摘要：
//////修改指定图片的分辨率////////文件夹url//文件名//文件路径，文件名//分辨率宽度/˂pa
- /// <summary>
- /// 修改指定图片的分辨率
- /// </summary>
- /// <param name="fileFoldUrl">文件夹url</param>
- /// <param name="fileName">文件名</param>
- /// <param name="filePath">文件路径，带文件名</param>
- /// <param name="_width">分辨率的宽</param>
- /// <param name="_height">分辨率的高</param>
- public void update_picture(string fileFoldUrl, string fileName, string filePath, int _width, int _height)
- {
- byte[] zp = this.load_pictMemory(filePath);
- MemoryStream ms = new MemoryStream(zp);
- System.Drawing.Image img = System.Drawing.Image.FromStream(ms);
- Bitmap btp = new Bitmap(img, _width, _height);
- DirectoryInfo dti = new DirectoryInfo(fileFoldUrl);
- FileInfo[] fis = dti.GetFiles();
- string fileUrl = fileFoldUrl + fileName;
- btp.Save(fileUrl);
- }
- /// <summary>
- /// 获取指定文件流的字节大小
- /// </summary>
- /// <param name="filePath">文件路径</param>
- /// <returns>byte[]</returns>
- public byte[] load_pictMemory(string filePath)
- {
- byte[] pictData = null;
- FileInfo fi = new FileInfo (filePath);
- if (fi.Exists)
- {
- pictData = new byte[fi.Length];
- FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.ReadWrite);
- BinaryReader br = new BinaryReader(fs);
- br.Read(pictData, 0, Convert.ToInt32(fi.Length));
- fs.Dispose();
- }
- else
- {
- HttpContext.Current.Response.Write("<script language='javascript'>alert('没有找到你所指定的图片')</script>");
- }
- return pictData;
- }