XMLSerializer未反序列化XML

Question

我在尝试反序列化xml时收到以下错误。这会产生错误：

XmlSerializer serializer=新XmlSerializer（typeof（PrivateOptionsAPIResponse））
var result=序列化程序。反序列化（streamReader）；

例外情况：

系统捕获到InvalidOperationException消息=XML文档（0，0）中有错误
InnerException：系统。Xml。XmlException消息=缺少根元素
源=系统。Xml

我不知道如何纠正这个问题。Request返回以下XML：

<代码>

我使用了xsd。exe生成一个类。PrivateOptionsAPIResponse（由xsd.exe工具生成）上的定义显示：

公共部分类PrivateOptionsAPIResponse{

private object itemField;

/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("CountiesForPostalCodeResponse", typeof(ZipCodeValidationResponse))]
[System.Xml.Serialization.XmlElementAttribute("PlanDetailsForIndividualOrFamilyResponse", typeof(IndividualPlanBenefitResponse))]
[System.Xml.Serialization.XmlElementAttribute("PlansForIndividualOrFamilyResponse", typeof(IndividualPlanQuoteResponse))]
[System.Xml.Serialization.XmlElementAttribute("ProductDetailsForSmallGroupResponse", typeof(SmallGroupProductBenefitResponse))]
[System.Xml.Serialization.XmlElementAttribute("ProductsForSmallGroupResponse", typeof(SmallGroupProductQuoteResponse))]
public object Item {
    get {
        return this.itemField;
    }
    set {
        this.itemField = value;
    }
}

}

如果我然后浏览到ZipCodeValidationACK定义，它会显示如下：

public partial class ZipCodeValidationResponse {

private CountyType[] countiesField;

/// <remarks/>
[System.Xml.Serialization.XmlArrayItemAttribute("County", IsNullable=false)]
public CountyType[] Counties {
    get {
        return this.countiesField;
    }
    set {
        this.countiesField = value;
    }
}

}

如果我浏览CountyType上的定义，我会看到：

public partial class CountyType {

private string countyNameField;

private StateAbbreviationType stateCodeField;

/// <remarks/>
public string CountyName {
    get {
        return this.countyNameField;
    }
    set {
        this.countyNameField = value;
    }
}

/// <remarks/>
public StateAbbreviationType StateCode {
    get {
        return this.stateCodeField;
    }
    set {
        this.stateCodeField = value;
    }
}

}

----------工作解决方案----------------:

using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
        {
            string status = ((HttpWebResponse)response).StatusDescription;

            if(status == "OK")
            {
                using (Stream responseStream = response.GetResponseStream())
                {
                    using (StreamReader reader = new StreamReader(responseStream))
                    {
                        var xmlSerializer = new XmlSerializer(typeof(PrivateOptionsAPIResponse));
                        var privateOptionsAPIResponse = xmlSerializer.Deserialize(reader) as PrivateOptionsAPIResponse;
                    }
                }                    
            }
        }

Answer 1

首先，检查XML的格式是否有效。从给定的异常来看，似乎您提供的xml文档无效。如果您可以发布您试图反序列化的内容（xml），将不胜感激。

Answer 2

您如何声明您的stream Reader？查看它的内容，您很可能会发现它是空的或不包含完整的XML文档。