Webservice方法返回XmlDocument，参考中看到一个XmlNode [英] Webservice method return XmlDocument, Reference sees a XmlNode

问题描述

我遇到了一个我无法解决的问题，这就是为什么我求你帮助我！我正在使用WebService，并且试图从WebService方法(称为GetSystemDocument)返回XmlDocument，该方法如下:

I've faced a problem I can't solve that's why I beg you to help me! I'm working with a WebService and I'm trying to return a XmlDocument from a WebService method called GetSystemDocument which looks like :

[WebMethod(Description = "blabla")]
    public XmlDocument GetSystemDocument(string DocumentName)
    {
        return new XmlDocument();
    }

在我引用此Web服务的项目中.Visual Studio告诉我不能将类型'System.Xml.XmlNode'隐式转换为'System.Xml.XmlDocument'.

In the project where I reference this web service. Visual Studio tells me it cannot implicitily convert type 'System.Xml.XmlNode' to 'System.Xml.XmlDocument'.

如果我查看由Visual Studio生成的Reference.cs文件，则代码如下:

If I look into the Reference.cs file(generated by Visual Studio) the code looks like :

/// <remarks/>
    [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://doc.cexp.ca/GetSystemDocument", RequestNamespace="http://doc.cexp.ca", ResponseNamespace="http://doc.cexp.ca", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
    public System.Xml.XmlNode GetSystemDocument(string DocumentName) {
        object[] results = this.Invoke("GetSystemDocument", new object[] {
                    DocumentName});
        return ((System.Xml.XmlNode)(results[0]));
    }

问题就在那里.代替XmlNode，我们应该看到XmlDocument，如果我手动对其进行编辑，它将生成并且一切正常.

The problem is there. Instead of XmlNode we should see XmlDocument, If I edit it manually, It builds and everything works fine.

我尝试重置IIS，更新引用，重建Web服务.有人有解决办法吗?

I've tried resetting IIS, update the reference, rebuild the web service. Someone has a solution?

这是一个相似的问题，尚未得到解答

Here is a Similar question which is unanswered.

非常感谢

推荐答案

Web方法的结果包含在作为XML文档的SOAP文档中.因此，如果要从Web方法返回XML，则应返回XmlElement.

The result of a web method is included in the SOAP document which is a XML Document. So if you want to return XML from a web method you should return an XmlElement.

[WebMethod(Descrption = "foo")]
public XmlElement GetSystemDocument(string documentName)
{
   var doc = new XmlDocument();
   doc.LoadXml("<foo> <bar x="a"/> </foo>");
   return doc.DocumentElement;
}

更正了代码以确保它可以编译

Corrected the code to make sure that it compiles

这篇关于Webservice方法返回XmlDocument，参考中看到一个XmlNode的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！