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protected string ImgToBase64String(string Imagefilename) { try { Bitmap bmp = new Bitmap(Imagefilename); MemoryStream ms = new MemoryStream(); bmp.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg); byte[] arr = new byte[ms.Length]; ms.Position = 0; ms.Read(arr, 0, (int)ms.Length); ms.Close(); return Convert.ToBase64String(arr); } catch (Exception ex) { return null; } } //threeebase64编码的字符串转为图片 protected Bitmap Base64StringToImage(string base64Code) { try { string sPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase; if (sPath.Substring(sPath.Length - 1, 1) != "\\") { sPath += "\\"; } if (!Directory.Exists(sPath + "Temp")) { Directory.CreateDirectory(sPath + "Temp"); } string sFileName = sPath + "Temp\\" + DateTime.Now.ToString("yyyyMMddHHmmssffff"); byte[] arr = Convert.FromBase64String(base64Code); MemoryStream ms = new MemoryStream(arr); Bitmap bmp = new Bitmap(ms); string f1 = sFileName + ".jpg"; string f2 = sFileName + ".bmp"; string f3 = sFileName + ".gif"; string f4 = sFileName + ".png"; bmp.Save(sFileName + ".jpg", ImageFormat.Jpeg); bmp.Save(sFileName + ".bmp", ImageFormat.Bmp); bmp.Save(sFileName + ".gif", ImageFormat.Gif); bmp.Save(sFileName + ".png", ImageFormat.Png); ms.Close(); #region 读取本地文件 FileStream fs = new FileStream(f1, FileMode.Open, FileAccess.Read); BinaryReader br = new BinaryReader(fs); byte[] photo = br.ReadBytes((int)fs.Length); br.Close(); fs.Close(); Copy(photo); #endregion return bmp; } catch (Exception ex) { Response.Write(ex.Message); return null; } } protected Bitmap Copy(byte[] arr) { try { string sPath = AppDomain.CurrentDomain.SetupInformation.ApplicationBase; if (sPath.Substring(sPath.Length - 1, 1) != "\\") { sPath += "\\"; } if (!Directory.Exists(sPath + "Temp\\Temp")) { Directory.CreateDirectory(sPath + "Temp\\Temp"); } string sFileName = sPath + "Temp\\Temp\\" + DateTime.Now.ToString("yyyyMMddHHmmssffff"); MemoryStream ms = new MemoryStream(arr); Bitmap bmp = new Bitmap(ms); string f1 = sFileName + ".jpg"; string f2 = sFileName + ".bmp"; string f3 = sFileName + ".gif"; string f4 = sFileName + ".png"; bmp.Save(sFileName + ".jpg", ImageFormat.Jpeg); bmp.Save(sFileName + ".bmp", ImageFormat.Bmp); bmp.Save(sFileName + ".gif", ImageFormat.Gif); bmp.Save(sFileName + ".png", ImageFormat.Png); ms.Close(); return bmp; } catch (Exception ex) { Response.Write(ex.Message); return null; } }
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