I want to store base64 string (BMP image) into oracle 11g database.
few links i have gone through-
http://forums.asp.net/t/1061466.aspx?how+to+save+image+in+oracle+blob+field+
http://www.dba-oracle.com/t_storing_insert_photo_pictures_tables.htm
But I am not getting it how to do this? I have written a code with using this link -
http://www.technicalkeeda.com/spring-tutorials/insert-image-using-spring-jdbctemplate
My Table:
CREATE TABLE profile_image (img_title VARCHAR2(20) NOT NULL, img_data blob,);
My code with db Query:
File file = new File("Picture.bmp");
if (file.exists())
{
file.delete();
}
OutputStream stream;
try (stream = new FileOutputStream(file))
{
stream.write(data);//data is byte array converted from base64 string
}
catch (IOException e)
{
e.printStackTrace();
}
final String UPDATE_USER_PROFILE_PICTURE = "UPDATE profile_image SET img_data = ? WHERE img_title = ?";
final Object[] replacementObjectList = new Object[]
{ new SqlLobValue(stream, (int) file.length(), lobHandler), image_title };
final int count = jdbcTemplate.update(UPDATE_USER_PROFILE_PICTURE, replacementObjectList, new int[]
{ Types.BLOB, Types.VARCHAR });
if(count>0)
{return success;}
else
{return failure;}
But this query is not updating blob image data and returning failure. Any help?
Related
I have managed to connect to the OracleDb and use the OracleDataReader to retrieve the data from the DB. The problem i have is that i now want to insert the retrieved data in my model (Invoice). The problem right now is that i cant convert the retrieved data to a type that is accepted by the model. Is there a way to convert the OracleDataReader reader to a type that is accepted by the model so i can fil the model (IEnumerable) with data?
public ViewResult search_btn(object sender, EventArgs e, string docno){
OracleConnection OC = new OracleConnection("SOMECONNECTIONSTRING");
OracleCommand getBlobRecord = new OracleCommand("select * from xx where invoice_no=:invoiceId", OC);
getBlobRecord.Parameters.Add(new OracleParameter("invoiceId", docno));
OC.Open();
using (OracleDataReader reader = getBlobRecord.ExecuteReader(CommandBehavior.SequentialAccess))
{
try
{
while (reader.Read())
{
var x = reader["invoice_no"];
var y = reader["supplier_id"];
new Invoice
{
Invoice_No = (int)x,
Supplier_Id = (int)y
};
}
reader.Close();
reader.Dispose();
return View("Index");
}
finally
{
reader.Close();
OC.Close();
}
}}
I have the following two methods that handles taking photos from a camera and picking photos from a library. They're both similar methods as at the end of each method, I get an ImageSource back from the Stream and I pass it onto another page which has an ImageSource binding ready to be set. These two method work perfectly. The next step now is to save the Image in SQLite so I can show the images in a ListView later on. My question for the XamGods (Xamarin Pros =), what is the best way to save image in SQLite in 2019? I have been in the forums for hours and I still don't have a tunnel vision on what I want to do. I can either
Convert Stream into an array of bytes to save in Sqlite.
Convert ImageSource into an array of bytes (messy/buggy).
Somehow retrieve the actual Image selected/taken and convert that into an array of bytes into SQLite
I'm sorry if my question is general, but Xamarin does not provide a clear-cut solution on how to save images in SQLite and you can only find bits and pieces of solutions throughout the forums listed below.
How to save and retrieve Image from Sqlite
Load Image from byte[] array.
Creating a byte array from a stream
Thank you in advance!
private async Task OnAddPhotoFromCameraSelected()
{
Console.WriteLine("OnAddPhotoFromCameraSelected");
var photo = await Plugin.Media.CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions() { });
var stream = photo.GetStream();
photo.Dispose();
if (stream != null)
{
ImageSource cameraPhotoImage = ImageSource.FromStream(() => stream);
var parms = new NavigationParameters();
parms.Add("image", cameraPhotoImage);
var result = await NavigationService.NavigateAsync("/AddInspectionPhotoPage?", parameters: parms);
if (!result.Success)
{
throw result.Exception;
}
}
}
private async Task OnAddPhotoFromLibrarySelected()
{
Console.WriteLine("OnAddPhotoFromLibrarySelected");
Stream stream = await DependencyService.Get<IPhotoPickerService>().GetImageStreamAsync();
if (stream != null)
{
ImageSource selectedImage = ImageSource.FromStream(() => stream);
var parms = new NavigationParameters();
parms.Add("image", selectedImage);
parms.Add("stream", stream);
var result = await NavigationService.NavigateAsync("/AddInspectionPhotoPage?", parameters: parms);
if (!result.Success)
{
throw result.Exception;
}
}
}
As Jason said that you can save image path into sqlite database, but if you still want to save byte[] into sqlite database, you need to convert stream into byte[] firstly:
private byte[] GetImageBytes(Stream stream)
{
byte[] ImageBytes;
using (var memoryStream = new System.IO.MemoryStream())
{
stream.CopyTo(memoryStream);
ImageBytes = memoryStream.ToArray();
}
return ImageBytes;
}
Then load byte[] from sqlite, converting into stream.
public Stream BytesToStream(byte[] bytes)
{
Stream stream = new MemoryStream(bytes);
return stream;
}
For simple sample, you can take a look:
Insert byte[] in sqlite:
private void insertdata()
{
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "sqlite1.db3");
using (var con = new SQLiteConnection(path))
{
Image image = new Image();
image.Content = ConvertStreamtoByte();
var result = con.Insert(image);
sl.Children.Add(new Label() { Text = result > 0 ? "insert successful insert" : "fail insert" });
}
}
Loading image from sqlite:
private void getdata()
{
var path = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "sqlite1.db3");
using (var con = new SQLiteConnection(path))
{
var image= con.Query<Image>("SELECT content FROM Image ;").FirstOrDefault();
if(image!=null)
{
byte[] b = image.Content;
Stream ms = new MemoryStream(b);
image1.Source = ImageSource.FromStream(() => ms);
}
}
}
Model:
public class Image
{
[PrimaryKey, AutoIncrement]
public int Id { get; set; }
public string FileName { get; set; }
public byte[] Content { get; set; }
}
We were using the apache file uploads for uploading a file and below code was used for the same.
ServletFileUpload upload = new ServletFileUpload(itemFactory);
List<FileItem> items = upload.parseRequest(request);
Iterator<FileItem> iterator = items.iterator();
while (iterator.hasNext()) {
FileItem item = iterator.next();
if (item.isFormField()) {
String name = item.getFieldName();
String value = item.getString();
conf.put(name, value);
} else {
InputStream is = item.getInputStream();
byte[] bytes = ByteStreams.toByteArray(is);
String query = new String(bytes, "UTF-8");
conf.put("test", query);
}
}
But we recently moved to Spring boot and trying to use spring multipart to upload a file.The code which will replace the above code will be
DefaultMultipartHttpServletRequest requestMain = (DefaultMultipartHttpServletRequest) request;
Iterator<String> fileNameIterator = requestMain.getFileNames();
ListIterator<MultipartFile> iterator = null;
while (fileNameIterator.hasNext()) {
multipartFiles = requestMain.getFiles(fileNameIterator.next());
iterator = multipartFiles.listIterator();
while (iterator.hasNext()) {
MultipartFile item = iterator.next();
if (item.isEmpty()) {
// String name = item.getFieldName();
// String value = item.getString();
// conf.put(name, value);
} else {
InputStream is = item.getInputStream();
byte[] bytes = ByteStreams.toByteArray(is);
String query = new String(bytes, "UTF-8");
conf.put("query", query);
}
}
}
But I am not able to figure out how to check if the file has a form field in spring boot.In apache file upload it was achieved using item.isFormField() method.
You don't need to check if the item is form field.
The requestMain.getFiles(fileNameIterator.next()); method will return a MultipartFile so you know is not a form field.
To get the form fields use
requestMain.getParameterMap()
Or, for a specific field use
requestMain.getParameter("field")
I am totally new in web api. I have created web api simply to retrive data from oracle DB with the help of few articles which i found on internet. I am trying to find out error since morning but no success till now. When i try to run the code, it dont give any error or anything. Debugger passed to my DB class and stops. Below is my controller code.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using System.Data;
using System.Data.SqlClient;
namespace iLearnWebApi.Controllers
{
public class ValuesController : ApiController
{
DAL.DBAccess dblayer = new DAL.DBAccess();
public DataSet Getrecord(int programid)
{
DataSet ds = dblayer.GetRecordbyid(programid);
return ds;
}
} }
And below is my DBClass code.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using System.Security.Cryptography;
using System.Configuration;
using System.Data.Odbc;
using Oracle.ManagedDataAccess.Client;
namespace iLearnWebApi.DAL
{
public class DBAccess
{
OracleParameter[] _objOraParam;
OracleConnection con = new OracleConnection();
//--- Get Records By Program ID
public DataSet GetRecordbyid(int progid)
{
DataSet ds = new DataSet();
try
{
_objOraParam = new OracleParameter[2];
_objOraParam[0] = new OracleParameter("p_Program_ID", OracleDbType.Int32);
_objOraParam[0].Direction = ParameterDirection.Input;
_objOraParam[0].Value = progid;
_objOraParam[1] = new OracleParameter("RCT_OUT", OracleDbType.RefCursor);
_objOraParam[1].Direction = ParameterDirection.Output;
ds = ExecuteDataset(con, CommandType.StoredProcedure, "ILS_USP_PROGRAM_DATA", _objOraParam);
}
catch (Exception ex)
{
LogError("GetRecordbyid", ex.Message.ToString());
throw ex;
}
finally
{
con.Close();
}
return ds;
}
// Execute Data
private DataSet ExecuteDataset(OracleConnection con, CommandType procname, string commandText, params OracleParameter[] objOraParam)
{
//create a command and prepare it for execution
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, con, (OracleTransaction)null, procname, commandText, objOraParam);
//create the DataAdapter & DataSet
OracleDataAdapter da = new OracleDataAdapter(cmd);
DataSet ds = new DataSet();
//fill the DataSet using default values for DataTable names, etc.
da.Fill(ds);
cmd.Dispose();
//return the dataset
return ds;
}
//---- Used To Prepare Oracle command
private void PrepareCommand(OracleCommand command, OracleConnection connection, OracleTransaction transaction, CommandType commandType, string commandText, OracleParameter[] commandParameters)
{
//if the provided connection is not open, we will open it
string con_string = ConfigurationManager.ConnectionStrings["OracleConnectionString"].ConnectionString;
if (connection.State != ConnectionState.Open)
{
connection.ConnectionString = DecryptString(con_string, "CFSENC");
connection.Open();
}
//associate the connection with the command
command.Connection = connection;
//set the command text (stored procedure name or Oracle statement)
command.CommandText = commandText;
//if we were provided a transaction, assign it.
if (transaction != null)
{
command.Transaction = transaction;
}
//set the command type
command.CommandType = commandType;
//attach the command parameters if they are provided
if (commandParameters != null)
{
AttachParameters(command, commandParameters);
}
return;
}
// Used For Attaching Parameter To Command
private void AttachParameters(OracleCommand command, OracleParameter[] commandParameters)
{
foreach (OracleParameter p in commandParameters)
{
//check for derived output value with no value assigned
if ((p.Direction == ParameterDirection.InputOutput) && (p.Value == null))
{
p.Value = DBNull.Value;
}
command.Parameters.Add(p);
}
}
// Used For Decryption Of Encrypted String
private string DecryptString(string con_string, string key)
{
byte[] plainBytes = null;
try
{
string passWord = key;
string strInput = con_string;
byte[] encryptBytes = Convert.FromBase64String(strInput);
MemoryStream ms = new MemoryStream(strInput.Length);
//Using triple des for decryption
TripleDESCryptoServiceProvider tDesCsp = new TripleDESCryptoServiceProvider();
// Creating decryption IV and Key using the key supplied by the user
tDesCsp.IV = new byte[8];
PasswordDeriveBytes pdb = new PasswordDeriveBytes(passWord, new byte[0]);
tDesCsp.Key = pdb.CryptDeriveKey("RC2", "MD5", 128, new byte[8]);
CryptoStream deEnStream = new CryptoStream(ms, tDesCsp.CreateDecryptor(), CryptoStreamMode.Write);
//write the decrypted data to the stream
deEnStream.Write(encryptBytes, 0, encryptBytes.Length);
deEnStream.FlushFinalBlock();
plainBytes = new byte[ms.Length];
ms.Position = 0;
//reading the decrypted stream and write it into the byte array
ms.Read(plainBytes, 0, (int)ms.Length);
deEnStream.Close();
}
catch (Exception err)
{
string sErr = err.ToString();
throw new Exception("Error decrypting string.");
}
return Encoding.UTF8.GetString(plainBytes);
}
// For Writing Log Files
private void LogError(string header, string error)
{
string strPath;
string strActualError;
StreamWriter objErrWriter;
DateTime objDt = DateTime.Now;
string strDate;
strDate = objDt.ToString("ddMMyyyy");
try
{
// Get Actual Path of "Error" stored in Web.config
strPath = ConfigurationManager.AppSettings["sPathErrorLog"];
//Generates Path & LogFile Name of ErrorLog
strPath = strPath + strDate + ".log";
// Generates Error Message
strActualError = DateTime.Now + " : " + header + " : " + error;
// Creation of File.
objErrWriter = new StreamWriter(strPath, true, System.Text.Encoding.ASCII);
objErrWriter.WriteLine("");
objErrWriter.WriteLine(strActualError);
objErrWriter.Close();
}
catch (Exception ex)
{
throw ex;
}
}
}}
Can anyone please tell me what mistake i have done in above code.
This sounds like a routing issue (without seeing your route config).
Try changing: public DataSet Getrecord(int programid)
To: public DataSet Get(int id)
And call: localhost:60908/api/Values/1
I am trying to extract data from below mention json format by pig using jsonLoader():
{"Partition":"10","Key":"618897","Properties2":[{"K":"A","T":"String","V":"M "}, {"K":"B","T":"String","V":"N"}, {"K":"D","T":"String","V":"O"}]}
{"Partition":"11","Key":"618900","Properties2":[{"K":"A","T":"String","V":"W”"},{"K":"B","T":"String","V":"X"}, {"K":"C","T":"String","V":"Y"},{"K":"D","T":"String","V":"Z"}]}
Right now I am able to extract data from “partition” ,“key” and “V” for every array objects with the following code:
A= LOAD '/home/hduser/abc.jon' Using JsonLoader('Partition:chararray,Key:chararray,Properties2:{(K:chararray,T:chararray,V:chararray)},Timestamp:chararray');
B= foreach A generate $0,$1,BagToString(Properties2.V,'\t') as vl:chararray;
store B into './Result/outPut2';
From above code I am getting "Properties2" array value on the sequence basis not column basis, it is creating problem whenever sequence changed or new object comes in existence.
Please help me to extract data on the basis of column( K values.)
My Output
Expected Output
Thanks In Advance
You have two options here
1.Use elephant-bird which will give you a map of key and value.
A = LOAD '/apps/pig/json_sample' USING com.twitter.elephantbird.pig.load.JsonLoader('-nestedLoad') as (json:map[]);
B = FOREACH A GENERATE json#'Partition',json#'Key',json#'Properties2';
dump B;
will give you an output of :
(10,618897,{([T#String,K#A,V#M ]),([T#String,K#B,V#N]),([T#String,K#D,V#O])})
(11,618900,{([T#String,K#A,V#W”]),([T#String,K#B,V#X]),([T#String,K#C,V#Y]),([T#String,K#D,V#Z])})
Or you have to write a custom loader which has to do this
a).It should know what is the correct order of values that will be coming
for the key K
b).Go through each of these values and see if the json is missing any of this key and return an empty/null char for that location.
Am posting the getNext() method of the CustomJsonLoader which will do the same:
#Override
public Tuple getNext() throws IOException {
// TODO Auto-generated method stub
try {
boolean notDone = in.nextKeyValue();
if (!notDone) {
return null;
}
Text value = (Text) in.getCurrentValue();
List<String> valueList = new ArrayList<String>();
if (value != null) {
String jsonString = value.toString();
System.out.println(jsonString);
JSONParser parser = new JSONParser();
JSONObject obj = null;
try {
obj = (JSONObject) parser.parse(jsonString);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("obj is "+obj);
if (obj != null) {
String partition = (String) obj.get("Partition");
String key = (String) obj.get("Key");
valueList.add(partition);
valueList.add(key);
JSONArray innArr = (JSONArray) obj.get("Properties2");
char[] innKeys = new char[] { 'A', 'B', 'C', 'D' };
Map<String,String> keyMap = new HashMap<String,String>();
for (Object innObj : innArr) {
JSONObject jsonObj = (JSONObject) innObj;
keyMap.put(jsonObj.get("K")+"",jsonObj.get("V")+"");
}
for (int i = 0; i < innKeys.length; i++) {
char ch = innKeys[i];
if (keyMap.containsKey(ch+"")) {
valueList.add(keyMap.get(ch+""));
}else{
valueList.add("");
}
}
Tuple t = tupleFactory.newTuple(valueList);
return t;
}
}
return null;
} catch (InterruptedException e) {
}
}
and register it and run :
REGISTER udf/CustomJsonLoader.jar
A = LOAD '/apps/pig/json_sample' USING CustomJsonLoader();
DUMP A;
(10,618897,M,N,,O)
(11,618900,W,X,Y,Z)
Hope this helps!