Diskuze: Uložení obrázku C#
V předchozím kvízu, Test znalostí C# .NET online, jsme si ověřili nabyté zkušenosti z kurzu.
Člen
ORRNY99:2.7.2016 13:50
Zkus tohle:
public void ExportToBmp(string path)
{
using(var bitmap = new Bitmap(pictureBox.Width, pictureBox.Height))
{
pictureBox.DrawToBitmap(bitmap, pictureBox.ClientRectangle);
ImageFormat imageFormat = null;
var extension = Path.GetExtension(path);
switch (extension)
{
case ".bmp":
imageFormat = ImageFormat.Bmp;
break;
case ".png":
imageFormat = ImageFormat.Png;
break;
case ".jpeg":
case ".jpg":
imageFormat = ImageFormat.Jpeg;
break;
case ".gif":
imageFormat = ImageFormat.Gif;
break;
default:
throw new NotSupportedException("File extension is not supported");
}
bitmap.Save(path, imageFormat);
}
}nebo lehčí varianta:
pictureBox1.Image.Save(@"C:\Users\HP\Pictures\test.jpg",ImageFormat.Jpeg);
jzvire01:2.7.2016 14:38
Ani jedno nefunguje dávám sem celý kód:
Graphics g;
Point ep = new Point(0, 0);
Point sp = new Point(0, 0);
Pen myPen = new Pen(Color.Black, 5);
bool k = false;
TextBox txt = new TextBox();
Image File;
public Form1()
{
InitializeComponent();
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
sp = e.Location;
if (e.Button == MouseButtons.Left)
{
k = true;
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
k = false;
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (k == true)
{
ep = e.Location;
g = Image.CreateGraphics();
g.DrawLine(myPen, sp, ep);
}
sp = ep;
}
private void pictureBox9_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox9.BackColor;
pictureBox1.BackColor = pictureBox9.BackColor;
}
private void pictureBox10_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox10.BackColor;
pictureBox1.BackColor = pictureBox10.BackColor;
}
private void pictureBox6_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox6.BackColor;
pictureBox1.BackColor = pictureBox6.BackColor;
}
private void pictureBox7_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox7.BackColor;
pictureBox1.BackColor = pictureBox7.BackColor;
}
private void pictureBox8_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox8.BackColor;
pictureBox1.BackColor = pictureBox8.BackColor;
}
private void pictureBox5_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox5.BackColor;
pictureBox1.BackColor = pictureBox5.BackColor;
}
private void pictureBox4_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox4.BackColor;
pictureBox1.BackColor = pictureBox4.BackColor;
}
private void pictureBox3_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox3.BackColor;
pictureBox1.BackColor = pictureBox3.BackColor;
}
private void pictureBox2_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox2.BackColor;
pictureBox1.BackColor = pictureBox2.BackColor;
}
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
myPen.Width = float.Parse(numericUpDown1.Value.ToString());
}
private void pictureBox13_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox13.BackColor;
pictureBox1.BackColor = pictureBox13.BackColor;
}
private void pictureBox11_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox11.BackColor;
pictureBox1.BackColor = pictureBox11.BackColor;
}
private void button1_Click(object sender, EventArgs e)
{
g.Clear(Color.White);
}
private void pictureBox16_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox16.BackColor;
pictureBox1.BackColor = pictureBox16.BackColor;
}
private void pictureBox15_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox15.BackColor;
pictureBox1.BackColor = pictureBox15.BackColor;
}
private void pictureBox14_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox14.BackColor;
pictureBox1.BackColor = pictureBox14.BackColor;
}
private void pictureBox12_Click(object sender, EventArgs e)
{
myPen.Color = pictureBox12.BackColor;
pictureBox1.BackColor = pictureBox12.BackColor;
}
private void button2_Click(object sender, EventArgs e)
{
ExportToBmp("soubor");
}
public void ExportToBmp(string path)
{
using (var bitmap = new Bitmap(Image.Width, Image.Height))
{
Image.DrawToBitmap(bitmap, Image.ClientRectangle);
ImageFormat imageFormat = null;
var extension = Path.GetExtension(path);
switch (extension)
{
case ".bmp":
imageFormat = ImageFormat.Bmp;
break;
case ".png":
imageFormat = ImageFormat.Png;
break;
case ".jpeg":
case ".jpg":
imageFormat = ImageFormat.Jpeg;
break;
case ".gif":
imageFormat = ImageFormat.Gif;
break;
default:
throw new NotSupportedException("File extension is not supported");
}
bitmap.Save(path, imageFormat);
}
}
Odpovídá na ORRNY99
jzvire01:2.7.2016 14:46
Editováno 2.7.2016 14:49
jzvire01:2.7.2016 14:46
Jde to, ale uloží to jenom bílou plochu
Odpovídá na jzvire01
Michael Škrášek:2.7.2016 14:52
Michael Škrášek:2.7.2016 14:52
Problém asi bude v tom, že kreslýš na Graphics, pictureBox1.Image vrací
obrázek pozadí, na kterém nic není.
Lepší způsob bude kreslit na obrázek a ten pak vykreslovat na picturebox
...
Udělal bych to nějak takto:
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
Graphics gr = Graphics.FromImage(bmp);
// kreslení na obrázek ...
e.Graphics.DrawImage(bmp, 0, 0);
}
private void Form1_Load(object sender, EventArgs e)
{
bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
}
private void Save(string path)
{
bmp.Save(path);
}
ORRNY99:2.7.2016 15:26
Editováno 2.7.2016 15:28
Zkus ještě tohle to by mělo už fungovat:
public static byte[] ImageToByte(Image img)
{
ImageConverter converter = new ImageConverter();
return (byte[])converter.ConvertTo(img, typeof(byte[]));
}
private void button2_Click(object sender, EventArgs e)
{
System.Drawing.Image currentImage = null;
var bin = (byte[]) (ImageToByte(AlbumArt.Image));
currentImage = Image.FromStream(new MemoryStream(bin));
using (Image image1 = Image.FromStream(new MemoryStream(bin)))
{
image1.Save("output.jpg", ImageFormat.Jpeg);
}
}
Odpovídá na jzvire01
Michael Škrášek:2.7.2016 15:34
Michael Škrášek:2.7.2016 15:34
Funguje to ... jen se to kreslí na černé pozadí ... přidej:
private void Form1_Load(object sender, EventArgs e)
{
bmp = new Bitmap(pictureBox1.Width, pictureBox1.Height);
Graphics gr = Graphics.FromImage(bmp);
gr.Clear(pictureBox1.BackColor);
}Děláme co je v našich silách, aby byly zdejší diskuze co nejkvalitnější. Proto do nich také mohou přispívat pouze registrovaní členové. Pro zapojení do diskuze se přihlas. Pokud ještě nemáš účet, zaregistruj se, je to zdarma.
Zobrazeno 10 zpráv z 10.