C# 如何使用重载方法访问 Web 服务
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How to access a web service with overloaded methods
提问by John Adams
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):
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 System.InvalidOperationException（这是相关的代码片段）：
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
I thought supplying a different MessageName property on the WebMethod attribute would fix this problem but here is the entire error message I get:
我认为在 WebMethod 属性上提供不同的 MessageName 属性可以解决这个问题，但这里是我得到的整个错误消息：
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.
System.String UploadFileBasic(System.String, Byte[], System.String, System.String) 和 System.String UploadFile(System.String, Byte[], System.String, System.String) 都使用消息名称“UploadFileBasic” '。使用 WebMethod 自定义特性的 MessageName 属性为方法指定唯一的消息名称。
The web service compiles OK; I cannot see what is wrong here.
web服务编译OK；我看不出这里有什么问题。
采纳答案by John Saunders
My suggestion is to not use overloaded method names. There is no such concept in WSDL, so why bother?
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，何必呢？
回答by Keith
I would generally have a class object behind the web service interface that has the overloaded methods and then create individual methods in your asmx.cs file with different names. I know you can use the attributes but it just makes tidier code IMHO.
我通常会在具有重载方法的 Web 服务接口后面有一个类对象，然后在您的 asmx.cs 文件中创建具有不同名称的各个方法。我知道您可以使用这些属性，但恕我直言，它只会使代码更整洁。
回答by Vincenzo Ferraioli
You need to change this part:
您需要更改此部分：
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
to this one:
对这个：
[WebServiceBinding(ConformsTo = WsiProfiles.None)]
回答by Afnan Ahmad
Operation overloading is not allowed for web services. But you can also follow the below steps.
Web 服务不允许操作过载。但您也可以按照以下步骤操作。
Firstly you need to change
首先你需要改变
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
To
到
[WebServiceBinding(ConformsTo = WsiProfiles.None)]
Secondly MessageName property of WebMethod should be different for Overloaded method.
其次，对于 Overloaded 方法，WebMethod 的 MessageName 属性应该不同。
namespace foo
{
/// <summary>
/// Summary description for TestService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.None)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class TestService : System.Web.Services.WebService
{
[WebMethod(MessageName = "HelloWorld1")]
public string HelloWorld()
{
return "Hello World";
}
[WebMethod(MessageName = "HelloWorld2")]
public string HelloWorld(string Value = "default")
{
return "Hello World";
}
}
}
But if you will call URL Like:
但是如果你调用 URL Like：
http://localhost:15558/TestService.asmx/HelloWorld2?Value=2
It will work.
它会起作用。
But if you will call URL Like:
但是如果你调用 URL Like：
http://localhost:15558/TestService.asmx/HelloWorld?Value=2
It will display HTTP 500
它会显示 HTTP 500
