Web Service Soap extension , how set attribute

[klerik123456]

I try set soap extension attributes on client side. For example:

Implementation in web service:

[AttributeUsage(AttributeTargets.Method)]
public class EncryptMessageAttribute : SoapExtensionAttribute
{
private string strKey="null";
 
public string StrKey
{
get {  return strKey; }
 
set { strKey = value; }    
}
}
 

Soap extension class:

public class EncryptMessage : SoapExtension
{
...
}
 

Used on web method:

[WebMethod]
[EncryptMessage( StrKey = "pass")]
public string test2()
{
return "ok";
}

Implementation in Proxy class:

[System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/test", RequestNamespace="http://tempuri.org/", ResponseNamespace="http://tempuri.org/", Use=System.Web.Services.Description.SoapBindingUse.Literal, ParameterStyle=System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]
[EncryptMessage( StrKey = "pass")]
public string test() {
object[] results = this.Invoke("test", new object[0]);
return ((string)(results[0]));
}

Soap extension attributes are::[EncryptMessage( StrKey = "pass")]

I want set Soap Extension Attribute on client side, before than I use Soap Extension, when I call some web methods.

Example: I call some method, wich set soap extension attributes on both side, before than soap extension is used. Can somebody help me ?

[klerik123456]

I have problem, I want set soap extension attribute in web method:
Soap extension in web service:

public class EncryptMessageAttribute : SoapExtensionAttribute
{
private string strKey="null";
 
public void  setKey(string s)
{
strKey=s;
}
}

Soap extension class:

public class EncryptMessage : SoapExtension
{
....
}

Soap extension on web method:

public class Service1 : System.Web.Services.WebService
{
public string k;
 
[WebMethod]
[EncryptMessageAttribute(setKey(k))]
public string test2()
{
return "ok";
} 
[WebMethod]
[EncryptMessage(setKey(k))]
public string test2()
{
return "ok";
}
 
}

It finish with this compile error:

Error 1 The name 'setKey' does not exist in the current context
Error 2 An object reference is required for the non-static field, method, or property

Can somebody help me??