C# WPF Show Bitmap To Canvas

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Hi I Working On WPF Project And Need To Show Image From Sqlite In Canvas.

C#

Int32 i = 1;
                if (i > 0)
                {
                    DataRow dataRow = helper.DataSet.Tables[0].Rows[i - 1];
                    //Get Bytes From DataBase
                    byte[] imageBytes = (byte[])dataRow[8];
                    MemoryStream ms = new MemoryStream(imageBytes);

                    System.Drawing.Bitmap bmap = new System.Drawing.Bitmap(ms);
                    
                    IntPtr hBitmap = bmap.GetHbitmap();
                    Image MyImg = New Image();
                    //Convert Bitmap To Image
                    MyImg.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                   
    
                    mycanvas.Children.Clear();
                    RemoveLogicalChild(MyImg);
                    mycanvas.Children.Add(MyImg);

But At mycanvas.Children.Add(MyImg)I Get Error "Specified element is already the logical child of another element. Disconnect it first."

Can Anyone Tell Me How I Can Fix This Problem?

Regards

Posted 24-Jun-14 2:21am

pertican2010

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Raul Iloc 24-Jun-14 8:45am

Could you show us also the code of your method "RemoveLogicalChild()", because maybe the problem is generated from this method!

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Balav4 · Answer 1 · 2014-06-24T20:41:00

Hi Try this

C#

MemoryStream Ms = new MemoryStream();
System.Drawing.Bitmap ObjBitmap = null;
ObjBitmap = //Load your Image;
ObjBitmap.Save(Ms, System.Drawing.Imaging.ImageFormat.Bmp);
Ms.Position = 0;
BitmapImage ObjBitmapImage = new BitmapImage();
ObjBitmapImage.BeginInit();
ObjBitmapImage.StreamSource = Ms;
ObjBitmapImage.EndInit();
ImageControl.Source = ObjBitmapImage;
</pre>

pertican2010 · Answer 2 · 2014-06-24T05:17:00

Here Is My Codes I Get Image Byte Array From My DataBase And Convert It To Bitmap And When I Want Show It On Canvas I get This Error

Is There Other Way To I Convert Bitmap To Image And Show It In Canvas Box?

C#

private void comboBox1_SelectionChanged(object sender,SelectionChangedEventArgs e)
        { 
            selected_table_name = comboBox1.SelectedItem.ToString();
            string connectionString = "Data Source=C:\\Gallery\\Appdb.sqlite";

            // Determin the DataAdapter = CommandText + Connection
            string commandText = @"SELECT * FROM " + selected_table_name + " ORDER BY ID";

            // Make a new object
            helper = new dBHelper(connectionString);

            // Load the data
            if (helper.Load(commandText, "") == true)
            {
                // Show the data in the datagridview
                dataGridViewImageList.ItemsSource = helper.DataSet.Tables[0].DefaultView;
                //System.Windows.Visibility.Visible
                dataGridViewImageList.Columns[8].Visibility = System.Windows.Visibility.Collapsed;
                dataGridViewImageList.Columns[6].Visibility = System.Windows.Visibility.Collapsed;
                Int32 i = 1;
                if (i > 0)
                {
                    DataRow dataRow = helper.DataSet.Tables[0].Rows[i - 1];
                    //Get Bytes From DataBase
                    byte[] imageBytes = (byte[])dataRow[8];
                    MemoryStream ms = new MemoryStream(imageBytes);

                    System.Drawing.Bitmap bmap = new System.Drawing.Bitmap(ms);
                    
                    IntPtr hBitmap = bmap.GetHbitmap();
                    //Convert Bitmap To Image
                    MyImg.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());
                   
    
                    mycanvas.Children.Clear();
                    RemoveLogicalChild(MyImg);
                    mycanvas.Children.Add(MyImg);
                    
                }
               
            }
       
        }

Regards

C# WPF Show Bitmap To Canvas

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