上传图片

￡神魔★判官ぃ 2021-09-30 09:54 690阅读 0赞

$(".btn\_upimg").change(function () \{  
var $img = $(this).prev();  
console.log($(this).prop('files'))  
if ($(this).prop('files').length === 0) \{  
alert("请选择图片");  
return;  
\}  
var oFile = $(this).prop('files')\[0\];  
if (!new RegExp("(jpg|jpeg|png)+", "gi").test(oFile.type)) \{  
alert("照片上传：文件类型必须是JPG、JPEG、PNG");  
return;  
\}  
var reader = new FileReader();  
reader.onload = function (e) \{  
var base64Img = e.target.result;  
//压缩前预览  
console.log(base64Img)  
$img.attr("src", base64Img);  
$.post("/LotteryDraw/uploadImg", \{ img: base64Img \}, function (data) \{  
var obj = eval('(' + data + ')')  
if (obj.Error\_code ==="I2001") \{  
$img.attr("success\_src", obj.Data.img\_stc);  
$img.next().next().hide();  
\} else \{  
$img.next().next().show();  
\}  
console.log(obj);  
  
\})

\};  
reader.readAsDataURL(oFile);  
\})

public string uploadImg(string img) \{  
//string imgsrc = UpImg(img);  
Pacific.PoubtsShop.Common.ResultJsonInfo<imgJson> s = new PoubtsShop.Common.ResultJsonInfo<imgJson>();  
imgJson imgsrc = new imgJson();  
imgsrc.img\_stc = UpImg(img);  
s.Status = 0;  
  
if (imgsrc.img\_stc=="")  
\{  
s.Msg = "图片上传失败!";  
s.Error\_code = "I4001";  
\}  
else  
\{  
s.Msg = "图片上传成功!";  
s.Error\_code = "I2001";  
\}  
s.Data = imgsrc;

return JsonConvert.SerializeObject(s);  
\}

public class imgJson \{  
public string img\_stc \{ get; set; \}  
\}

/// <summary>  
/// 图片上传保存  
/// </summary>  
/// <param name="strbase64"></param>  
/// <returns></returns>  
public string UpImg(string strbase64)  
\{  
try  
\{  
string imgType = strbase64.Split(';')\[0\];  
imgType = imgType.Split('/')\[1\];  
strbase64 = strbase64.Split(',')\[1\];  
byte\[\] arr = Convert.FromBase64String(strbase64);  
MemoryStream ms = new MemoryStream(arr);  
Bitmap bmp = new Bitmap(ms);  
string path = "\\\\upload\\\\img\\\\";  
string tmpRootDir = System.Web.HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath.ToString());//获取程序根目录  
string imageUrl = tmpRootDir + path.Replace(@"/", @"\\"); //转换成绝对路径  
string imageName = "";  
if (imgType.ToLower() == "png")  
\{  
imageName = DateTime.Now.ToString("yyyyMMddHHmmss\_ffff", DateTimeFormatInfo.InvariantInfo) + ".png";  
bmp.Save(imageUrl + imageName, ImageFormat.Png);  
\}  
else if (imgType.ToLower() == "gif")  
\{  
imageName = DateTime.Now.ToString("yyyyMMddHHmmss\_ffff", DateTimeFormatInfo.InvariantInfo) + ".gif";  
bmp.Save(imageUrl + imageName, ImageFormat.Gif);  
\}  
else if (imgType.ToLower() == "bmp")  
\{  
imageName = DateTime.Now.ToString("yyyyMMddHHmmss\_ffff", DateTimeFormatInfo.InvariantInfo) + ".bmp";  
bmp.Save(imageUrl + imageName, ImageFormat.Bmp);  
\}  
else if (imgType.ToLower() == "jpeg")  
\{  
imageName = DateTime.Now.ToString("yyyyMMddHHmmss\_ffff", DateTimeFormatInfo.InvariantInfo) + ".jpg";  
bmp.Save(imageUrl + imageName, System.Drawing.Imaging.ImageFormat.Jpeg);  
\}  
//bmp.Save(imageUrl+"test.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);  
//bmp.Save("test.bmp", ImageFormat.Bmp);  
//bmp.Save("test.gif", ImageFormat.Gif);

ms.Close();  
return "/upload/img/" + imageName;  
// Context.Response.Write("\{\\"status\\":1,\\"message\\":\\"" + bmp + "\\"\}");

\}  
catch (Exception e)  
\{  
return "";  
//Context.Response.Write("\{\\"status\\":1,\\"message\\":\\"操作错误!\\"\}");  
\}  
\}

转载于:https://www.cnblogs.com/ztf20/p/9886093.html