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我正在尝试将示例 v4 OData 服务http://services.odata.org/V4/OData/OData.svc/与新的 OData v7 一起使用。当我打电话ODataMessageReader.ReadMetadataDocument时，我遇到了一个UnexpectedXmlAttribute例外。是否可以忽略不支持的属性和元素？

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using Microsoft.OData;
using Microsoft.OData.Edm;

namespace ConsoleApplication19
{
    public class ODataResponseMessage : IODataResponseMessage
    {
        private readonly Dictionary<string, string> headers;
        private WebResponse _response;

        public ODataResponseMessage(WebResponse response)
        {
            this.headers = new Dictionary<string, string>();
            _response = response;
        }

        public IEnumerable<KeyValuePair<string, string>> Headers
        {
            get
            {
                return this._response.Headers.AllKeys.Select(headerName => new KeyValuePair<string,
                    string>(headerName, _response.Headers.Get(headerName)));
            }
        }
        public string GetHeader(string headerName)
        {
            if (headerName == null)
                throw new ArgumentNullException("headerName");

            return this._response.Headers.Get(headerName);
        }

        public int StatusCode { get; set; }

        public Uri Url { get; set; }

        public string Method { get; set; }

        public void SetHeader(string headerName, string headerValue)
        {
            headers[headerName] = headerValue;
        }

        public Stream GetStream()
        {
            return this._response.GetResponseStream();
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            HttpWebRequest request = WebRequest.CreateHttp("http://services.odata.org/V4/OData/OData.svc/$metadata");
            ODataResponseMessage metadataMessage = new ODataResponseMessage(request.GetResponse());

            ODataMessageReaderSettings readerSettings = new ODataMessageReaderSettings();
            readerSettings.MessageQuotas.MaxReceivedMessageSize = int.MaxValue;
            readerSettings.Validations = ValidationKinds.None;

            IEdmModel model;
            using (ODataMessageReader messageReader = new ODataMessageReader(metadataMessage, readerSettings))
            {
                model = messageReader.ReadMetadataDocument();
            }
        }
    }
}

我得到的例外是：

Microsoft.OData.ODataException 未处理 HResult=-2146233079
Message=无法从消息内容中读取元数据文档。UnexpectedXmlAttribute ：在给定的上下文中不需要属性“ConcurrencyMode”。: (1, 2043)

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0 回答 0