问题
I'm trying to load image from my .mdb database in WPF. I'm using this code :
public void loadimg()
{
con.Open();
OleDbCommand cmd = new OleDbCommand("Select * from recents", con);
DataTable table = new DataTable;
OleDbDataAdapter adap = new OleDbDataAdapter(cmd);
adap.Fill(table);
if (table.Rows.Count <= 0)
{
MsgBox("nooo");
}
else
{
MemoryStream stream = new MemoryStream();
StreamWriter stm;
BinaryWriter writer = new BinaryWriter(stream);
int bufferSize = 100;
byte[] outByte = new byte[bufferSize + 1];
long retval;
long startIndex = 0;
string pubID = "";
OleDbDataReader reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);
reader.Read();
while (reader.Read())
{
startIndex = 0;
retval = reader.GetBytes(1, startIndex, outByte, 0, bufferSize);
while (retval == bufferSize)
{
writer.Write(outByte);
writer.Flush();
startIndex += bufferSize;
retval = reader.GetBytes(1, startIndex, outByte, 0, bufferSize);
}
writer.Write(outByte, 0, (int)retval - 1);
writer.Flush();
}
reader.Close();
con.Close();
stream.Position = 0;
stream.Seek(0, SeekOrigin.Begin);
System.Drawing.Image _Image = System.Drawing.Image.FromStream(stream);
image1.Source = System.Windows.Media.Imaging.BitmapFrame.Create(stream);
}
}
The code above returns an error :
No imaging component suitable to complete this operation was found.
I spent hours trying to figure out how to fix it.Any help would be highly appreciated.
Update In the comments, i was asked if i inserted the data properly..Well,here's the code i used to insert the data :
public void adddata()
{
con.Open();
OleDbCommand cmd = new OleDbCommand("Insert into recents(Pic)values(@pic)", con);
byte[] data;
System.Drawing.Image myimage = System.Drawing.Image.FromFile("E:\\19686468_1419770068104721_1127495277_o.png");
using (MemoryStream ms = new MemoryStream())
{
myimage.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
data = ms.ToArray();
}
cmd.Parameters.AddWithValue("@pic", data);
cmd.ExecuteNonQuery();
con.Close();
}
Please help me out!
回答1:
Fixed it...For anyone who faces this error in future :
- Make sure you're inserting the data in the proper way(sometimes corrupted data in the db causes such errors)
2 . You don't need to do some heavy coding to convert the image to byte!
Finally,let's code :
public void loadimg()
{
con.Open();
OleDbCommand cmd = new OleDbCommand("Select * from recents", con);
OleDbDataReader _dr;
_dr = cmd.ExecuteReader;
byte[] _photo;
while (_dr.Read())
{
try
{
_photo = (byte[])_dr(1);
BitmapImage bi = new BitmapImage();
using (MemoryStream strm = new MemoryStream(_photo))
{
bi.BeginInit();
bi.CacheOption = BitmapCacheOption.OnLoad;
bi.StreamSource = strm;
bi.EndInit();
}
image1.Source = bi;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
来源:https://stackoverflow.com/questions/48968100/no-imaging-component-suitable-to-complete-this-operation-was-found-wpf-c-sharp