根據(jù)圖片相對(duì)路徑查找圖片并轉(zhuǎn)換為二進(jìn)制格式 /// <summary>/// 圖片轉(zhuǎn)換/// </summary>/// <param name="strPath"></param>/// <returns></returns>private byte[] reDyte(string strPath){byte[] bytes = null;try{FileStream fsMyfile = null;if (Directory.Exists(Server.MapPath(strPath))){// 以二進(jìn)制方式讀文件fsMyfile = new FileStream(Server.MapPath(strPath), FileMode.OpenOrCreate, FileAccess.ReadWrite);}else{fsMyfile = new FileStream(Server.MapPath(saveDir + "/default.jpg"), FileMode.OpenOrCreate, FileAccess.ReadWrite);} // 創(chuàng)建一個(gè)二進(jìn)制數(shù)據(jù)流讀入器，和打開(kāi)的文件關(guān)聯(lián)BinaryReader brMyfile = new BinaryReader(fsMyfile);// 把文件指針重新定位到文件的開(kāi)始brMyfile.BaseStream.Seek(0, SeekOrigin.Begin);bytes = brMyfile.ReadBytes(Convert.ToInt32(fsMyfile.Length.ToString()));// 關(guān)閉以上new的各個(gè)對(duì)象 brMyfile.Close();}catch {// 以二進(jìn)制方式讀文件FileStream fsMyfile = new FileStream(Server.MapPath(saveDir + "/default.jpg"), FileMode.OpenOrCreate, FileAccess.ReadWrite);// 創(chuàng)建一個(gè)二進(jìn)制數(shù)據(jù)流讀入器，和打開(kāi)的文件關(guān)聯(lián)BinaryReader brMyfile = new BinaryReader(fsMyfile);// 把文件指針重新定位到文件的開(kāi)始brMyfile.BaseStream.Seek(0, SeekOrigin.Begin);bytes = brMyfile.ReadBytes(Convert.ToInt32(fsMyfile.Length.ToString()));// 關(guān)閉以上new的各個(gè)對(duì)象 brMyfile.Close();}return bytes;} View Code

根據(jù)網(wǎng)絡(luò)路徑將圖片保存到本地

/// <summary>/// 保存url圖片到本地/// </summary>/// <param name="url"></param>/// <param name="savePath"></param>private string SaveUrlImage(string url){string savePath = "";try{HttpWebRequest webrequest = (HttpWebRequest)WebRequest.Create(url);HttpWebResponse webresponse = (HttpWebResponse)webrequest.GetResponse();if (webresponse.StatusCode == HttpStatusCode.OK){System.Drawing.Image image = System.Drawing.Image.FromStream(webresponse.GetResponseStream());savePath = saveDir + "/" + DateTime.Now.ToString("yyyyMMddHHmmssfffff") + ".jpg";image.Save(Server.MapPath(savePath)); //保存在本地文件夾image.Dispose(); //釋放資源 }}catch { }return savePath;} View Code

將二進(jìn)制格式圖片保存到本地

System.IO.MemoryStream ms = new System.IO.MemoryStream(imgData);System.Drawing.Image img = System.Drawing.Image.FromStream(ms);img.Save(savePath); View Code

檢查文件是否存在

Directory.Exists(severDir) View Code

?

參考資料：http://developer.51cto.com/art/200908/143612.htm

http://www.oschina.net/code/snippet_222150_15091

轉(zhuǎn)載于:https://www.cnblogs.com/Jokers/p/4425085.html

總結(jié)

以上是生活随笔為你收集整理的关于图片转换的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。

如果覺(jué)得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。