如何使用重载方法访问Web服务 [英] How to access a web service with overloaded methods

问题描述

我正在尝试在Web服务中使用重载方法，但是在Visual Studio 2005中尝试添加Web引用"时出现了System.InvalidOperationException异常(这是相关的代码段):

I'm trying to have overloaded methods in a web service but I am getting a System.InvalidOperationException when attempting "Add Web Reference" in Visual Studio 2005 (here's the relevant snippets of code):

public class FileService : System.Web.Services.WebService
{
    private static readonly MetaData[] EmptyMetaData = new MetaData[0];
    public FileService()
    {
    // a few innocent lines of constructor code here...
    }
    [WebMethod(MessageName = "UploadFileBasic", 
        Description = "Upload a file with no metadata properties")]
    public string UploadFile(string trimURL
        , byte[] incomingArray
        , string fileName
        , string TrimRecordTypeName)
    {
        return UploadFile(trimURL
                , incomingArray
                , fileName
                , TrimRecordTypeName
                , EmptyMetaData);
    }
    [WebMethod(MessageName = "UploadFile",
        Description = "Upload a file with an array of metadata properties (Name/Value pairs)")]
    public string UploadFile( string trimURL
        , byte[] incomingArray
        , string FileName
        , string TrimRecordTypeName
        , MetaData[] metaDataArray)
    {
    // body of UploadFile function here 

我认为在WebMethod属性上提供其他MessageName属性可以解决此问题，但这是我得到的全部错误消息:

I thought supplying a different MessageName property on the WebMethod attribute would fix this problem but here is the entire error message I get:

System.String UploadFileBasic(System.String，Byte []，System.String，System.String)和System.String UploadFile(System.String，Byte []，System.String，System.String)都使用该消息名称为"UploadFileBasic".使用WebMethod定制属性的MessageName属性可以为方法指定唯一的消息名称.

Both System.String UploadFileBasic(System.String, Byte[], System.String, System.String) and System.String UploadFile(System.String, Byte[], System.String, System.String) use the message name 'UploadFileBasic'. Use the MessageName property of the WebMethod custom attribute to specify unique message names for the methods.

Web服务编译正常；我看不到这里有什么问题.

The web service compiles OK; I cannot see what is wrong here.

推荐答案

我的建议是不要使用重载的方法名称. WSDL中没有这样的概念，那为什么要麻烦呢?

My suggestion is to not use overloaded method names. There is no such concept in WSDL, so why bother?

这篇关于如何使用重载方法访问Web服务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！