关于c#调取webservice时候的错误

try
{
 SinServicesGet.SinServices SinGet = new SinServicesGet.SinServices();
   string url = SinGet.OpenSinNotMap(txtTaskId.Text.ToString(),texTaskQY.Text.ToString());//调用那个services	
}
catch(WebException)	//网络不通
{

}
catch(SoapException)	//调用services出错，主要是这个，用soap就行了
{

}
catch(SqlException)	//数据库连接失败
{

}
catch(TimeoutException)
{

}
catch(Exception)
{

}