How can I call a web service and pass parameters using the URL

问题

How can I call a ASP .NET web service and pass parameters using the URL?

For example, the URL for the service is like,

http://[localhost]:31856/MySystem/MyAPI.asmx?op=getHeight

I need to pass two parameters a and b, I tried

http://[localhost]:31856/MySystem/MyAPI.asmx?op=getHeight?a=254&b=1

But failed.

Please advice.

Many Thanks,

回答1:

If you need to pass more than one parameter, use this format param1=value1&param2=value2 and so on.So your link should be:

http://[localhost]:31856/MySystem/MyAPI.asmx/AnyMethodName?op=getHeight&a=254&b=1

You need a method like this.This method returns a list of strings,its just for demonstration.

    [WebMethod]
    public List<string> AnyMethodName(string op, string a, string b)
    {
       //Do whatever you want, get answer
        return (ans.ToList());
    }

回答2:

I had the same problem and I needed to add the following in my webconfig inside the system.web -tag:

<webServices>
<protocols>
<add name="HttpGet" />
</protocols>
</webServices>

The rest was pretty much like already mentioned (using the example from Ashwin's answer, just removed the op-parameter)

   [WebMethod]
    public List<string> AnyMethodName(string a, string b)
    {
       //Do whatever you want, get answer
        return (ans.ToList());
    }

After that I was able to call the webservice with the following (removed the op-parameter again):

http://localhost/MySystem/MyAPI.asmx/AnyMethodName?a=254&b=1

回答3:

Change the second ? to &. If you look at the page rendered by http://[localhost]:31856/MySystem/MyAPI.asmx, it will show you how to call it as an HTTP GET.

回答4:

It's not like that.
You have to declare the parameters in function. For example here is a little example:

[WebMethod]
public string[] getVariables(string sop, string sgsm)
{ // do what you want ... }

Then when you call it

WebReference.Service1 service = new WebReference.Service1();
service.getVariables("foo", "blabla");

回答5:

Follow Below Steps

Step 1: Click on Add Service Reference and add reference of service . It creates reference in a partial class to the service and all the methods which you need to call the service under the project namespace.

Step 2: Add the same class in using ..

Step 3: Browse the class file generated under the service reference and get the name of it .

Step 4: Create a client like new Service1SoapClient("Service1Soap"); and then use the service as Method . You can pass the parameter (if requires) like the way you pass while calling one method from another .

来源：https://stackoverflow.com/questions/11189451/how-can-i-call-a-web-service-and-pass-parameters-using-the-url

标签

ASP.NET

web-services

url