winForm_uploadImage
Upload Image File
private void simpleButton_import_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "图片文件(*.jpg;*.jpg;*.jpeg;*.gif;*.png)|*.jpg;*.jpeg;*.gif;*.png";
openFileDialog1.ShowDialog();
string filename = "";
string filepath = "";
if (DialogResult == DialogResult.None)
{
filepath = openFileDialog1.FileName;
filename = Path.GetFileName(filepath);
}
else
{
return;
}
if (filepath == "")
{
return;
}
FileInfo fileinfo = new FileInfo(filepath);
System.Drawing.Image image = System.Drawing.Image.FromFile(filepath);
DateTime now = System.DateTime.Now;
string dpath = fileinfo.DirectoryName + "\\" + now.Year.ToString()
+ (now.Month.ToString().Length == 1 ? "0" + now.Month.ToString() : now.Month.ToString())
+ (now.Day.ToString().Length == 1 ? "0" + now.Day.ToString() : now.Day.ToString())
+ (now.Hour.ToString().Length == 1 ? "0" + now.Hour.ToString() : now.Hour.ToString())
+ (now.Minute.ToString().Length == 1 ? "0" + now.Minute.ToString() : now.Minute.ToString())
+ (now.Second.ToString().Length == 1 ? "0" + now.Second.ToString() : now.Second.ToString())
+ ".jpg";
if (fileinfo.Length > 1 * 1024 * 1024)
{
GetPicThumbnail(filepath, dpath, image.Height, image.Width, 70);
filepath = dpath;
filename = Path.GetFileName(dpath);
}
str_picture += filename + ";";
byte [] bufferbyte = File.ReadAllBytes(filepath);
string strFolderPath = @"D:\Test_QC_PackagePicture_Import\";
DirectoryInfo di = new DirectoryInfo(strFolderPath);
try
{
File.Copy(filepath, di + @"\" + filename);
}
catch (Exception ex )
{
if (ex.Data.ToString() == "System.Collections.ListDictionaryInternal")
//MessageBox.Show("图片已存在!");
MessageBox.Show("Fail. Image already exist.");
throw;
}
MessageBox.Show("Image Update Successful.");
//MessageBox.Show("图片上传成功!");
}
/// <summary>
/// 无损压缩图片
/// </summary>
/// <param name="sFile">原图片地址</param>
/// <param name="dFile">压缩后保存图片地址</param>
/// <param name="flag">压缩质量(数字越小压缩率越高)1-100</param>
/// <param name="dHeight">压缩后图片的高度</param>
/// <param name="dWidth">压缩后图片的宽度</param>
/// <returns></returns>
public static bool GetPicThumbnail(string sFile, string dFile, int dHeight, int dWidth, int flag)
{
System.Drawing.Image iSource = System.Drawing.Image.FromFile(sFile);
ImageFormat tFormat = iSource.RawFormat;
int sW = 0, sH = 0;
//按比例缩放
Size tem_size = new Size(iSource.Width, iSource.Height);//原大小
if (tem_size.Width > dHeight || tem_size.Width > dWidth)
{
if ((tem_size.Width * dHeight) > (tem_size.Width * dWidth))
{
sW = dWidth;
sH = (dWidth * tem_size.Height) / tem_size.Width;
}
else
{
sH = dHeight;
sW = (tem_size.Width * dHeight) / tem_size.Height;
}
}
else
{
sW = tem_size.Width;
sH = tem_size.Height;
}
Bitmap ob = new Bitmap(dWidth, dHeight);
Graphics g = Graphics.FromImage(ob);
g.Clear(Color.WhiteSmoke);
g.CompositingQuality = CompositingQuality.HighQuality;
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(iSource, new Rectangle((dWidth - sW) / 2, (dHeight - sH) / 2, sW, sH), 0, 0, iSource.Width, iSource.Height, GraphicsUnit.Pixel);
g.Dispose();
//以下代码为保存图片时,设置压缩质量
EncoderParameters ep = new EncoderParameters();
long[] qy = new long[1];
qy[0] = flag;//设置压缩的比例1-100
EncoderParameter eParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qy);
ep.Param[0] = eParam;
try
{
ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo jpegICIinfo = null;
for (int x = 0; x < arrayICI.Length; x++)
{
if (arrayICI[x].FormatDescription.Equals("JPEG"))
{
jpegICIinfo = arrayICI[x];
break;
}
}
if (jpegICIinfo != null)
{
ob.Save(dFile, jpegICIinfo, ep);//dFile是压缩后的新路径
}
else
{
ob.Save(dFile, tFormat);
}
return true;
}
catch
{
return false;
}
finally
{
iSource.Dispose();
ob.Dispose();
}
}