IOS 调用C#写的Webservice ，传递的参数到Webservice取出的值为NULL

问题描述：IOS 调用C#写的Webservice ，传递的参数到Webservice取出的值为NULL，传递前在IOS里测试能取到值，麻烦用过这块的帮我看一下，已困扰我两天 啦~~哈哈

代码：

NSMutableString *tps=[NSMutableString stringWithString:@""]; //存储参数名称
NSMutableString *vps=[NSMutableString stringWithFormat:@""];//存储参数值
NSMutableString *ts=[NSMutableString stringWithFormat:@""];//组合字符串变量
NSMutableString *mreakString=[NSMutableString stringWithFormat:@""];//组合字符串变量
[mreakString appendString:@"<"];
[mreakString appendString:MethodName]; //方法名
[mreakString appendString:@" xmlns=\"http://tempuri.org/\">"];
//[ParametersKey count]

for (int i = 0; i <[ParametersKey count]; i++)
{
    tps = [ParametersKey objectAtIndex:i];
    vps = [ParametersValue objectAtIndex:i];
    [ts appendString:@"<"];
    [ts appendString:@"cnono"];//参数名
    [ts appendString:@">"];
    [ts appendString:@"17"]; //参数值  （--- 17 传递到webservice为NULL值 ----）
    [ts appendString:@"</"];
    [ts appendString:@"cnono"];
    [ts appendString:@">"];
    [mreakString appendString:ts];
}
[mreakString appendString:@"</"];
[mreakString appendString:MethodName];
[mreakString appendString:@">"];
NSMutableString *soapMessage2=[NSMutableString stringWithFormat:@""];;
[soapMessage2 appendString:@"</soap:Envelope>"];

生成的协议字符串为：

requestData-----><?xml version="1.0" encoding="utf-8"?>



/soap:Body
/soap:Envelope

<cnono>17</cnono>

/soap:Envelope

服务器返回的串为：

<?xml version="1.0" encoding="utf-8"?>soap:Body1:webservicer return:Sql=delete from C where Cno=,param=/soap:Body/soap:Envelope

问题解决了是拼接的SOAP串的事，按照标准的串拼接后，问题解决。

标准串：
SOAP 1.1

以下是 SOAP 1.2 请求和响应示例。所显示的占位符需替换为实际值。
POST /StockTest/Service1.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://tempuri.org/deleteCargoInfo"

<?xml version="1.0" encoding="utf-8"?>

soap:Body

string

/soap:Body
/soap:Envelope

首先检查返回对不对，显然返回了一些东西，如果正确，就是最后对象反序列化的问题了。

感谢楼上的回答，您说的反序列化是啥意思呢，麻烦你再指点一下，最好有事例代码。
一下是我webservice 对应的方法代码
///
/// 删除一条货物信息
///
/// 货物编号
public string deleteCargoInfo(string cnono)
{
try
{
if (cnono == null)
{
cnono = "16";
}
sql = "delete from C where Cno=" + cnono;
SqlCommand cmd = new SqlCommand(sql, sqlCon);
cmd.ExecuteNonQuery();
cmd.Dispose();

            return "1:webservicer return:Sql=" + sql + ",param=" + cnono;
        }
        catch (Exception)
        {
            return "0:webservicer return:Sql=" + sql + ",param=" + cnono;
        }
    }