上传图片（MVC和MVC3两种）

【MVC第一种】

Tools.cs：

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Web;

namespace www.landglass.com.Tools
{
    publicstaticclass Tool
    {
        privatestaticreadonlystring APPLICATIONPATH = System.AppDomain.CurrentDomain.BaseDirectory;

        publicstaticstring GetGuid()
        {
            return Guid.NewGuid().ToString().Replace("-", "").ToUpper();
        }
        #region 上传图片、文件代码
        privatedelegatebool FileIsValidHandler(string suffix);
        publicenum UploadingFileType
        { 
            Docuemnt,
            Image
        }
        privatestaticbool ImageFileIsValid(string suffix)
        {
            switch (suffix)
            {
                case"jpg":
                    returntrue;
                case"jpeg":
                    returntrue;
                case"bmp":
                    returntrue;
                case"gif":
                    returntrue;
                case"png":
                    returntrue;
                default:
                    returnfalse;
            }
        }
        privatestaticbool DocumentFileIsValid(string suffix)
        {
            switch (suffix)
            {
                case"xls":
                    returntrue;
                case"ppt":
                    returntrue;
                case"doc":
                    returntrue;
                case"xlsx":
                    returntrue;
                case"pptx":
                    returntrue;
                case"docx":
                    returntrue;
                case"pdf":
                    returntrue;
                case"txt":
                    returntrue;
                case"rar":
                    returntrue;
                default:
                    returnfalse;
            }
        }
        privatestaticbool FileIsValid(string suffix,FileIsValidHandler handler)
        {
            return handler(suffix);
        }
        ///<summary>
        /// 删除图片或者文件
        ///</summary>
publicstaticbool DeleteFile(string filename, string virtualPath)
        {
            string filePath = APPLICATIONPATH +@"\"+ virtualPath +@"\"+ filename;
            try
            {
                if (File.Exists(filePath))
                    File.Delete(filePath);
                returntrue;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        ///<summary>
        /// 文件存储
        ///</summary>
publicstaticbool UploadFileToServer(UploadingFileType type, HttpPostedFile file, string virtualPath, string id, outstring newFileName)
        {
            newFileName =string.Empty;
            if (file !=null&&!string.IsNullOrEmpty(file.FileName) && file.ContentLength <=300000)
            {
                bool flag = ValidateFileAndGetName(type, file, id, out newFileName);
                if (flag)
                    file.SaveAs(APPLICATIONPATH + virtualPath +@"\"+ newFileName);
                return flag;
            }

            returnfalse;
        }
        ///<summary>
        /// 验证上传文件是否合法并设置获取新的文件名
        ///</summary>
privatestaticbool ValidateFileAndGetName(UploadingFileType type,HttpPostedFile file, string id,outstring newFileName)
        {
            id =string.IsNullOrEmpty(id) ? GetGuid() : id;
            int index = file.FileName.LastIndexOf(".");
            string suffix = file.FileName.Substring(index +1).Trim().ToLower();
            newFileName =string.Format("{0}.{1}", id, suffix);
            
            switch (type)
            { 
                case UploadingFileType.Docuemnt:
                    return FileIsValid(suffix, DocumentFileIsValid);
                case UploadingFileType.Image:
                    return FileIsValid(suffix, ImageFileIsValid);
                default:
                    returnfalse;
            }
        }
        #endregion
    }
}

controller.cs

///<summary>
        /// 执行添加/修改产品信息操作
        ///</summary>
        ///<param name="additionalDocFile">文件</param>
        ///<param name="additionalImgFile">图片</param>
publicvoid SubmitSave(HttpPostedFile additionalDocFile, HttpPostedFile additionalImgFile)
        {
            CancelLayoutAndView();
            Product product =new Product();
            BindObjectInstance(product, ParamStore.Form, "product");
            bool isUpdate =false;
            if (string.IsNullOrEmpty(product.ID))//如果id存在，执行修改
            {
                product.ID = Tool.GetGuid();
            }
            else
            {
                isUpdate =true;
            }
            #region Uploading Files
            bool flagUploadFile =true;
            if (additionalImgFile !=null&&!string.IsNullOrEmpty(additionalImgFile.FileName))//修改图片
            {
                string imgUrl =string.Empty;
                flagUploadFile = Tool.UploadFileToServer(Tool.UploadingFileType.Image, additionalImgFile, PRODUCTIMAGES, product.ID, out imgUrl);
                if (flagUploadFile)
                {
                    product.ProductImgUrl = imgUrl;
                }
                else
                {
                    Response.Write(string.Format("<script type='text/javascript'>alert('上传图片失败!');history.go(-1);</script>"));
                    return;
                }
            }
            if (additionalDocFile !=null&&!string.IsNullOrEmpty(additionalDocFile.FileName))//修改文件
            {
                string imgUrl =string.Empty;
                flagUploadFile = Tool.UploadFileToServer(Tool.UploadingFileType.Docuemnt, additionalDocFile, PRODUCTDECUMENTS, product.ID, out imgUrl);
                if (flagUploadFile)
                {
                    product.ProductDocUrl = imgUrl;
                }
                else
                {
                    Response.Write(string.Format("<script type='text/javascript'>alert('上传文件失败!');history.go(-1);</script>"));
                    return;
                }
            }
            #endregion
            bool flag = isUpdate ? _pModel.Update(product) : _pModel.Add(product);
            if (!isUpdate &&!flag)
            {
                Tool.DeleteFile(product.ProductImgUrl, PRODUCTIMAGES);
                Tool.DeleteFile(product.ProductDocUrl, PRODUCTDECUMENTS);
            }
            Response.Write(string.Format("<script type='text/javascript'>alert('成功!');window.location.href='index.aspx';</script>"));
        }

页面.vm

<form action="SubmitSave.aspx" method="post" enctype="multipart/form-data">
<input type="file" name="additionalImgFile"/>
                    #if($product.ProductImgUrl!="")         
                    <input type="hidden" name="product.ProductImgUrl" value="$!{product.ProductImgUrl}"/> 
                    <img id="product.ProductImgUrl" name="product.ProductImgUrl" width="100px" height="50px" src="$!SiteRoot/UploadFiles/ProductImages/$!{product.ProductImgUrl}"/>
                    #end
</form>

生成缩略图.cs

#region 生成缩略图
        ///<summary>
        /// 生成缩略图,[Author]落叶十九,[UpdateTime]2010-12-30
        ///</summary>
        ///<param name="originalImagePath">源图路径（物理路径）</param>
        ///<param name="thumbnailPath">缩略图路径（物理路径）</param>
        ///<param name="width">缩略图宽度</param>
        ///<param name="height">缩略图高度</param>
        ///<param name="mode">生成缩略图的方式</param>
publicstaticvoid MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
        {
            Image originalImage =Image.FromFile(originalImagePath);

            int towidth = width;
            int toheight = height;

            int x =0;
            int y =0;
            int ow = originalImage.Width;
            int oh = originalImage.Height;

            switch (mode)
            {
                case"HW"://指定高宽缩放（可能变形）                
break;
                case"W"://指定宽，高按比例                    
                    toheight = originalImage.Height * width / originalImage.Width;
                    break;
                case"H"://指定高，宽按比例
                    towidth = originalImage.Width * height / originalImage.Height;
                    break;
                case"Cut"://指定高宽裁减（不变形）                
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                    {
                        oh = originalImage.Height;
                        ow = originalImage.Height * towidth / toheight;
                        y =0;
                        x = (originalImage.Width - ow) /2;
                    }
                    else
                    {
                        ow = originalImage.Width;
                        oh = originalImage.Width * height / towidth;
                        x =0;
                        y = (originalImage.Height - oh) /2;
                    }
                    break;
                default:
                    break;
            }
            //新建一个bmp图片
            System.Drawing.Image bitmap =new System.Drawing.Bitmap(towidth, toheight);

            //新建一个画板
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

            //设置高质量插值法
            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;

            //清空画布并以透明背景色填充
            g.Clear(System.Drawing.Color.Transparent);

            //在指定位置并且按指定大小绘制原图片的指定部分
            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
                new System.Drawing.Rectangle(x, y, ow, oh),
                System.Drawing.GraphicsUnit.Pixel);

            try
            {
                //以jpg格式保存缩略图
                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
            catch (System.Exception e)
            {
                throw e;
            }
            finally
            {
                originalImage.Dispose();
                bitmap.Dispose();
                g.Dispose();
            }
        }
        #endregion

删除文件或者图片.cs

publicbool DeleteImages(string imgUrl)
        {
            try
            {
                string basePath = System.AppDomain.CurrentDomain.BaseDirectory + _uploadpath;
                string filePath = basePath +@"\"+ imgUrl;
                string thumbFilePath = basePath +@"\s_"+ imgUrl;
                if(File.Exists(filePath))
                    File.Delete(filePath);
                if(File.Exists(thumbFilePath))
                    File.Delete(thumbFilePath);
                returntrue;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

[MVC3上传图片]

Tools.cs

publicstaticstring GetGuid()
        {
            return Guid.NewGuid().ToString().Replace("-", "").ToUpper();
        }
        #region 上传图片、文件代码
        privatedelegatebool FileIsValidHandler(string suffix);
        publicenum UploadingFileType
        {
            Docuemnt,
            Image
        }
        privatestaticbool ImageFileIsValid(string suffix)
        {
            switch (suffix)
            {
                case"jpg":
                    returntrue;
                case"jpeg":
                    returntrue;
                case"bmp":
                    returntrue;
                case"gif":
                    returntrue;
                case"png":
                    returntrue;
                default:
                    returnfalse;
            }
        }
        privatestaticbool DocumentFileIsValid(string suffix)
        {
            switch (suffix)
            {
                case"xls":
                    returntrue;
                case"ppt":
                    returntrue;
                case"doc":
                    returntrue;
                case"xlsx":
                    returntrue;
                case"pptx":
                    returntrue;
                case"docx":
                    returntrue;
                case"pdf":
                    returntrue;
                case"txt":
                    returntrue;
                case"rar":
                    returntrue;
                default:
                    returnfalse;
            }
        }
        privatestaticbool FileIsValid(string suffix, FileIsValidHandler handler)
        {
            return handler(suffix);
        }
        ///<summary>
        /// 删除图片或者文件
        ///</summary>
publicstaticbool DeleteFile(string filename, string virtualPath)
        {
            string filePath = APPLICATIONPATH +@"\"+ virtualPath +@"\"+ filename;
            try
            {
                if (File.Exists(filePath))
                    File.Delete(filePath);
                returntrue;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }
        ///<summary>
        /// 文件存储
        ///</summary>
publicstaticbool UploadFileToServer(UploadingFileType type, HttpPostedFileBase file, string virtualPath, string id, outstring newFileName)
        {
            newFileName =string.Empty;
            if (file !=null&&!string.IsNullOrEmpty(file.FileName) && file.ContentLength <=5000000)
            {
                bool flag = ValidateFileAndGetName(type, file, id, out newFileName);
                if (flag)
                {
                    string filePath = APPLICATIONPATH + virtualPath +@"\"+ newFileName;
                    string sFilePath = APPLICATIONPATH + virtualPath +@"\s_"+ newFileName;
                    string middleFilePath = APPLICATIONPATH + virtualPath +@"\m_"+ newFileName;
                    string bigFilePath = APPLICATIONPATH + virtualPath +@"\big_"+ newFileName;
                    file.SaveAs(filePath);
                    if (type != UploadingFileType.Docuemnt)
                        MakeThumbnail(filePath, sFilePath, 214, 159, "HW");
                    MakeThumbnail(filePath, middleFilePath, 400, 300, "HW");
                }
                return flag;
            }

            returnfalse;
        }
        ///<summary>
        /// 文件存储
        ///</summary>
publicstaticbool UploadImageToServer(UploadingFileType type, HttpPostedFileBase file, string virtualPath, string id, int ImageWidth, int ImageHeight, outstring newFileName)
        {
            newFileName =string.Empty;
            if (file !=null&&!string.IsNullOrEmpty(file.FileName) && file.ContentLength <=5000000)
            {
                bool flag = ValidateFileAndGetName(type, file, id, out newFileName);
                if (flag)
                {
                    string filePath = APPLICATIONPATH + virtualPath +@"\"+ newFileName;
                    string sFilePath = APPLICATIONPATH + virtualPath +@"\s_"+ newFileName;
                    file.SaveAs(filePath);
                    if (type != UploadingFileType.Docuemnt)
                        MakeThumbnail(filePath, sFilePath, ImageWidth, ImageHeight, "HW");
                }
                return flag;
            }

            returnfalse;
        }
        ///<summary>
        /// 验证上传文件是否合法并设置获取新的文件名
        ///</summary>
privatestaticbool ValidateFileAndGetName(UploadingFileType type, HttpPostedFileBase file, string id, outstring newFileName)
        {
            id =string.IsNullOrEmpty(id) ? GetGuid() : id;
            int index = file.FileName.LastIndexOf(".");
            string suffix = file.FileName.Substring(index +1).Trim().ToLower();
            newFileName =string.Format("{0}.{1}", id, suffix);

            switch (type)
            {
                case UploadingFileType.Docuemnt:
                    return FileIsValid(suffix, DocumentFileIsValid);
                case UploadingFileType.Image:
                    return FileIsValid(suffix, ImageFileIsValid);
                default:
                    returnfalse;
            }
        }
        /// 生成缩略图
        ///</summary>
        ///<param name="originalImagePath">源图路径（物理路径）</param>
        ///<param name="thumbnailPath">缩略图路径（物理路径）</param>
        ///<param name="width">缩略图宽度</param>
        ///<param name="height">缩略图高度</param>
        ///<param name="mode">生成缩略图的方式</param>
publicstaticvoid MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
        {
            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
            int towidth = width;
            int toheight = height;

            int x =0;
            int y =0;
            int ow = originalImage.Width;
            int oh = originalImage.Height;

            switch (mode)
            {
                case"HW"://指定高宽缩放（可能变形）                
break;
                case"W"://指定宽，高按比例                    
                    toheight = originalImage.Height * width / originalImage.Width;
                    break;
                case"H"://指定高，宽按比例
                    towidth = originalImage.Width * height / originalImage.Height;
                    break;
                case"Cut"://指定高宽裁减（不变形）                
if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                    {
                        oh = originalImage.Height;
                        ow = originalImage.Height * towidth / toheight;
                        y =0;
                        x = (originalImage.Width - ow) /2;
                    }
                    else
                    {
                        ow = originalImage.Width;
                        oh = originalImage.Width * height / towidth;
                        x =0;
                        y = (originalImage.Height - oh) /2;
                    }
                    break;
                default:
                    break;
            }

            //新建一个bmp图片
            System.Drawing.Image bitmap =new System.Drawing.Bitmap(towidth, toheight);

            //新建一个画板
            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

            //设置高质量插值法
            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;

            //清空画布并以透明背景色填充
            g.Clear(System.Drawing.Color.Transparent);

            //在指定位置并且按指定大小绘制原图片的指定部分
            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
                new System.Drawing.Rectangle(x, y, ow, oh),
                System.Drawing.GraphicsUnit.Pixel);

            try
            {
                //以jpg格式保存缩略图
                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
            }
            catch (System.Exception e)
            {
                throw e;
            }
            finally
            {
                originalImage.Dispose();
                bitmap.Dispose();
                g.Dispose();
            }
        }
        #endregion

Controller.cs

引入：
using Project.Tools;
using System.Configuration;
  
privatestaticreadonlystring PRODUCTIMAGES = ConfigurationManager.AppSettings["PhotosImages"];//图片路径
///<summary>
        /// 照片
        ///</summary>
        ///<returns></returns>
public ActionResult Photos()
        {
            ViewBag.PhotosImgUrl ="http://images.cnblogs.com/face-2.2.jpg";
            return View();
        }
        ///<summary>
        /// 每周上传图片|图片编辑
        ///</summary>
        ///<returns></returns>
        [HttpPost]
        public ActionResult Photos(HttpPostedFileBase additionalImgFile)
        {
            ViewBag.PhotosImgUrl ="http://images.cnblogs.com/face-2.2.jpg";
            #region 图片上传
            bool flagUploadFile =true;
            if (additionalImgFile !=null&&!string.IsNullOrEmpty(additionalImgFile.FileName))//修改图片
            {
                string imgUrl =string.Empty;
                flagUploadFile = Tool.UploadFileToServer(Tool.UploadingFileType.Image, additionalImgFile, PRODUCTIMAGES, "20110727", out imgUrl);
                if (flagUploadFile)
                {
                    ViewBag.PhotosImgUrl = PRODUCTIMAGES +"s_"+ imgUrl;
                }
                else
                {
                    Response.Write(string.Format("<script type='text/javascript'>alert('上传图片失败!');history.go(-1);</script>"));
                    return View();
                }
            }
            else
            {
                Response.Write(string.Format("<script type='text/javascript'>alert('请选择要上传的照片!');history.go(-1);</script>"));
                return View();
            }
            #endregion
            return View();
        }

页面.cshtml

<form action="UserSet" method="post" name="form1" enctype="multipart/form-data">

  <img src="@ViewBag.UserHeadImgUrl" id="userHeadImgUrl" name="userHeadImgUrl" style="width:60px;height:60px;border:solid 1px #cccccc;" width="100px" height="100px"/>

                <input name="additionalImgFile" type="file" size="20"/>

                <input type="hidden" name="userHeadImgUrl" value="@ViewBag.UserHeadImgUrl"/><br />

                <font color="#999999">图片格式必须为jpg或gif格式，图片大小不超过200K。</font>


</from>