我是一名使用C＃Winforms在GUI上工作的学生，用户可以在其上加载图像，在其上绘画，然后将编辑后的图像保存到他的系统中。
Bitmap b = new Bitmap(imgList);
image.DrawImage(b, new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.DrawImage(btm, Point.Empty);
我的问题是，当我从图片框中保存已编辑的图像时，它的质量会降低，并且它的高度与图片框的高度相同。我已在下面提供了我的Form.cs以供参考。有什么办法可以让编辑过的图像保持原始图像的图像质量吗？
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.IO;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace SIP_UI
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
imagelst = new ImageList();
}
//Declared Variables
private Graphics g;
private Graphics image;
private Bitmap btm;
private SolidBrush c;
private bool drawing = false;
private ImageList imagelst;
private string[] imglst;
private int imgCnt = 1;
private bool saveNxtWasClicked = false;
private bool savePrevWasClicked = false;
private void Form1_Load(object sender, EventArgs e)
{
g = pictureBox1.CreateGraphics();
btm = new Bitmap(pictureBox1.Width, pictureBox1.Height);
image = Graphics.FromImage(btm);
image.Clear(Color.White);
//Status color on default load
pnlStatus.BackColor = Color.DarkGray;
chkbxImageInfo.Checked = false;
if (chkbxImageInfo.Checked == false)
{
txtTestRep.Enabled = false;
txtBoard.Enabled = false;
cmbxPosition.Enabled = false;
}
btnNext.Enabled = true;
btnPrev.Enabled = false;
txtImgNum.Text = "0";
lblTotl.Text = "#";
using (StreamReader streamReaderOpen = new StreamReader("OpenLocation.txt"))
{
string strOpen = streamReaderOpen.ReadLine();
//Check path validity
if (System.IO.Directory.Exists(strOpen))
{
txtOpnPath.Text = strOpen;
}
else
{
txtOpnPath.Text = Environment.GetFolderPath(Environment.SpecialFolder.MyPictures);
}
}
using (StreamReader streamReaderSave = new StreamReader("SaveLocation.txt"))
{
string strSave = streamReaderSave.ReadLine();
//Check path validity
if (System.IO.Directory.Exists(strSave))
{
txtSavPath.Text = strSave;
}
else
{
txtSavPath.Text = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
}
}
using (StreamReader streamReaderCsv = new StreamReader("CsvLocation.txt"))
{
string strCsv = streamReaderCsv.ReadLine();
//Check path validity
if (System.IO.Directory.Exists(strCsv))
{
txtCsvPath.Text = strCsv;
}
else
{
txtCsvPath.Text = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
}
}
//Open images from previous folder
if (txtOpnPath.Text.Length > 0)
{
int i = 0;
int numImgs = Directory.GetFiles(txtOpnPath.Text, "*.PNG").Length;
imglst = new string[numImgs];
lblTotl.Text = Convert.ToString(numImgs);
txtImgNum.Text = Convert.ToString(1);
//foreach (var file in Directory.GetFiles(txtOpnPath.Text).Where(f => extensions.Contains(Path.GetExtension(f).ToUpper())))
foreach (var file in Directory.GetFiles(txtOpnPath.Text, "*.PNG"))
{
imglst[i++] = file;
}
if (imglst.Length > 0)
{
drawImage(imglst[0]);
//Added new
bool exist = Directory.EnumerateFiles(txtSavPath.Text, Path.GetFileNameWithoutExtension(imglst[0]) + "_MSKD*").Any();
if (exist)
{
pnlStatus.BackColor = Color.Red;
}
else
{
pnlStatus.BackColor = Color.Green;
}
}
else
{
MessageBox.Show("SELECT ANOTHER LOCATION", "NO SUPPORTED IMAGES FOUND", MessageBoxButtons.OK);
txtImgNum.Text = "0";
}
}
}
//Function to draw image into picturebox
private void drawImage(string imgList)
{
Bitmap b = new Bitmap(imgList);
image.DrawImage(b, new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.DrawImage(btm, Point.Empty);
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
drawing = false;
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
drawing = true;
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (drawing)
{
c = new SolidBrush(Color.Gray);
image.FillEllipse(c, e.X - (trackBar1.Value / 2), e.Y - (trackBar1.Value / 2), (trackBar1.Value * 15), (trackBar1.Value * 15));
g.DrawImage(btm, Point.Empty);
}
}
private void btnOpen_Click(object sender, EventArgs e)
{
btnNext.Enabled = true;
lblTotl.Text = "#";
var fd = new System.Windows.Forms.FolderBrowserDialog();
if (fd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
int i = 0;
txtOpnPath.Text = fd.SelectedPath;
int numImgs = Directory.GetFiles(txtOpnPath.Text, "*.PNG").Length;
imglst = new string[numImgs];
lblTotl.Text = Convert.ToString(numImgs);
foreach (var file in Directory.GetFiles(txtOpnPath.Text, "*.PNG"))
{
imglst[i++] = file;
}
if (imglst.Length > 0)
{
drawImage(imglst[0]);
txtImgNum.Text = "1";
//Added new
bool exist = Directory.EnumerateFiles(txtSavPath.Text, Path.GetFileNameWithoutExtension(imglst[0]) + "_MSKD*").Any();
if (exist)
{
pnlStatus.BackColor = Color.Red;
}
else
{
pnlStatus.BackColor = Color.Green;
}
}
else
{
MessageBox.Show("SELECT ANOTHER LOCATION", "NO SUPPORTED IMAGES FOUND", MessageBoxButtons.OK);
pictureBox1.Image = null;
txtImgNum.Text = "0";
}
using (StreamWriter streamWriter = new StreamWriter("OpenLocation.txt"))
{
streamWriter.WriteLine(txtOpnPath.Text);
}
}
}
private void btnSaveFdr_Click(object sender, EventArgs e)
{
var savFoldr = new System.Windows.Forms.FolderBrowserDialog();
if (savFoldr.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
txtSavPath.Text = savFoldr.SelectedPath;
using (StreamWriter streamWriter = new StreamWriter("SaveLocation.txt"))
{
streamWriter.WriteLine(txtSavPath.Text);
}
}
}
private void btnSave_Click(object sender, EventArgs e)
{
saveNxtWasClicked = true;
savePrevWasClicked = true;
int count = 1;
imgCnt = Convert.ToInt32(txtImgNum.Text);
string imgPath = imglst[imgCnt - 1];
string fileName = Path.GetFileNameWithoutExtension(imgPath) + "_MSKD";
string fileExtnsn = Path.GetExtension(imgPath);
string filePath = txtSavPath.Text + "\\" + fileName + fileExtnsn;
while (File.Exists(filePath))
{
string tempFileName = string.Format("{0}({1})", fileName, count++);
filePath = Path.Combine(txtSavPath.Text, tempFileName + fileExtnsn);
}
btm.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);
//Writing to CSV
string csvPath = txtCsvPath.Text + "\\CSVSpec.csv";
if (chkbxImageInfo.Checked == true)
{
if (File.Exists(csvPath))
{
// Initialise stream object with file
using (var wr = new StreamWriter(csvPath, true, Encoding.UTF8))
{
// Collection of image details
var row = new List<string>();
row.Add(Path.GetFileNameWithoutExtension(imgPath));
row.Add(txtTestRep.Text);
row.Add(txtBoard.Text);
row.Add(cmbxPosition.Text);
var sb = new StringBuilder();
foreach (string value in row)
{
// Add a comma before each string
if (sb.Length > 0)
{
sb.Append(",");
}
sb.Append(value);
}
wr.WriteLine(sb.ToString());
}
}
else
{
MessageBox.Show("Please add CSVSpec.csv file in specified location to save Image Information.", "MISSING: TEMPLATE FILE", MessageBoxButtons.OK);
}
}
else
{
}
DialogResult result = MessageBox.Show("IMAGE SAVED", "SAVE DIALOGUE", MessageBoxButtons.OK);
if (result == DialogResult.OK)
{
if (imgCnt != imglst.Length)
{
drawImage(imglst[imgCnt]);
imgCnt++;
txtImgNum.Text = Convert.ToString(imgCnt);
txtTestRep.Text = string.Empty;
txtBoard.Text = string.Empty;
cmbxPosition.SelectedIndex = 0;
saveNxtWasClicked = false;
}
else
{
btnNext.Enabled = false;
}
}
}
private void btnPrev_Click(object sender, EventArgs e)
{
int a = Convert.ToInt32(txtImgNum.Text);
btnNext.Enabled = true;
if (a > 1)
{
a = a - 2;
drawImage(imglst[a]);
txtImgNum.Text = Convert.ToString(a + 1);
txtTestRep.Text = string.Empty;
txtBoard.Text = string.Empty;
cmbxPosition.SelectedIndex = 0;
bool exist = Directory.EnumerateFiles(txtSavPath.Text, Path.GetFileNameWithoutExtension(imglst[a]) + "_MSKD*").Any();
if (exist)
{
pnlStatus.BackColor = Color.Red;
}
else
{
pnlStatus.BackColor = Color.Green;
}
}
else
{
btnPrev.Enabled = false;
}
}
private void btnNext_Click(object sender, EventArgs e)
{
int a = Convert.ToInt32(txtImgNum.Text);
btnPrev.Enabled = true;
if (imglst != null && a < imglst.Length)
{
drawImage(imglst[a++]);
txtImgNum.Text = Convert.ToString(a);
txtTestRep.Text = string.Empty;
txtBoard.Text = string.Empty;
cmbxPosition.SelectedIndex = 0;
bool exist = Directory.EnumerateFiles(txtSavPath.Text, Path.GetFileNameWithoutExtension(imglst[a - 1]) + "_MSKD*").Any();
if (exist)
{
pnlStatus.BackColor = Color.Red;
}
else
{
pnlStatus.BackColor = Color.Green;
}
}
else
{
btnNext.Enabled = false;
}
}
private void txtImgNum_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == (char)13)
{
int imgNum = Convert.ToInt32(txtImgNum.Text) - 1;
drawImage(imglst[imgNum]);
}
}
private void chkbxImageInfo_CheckedChanged(object sender, EventArgs e)
{
if (chkbxImageInfo.Checked)
{
txtTestRep.Enabled = true;
txtBoard.Enabled = true;
cmbxPosition.Enabled = true;
}
else
{
txtTestRep.Enabled = false;
txtBoard.Enabled = false;
cmbxPosition.Enabled = false;
}
}
private void btnClear_Click(object sender, EventArgs e)
{
int imgNum = Convert.ToInt32(txtImgNum.Text) - 1;
drawImage(imglst[imgNum]);
}
private void btnCsv_Click(object sender, EventArgs e)
{
var csvFoldr = new System.Windows.Forms.FolderBrowserDialog();
if (csvFoldr.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
txtCsvPath.Text = csvFoldr.SelectedPath;
using (StreamWriter streamWriter = new StreamWriter("CsvLocation.txt"))
{
streamWriter.WriteLine(txtCsvPath.Text);
}
}
}
}
}