上篇博客，我们简单的介绍了js实现上传图片之前判断图片格式，同时实现预览。这篇博客，给大家介绍如何上传图片，上传成功之后，再提交表单。下面我们进入正题：
像前面的博客一样，先给大家看一下界面，这样更简单，便于理解。
界面：
HTML的代码：
代码语言：javascript复制<form id="ff" runat="server" method="post">
<div id="content" style="margin-left:50px;">
<table style="width:300px;" id="uniform">
<tr>
<td>书画名称：<input id="paintingName" class="easyui-validatebox" validType:'paintingName' type="text" name="paintingName" data-options="required:true"/></td>
</tr>
<tr>
<td>书画类别：<input id="radPaint" value="国画" class="easyui-validatebox" name="type" type="radio" checked="checked" data-options="required:true" />国画
<input id="rad" name="type" class="easyui-validatebox" type="radio" data-options="required:true" />书法</td>
</tr>
<tr>
<td>书画作者：<asp:DropDownList ID="ddlist" runat="server" Width="155px"></asp:DropDownList>
</td>
</tr>
<tr>
<td>书画价格：<input id="price" class="easyui-numberbox" type="text" name="price" data-options="required:true"/>元</td>
</tr>
<tr>
<td>高 度：<input id="height" class="easyui-numberbox" type="text" name="height" data-options="required:true"/>cm</td>
</tr>
<tr>
<td>
宽 度：<input id="width" class="easyui-numberbox" type="text" name="width" data-options="required:true"/>cm
</td>
</tr>
<tr>
<td>
选择图片:<asp:FileUpload ID="idFile" Width="150px" runat="server" οnchange="javascript:setImagePreview(this,localImag,preview);">
</td>
</tr>
<tr>
<td>
预 览:
<div id="localImag" style="width: 300px; height: 200px;">
<img id="preview" alt="预览图片" οnclick="over(preview,divImage,imgbig);" src="../../Paint/img/default.jpg" width="300" height="200"/>
</div>
</td>
</tr>
</table>
<input type="hidden" id="test" name="test" />
<div style="width:300px; text-align:center;">
<a href="javascript:void(0)" class="easyui-linkbutton" οnclick="submitForm()">确定</a>
<a href="javascript:void(0)" class="easyui-linkbutton" οnclick="clearForm()">取消</a>
</div>
<%--显示大图标的区域--%>
<div id="divImage" style="display: none;left:365px;top:40px;position: absolute">
<img id="imgbig" οnclick="out();" src="" alt="大图" />
</div>
</div>
</form>JS代码：
代码语言：javascript复制 //显示图片
function over(imgid, obj, imgbig) {
//大图显示的最大尺寸 4比3的大小 400 300
maxwidth = 400;
maxheight = 300;
//显示
obj.style.display = "";
imgbig.src = imgid.src;
//1、宽和高都超过了，看谁超过的多，谁超的多就将谁设置为最大值，其余策略按照2、3
//2、如果宽超过了并且高没有超，设置宽为最大值
//3、如果宽没超过并且高超过了，设置高为最大值
if (img.width > maxwidth && img.height > maxheight) {
pare = (img.width - maxwidth) - (img.height - maxheight);
if (pare >= 0)
img.width = maxwidth;
else
img.height = maxheight;
}
else if (img.width > maxwidth && img.height <= maxheight) {
img.width = maxwidth;
}
else if (img.width <= maxwidth && img.height > maxheight) {
img.height = maxheight;
}
}
//隐藏图片
function out() {
document.getElementById('divImage').style.display = "none";
}
//保存信息
function submitForm() {
$.messager.confirm('提示', '你确定要添加此记录吗？', function (r) {
if (r) {
//先上传图片后，再提交
upLoadFile();
var test = document.getElementById("test").value = "add";
var paintingName = document.getElementById("paintingName").value;
var artistID = document.getElementById("ddlist").value;
var type = $(":checkbox[name='type']").attr("checked") == true ? "书法" : "国画";
var price = document.getElementById("price").value;
var height = document.getElementById("height").value;
var width = document.getElementById("width").value;
var idFile = document.getElementById("idFile").value;
//先判断是否上传图片之后在提交
$('#ff').form('submit', {
url: "Painting.ashx?paintingName=" paintingName "&artistID=" artistID
"&type=" type "&price=" price "&height=" height "&width=" width
"&idFile=" idFile "&addID=" addID "&test=" test,
dataType: "json",
onSubmit: function () {
return $(this).form('validate');
},
success: function (result) {
if (result == "T") {
//清空文本框
document.getElementById("paintingName").value = "";
document.getElementById("price").value = "";
document.getElementById("height").value = "";
document.getElementById("width").value = "";
document.getElementById("idFile").value = "";
document.getElementById("preview").value = "";
$.messager.alert('提示', '恭喜您，信息添加成功！', 'info');
}
else {
$.messager.alert('提示', '保存失败，请您核对！', 'info');
}
}
});
}
});
}
//上传图片
function upLoadFile() {
var idFile = document.getElementById("idFile").value;
//判断是否选择图片
if (idFile == null || idFile == "") {
$.messager.alert('提示','请添加图片!');
document.getElementById("idFile").focus();
document.getElementById("idFile").select();
return;
}
var options = {
type: "POST",
url: 'Files.ashx',
//success: showResponse
};
// 将options传给ajaxForm
$('#ff').ajaxSubmit(options);
}
//function showResponse() {
// alert("上传成功!");
//}
function clearForm(){
//清空文本框
document.getElementById("paintingName").value = "";
document.getElementById("price").value = "";
document.getElementById("height").value = "";
document.getElementById("width").value = "";
document.getElementById("idFile").value = "";
}后台一般处理程序的代码：
上传图片的一般处理程序：
代码语言：javascript复制<span style="font-size:14px;"> /// <summary>
/// Files 的摘要说明
/// </summary>
public class Files : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//图片名
HttpFileCollection files = context.Request.Files;
if (files.Count > 0)
{
for (int i = 0; i < files.Count; i )
{
HttpPostedFile file = files[i];
if (file.ContentLength > 0)
{
//全路径
string FullFullName = file.FileName;
//获取图片的名称
String fileName = FullFullName.Substring(FullFullName.LastIndexOf("\") 1);
//保存路径D:GoodCommunitySystem2.0 - 副本GoodCommunitySystemPaintimg
string path = "~/Paint/img";
file.SaveAs(System.Web.HttpContext.Current.Server.MapPath(path) "\" fileName);
}
}
}
}
public bool IsReusable
{
get
{
return false;
}
}
}</span>提交表单的一般处理程序：
代码语言：javascript复制 /// <summary>
/// Painting 的摘要说明
/// </summary>
public class Painting : IHttpHandler
{
paintingBLL paintingbll = new paintingBLL();
Entity.paintingEntity paintingEntity = new Entity.paintingEntity();
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string command = context.Request["test"].ToString();//前台传的标示值
if (command == "add")
{
Add(context);
}
}
/// <summary>
/// 添加记录
/// </summary>
/// <param name="context"></param>
public void Add(HttpContext context)
{
paintingEntity.PaintingName = context.Request.QueryString["paintingName"];
paintingEntity.PaintingStyle = context.Request.QueryString["type"];
paintingEntity.PaintingURL = context.Request.QueryString["idFile"];
paintingEntity.Price = Convert.ToInt32(context.Request["price"]);
paintingEntity.AddID = Convert.ToInt32(context.Request["addID"]);
paintingEntity.ArtistID = Convert.ToInt32(context.Request["artistID"]);
paintingEntity.Height = Convert.ToInt32(context.Request.QueryString["height"]);
paintingEntity.Width = Convert.ToInt32(context.Request.QueryString["width"]);
try
{
if (paintingbll.Add(paintingEntity))
{
context.Response.Write("T");
}
else
{
context.Response.Write("F");
}
}
catch (Exception ex)
{
throw ex;
}
}
public bool IsReusable
{
get
{
return false;
}
}
}需要引入的js：
代码语言：javascript复制 <%--基础样式--%>
<link href="../../themes/default/easyui.css" rel="stylesheet" />
<%--图标样式--%>
<link href="../../themes/icon.css" rel="stylesheet" />
<%--easyui-js--js的文件有先有后min.js必须在前，easyui.min.js必须在后--%>
<script src="../jquery.min.js"></script>
<%--easyui 的js--%>
<script charset="utf-8" src="../jquery.easyui.min.js"></script>
<%--中文js--%>
<script src="../locale/easyui-lang-zh_CN.js"></script>
<%--上传图片时js--%>
<script src="js/jquery.form.js"></script>上传图片时，需要jquery.form.js的js文件，下载地址：http://download.csdn.net/detail/jiuqiyuliang/6919517
上传图片，并提交表单就是这么简单，一些js代码 一般处理程序，相信你一看就会。后面的博客我会更新一些关于easyui-datagrid的相关博客，敬请期待。
明天是元宵节，也是情人节，祝大家元宵节团团圆圆，情人节，快乐。
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最近有网友，总觉得看的还不是太明白，能不能将paintingBLL和paintingEntity代码贴一下-----新人求罩，我个人觉得实体层就没有必要了，下面我就将paintingBLL的源码粘一下，仅供大家参考。
代码语言：javascript复制using System;
using System.Data;
using System.Collections.Generic;
using Common;
using Entity;
using DALFactory;
using IDAL;
namespace BLL
{
/// <summary>
/// paintingBLL
/// </summary>
public partial class paintingBLL
{
private readonly IpaintingDAL dal=DataAccess.CreatepaintingDAL();
public paintingBLL()
{}
#region BasicMethod
/// <summary>
/// 得到最大ID
/// </summary>
public int GetMaxId()
{
return dal.GetMaxId();
}
/// <summary>
/// 是否存在该记录
/// </summary>
public bool Exists(int PaintingID)
{
return dal.Exists(PaintingID);
}
/// <summary>
/// 增加一条数据
/// </summary>
public bool Add(Entity.paintingEntity Entity)
{
return dal.Add(Entity);
}
/// <summary>
/// 更新一条数据
/// </summary>
public bool Update(Entity.paintingEntity Entity)
{
return dal.Update(Entity);
}
/// <summary>
/// 删除一条数据
/// </summary>
public bool Delete(int PaintingID)
{
return dal.Delete(PaintingID);
}
/// <summary>
/// 删除一条数据
/// </summary>
public bool DeleteList(string PaintingIDlist )
{
return dal.DeleteList(PaintingIDlist );
}
/// <summary>
/// 得到一个对象实体
/// </summary>
public Entity.paintingEntity GetEntity(int PaintingID)
{
return dal.GetEntity(PaintingID);
}
/// <summary>
/// 得到一个对象实体，从缓存中
/// </summary>
public Entity.paintingEntity GetEntityByCache(int PaintingID)
{
string CacheKey = "paintingEntityEntity-" PaintingID;
object objEntity = Common.DataCache.GetCache(CacheKey);
if (objEntity == null)
{
try
{
objEntity = dal.GetEntity(PaintingID);
if (objEntity != null)
{
int EntityCache = Common.ConfigHelper.GetConfigInt("EntityCache");
Common.DataCache.SetCache(CacheKey, objEntity, DateTime.Now.AddMinutes(EntityCache), TimeSpan.Zero);
}
}
catch{}
}
return (Entity.paintingEntity)objEntity;
}
/// <summary>
/// 获得数据列表
/// </summary>
public DataSet GetList(string strWhere)
{
return dal.GetList(strWhere);
}
/// <summary>
/// 获得数据列表
/// </summary>
public DataSet GetPaintingList(string strWhere)
{
return dal.GetPaintingList(strWhere);
}
/// <summary>
/// 获得前几行数据
/// </summary>
public DataSet GetList(int Top,string strWhere,string filedOrder)
{
return dal.GetList(Top,strWhere,filedOrder);
}
/// <summary>
/// 获得数据列表
/// </summary>
public List<Entity.paintingEntity> GetEntityList(string strWhere)
{
DataSet ds = dal.GetList(strWhere);
return DataTableToList(ds.Tables[0]);
}
/// <summary>
/// 获得数据列表
/// </summary>
public List<Entity.paintingEntity> DataTableToList(DataTable dt)
{
List<Entity.paintingEntity> EntityList = new List<Entity.paintingEntity>();
int rowsCount = dt.Rows.Count;
if (rowsCount > 0)
{
Entity.paintingEntity Entity;
for (int n = 0; n < rowsCount; n )
{
Entity = dal.DataRowToEntity(dt.Rows[n]);
if (Entity != null)
{
EntityList.Add(Entity);
}
}
}
return EntityList;
}
/// <summary>
/// 获得数据列表
/// </summary>
public DataSet GetAllList()
{
return GetList("");
}
/// <summary>
/// 分页获取数据列表
/// </summary>
public int GetRecordCount(string strWhere)
{
return dal.GetRecordCount(strWhere);
}
/// <summary>
/// 分页获取数据列表
/// </summary>
public DataSet GetListByPage(string strWhere, string orderby, int startIndex, int endIndex)
{
return dal.GetListByPage( strWhere, orderby, startIndex, endIndex);
}
/// <summary>
/// 分页获取数据列表
/// </summary>
//public DataSet GetList(int PageSize,int PageIndex,string strWhere)
//{
//return dal.GetList(PageSize,PageIndex,strWhere);
//}
#endregion BasicMethod
#region ExtensionMethod
#endregion ExtensionMethod
}
}====================================================================================
注：这篇博文需要和上篇博文结合起来看，预览和上传才完整，否则浏览器可能会报相应错误。
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基于asp.net easyui框架的系列博文：
使用Jquery EasyUI框架开发项目 下载 帮助--EasyUI的简介
Asp.net之真假分页大揭秘、使用AspNetPager实现真分页
Asp.net前端页面开发总结
Asp.net 一般处理程序 扩展
Asp.Net构架(Http请求处理流程)、Asp.Net 构架(Http Handler 介绍)、Asp.Net 构架(HttpModule 介绍)
基于asp.net easyui框架，js实现上传图片之前判断图片格式，同时实现预览，兼容各种浏览器 下载
基于asp.net easyui框架，js提交图片，实现先上传图片再提交表单
基于asp.net easyui框架，一步步学习easyui-datagrid——界面（一）
基于asp.net easyui框架，一步步学习easyui-datagrid——实现分页和搜索（二）
基于asp.net easyui框架，一步步学习easyui-datagrid——实现添加、编辑、删除（三）
基于asp.net easyui框架，一步步学习easyui-datagrid——完成，总结（四）
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