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asp.net之上传文件管理策略_asp.net技巧
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发布于:2010-12-15 21:09
 | |  |  | 最近做的项目跟ASP.NET上传文件内容有关,故将代码贴出,以便网友查阅,提供解决此类问题思路:如出现所有不理解问题,请留言,及时帮你解决!
原文件名:
上传到服务器:
缩略图地址:
文件类型:
文件大小:
文件拓展名:
上传日期:
图片预览:
*******************************************************************************using System; using System.Data; using System.Configuration; using System.Collections; using System.web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls;using MWO.Model.Info; using MWO.DAL.Info; public partial class Login : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void ButtonUp_Click(object sender, EventArgs e) { if (FileUpload1.PostedFile.FileName != null) { try { FileName.InnerHtml = FileUpload1.PostedFile.FileName;//GetPhotoName UpDateTime.InnerHtml = DateTime.Now.ToShortDateString();//UpDateTime #region SetPhotoSize FileLength.InnerHtml = CountSize(FileUpload1.PostedFile.ContentLength); if (FileUpload1.PostedFile.ContentLength > 1024 * 1024 * 2) { Response.Write("alert(图片不能超过规定大小!); "); } else { #region SetPhotoFormat FileType.InnerHtml = FileUpload1.PostedFile.ContentType; FileExtention.InnerHtml = System.IO.Path.GetExtension(FileUpload1.PostedFile.FileName).ToUpper(); string m_FileName = "www.MWO.Com-" + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss-ffff").Replace(".", "-") + FileExtention.InnerHtml; string m_sFileName = "www.MWO.Com-" + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss-ffff").Replace(".", "-") + FileExtention.InnerHtml; if (FileExtention.InnerHtml == ".JPG") { string m_SavePath = Server.MapPath("./photo/") + m_FileName; SaveDir.InnerHtml = m_SavePath; #region SetSmallPhoto this.MakeSmallImg(FileUpload1.PostedFile, this.Server.MapPath("./SPhoto/") + m_sFileName, 118, 90); string m_sSavePath = this.Server.MapPath("./SPhoto/") + m_sFileName; sSaveDir.InnerHtml = m_sSavePath; #endregion FileUpload1.PostedFile.SaveAs(m_SavePath); Response.Write("alert(图片文件保存成功!); "); #region SaveDataBasee PhotoInfo m_PInfo = new PhotoInfo(); m_PInfo.Organization = "5173"; m_PInfo.PicName = FileName.InnerHtml; m_PInfo.ServerName = "GLSDB"; m_PInfo.Cdate = DateTime.Now; m_PInfo.Exp = FileExtention.InnerHtml; m_PInfo.Flag = 0; m_PInfo.GameNickName = "Bruce";//TextBox控件内容 m_PInfo.MoonStar = 0; m_PInfo.ShowIndex = 0; m_PInfo.SPicHttpAddr = m_sSavePath; m_PInfo.Type = 0; m_PInfo.Vote = 0; m_PInfo.PicHttpAddr=m_SavePath; PhotoDAO m_PDao = new PhotoDAO(); m_PDao.Insert(m_PInfo); #endregion } else { Response.Write("alert(图片格式不正确,请选择图片文件!); "); } #endregion } #endregion } catch (Exception m_Ex) { Response .Write ("alert("+m_Ex.ToString ()+"); "); } } else if (FileUpload1.PostedFile.FileName == "") { Response.Write("alert(上传文件不能为空!); "); } } #region /// /// 计算文件大小函数,Size为字节大小 /// /// 初始文件大小 /// public string CountSize(long Size) { string m_strSize = ""; long FactSize = 0; FactSize = Size; if (FactSize <= 1024) m_strSize = FactSize.ToString() + "Byte"; if(FactSize>=1024;;FactSize<=1048576) m_strSize=(FactSize/1024).ToString ()+"K"; if (FactSize >= 1048576 ;; FactSize <= 10485760) m_strSize = (FactSize / 1024 / 1024).ToString() + "M"; return m_strSize; } #endregion #region SaveSmallPhoto /// /// 高清晰缩略图算法 /// /// 图片文件对象 /// 要保存为缩略图的源文件 /// 宽度 /// 高度 public void MakeSmallImg(System.Web.HttpPostedFile postFile, string saveImg, System.Double Width, System.Double Height) { //SourcePhotoName string m_OriginalFilename = postFile.FileName; string m_strGoodFile = saveImg; //GetPhotoObject From SourceFile System.Drawing.Image m_Image = System.Drawing.Image.FromStream(postFile.InputStream, true); System.Double NewWidth, NewHeight; if (m_Image.Width > m_Image.Height) { NewWidth = Width; NewHeight = m_Image.Height * (NewWidth / m_Image.Width); } else { NewHeight = Height; NewWidth = (NewHeight / m_Image.Height) * m_Image.Width; } if (NewWidth > Width) { NewWidth = Width; } if (NewHeight > Height) { NewHeight = Height; } //GetPhotoSize System.Drawing.Size size =new System.Drawing.Size((int)NewWidth, (int)NewHeight); //The New of Bimp Photo System.Drawing.Image bitmap = new System.Drawing.Bitmap(size.Width, size.Height); // The New of Palette System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap); // Set HightQuality Arithmetic For Graphics g.interpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; //设置高质量,低速度呈现平滑程度 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; //ClearCanvas g.Clear(System.Drawing.Color.White); //在指定位置画图 g.DrawImage(m_Image, new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), new System.Drawing.Rectangle(0, 0, m_Image.Width, m_Image.Height), System.Drawing.GraphicsUnit.Pixel); //SavePhoto Of HightFocus bitmap.Save(m_strGoodFile, System.Drawing.Imaging.ImageFormat.Jpeg); //DisposeRes g.Dispose(); m_Image.Dispose(); bitmap.Dispose(); } #endregion }
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