1 /// <summary>
2 /// 限制上传图片大小和格式
3 /// </summary>
4 /// <param name="url">图片路径</param>
5 /// <param name="width">图片宽度</param>
6 /// <param name="heigth">图片高度</param>
7 /// <param name="IsDel">是否删除图片</param>
8 protected bool LimitImageSize(string url,int width,int heigth,bool IsDel)
9 {
10 FileStream stream = new FileStream(Server.MapPath("./" + url), FileMode.Open, FileAccess.Read);
11 System.Drawing.Image tempimage = System.Drawing.Image.FromStream(stream, true);
12 string[] format = url.Split('.');
13 string fileext = format[3].ToString();
14 if (fileext.Equals("jpg") || fileext.Equals("JPG"))
15 {
16 int imagewidth = tempimage.Width;
17 int imageheight = tempimage.Height;
18 if (width >= imagewidth && heigth >= imagewidth)
19 {
20 stream.Close();
21 if (IsDel==true)
22 {
23 var ImageUrl = new FileInfo(Server.MapPath("./" + url));
24 ImageUrl.Delete();
25 }
26 Alert.ShowInTop("图片应大于或等于350*240px");
27 return true;
28 }
29 else
30 {
31 stream.Close();
32 return false;
33 }
34 }
35 else
36 {
37 stream.Close();
38 if (IsDel == true)
39 {
40 var ImageUrl = new FileInfo(Server.MapPath("./" + url));
41 ImageUrl.Delete();
42 }
43 Alert.ShowInTop("图片应为JPG格式");
44 return true;
45 }
46 }
