot use formatter '{1}' to write type '{2}'.",
                mediaType,
                formatter.GetType().FullName,
                type.FullName));
        }
    }
    catch (Exception e)
    {
        sample = new InvalidSample(String.Format(
            CultureInfo.CurrentCulture,
            "An exception has occurred while using the formatter '{0}' to generate sample for media type '{1}'. Exception message: {2}",
            formatter.GetType().FullName,
            mediaType.MediaType,
            UnwrapException(e).Message));
    }
    finally
    {
        if (ms != null)
        {
            ms.Dispose();
        }
        if (content != null)
        {
            content.Dispose();
        }
    }  

    return sample;
}  

如您所见，通过genericType.FullName改变了type.FullName和genericType.Name的type.Name（最后一个不是必需的）。

这样，系统将获得全名，而不是获取类的名称，包括命名空间。

现在，帮助系统甚至可以在各种命名空间中使用具有相同名称的类。

原文链接：https://www.c-sharpcorner.com/UploadFile/d132a2/workaround-in-Asp-Net-webapi-help-page/