I´ve stream video on a pictureBox control, and I want to get image from PictureBox, to store on a table on SQL Server. PictureBox show stream but, PictureBox retrieve null.
What is wrong?
private void button1_Click(object sender, EventArgs e){
SqlConnection con = new SqlConnection("Data Source=IBM-PC\\SQLEXPRESS2;Initial Catalog=DBACCESS;Integrated Security=True");
if (cmrConductor.Image == null){
mensajeOK("Error");
}else{
MemoryStream ms = new MemoryStream();
cmrConductor.Image.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
byte[] Pic_arr = new byte[ms.Length];
ms.Position = 0;
ms.Read(Pic_arr, 0, Pic_arr.Length);
SqlCommand cmd = new SqlCommand("INSERT INTO tblUsers (fldCode, fldPic) VALUES (#fldCode, #fldPic)", con);
cmd.Parameters.AddWithValue("#fldCode", txtId.Text);
cmd.Parameters.AddWithValue("#fldPic", Pic_arr);
con.Open();
try{
int res = cmd.ExecuteNonQuery();
if (res > 0){
MessageBox.Show("insert");
}
}
catch (Exception ex){
MessageBox.Show(ex.Message);
}
finally{
con.Close();
}
}
}
You need to set your image field type as varbinary(MAX) and you need to convert your image into a byte array before inserting.
//Insert image
SqlCommand comm = new SqlCommand("Insert into ImageColumn values (#Image)")
comm.Parameters.AddWithValue("#Image", Converter.GetBytes(pictureBox.image));
//Retrieving image
pictureBox1.Image = Converter.GetImage(dataTable.Rows[0]["ImageColumn"])
//Converter class
class Converter
{
public static byte[] GetBytes(System.Drawing.Image imageIn)
{
using (var ms = new MemoryStream())
{
imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
return ms.ToArray();
}
}
public static byte[] GetBytes(string path)
{
using (var ms = new MemoryStream())
{
Image img = Image.FromFile(path);
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
return ms.ToArray();
}
}
public static Image GetImage(byte[] buffer)
{
using (var ms = new MemoryStream(buffer))
{
return Image.FromStream(ms);
}
}
}
Here is the solution, thanks to this post Saving Panel as an Image. I just had to change PictureBox control by a Panel control.
private void button1_Click(object sender, EventArgs e){
SqlConnection con = new SqlConnection("Data Source=IBM-PC\\SQLEXPRESS2;Initial Catalog=DBACCESS;Integrated Security=True");
MemoryStream ms = new MemoryStream();
Bitmap bmp = new Bitmap(cmrConductor.Width, cmrConductor.Height);
cmrConductor.DrawToBitmap(bmp, cmrConductor.Bounds);
bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
byte[] Pic_arr = new byte[ms.Length];
ms.Position = 0;
ms.Read(Pic_arr, 0, Pic_arr.Length);
SqlCommand cmd = new SqlCommand("INSERT INTO tblUsers (fldCode, fldPic) VALUES (#fldCode, #fldPic)", con);
cmd.Parameters.AddWithValue("#fldCode", txtId.Text);
cmd.Parameters.AddWithValue("#fldPic", Pic_arr);
con.Open();
try
{
int res = cmd.ExecuteNonQuery();
if (res > 0)
{
MessageBox.Show("insert");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
con.Close();
}
}
Related
I want to retrieve an image from an Oracle database to an Image control in asp.net. I tried but it's not working.
This is the code used for inserting image into database:
protected void btnUpload_Click(object sender, EventArgs e)
{
int imgLength = 0;
string imgContentType = null;
string imgFileName = null;
Stream imgStream = FileUpload.PostedFile.InputStream;
imgLength = FileUpload.PostedFile.ContentLength;
imgContentType = FileUpload.PostedFile.ContentType;
imgFileName = FileUpload.PostedFile.FileName;
if (imgContentType == "image/jpeg" || imgContentType == "image/gif" ||
imgContentType == "image/pjpeg"
|| imgContentType == "image/bmp")
{
OracleConnection DbConnection = new OracleConnection(con1);
DbConnection.Open();
FileStream fls;
fls = new FileStream(#imgFileName, FileMode.Open, FileAccess.Read);
byte[] blob = new byte[fls.Length];
fls.Read(blob, 0, System.Convert.ToInt32(fls.Length));
fls.Close();
string query = "insert into image(id,name,photo) values(1,'" + imgFileName + "'," + " :BlobParameter )";
// Establish a new OracleCommand
OracleCommand cmd = new OracleCommand();
cmd.CommandText = query;
cmd.Connection = DbConnection;
cmd.CommandType = CommandType.Text;
System.Data.OracleClient.OracleParameter paramImage = new System.Data.OracleClient.OracleParameter("image",
Oracle.DataAccess.Client.OracleDbType.Blob);
paramImage.ParameterName = "BlobParameter";
paramImage.Value = blob;
paramImage.Direction = ParameterDirection.Input;
cmd.Parameters.Add(paramImage);
cmd.ExecuteNonQuery();
}
Table:
Id Name Photo
1 C:\\user\pictures\animal.jpeg (BLOB)
Below is the code used to retrieve the image into an image control but this code is not working.
For the past two days I've been struggling with this
void GetImagesFromDatabase()
{
try
{
OracleConnection DbConnection = new OracleConnection(con1);
DbConnection.Open();
OracleCommand cmd = new OracleCommand("Select name,photo from Image", DbConnection);
OracleDataReader oda = cmd.ExecuteReader();
while (oda.Read())
{
string path = oda[0].ToString();
img.ImageUrl = path;
if(oda.GetValue(1).ToString() !=""){
FileStream fls;
fls = new FileStream(#path, FileMode.Open, FileAccess.Read);
byte[] blob = new byte[fls.Length];
fls.Read(blob, 0, System.Convert.ToInt32(fls.Length));
fls.Close();
MemoryStream memStream = new MemoryStream(blob);
img.ImageUrl = oda[2].ToString();
}
}
}
catch (Exception ex)
{
}
}
Any ideas? Thanks in advance
maybe this code can help you:
public Image byteArrayToImage(byte[] byteArrayIn)
{
MemoryStream ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms);
return returnImage;
}
I have a SQL Server (2008 R2) with an Image table, the table has a column with type image. I insert my Image into this column using
Stream fs = FileUpload1.PostedFile.InputStream;
BinaryReader br = new BinaryReader(fs);
Byte[] bytes = br.ReadBytes((Int32)fs.Length);
//insert the file into database
string strQuery = "insert into pm005.images(imageName, type, alt, img)" + " values (#Name, #ContentType, #Alt, #Data)";
SqlCommand cmd = new SqlCommand(strQuery);
cmd.Parameters.Add("#Name", SqlDbType.VarChar).Value = filename;
cmd.Parameters.Add("#ContentType", SqlDbType.VarChar).Value = contenttype;
cmd.Parameters.Add("#Alt", SqlDbType.VarChar).Value = TextBox1.Text;
cmd.Parameters.Add("#Data", SqlDbType.Binary).Value = bytes;
InsertUpdateData(cmd);
lblMessage.ForeColor = System.Drawing.Color.Green;
lblMessage.Text = "File Uploaded Successfully";
private Boolean InsertUpdateData(SqlCommand cmd)
{
// Open a connection the the SQL Server
SqlConnection con = new SqlConnection();
con.ConnectionString = "server=sql-server;integrated security=SSPI;database=pm005";
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
try
{
con.Open();
cmd.ExecuteNonQuery();
return true;
}
catch (Exception ex)
{
Response.Write(ex.Message);
return false;
}
finally
{
con.Close();
con.Dispose();
}
}
This i believe works fine, because the insert returns true, and i can see the data in the database.
However i cant for the life of me see how i'm supposed to get this image back out. Specifically what i want is to be able to call my web service, pass it the imageID and have the image (and only the image) returned to me. Much like its done with PHP. THis is the code im using now.
[WebMethod]
[ScriptMethod(UseHttpGet = true)]
public System.Drawing.Image getImage(int imageID, string uName, string pword)
{
string str="";
try
{
SqlCommand cmd = getSQLCommand("SELECT img FROM pm005.images WHERE id="+imageID);
byte[] Img = (byte[])cmd.ExecuteScalar();
// Convert the image record to file stream and display it to picture control
str = Convert.ToString(DateTime.Now.ToFileTime());
FileStream fs = new FileStream(str, FileMode.CreateNew, FileAccess.Write);
fs.Write(Img, 0, Img.Length);
fs.Flush();
fs.Close();
}
catch
{
}
finally
{
}
System.Drawing.Image theImage = System.Drawing.Image.FromFile(str);
return theImage;
}
Which gives the error:
System.ArgumentException: The path is not of a legal form.
at System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength)
at System.IO.Path.GetFullPathInternal(String path)
at System.IO.Path.GetFullPath(String path)
at System.Drawing.IntSecurity.UnsafeGetFullPath(String fileName)
at System.Drawing.IntSecurity.DemandReadFileIO(String fileName)
at System.Drawing.Image.FromFile(String filename, Boolean useEmbeddedColorManagement)
at WebService2.Service1.getImage(Int32 imageID, String uName, String pword)
I've looked at so many tutorials, and not find any solid answer except "use PHP". If i have to i will, but surely there must be a way to do it in ASP.NET?
Try specifying the Full FilePath:
FileStream fs = new FileStream(#"C:\Temp\YourFile.jpg", FileMode.CreateNew, FileAccess.Write);
Edit:
Rather than using the File System it sounds like you want to do it in memory:
public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
MemoryStream ms = new MemoryStream();
imageIn.Save(ms,System.Drawing.Imaging.ImageFormat.Gif);
return ms.ToArray();
}
public Image byteArrayToImage(byte[] byteArrayIn)
{
MemoryStream ms = new MemoryStream(byteArrayIn);
Image returnImage = Image.FromStream(ms);
return returnImage;
}
...
System.Drawing.Image theImage = null;
try
{
SqlCommand cmd = getSQLCommand("SELECT img FROM pm005.images WHERE id="+imageID);
byte[] Img = (byte[])cmd.ExecuteScalar();
theImage = byteArrayToImage(Img);
}
catch
{
}
finally
{
}
return theImage;
}
i'm trying to load images from database to a PictureBox. I use these following codes in order to load them to my picture. I've written some code but don't know what I should do for continuing.
Any help will be appreciated.
private void button1_Click(object sender, EventArgs e)
{
sql = new SqlConnection(#"Data Source=PC-PC\PC;Initial Catalog=Test;Integrated Security=True");
cmd = new SqlCommand();
cmd.Connection = sql;
cmd.CommandText = ("select Image from Entry where EntryID =#EntryID");
cmd.Parameters.AddWithValue("#EntryID", Convert.ToInt32(textBox1.Text));
}
Continue with something like this in the button1_Click:
// Your code first, here.
var da = new SqlDataAdapter(cmd);
var ds = new DataSet();
da.Fill(ds, "Images");
int count = ds.Tables["Images"].Rows.Count;
if (count > 0)
{
var data = (Byte[])ds.Tables["Images"].Rows[count - 1]["Image"];
var stream = new MemoryStream(data);
pictureBox1.Image = Image.FromStream(stream);
}
Assuming we have a simple database with a table called BLOBTest:
CREATE TABLE BLOBTest
(
BLOBID INT IDENTITY NOT NULL,
BLOBData IMAGE NOT NULL
)
We could retrieve the image to code in the following way:
try
{
SqlConnection cn = new SqlConnection(strCn);
cn.Open();
//Retrieve BLOB from database into DataSet.
SqlCommand cmd = new SqlCommand("SELECT BLOBID, BLOBData FROM BLOBTest ORDER BY BLOBID", cn);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds, "BLOBTest");
int c = ds.Tables["BLOBTest"].Rows.Count;
if(c>0)
{ //BLOB is read into Byte array, then used to construct MemoryStream,
//then passed to PictureBox.
Byte[] byteBLOBData = new Byte[0];
byteBLOBData = (Byte[])(ds.Tables["BLOBTest"].Rows[c - 1]["BLOBData"]);
MemoryStream stmBLOBData = new MemoryStream(byteBLOBData);
pictureBox1.Image= Image.FromStream(stmBLOBData);
}
cn.Close();
}
catch(Exception ex)
{MessageBox.Show(ex.Message);}
This code retrieves the rows from the BLOBTest table in the database into a DataSet, copies the most recently added image into a Byte array and then into a MemoryStream object, and then loads the MemoryStream into the Image property of the PictureBox control.
Full reference guide:
http://support.microsoft.com/kb/317701
private void btnShowImage_Click(object sender, EventArgs e)
{
string constr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=.\\PIS(ACU).mdb;";
Con = new OleDbConnection(#constr);
Con.Open();
Com = new OleDbCommand();
Com.Connection = Con;
Com.CommandText = "SELECT Photo FROM PatientImages WHERE Patient_Id = " + val + " ";
OleDbDataReader reader = Com.ExecuteReader();
if (reader.Read())
{
byte[] picbyte = reader["Photo"] as byte[] ?? null;
if (picbyte != null)
{
MemoryStream mstream = new MemoryStream(picbyte);
pictureBoxForImage.Image = System.Drawing.Image.FromStream(mstream);
{
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(mstream);
}
}
HERE IS A TOTAL ANOTHER WAY TO DO SO:
You can simply convert the Image to Text before saving it into DataBase and the then convert it back to the Image after reading it:
public string ImageToStringFucntion(Image img)
{
try
{
using (MemoryStream ms = new MemoryStream())
{
img.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
byte[] imgBytes = ms.ToArray();
string FinalText = Convert.ToBase64String(imgBytes, 0 , imgBytes.Length);
return FinalText;
}
}
catch
{
return null;
}
}
Now you can Insert or Update your Database...
Now Let's consider you want it back:
public Image StringToImage_(string input_)
{
try
{
byte[] imgBytes = Convert.FromBase64String(input_);
using (MemoryStream ms = new MemoryStream(imgBytes))
{
Image img = Image.FromStream(ms, true);
return img;
}
}
catch (Exception ex)
{
return null;
}
}
Now you can do as follow:
// Considering you have already pulled your data
// from database and set it in a DataSet called 'ds',
// and you picture is on the field number [1] of your DataRow
pictureBox1.Image = StringToImage_(ds.Table[0].Rows[0][1].ToString());
I am trying to display an image in an WPF Image container
string imageContent = ((DataRowView)dgQuestions.SelectedItem)["QuestionImage"].ToString();
if (imageContent.Length >= 5)
{
byte[] data = (byte[])((DataRowView)dgQuestions.SelectedItem)["QuestionImage"];
ImageSourceConverter imgConv = new ImageSourceConverter();
imageSource = (ImageSource)imgConv.ConvertFromString(data.ToString());
}
The last line of the above code generates the following error
object reference not set to an instance of an object
I'm not bothered with how the datagrid displays the image as the user will never see the it.
This is how I am filling the grid:
SqlCommand cmd = new SqlCommand();
cmd.Connection = Con;
cmd.CommandText = "getQuizQuestions";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add(new SqlParameter("#quizid", SqlDbType.Int)).Value = quizId;
cmd.ExecuteNonQuery();
SqlDataAdapter daSubject = new SqlDataAdapter(cmd);
DataSet dsSubject = new DataSet();
daSubject.Fill(dsSubject, "QuizSubject");
dgQuestions.ItemsSource = dsSubject.Tables[0].DefaultView;
Set a breakpoint and validate data isn't null. Also, why don't you set the image source as the byte[] instead of using a ToString():
public BitmapImage ImageFromBuffer(Byte[] bytes)
{
MemoryStream stream = new MemoryStream(bytes);
BitmapImage image = new BitmapImage();
image.BeginInit();
image.StreamSource = stream;
image.EndInit();
return image;
}
public Byte[] BufferFromImage(BitmapImage imageSource)
{
Stream stream = imageSource.StreamSource;
Byte[] buffer = null;
if (stream != null && stream.Length > 0)
{
using (BinaryReader br = new BinaryReader(stream))
{
buffer = br.ReadBytes((Int32)stream.Length);
}
}
return buffer;
}
I have binary data of an image in my database, and I want to display it in an image control in ASP.NET. How? If it is impossible, please find another way to save it in the database and display it in an image control.
Create a regular HTML img element like so:
<img runat="server" id="image" />
And in code behind do this:
image.src = "data:image/png;base64," + Convert.ToBase64String(imageBytes);
Where imageBytes is a byte[].
You are done. The image will be displayed.
Most likely the image is being stored as a byte array in the database. If so, then you can use this:
public static System.Drawing.Image ByteArrayToImage(byte[] bArray)
{
if (bArray == null)
return null;
System.Drawing.Image newImage;
try
{
using (MemoryStream ms = new MemoryStream(bArray, 0, bArray.Length))
{
ms.Write(bArray, 0, bArray.Length);
newImage = System.Drawing.Image.FromStream(ms, true);
}
}
catch (Exception ex)
{
newImage = null;
//Log an error here
}
return newImage;
}
public Byte[] Ret_image(Int32 id)
{
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "select * from tbimage where imageid=#id";
cmd.Connection = con;
cmd.Parameters.Add("#id", SqlDbType.Int).Value = id;
SqlDataReader dr = cmd.ExecuteReader();
dr.Read();
Byte[] ar = (Byte[])(dr[1]);
dr.Close();
cmd.Dispose();
return ar;
}
protected void Button2_Click(object sender, EventArgs e)
{
Byte[] ar = Ret_image(Convert.ToInt32(TextBox2.Text));
String st = Server.MapPath("abc.jpg");
FileStream fs = new FileStream(st, FileMode.Create, FileAccess.Write);
fs.Write(ar, 0, ar.Length);
fs.Close();
Image1.ImageUrl = "abc.jpg";
}
Use this event for the button click to retrieve image and call the Ret_Image method here.
In a generic handler (.ashx):
public class ImageHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
if(!string.IsNullOrEmpty(context.Request.QueryString["ImageId"]))
{
try
{
string ImageId = context.Request.QueryString["ImageId"].ToString();
ImageDataModel idm = new ImageDataModel();
byte[] ImageData = idm.getImageData(ImageId);
context.Response.ContentType = "image/JPEG";
context.Response.OutputStream.Write(ImageData, 0, ImageData.Length);
}
catch(Exception ex){}
}
}
}
SqlConnection con = new SqlConnection();
string _path;
Using SYstem.IO;
Using System.Data.SQLClient;
//convert Image to binary and save in DB
private void button1_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
_path = openFileDialog1.FileName;
InsertInSQL(_path);
}
}
private void InsertInSQL(string _path)
{
con.ConnectionString = Pic.Properties.Settings.Default.ConnectionS;
string strQ = "insert into dbo.PicTBL(Pic)values(#p)";
SqlCommand command = new SqlCommand(strQ,con);
command.Parameters.AddWithValue("#p",ImageToBinary(_path));
con.Open();
command.ExecuteNonQuery();
con.Close();
}
public static byte[] ImageToBinary(string _path)
{
FileStream fS = new FileStream(_path, FileMode.Open, FileAccess.Read);
byte[] b = new byte[fS.Length];
fS.Read(b, 0, (int)fS.Length);
fS.Close();
return b;
}
//Convert Binary to imge and save in a folder
private void button1_Click_1(object sender, EventArgs e)
{
DataTable dt = Rimage();
foreach (DataRow row in dt.Rows)
{
byte[] b = (byte[])row["Pic"];
Image img = BinaryToImage(b);
img.Save("D:\\NewFolder\\" + row["ID"].ToString() + ".jpg");
}
}
private Image BinaryToImage(byte[] b)
{
if (b == null)
return null;
MemoryStream memStream = new MemoryStream();
memStream.Write(b, 0, b.Length);
return Image.FromStream(memStream);
}
private DataTable Rimage()
{
con.ConnectionString = Pic.Properties.Settings.Default.ConnectionS;
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "select * from dbo.PicTBL";
cmd.Connection = con;
SqlDataAdapter adp = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
con.Open();
adp.Fill(dt);
return dt;
}