直播平台搭建,实现图片缩略图功能
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public Image ResourceImage;
private int ImageWidth;
private int ImageHeight;
public string ErrMessage;
public bool ThumbnailCallback()
{
return false;
}
public bool GetReducedImage(double Percent, string targetFilePath)
{
try
{
Bitmap bt = new Bitmap(120, 120);
Graphics g = Graphics.FromImage(bt);
g.Clear(Color.White);
Image ReducedImage;
Image.GetThumbnailImageAbort callb = new Image.GetThumbnailImageAbort(ThumbnailCallback);
ImageWidth = Convert.ToInt32(ResourceImage.Width * Percent);
ImageHeight = Convert.ToInt32(ResourceImage.Height * Percent);
ReducedImage = ResourceImage.GetThumbnailImage(ImageWidth, ImageHeight, callb, IntPtr.Zero);
if (ImageWidth > ImageHeight)
{
g.DrawImage(ReducedImage, 0, (int) (120 - ImageHeight) / 2, ImageWidth, ImageHeight);
}
else
{
g.DrawImage(ReducedImage, (int) (120 - ImageWidth) / 2, 0, ImageWidth, ImageHeight);
}
g.DrawRectangle(new Pen(Color.Gainsboro), 0, 0, 119, 119);
bt.Save(@targetFilePath, ImageFormat.Jpeg);
bt.Dispose();
ReducedImage.Dispose();
return true;
}
catch (Exception e)
{
ErrMessage = e.Message;
return false;
}
}
private void button1_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
pictureBox1.Image = Image.FromFile(openFileDialog1.FileName);
}
}
private void button2_Click(object sender, EventArgs e)
{
double percent;
string imgpath = openFileDialog1.FileName;
string imgName = imgpath.ToString().Substring(imgpath.ToString().LastIndexOf("\\") + 1,
imgpath.ToString().Length - 1 - imgpath.ToString().LastIndexOf("\\"));
imgName = imgName.Remove(imgName.LastIndexOf("."));
if (openFileDialog1.FileName.Length != 0)
{
ResourceImage = Image.FromFile(openFileDialog1.FileName);
if (ResourceImage.Width < ResourceImage.Height)
{
percent = (double) 120 / ResourceImage.Height;
}
else
{
percent = (double) 120 / ResourceImage.Width;
}
GetReducedImage(percent, "c:\\_" + imgName + ".JPG");
pictureBox2.Image = Image.FromFile("c:\\_" + imgName + ".JPG");
}
}
}
以上就是直播平台搭建,实现图片缩略图功能, 更多内容欢迎关注之后的文章
标签:ResourceImage,缩略图,Image,120,直播,ImageHeight,ImageWidth,public,搭建 From: https://www.cnblogs.com/yunbaomengnan/p/16975925.html