/// <summary>
/// 文件上传
/// </summary>
/// <param name="UploadFile">文件上传控件</param>
/// <returns>返回是否成功保存图片</returns>
public bool UpLoadFile(HttpPostedFile UploadFile)
{
try
{
if (UploadFile != null)//检查是否已经选择文件
{
string filename = UploadFile.FileName.ToLower();
TFileName = filename;
int i = filename.LastIndexOf(".");
filename = filename.Substring(i, filename.Length - i);
//格式化日期作为文件名
string oStringTime = ObjectFormatUtil.GetNumByDateTime(4);
string PathName = ObjectFormatUtil.GetNumByDateTime(0);
OFileName = PathName + filename;
string oSavePath = HttpContext.Current.Server.MapPath("~") + "\\" + Path + "\\" + oStringTime + "\\";
if (!Directory.Exists(oSavePath))
{
Directory.CreateDirectory(oSavePath);//在根目录下建立文件夹
}
if (OldName != "")
{
string full_name = HttpContext.Current.Server.MapPath("~" + OldName);
if (File.Exists(full_name))
{
File.Delete(full_name);
}
}
//保存路径+完整文件名
OFullName = oSavePath + OFileName;
FileName = url + "/" + Path + "/" + oStringTime + "/" + OFileName;
UploadFile.SaveAs(OFullName);
MSG = "图片文件成功!";
return(true);
}
else
{
MSG = "";
return(true);
}
}
catch (Exception ex)
{
MSG = "上传文件异常：" + ex.Message;
return(false);
}
}
/// <summary>
/// 图片上传(默认:"等比压缩,限定上传尺寸2048*1536,缩略图尺寸100*100,限定上传大小1MB,存放在根目录UpdateFile中")
/// </summary>
/// <param name="UploadFile">文件上传控件</param>
/// <returns>返回是否成功保存图片</returns>
public bool UpLoadIMG(HttpPostedFile UploadFile)
{
try
{
if (UploadFile != null)//检查是否已经选择文件
{
string filename = UploadFile.FileName.ToLower();
int i = filename.LastIndexOf(".");
filename = filename.Substring(i, filename.Length - i);
if (!(filename == ".jpg" || filename == ".jpeg" || filename == ".gif" || filename == ".png" || filename == ".bmp"))
{
UpLoadFile(UploadFile);
return(true);
}
//检查上传文件的格式是否有效
//if (UploadFile.ContentLength == 0 || UploadFile.ContentLength >= Size)
//{
// MSG = "指定的文件大小不符合要求,限定上传大小1MB!";
// return false;
//}
//检查图片文件的大小
//生成原图
Stream oStream = UploadFile.InputStream;
System.Drawing.Image oImage = System.Drawing.Image.FromStream(oStream);
int owidth = oImage.Width; //原图宽度
int oheight = oImage.Height; //原图高度
//if (owidth > LimitWidth || oheight > LimitHeight)
//{
// MSG = "超过允许的图片尺寸范围,限定上传尺寸" + LimitWidth + "*" + LimitHeight + "!";
// return false;
//}
//检查是否超出规定尺寸
if (IsRate)
{
//按比例计算出缩略图的宽度和高度
if (owidth >= oheight)
{
THeight = (int)Math.Floor(Convert.ToDouble(oheight) * (Convert.ToDouble(TWidth) / Convert.ToDouble(owidth)));//等比设定高度
}
else
{
TWidth = (int)Math.Floor(Convert.ToDouble(owidth) * (Convert.ToDouble(THeight) / Convert.ToDouble(oheight)));//等比设定宽度
}
}
//生成缩略原图
Bitmap tImage = new Bitmap(TWidth, THeight);
Graphics g = Graphics.FromImage(tImage);
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; //设置高质量插值法
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //设置高质量,低速度呈现平滑程度
g.Clear(Color.Transparent); //清空画布并以透明背景色填充
g.DrawImage(oImage, new Rectangle(0, 0, TWidth, THeight), new Rectangle(0, 0, owidth, oheight), GraphicsUnit.Pixel);
//格式化日期作为文件名
string oStringTime = ObjectFormatUtil.GetNumByDateTime(4);
string PathName = ObjectFormatUtil.GetNumByDateTime(0);
OFileName = PathName + filename;
TFileName = PathName + filename.Replace(".", "_t.");
string oSavePath = HttpContext.Current.Server.MapPath("~") + "\\" + Path + "\\" + oStringTime + "\\";
if (!Directory.Exists(oSavePath))
{
Directory.CreateDirectory(oSavePath);//在根目录下建立文件夹
}
if (OldName != "")
{
string full_name = HttpContext.Current.Server.MapPath("~" + OldName);
if (File.Exists(full_name))
{
File.Delete(full_name);
}
full_name = HttpContext.Current.Server.MapPath("~" + OldName.Replace(".", "_t."));
if (File.Exists(full_name))
{
File.Delete(full_name);
}
}
//保存路径+完整文件名
OFullName = oSavePath + OFileName;
TFullName = oSavePath + TFileName;
FileName = url + "/" + Path + "/" + oStringTime + "/" + OFileName;
//开始保存图片至服务器
try
{
switch (filename)
{
case ".jpeg":
case ".jpg":
{
oImage.Save(OFullName, System.Drawing.Imaging.ImageFormat.Jpeg);
tImage.Save(TFullName, System.Drawing.Imaging.ImageFormat.Jpeg);
break;
}
case ".gif":
{
oImage.Save(OFullName, System.Drawing.Imaging.ImageFormat.Gif);
tImage.Save(TFullName, System.Drawing.Imaging.ImageFormat.Gif);
break;
}
case ".png":
{
oImage.Save(OFullName, System.Drawing.Imaging.ImageFormat.Png);
tImage.Save(TFullName, System.Drawing.Imaging.ImageFormat.Png);
break;
}
case ".bmp":
{
oImage.Save(OFullName, System.Drawing.Imaging.ImageFormat.Bmp);
tImage.Save(TFullName, System.Drawing.Imaging.ImageFormat.Bmp);
break;
}
}
MSG = "图片上传成功!";
return(true);
}
catch (Exception ex)
{
MSG = ex.Message;
return(false);
}
finally
{
//释放资源
oImage.Dispose();
g.Dispose();
tImage.Dispose();
}
}
else
{
MSG = "";
return(true);
}
}
catch (Exception ex)
{
MSG = "上传图片异常：" + ex.Message;
return(false);
}
}
