({
    readFile: function (component, helper, file) {
        if (!file) return;
        if (!file.name.match(/\.(csv||CSV)$/)) {
            return alert('only support csv files');
        } else {
            reader = new FileReader();
            reader.onerror = function errorHandler(evt) {
                switch (evt.target.error.code) {
                    case evt.target.error.NOT_FOUND_ERR:
                        alert('File Not Found!');
                        break;
                    case evt.target.error.NOT_READABLE_ERR:
                        alert('File is not readable');
                        break;
                    case evt.target.error.ABORT_ERR:
                        break; // noop
                    default:
                        alert('An error occurred reading this file.');
                };
            }
            reader.onabort = function (e) {
                alert('File read cancelled');
            };
            reader.onloadstart = function (e) {
                var output = '<ui type=\"disc\"><li><strong>' + file.name + '</strong> (' + file.type + ')- ' + file.size + 'bytes, last modified: ' + file.lastModifiedDate.toLocaleDateString() + '</li></ui>';
                component.set("v.filename", file.name);
                component.set("v.TargetFileName", output);
            };
            reader.onload = function (e) {
                var data = e.target.result;
                // data.replace(/\n/,"")
                var allTextLines11 = data.split(/\r/);
                var s = allTextLines11.toString();
                component.set("v.fileContentData", s);
                console.log("file dataqqq" + JSON.stringify(s));
                var allTextLines = data.split(/\r\n|\n/);
                var dataRows = allTextLines.length - 1;
                var headers = allTextLines[0].split(',');
                var numOfRows = component.get("v.NumOfRecords");
                if (dataRows > numOfRows + 1 || dataRows == 1 || dataRows == 0) {
                    alert("File Rows between 1 to " + numOfRows + " .");
                    component.set("v.showMain", true);
                }
                else {
                    var lines = [];
                    var filecontentdata;
                    var content = "<table class=\"table slds-table slds-table--bordered slds-table--cell-buffer\">";
                    content += "<thead><tr class=\"slds-text-title--caps\">";
                    content += '<th scope=\"col"\>' + '行号' + '</th>';
                    for (i = 0; i < headers.length; i++) {
                        content += '<th scope=\"col"\>' + headers[i] + '</th>';
                    }
                    content += "</tr></thead>";
                    for (var i = 1; i < allTextLines.length; i++) {
                        filecontentdata = allTextLines[i].split(',');
                        if (filecontentdata[0] != '') {
                            content += "<tr>";
                            content += "<td>" + i + "</td>";
                            for (var j = 0; j < filecontentdata.length; j++) {
                                content += '<td>' + filecontentdata[j] + '</td>';
                            }
                            content += "</tr>";
                        }
                    }
                    content += "</table>";
                    console.log(content);
                    component.set("v.TableContent", content);
                    component.set("v.showMain", false);
                }
            }
            reader.readAsText(file, 'gb2312');

        }
        var reader = new FileReader();
        reader.onloadend = function () {
        };
        reader.readAsDataURL(file);
    },
    saveRecords: function (component, event, helper) {
        component.set('v.login', true);
        var action = component.get("c.processData");
        var fieldsList = ['Name', 'Phone', 'AccountNumber']; //Please write your code dynamic fields
        action.setParams({
            fileData: component.get("v.fileContentData"),
            sobjectName: 'Account', //Any object
            fields: fieldsList
        });
        action.setCallback(this, function (response) {
            var state = response.getState();
            if (state === "SUCCESS") {
                var res = response.getReturnValue();
                var res1 = '';
                if (res != 'success') {
                    var ress = res.split('=');
                    console.log(ress);
                    for (var i = 0; i < ress.length; i++) {
                        res1 += ress[i].substr(7) + '\n';
                    }
                    console.log("==" + res1);
                    // this.error( "请修改后重新上传");
                    component.set('v.errorMessage', res1 + "请修改后重新上传");
                    this.showErrorToast(component);
                    component.set('v.login', false);
                } else {
                    // this.success('导入成功');
                    component.set('v.successMessage', '导入成功');
                    this.showSuccessToast01(component);
                    component.set("v.showMain", true);
                    component.set('v.login', false);
                }
            }
            else if (state === "INCOMPLETE") {
                component.set('v.login', false);
            }
            else if (state === "ERROR") {
                var errors = response.getError();
                if (errors) {
                    if (errors[0] && errors[0].message) {
                        console.log("Error message: " +
                            errors[0].message);
                        component.set('v.login', false);
                    }
                } else {
                    console.log("Unknown error");
                    component.set('v.login', false);
                }
            }
        });
        $A.enqueueAction(action);

    },
    //弹出 成功提示
    showSuccessToast01: function (component) {
        $A.util.removeClass(component.find('successDiv01'), 'slds-hide');
        window.setTimeout($A.getCallback(function () {
            $A.util.addClass(component.find('successDiv01'), 'slds-hide');
        }),
            3000
        );
    },
    //弹出 错误提示
    showErrorToast: function (component) {
        $A.util.removeClass(component.find('errorDiv'), 'slds-hide');
        window.setTimeout($A.getCallback(function () {
            $A.util.addClass(component.find('errorDiv'), 'slds-hide');
        }),
            4000
        );
    },
    success : function(message) {
        var toastEvent = $A.get("e.force:showToast");
        toastEvent.setParams({
            "title" : "成功!",
            "message" : message,
            "duration" : "5000"
        });
        toastEvent.fire();
    },
    
    warning : function(message) {
        var toastEvent = $A.get("e.force:showToast");
        toastEvent.setParams({
            "title": "警告!",
            "message": message,
            "duration" : "10000"
        });
        toastEvent.fire();
    },
    
    error : function(message) {
        var toastEvent = $A.get("e.force:showToast");
        toastEvent.setParams({
            "title": "错误!",
            "message": message,
            "duration" : "sticky"
        });
        toastEvent.fire();
    },
})