android 使用ksoap2 jar包时，服务器端没有接收到参数为null，报空指针，能帮忙看下什么问题吗？

[sophialise]

public class ConnectSQL {
	/**
	 * @return WebService的返回.值
	 */
	private static String WEB_SERVICE_URL = "http://*.*:80/Service1.asmx?op=";//测试
	
	private static String Namespace = "http://tempuri.org/";
	
	String ExceptionResult = null;
	
	public String CallWebService(String MethodName, Map<String, String> Params) {
		try {
			// 1、指定webservice的命名空间和调用的方法名
			SoapObject request = new SoapObject(Namespace, MethodName);
			// 2、设置调用方法的参数值，如果没有参数，可以省略，
			if (Params != null) {
				@SuppressWarnings("rawtypes")
				Iterator iter = Params.entrySet().iterator();
				while (iter.hasNext() && iter != null) {
					@SuppressWarnings("rawtypes")
					Map.Entry entry = (Map.Entry) iter.next();
					// 设置需调用WebService接口需要传入的参数
					// 原来写法
//					request.addProperty((String) entry.getKey(), (String) entry.getValue());
//					soapObject.addProperty(key, params.get(key));
//					//  修改后的写法(设置需调用WebService接口需要传入的参数)
					PropertyInfo pi = new PropertyInfo();
					pi.setNamespace(Namespace);
					pi.setName((String) entry.getKey());
					pi.setValue((String) entry.getValue());
					pi.setType(entry.getValue().getClass());
					request.addProperty(pi);
				}
			}
			// 3、生成调用Webservice方法的SOAP请求信息。该信息由SoapSerializationEnvelope对象描述
			// 创建SoapSerializationEnvelope 对象，同时指定soap版本号
			SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);
			// 由于是发送请求，所以是设置bodyOut
			envelope.bodyOut = request;
			// c#写的应用程序必须加上这句,是.net开发的webservice，所以这里要设置为true
			envelope.dotNet = true;
			HttpTransportSE ht = new HttpTransportSE(WEB_SERVICE_URL, 20000);
			try {
				// 使用call方法调用WebService方法
				ht.call(null, envelope);
			} catch (HttpResponseException e) {
				ExceptionResult = "发生异常信息如下:" + e.toString() ;
			} catch (IOException e) {
				ExceptionResult = "发生异常信息如下:" + e.toString() ;
			} catch (XmlPullParserException e) {
				ExceptionResult = "发生异常信息如下:" + e.toString() ;
			} 
			// 获取返回的数据
			SoapObject object = (SoapObject) envelope.bodyIn;
			// 获取返回的结果
			String result = object.getProperty(0).toString();
			if (result != null) {
				return result;
			}
		} catch (Exception e) {
			return "发生异常信息如下:未知错误" + e.toString() ;
		}
		return ExceptionResult;
	}
}

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using LinkedMesService.Linked;
using System.Drawing.Printing;
using System.Drawing;

namespace LinkedMesService
{
   
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    public class Service1 : System.Web.Services.WebService
    {
        public string getResult(string sql)
        {
            return LoadResult.loadData(sql);
        }

        public string insertData(string sql)
        {
            return LoadResult.insertData(sql);
        }

        public int insertProc(string tableName,string fields,string values)
        {
            return LoadResult.insertProc(tableName,fields, values);
        }

        public String selectMBRowData(string WorkOrderNo,string CreatePS,string ActionName, string Shift,string machineNo, string lotNo)
        {
            return LoadResult.selectMBRowData(WorkOrderNo, CreatePS, ActionName, Shift,machineNo, lotNo);
        }

        public String initButtonStatus(string machineNo, string procName)
        {
            return LoadResult.initButtonStatus(machineNo, procName);
        }


        public String getWaferInfo(string selectCondition)
        {
            return LoadResult.getWaferInfo(selectCondition);
        }


        public String getRowNum(string WorkOrderNo)
        {
            return LoadResult.getRowNum(WorkOrderNo);
        }


        public String UpdatePutInQty(string WorkOrderNo, string BatchNo)
        {
            return LoadResult.UpdatePutInQty(WorkOrderNo, BatchNo);
        }


        public String productVsMaterial(string WorkOrderNo, string CreatePS, string ActionName, string ActionDesc,
            string MachineNo, string NowAntennaBatchNo, string NowWaferBatchNo, string NowACPBatchNo,string nowMinAcpNo,string procName)
        {
            return LoadResult.productVsMaterial(WorkOrderNo, CreatePS, ActionName, ActionDesc, MachineNo,
                NowAntennaBatchNo, NowWaferBatchNo, NowACPBatchNo,nowMinAcpNo, procName);
        }


        public String getBigBatchNo(string MachineNo, int GoodOrBad, string procName)
        {
            return LoadResult.getBigBatchNo(MachineNo, GoodOrBad, procName);
        }


        public String LoadingBatchNo(string BatchNoString,string PrevBatchNoString,string WorkOrderNo, string CreatePS, string MachineNo, string ActionName,int RelationNo, string procName)
        {
            return LoadResult.LoadingBatchNo(BatchNoString, PrevBatchNoString, WorkOrderNo, CreatePS, MachineNo, ActionName, RelationNo,procName);
        }

        public String getMaterialNoDifference(string machineNo, string materialNo, string workOrderNo, string Operator, string actionName, string procName)
        {
            return LoadResult.getMaterialNoDifference(machineNo, materialNo, workOrderNo, Operator, actionName, procName);
        }

        public String getRelationNo(string machineNo, string workOrderNo, string Operator,string actionName,string procName)
        {
            return LoadResult.getRelationNo(machineNo, workOrderNo, Operator,actionName, procName);
        }

        public String getMaterialReport(string MBatchNo, string WorkOrderNo,string ActionName,string MachineNo, string procName)
        {
            return LoadResult.getMaterialReport(MBatchNo, WorkOrderNo, ActionName,MachineNo, procName);
        }

        public String getOrderStuationReport(string WorkOrderNo, string Shift, string MachineNo,string procName)
        {
            return LoadResult.getOrderStuationReport(WorkOrderNo, Shift,MachineNo, procName);
        }

    }
}

这是报错信息

几个方法同时连接数据库，有的方法执行成功 ，有的方法就会提示如下图的报错信息，有时调用一个方法也不成功，数据不能插入数据库，有时方法会被多次执行，数据库生成重复数据，实在没调出来什么哪个地方有问题，但是换个网络，这种问题发生频率会小很多，还有就是提示这样的错之后，关机重启就ok了，能帮忙看下什么问题吗？