专栏首页zcqshine's blogajaxFileUpload+ThinkPHP+jqGrid 图片上传与显示

ajaxFileUpload+ThinkPHP+jqGrid 图片上传与显示

  • jqgrid上要显示图片和上传图片的列,格式如下:
{label:'图片',name:'icon',index:'icon',autowidth:true,formatter:alarmFormatter,editable:true,edittype:'custom', editoptions:{custom_element: ImgUpload, custom_value:GetImgValue}},

注意:edittype要为custom 也就是自定义编辑格式.

editoptions:{custom_element: ImgUpload, custom_value:GetImgValue}}

  • jqgrid 的列表里显示图片用到的 js function 此处与图片的上传没关系.
function alarmFormatter(cellvalue, options, rowdata){
        return '<img src="__MODULE__/download/download?id= '+ rowdata.icon + '" style="width:50x;height:50px" />'
    }
  • 下面为上传用到的 js 文件 upload.js
/**
 4. 自定义文件上传列
 5. @param value
 6. @param editOptions
 7. @returns {*|jQuery|HTMLElement}
 8. @constructor
 */
function ImgUpload(value, editOptions) {
    var span = $("<span>");
    var hiddenValue = $("<input>",{type:"hidden", val:value, name:"fileName", id:"fileName"});
    var image = $("<img>",{name:"uploadImage", id:"uploadImage",value:'',style:"display:none;width:80px;height:80px"});
    var el = document.createElement("input");
    el.type = "file";
    el.id = "imgFile";
    el.name = "imgFile";
    el.onchange = UploadFile;
    span.append(el).append(hiddenValue).append(image);
    return span;
}
/**
 9. 调用 ajaxFileUpload 上传文件
 10. @returns {boolean}
 11. @constructor
 */
function UploadFile() {
    $.ajaxFileUpload({
        url : 'index.php/Home/upload/upload',
        type : 'POST',
        secureuri:false,
        fileElementId: 'imgFile',
        dataType : 'json',
        success: function(data,status){
            //显示图片
            $("#fileName").val(data.id);
            $("#uploadImage").attr("src","index.php/Home/download/download?id=" + data.id);
            $("#uploadImage").show();
            $("#imgFile").hide()
        },
        error: function(data, status, e){
            alert(e);
        }
    });
    return false;
}
/**
 12. icon 编辑的时候该列对应的实际值
 13. @param elem
 14. @param sg
 15. @param value
 16. @returns {*|jQuery}
 17. @constructor
 */
function GetImgValue(elem, sg, value){
    return $(elem).find("#fileName").val();
}
  • 下面为ThinkPHP上传代码部分
<?php
/**
 * 上传文件
 * Created by PhpStorm.
 * User: zcqshine
 * Date: 15/12/31
 * Time: 14:16
 */

namespace Home\Controller;
use Home\Common\HomeController;
use Think\Upload;

class UploadController extends HomeController
{
    public function upload(){
        $upload = new Upload();
        $upload->maxSize = 4194304; //4MB
        $upload->exts = array('jpg','gif','png','jpeg');
        $upload->rootPath = C("FILE_PATH"); //根目录
        $upload->autoSub = false;
//        $upload->savePath = C("FILE_PATH"); //附件上传目录, 相对于根目录
//        $upload->saveName = array('uniqid','');

        //上传文件
        $info = $upload->uploadOne($_FILES['imgFile']);
        if(!$info){ //上传错误提示信息
            $this->e($upload->getError());
            $this->returnError($upload->getError());
        }else{
            //存数据库部分
            $photo = D('photo');
            $photo->name = $info['savename'];
            $photo->realName = $info['name'];
            $photo->suffix = $info['ext'];
            $photo->size = $info['size'];
            //...省略部分代码
            $id = $photo->add();
//            $this->ajaxReturn(array('msg'=>$id),"JSON");
            echo json_encode(array('id'=>$id));
        }
    }
}

因为 thinkphp 自带的 ajaxReturn 返回的数据带有pre标签,会导致ajaxFIleUpload 解析不了,所以用了原生的 echo json_encode() 函数

  • ajaxFileUpload.js
jQuery.extend({
    createUploadIframe: function(id, uri)
    {
        //create frame
        var frameId = 'jUploadFrame' + id;
        var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
        if(window.ActiveXObject)
        {
            if(typeof uri== 'boolean'){
                iframeHtml += ' src="' + 'javascript:false' + '"';

            }
            else if(typeof uri== 'string'){
                iframeHtml += ' src="' + uri + '"';

            }
        }
        iframeHtml += ' />';
        jQuery(iframeHtml).appendTo(document.body);

        return jQuery('#' + frameId).get(0);
    },
    createUploadForm: function(id,fileElementId,data,fileElement)
    {
        //create form
        var formId = 'jUploadForm' + id;
        var fileId = 'jUploadFile' + id;
        var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
        if(data)
        {
            for(var i in data)
            {
                jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
            }
        }
        var oldElement;
        if(fileElement == null)
            oldElement = jQuery('#' + fileElementId);
        else
            oldElement = fileElement;

        var newElement = jQuery(oldElement).clone();
        jQuery(oldElement).attr('id', fileId);
        jQuery(oldElement).before(newElement);
        jQuery(oldElement).appendTo(form);

        //set attributes
        jQuery(form).css('position', 'absolute');
        jQuery(form).css('top', '-1200px');
        jQuery(form).css('left', '-1200px');
        jQuery(form).appendTo('body');
        return form;
    },

    ajaxFileUpload: function(s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout		
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()
        var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data)=='undefined'?false:s.data),s.fileElement);
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = 'jUploadFrame' + id;
        var formId = 'jUploadForm' + id;
        // Watch for a new set of requests
        if ( s.global && ! jQuery.active++ )
        {
            jQuery.event.trigger( "ajaxStart" );
        }
        var requestDone = false;
        // Create the request object
        var xml = {}
        if ( s.global )
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
        var uploadCallback = function(isTimeout)
        {
            var io = document.getElementById(frameId);

            try
            {
                if(io.contentWindow)
                {
                    xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
                    xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;

                }else if(io.contentDocument)
                {
                    xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
                    xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
                }
            }catch(e)
            {
                jQuery.handleError(s, xml, null, e);
            }
            if ( xml || isTimeout == "timeout")
            {
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if ( status != "error" )
                    {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData( xml, s.dataType );
                        // If a local callback was specified, fire it and pass it the data
                        if ( s.success ){
                            s.success( data, status );
                        }
                        // Fire the global callback
                        if( s.global )
                            jQuery.event.trigger( "ajaxSuccess", [xml, s] );
                    } else
                        jQuery.handleError(s, xml, status);
                } catch(e)
                {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }

                // The request was completed
                if( s.global )
                    jQuery.event.trigger( "ajaxComplete", [xml, s] );

                // Handle the global AJAX counter
                if ( s.global && ! --jQuery.active )
                    jQuery.event.trigger( "ajaxStop" );

                // Process result
                if ( s.complete )
                    s.complete(xml, status);

                jQuery(io).unbind()

                setTimeout(function()
                {	try
                {
                    jQuery(io).remove();
                    jQuery(form).remove();

                } catch(e)
                {
                    jQuery.handleError(s, xml, null, e);
                }

                }, 100)

                xml = null

            }
        }
        // Timeout checker
        if ( s.timeout > 0 )
        {
            setTimeout(function(){
                // Check to see if the request is still happening
                if( !requestDone ) uploadCallback( "timeout" );
            }, s.timeout);
        }
        try
        {

            var form = jQuery('#' + formId);
            jQuery(form).attr('action', s.url);
            jQuery(form).attr('method', 'POST');
            jQuery(form).attr('target', frameId);
            if(form.encoding)
            {
                jQuery(form).attr('encoding', 'multipart/form-data');
            }
            else
            {
                jQuery(form).attr('enctype', 'multipart/form-data');
            }
            jQuery(form).submit();

        } catch(e)
        {
            jQuery.handleError(s, xml, null, e);
        }

        jQuery('#' + frameId).load(uploadCallback);
        return {abort: function(){
            try
            {
                jQuery('#' + frameId).remove();
                jQuery(form).remove();
            }
            catch(e){}
        }};
    },

    uploadHttpData: function( r, type ) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;

        // If the type is "script", eval it in global context
        if ( type == "script" )
            jQuery.globalEval( data );
        // Get the JavaScript object, if JSON is used.
        if ( type == "json" )
            eval( "data = " + data );
        // evaluate scripts within html
        if ( type == "html" )
            jQuery("<div>").html(data).evalScripts();

        return data;
    },

    handleError: function( s, xml, status, e ) {
        // If a local callback was specified, fire it
        if ( s.error )
            s.error( xml, status, e );

        // Fire the global callback
        if ( s.global )
            jQuery.event.trigger( "ajaxError", [xml, s, e] );
    }
});

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