未使用 ASP.NET WebService 将值插入 SQL Server DB

Question

我对编程相当陌生，刚开始在 Microsoft Visual Studio 2017 中使用 ASP.NET C# 使用 WebService。我还将 KSoap2 下载到 Android Studio 中，并计划通过 WebService 将用户数据插入 SQL Server DB。然而，什么也没发生。如果你们都可以看看我的代码并就哪里出了问题给我反馈，那就太好了。谢谢大家！！

这是我的 ASP.NET WebService 代码：

[WebMethod]
public Boolean InsertUser(string firstName, string lastName, string email, string password)
{
    SqlConnection conn = ConnectionManager.GetConnection();
    conn.Open();
    SqlCommand cmd = new SqlCommand("INSERT INTO dbo.UserData(firstName, lastName, email, password) VALUES('" + firstName + "', '" + lastName + "', '" + email + "', '" + password + "')", conn);
    cmd.ExecuteNonQuery();
    conn.Close();
    return true;
}

这是我在 Android Studio 中的代码：

public class TestCreateAcc extends AppCompatActivity {

TextView tvS;
EditText etFN, etLN, etE, etP, etCP;
Button btnSub;
String firstName, lastName, email, password, confirmPwd;
String displayText;

private static final String SOAP_ACTION = "http://tempuri.org/InsertUser";
private static final String OPERATION_NAME = "InsertUser";
private static final String WSDL_TARGET_NAMESPACE = "http://tempuri.org/";
private static final String SOAP_ADDRESS = "http://10.0.1.86:53877/Service.asmx";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test_create_acc);

    tvS = (TextView) findViewById(R.id.tvS);

    btnSub = (Button) findViewById(R.id.btnSub);
    btnSub.setOnClickListener(  new OnClickListener(){
        public void onClick(View v)
        {
            etFN = (EditText) findViewById(R.id.etFN);
            etLN = (EditText) findViewById(R.id.etLN);
            etE = (EditText) findViewById(R.id.etE);
            etP = (EditText) findViewById(R.id.etP);
            etCP = (EditText) findViewById(R.id.etCP);

            firstName = etFN.getText().toString().trim();
            lastName = etLN.getText().toString().trim();
            email = etE.getText().toString().trim();
            password = etP.getText().toString().trim();
            confirmPwd = etCP.getText().toString().trim();
            if(firstName.isEmpty() && lastName.isEmpty() && email.isEmpty() && password.isEmpty() && confirmPwd.isEmpty())
            {
                tvS.setVisibility(View.VISIBLE);
                tvS.setText("Fields cannot be left empty!!!");
                tvS.setTextColor(Color.parseColor("#FF0000"));
            }
            else if(!confirmPwd.equals(password))
            {
                tvS.setVisibility(View.VISIBLE);
                tvS.setText("Passwords do not match!!!");
                tvS.setTextColor(Color.parseColor("#FF0000"));
            }
            else
            {
                AsyncCallWS task = new AsyncCallWS();
                task.execute();
            }
        }
    });
}

class AsyncCallWS extends AsyncTask<String, String, String> {
    @Override
    protected void onPreExecute(){
        tvS.setVisibility(View.INVISIBLE);
    }


    @Override
    protected String doInBackground(String... params){
            SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE, OPERATION_NAME);

            PropertyInfo FirstName = new PropertyInfo();
            FirstName.setName("firstName");
            FirstName.setValue(params[0]);
            FirstName.setType(String.class);

            PropertyInfo LastName = new PropertyInfo();
            LastName.setName("lastName");
            LastName.setValue(params[1]);
            LastName.setType(String.class);

            PropertyInfo Email = new PropertyInfo();
            Email.setName("email");
            Email.setValue(params[2]);
            Email.setType(String.class);

            PropertyInfo Password = new PropertyInfo();
            Password.setName("password");
            Password.setValue(params[3]);
            Password.setType(String.class);

            request.addProperty(FirstName);
            request.addProperty(LastName);
            request.addProperty(Email);
            request.addProperty(Password);

            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);
            envelope.dotNet = true;
            envelope.setOutputSoapObject(request);

            HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);
            httpTransport.debug = true;
        try{
            httpTransport.call(SOAP_ACTION, envelope);
            SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
            String res = response.toString() + "\n";
            res += httpTransport.requestDump + "\n" + httpTransport.responseDump;
            return res;
        }catch(Exception ex){
            return ex.toString();
        }
    }

    @Override
    protected void onProgressUpdate(String... values){

    }

    @Override
    protected void onPostExecute(String result){
        super.onPostExecute(result);
        tvS.setVisibility(View.VISIBLE);
        displayText = "Success!!";
        tvS.setTextColor(Color.parseColor("#00FF00"));
        tvS.setText(displayText);
        Intent register = new Intent(TestCreateAcc.this, DriverLicenseActivity.class);
        startActivity(register);
    }

}

谢谢！！ :)

编辑：我正在使用实际的 Android 设备，这些是我遇到的错误：

org.apache.http.conn.HttpHostConnectException：与http://mobilesystemservice.com 的连接被拒绝 返回数据不能为空！ java.lang.ArrayIndexOutOfBoundsException：长度=0；索引=1

Answer 1

我不确定您是否从param 参数中获得了任何值。但是你可以做的是首先检查将所有代码放入 try-catch 块中，然后检查是否从 param 中获取任何值，然后将参数设置为简单的字符串。

protected String doInBackground(String... params)
{   
    try
    {
        SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE, OPERATION_NAME);
        //add properties to SOAP object
        //http://kobjects.org/ksoap2/doc/api/org/ksoap2/serialization/SoapObject.html#addProperty(java.lang.String, java.lang.Object)
        request.addProperty("firstname", "");
        request.addProperty("lastName", "");
        request.addProperty("email", "");
        request.addProperty("password", "");

        int increment = 0;
        //use foreach to avoid out of bound index
        foreach(String p : params)
        {
            if (p != null)
            {
                //set properties to soap object
                //http://kobjects.org/ksoap2/doc/api/org/ksoap2/serialization/KvmSerializable.html#setProperty(int, java.lang.Object)
                switch(increment)
                {
                    case 0:
                        request.setProperty(increment, p);
                    break;
                    case 1:
                        request.setProperty(increment, p);
                    break;
                    case 2:
                        request.setProperty(increment, p);
                    break;
                    case 3:
                        request.setProperty(increment, p);
                    break;
                }               
            }
            increment++;
        }

        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);
        envelope.dotNet = true;
        envelope.setOutputSoapObject(request);

        HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);
        httpTransport.debug = true;

        httpTransport.call(SOAP_ACTION, envelope);
        SoapPrimitive response = (SoapPrimitive) envelope.getResponse();
        String res = response.toString() + "\n";
        res += httpTransport.requestDump + "\n" + httpTransport.responseDump;
        return res;
    }
    catch(Exception ex)
    {
        return ex.toString();
    }
}

只是基于this document

希望这会对您有所帮助。

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