/// <summary>
/// 上传附件
/// </summary>
/// <param name="s">UploadFile对象</param>
/// <param name="oldname">原文件名</param>
/// <param name="UpFileDIR">UpFileDIR: 远程保存的地址，默认为"./"</param>
/// <returns></returns>
public string UploadAttFile(System.Web.HttpPostedFile s, string UpFileDIR, string oldname, string canextension, int length)
{
if (s.FileName.Trim() != "")
{
string res = "";
try
{
//对文件大小进行判断
if (length != 0)
{
if (s.ContentLength > length)
{
HttpContext.Current.Response.Write(PageFunc.ShowErrMsg("上传失败，文件大小超过" + length + "B"));
HttpContext.Current.Response.Write("<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.End();
}
}
if (UpFileDIR.Trim() == "")
{
UpFileDIR = "/"; //保证规格为"/UploadFile/"
}
//上传文件
string extension = Path.GetExtension(s.FileName).ToUpper();
//对文件的扩张名进行判断
if (canextension.IndexOf(extension.Substring(1, extension.Length - 1)) == -1)
{
HttpContext.Current.Response.Write(PageFunc.ShowErrMsg("上传的文件类型不符合系统要求,请上传" + canextension + "类型的文件") + "<script language=javascript>history.go(-1);</script>");
//HttpContext.Current.Response.Write("<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.End();
}
GC.Collect();
Random r = new Random();
string fileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString() + r.Next(1000).ToString();
//return fileName;
string path = Server.MapPath(UpFileDIR + fileName + extension);
s.SaveAs(path);
GC.Collect();
res = UpFileDIR + fileName + extension;
//删除原来文件
string oldFilePath = Server.MapPath(UpFileDIR + oldname);
if (oldname != "" && File.Exists(oldFilePath))
{
File.Delete(oldFilePath);
}
res = res.Substring(res.LastIndexOf("/") + 1, res.Length - res.LastIndexOf("/") - 1);
/////////
return(res);
}
catch (Exception e)
{
//Response.Write(Functions.ShowErrMsg("图片上传失败"));
//HttpContext.Current.Response.Write(Functions.ShowErrMsg(e.ToString()));
HttpContext.Current.Response.Write(PageFunc.ShowErrMsg("上传时出现错误,操作失败"));
HttpContext.Current.Response.Write("<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.End();
// res = oldname;
// return res;
}
return(res);
}
return(oldname);
}
/// <summary>
///
/// </summary>
/// <param name="s">UploadFile对象</param>
/// <param name="oldname">原文件名</param>
/// <param name="UpFileDIR">UpFileDIR: 远程保存的地址，默认为"./"</param>
/// <returns></returns>
public string UploadFile(System.Web.HttpPostedFile s, string oldname, string UpFileDIR, string canextension, int length, int sm, int sm_Width, int sm_hight)
{
if (s.FileName.Trim() != "")
{
string res = "";
try
{
//对文件大小进行判断
if (length != 0)
{
if (s.ContentLength > length)
{
HttpContext.Current.Response.Write(PageFunc.ShowErrMsg("上传失败，文件大小超过" + length + "B"));
HttpContext.Current.Response.Write("<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.End();
}
}
if (UpFileDIR.Trim() == "")
{
UpFileDIR = "/"; //保证规格为"/UploadFile/"
}
else
{
//上传目录不存在，则创建
if (!Directory.Exists(Server.MapPath(UpFileDIR)))
{
Directory.CreateDirectory(Server.MapPath(UpFileDIR));
}
}
//上传文件
string extension = Path.GetExtension(s.FileName).ToUpper();
//对文件的扩张名进行判断
if (canextension.IndexOf(extension.Substring(1, extension.Length - 1)) == -1)
{
HttpContext.Current.Response.Write(PageFunc.ShowErrMsg("上传的文件类型不符合系统要求,请上传" + canextension + "类型的文件") + "<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.Write("<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.End();
}
GC.Collect();
Random r = new Random();
string fileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString() + r.Next(1000).ToString();
//return fileName;
string path = Server.MapPath(UpFileDIR + fileName + extension);
string newSmPath = path.Replace(extension, "_sm" + extension);
s.SaveAs(path);
GC.Collect();
res = UpFileDIR + fileName + extension;
//删除原来文件
string oldFilePath = Server.MapPath(UpFileDIR + oldname);
if (oldname != "" && File.Exists(oldFilePath))
{
File.Delete(oldFilePath);
}
res = res.Substring(res.LastIndexOf("/") + 1, res.Length - res.LastIndexOf("/") - 1);
//当sm为1的时候，表明要生成缩略图
if (sm == 1)
{
////////生成缩略图
//生成小图片
System.Drawing.Image image = new Bitmap(path);//得到原图
//创建指定大小的图
//System.Drawing.Image newImage = image.GetThumbnailImage(sm_Width, sm_hight, null, new IntPtr());
System.Drawing.Bitmap newImage = new Bitmap(sm_Width, sm_hight);
Graphics g = Graphics.FromImage(newImage);
//将原图画到指定的图上
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; //消除锯齿
g.DrawImage(image,
new System.Drawing.Rectangle(0, 0, sm_Width, sm_hight), //你的新大小
new System.Drawing.Rectangle(0, 0, image.Width, image.Height), //你的原图大小
System.Drawing.GraphicsUnit.Pixel);
g.Dispose();
newImage.Save(newSmPath);
}
/////////
return(res);
}
catch (Exception e)
{
//Response.Write(Functions.ShowErrMsg("图片上传失败"));
//HttpContext.Current.Response.Write(Functions.ShowErrMsg(e.ToString()));
HttpContext.Current.Response.Write(PageFunc.ShowErrMsg("上传时出现错误,操作失败。" + e.ToString()));
HttpContext.Current.Response.Write("<script language=javascript>history.go(-1);</script>");
HttpContext.Current.Response.End();
// res = oldname;
// return res;
}
return(res);
}
return(oldname);
}