基于asp.net+ easyui框架，js提交图片，实现先上传图片再提交表单

         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：

<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" onchange="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" onclick="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" onclick="submitForm()">确定</a>
	    <a href="javascript:void(0)" class="easyui-linkbutton" onclick="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" onclick="out();" src="" alt="大图" />  
        </div>  
    </div>
    </form>

JS代码：

        //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：

 /// <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\GoodCommunitySystem\Paint\img                        string path = "~/Paint/img";
                        file.SaveAs(System.Web.HttpContext.Current.Server.MapPath(path) + "\\" + fileName);
                    }
                }
            }
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }

提交表单的一般处理程序：

  /// <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;
            }
        }
    }

    <%--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。