Views
@using (Html.BeginForm("Create","img",FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<table width="600" border="0">
<tr>
<td width="83">图片：</td>
<td width="507"> <input type="file" name="filImgs" id="filImgs"/></td>
</tr>
<tr>
<td>链接地址：</td>
<td> @Html.EditorFor(model => model.LinkUrl)</td>
</tr>
<tr>
<td> <b>排序: </b></td>
<td> @Html.EditorFor(model => model.Orderby)</td>
</tr>
<tr>
<td> </td>
<td> <input type="button" onclick="Check(1)" value="新增" /></td>
</tr>
</table>
}
JS
function Check(str) {
var img = $("#filImgs").val();
var Orderby = $("#Orderby").val();
var reg = new RegExp("^[0-9]*$");
if(img.length<=0&&str==1)
{
alert('请上传图片');
return false;
}
else if (Orderby.length <= 0) {
alert("排序不能为空!");
return false;
}
else if (Orderby.length > 0 && !reg.test(Orderby)) {
alert("请输入数字!");
return false;
}
else {
document.forms[0].submit();
}
}
Conrollers
private EFHelpDB db = new EFHelpDB();
public ActionResult Create()
{
return View();
} //
// POST: /Admin/Img/Create [HttpPost] public ActionResult Create(tb_Img tb_img)
{
try
{
var file = Request.Files[0];
var img = new upload().UpLoadImage(file, "/upfile/", "thumb_", 89, 71);
if (img.IndexOf("thumb_") > -1)
{
tb_img.ImgUrl = img;
} db.Img.Add(tb_img);
db.SaveChanges();
return RedirectToAction("Index"); }
catch(Exception ex)
{
return View("index");
} }
Models
public class tb_Img
{
public int ID { get; set; }
public string LinkUrl { get; set; }
public string ImgUrl { get; set; }
public int Orderby { get; set; }
}
上传图片类
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Drawing;
using System.Web.UI.HtmlControls;
namespace MVC.Models
{
public class upload
{
/// <summary>
/// 图片上传
/// </summary>
/// <param name="fulFile">上传控件</param>
/// <param name="DirectionName">文件所放的父文件夹</param>
/// <returns>string</returns>
public upload() { } /// <summary>
/// asp.net上传图片并生成缩略图
/// </summary>
/// <param name="upImage">HttpPostedFileBase控件</param>
/// <param name="sSavePath">保存的路径,些为相对服务器路径的下的文件夹</param>
/// <param name="sThumbExtension">缩略图的thumb</param>
/// <param name="intThumbWidth">生成缩略图的宽度</param>
/// <param name="intThumbHeight">生成缩略图的高度</param>
/// <returns>缩略图名称</returns>
public string UpLoadImage(HttpPostedFileBase upImage, string sSavePath, string sThumbExtension, int intThumbWidth, int intThumbHeight)
{
string sThumbFile = "";
string sFilename = ""; if (upImage.FileName != null)
{ int nFileLen = upImage.ContentLength;
if (nFileLen == 0)
return "没有选择上传图片"; //获取upImage选择文件的扩展名
string extendName = System.IO.Path.GetExtension(upImage.FileName).ToLower();
//判断是否为图片格式
if (extendName != ".jpg" && extendName != ".jpge" && extendName != ".gif" && extendName != ".bmp" && extendName != ".png")
return "图片格式不正确"; byte[] myData = new Byte[nFileLen];
upImage.InputStream.Read(myData, 0, nFileLen); sFilename = System.IO.Path.GetFileName(upImage.FileName);
int file_append = 0;
//检查当前文件夹下是否有同名图片,有则在文件名+1
while (System.IO.File.Exists(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename)))
{
file_append++;
sFilename = System.IO.Path.GetFileNameWithoutExtension(upImage.FileName)
+ file_append.ToString() + extendName;
}
System.IO.FileStream newFile
= new System.IO.FileStream(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename),
System.IO.FileMode.Create, System.IO.FileAccess.Write);
newFile.Write(myData, 0, myData.Length);
newFile.Close(); //以上为上传原图 try
{
//原图加载
using (System.Drawing.Image sourceImage = System.Drawing.Image.FromFile(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename)))
{
//原图宽度和高度
int width = sourceImage.Width;
int height = sourceImage.Height;
int smallWidth;
int smallHeight; //获取第一张绘制图的大小,(比较 原图的宽/缩略图的宽 和 原图的高/缩略图的高)
if (((decimal)width) / height <= ((decimal)intThumbWidth) / intThumbHeight)
{
smallWidth = intThumbWidth;
smallHeight = intThumbWidth * height / width;
}
else
{
smallWidth = intThumbHeight * width / height;
smallHeight = intThumbHeight;
} //判断缩略图在当前文件夹下是否同名称文件存在
file_append = 0;
sThumbFile = sThumbExtension + System.IO.Path.GetFileNameWithoutExtension(upImage.FileName) + extendName; while (System.IO.File.Exists(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sThumbFile)))
{
file_append++;
sThumbFile = sThumbExtension + System.IO.Path.GetFileNameWithoutExtension(upImage.FileName) +
file_append.ToString() + extendName;
}
//缩略图保存的绝对路径
string smallImagePath = System.Web.HttpContext.Current.Server.MapPath(sSavePath) + sThumbFile; //新建一个图板,以最小等比例压缩大小绘制原图
using (System.Drawing.Image bitmap = new System.Drawing.Bitmap(smallWidth, smallHeight))
{
//绘制中间图
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap))
{
//高清,平滑
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.Clear(Color.Black);
g.DrawImage(
sourceImage,
new System.Drawing.Rectangle(0, 0, smallWidth, smallHeight),
new System.Drawing.Rectangle(0, 0, width, height),
System.Drawing.GraphicsUnit.Pixel
);
}
//新建一个图板,以缩略图大小绘制中间图
using (System.Drawing.Image bitmap1 = new System.Drawing.Bitmap(intThumbWidth, intThumbHeight))
{
//绘制缩略图
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap1))
{
//高清,平滑
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.Clear(Color.Black);
int lwidth = (smallWidth - intThumbWidth) / 2;
int bheight = (smallHeight - intThumbHeight) / 2;
g.DrawImage(bitmap, new Rectangle(0, 0, intThumbWidth, intThumbHeight), lwidth, bheight, intThumbWidth, intThumbHeight, GraphicsUnit.Pixel);
g.Dispose();
bitmap1.Save(smallImagePath, System.Drawing.Imaging.ImageFormat.Jpeg);
}
}
}
}
}
catch
{
//出错则删除
System.IO.File.Delete(System.Web.HttpContext.Current.Server.MapPath(sSavePath + sFilename));
return "图片格式不正确";
}
//返回缩略图名称
return sThumbFile;
}
return "没有选择图片";
} }
}