易忘记代码记录

1、C# Split分割字符串的方法使用

if (!string.IsNullOrEmpty(query.SchoolTime))
{
    var arr = string.Join(",", query.SchoolTime.Split(new char[]{'-'}, StringSplitOptions.RemoveEmptyEntries).Select(c=>string.Format("'{0}'",c.Trim())));
    searchSql += string.Format(" and c.Grade in({0})",arr);
}

var tasknotifiIds = string.Join(",", result.Data.Select(v => string.Format("'{0}'", v.Id)));

2、jQuery序列化表单数据
serialize()、serializeArray()方法都是jQuery用户序列化表单的，用于ajax提交的data值的序列化
var dataParam = $("#updateChannelForm").serializeArray();
例如我想添加sex="男"
dataParam.push({"name":"sex","value":"男"}) 就可以了
我们看到serialize()方法把表单里的内容序列化成了字符串
"id=58&channelType=2&subTitle=591teststetets&extAttrValueId=599"

那么我们只需这要添加额外的内容：
var dataParam = $("#updateChannelForm").serialize();
例如我想添加sex="男"
dataParam =dataParam +"&"+"sex=男"
参考出处：http://blog.csdn.net/csdnzhangtao5/article/details/52981541

var formData = $form.serialize();
formData += '[email protected][email protected]';
formData = formData.replace(/\+/g, " ");  //jquery的serialize将空格变成了+，替换回来

3、jQuery closest() 方法获得匹配选择器的第一个祖先元素，从当前元素开始沿 DOM 树向上。

$(document).bind("click", function( e ) {
    $( e.target ).closest("li").toggleClass("hilight");
});

4、Dynamic动态参数

dynamic param = new ExpandoObject();
            param.StudentId = studentId;

            if (!string.IsNullOrEmpty(courseId))
            {
                sql += " and b.CourseId=@CourseId";
                param.CourseId = courseId;
            }
            var model = await _baseService.GetList(sql, param);
            return model;

5、处理input type="number"输入e的问题，及maxlength不起作用

 分

function handleScore(obj, len) {  //处理数字输入
            //if (obj.value) {obj.value = obj.value.replace(/[^0-9]/, ""); }
            if (obj.value.length > len) { obj.value = obj.value.slice(0, len); }
            if (obj.value < 0) { obj.value = 0; }
        }

6、基于声明的登录和退出
http://www.cnblogs.com/dudu/p/6367303.html

var identity = new ClaimsIdentity(DefaultAuthenticationTypes.ApplicationCookie);
identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, user.Id));
identity.AddClaim(new Claim(ClaimTypes.Name, user.UserName));
identity.AddClaim(new Claim(ClaimTypes.Sid, school.Id));
AuthenticationManager.SignOut(DefaultAuthenticationTypes.ApplicationCookie);
AuthenticationManager.SignIn(new AuthenticationProperties { IsPersistent = model.RememberMe }, identity);

//退出
AuthenticationManager.SignOut(DefaultAuthenticationTypes.ApplicationCookie);
return RedirectToAction("Login", "Account");

/*
IList claimCollection = new List
            {
                new Claim(ClaimTypes.Name, "Andras")
                , new Claim(ClaimTypes.Country, "Sweden")
                , new Claim(ClaimTypes.Gender, "M")
                , new Claim(ClaimTypes.Surname, "Nemes")
                , new Claim(ClaimTypes.Email, "[email protected]")
                , new Claim(ClaimTypes.Role, "IT")
            };
 
            ClaimsIdentity claimsIdentity = new ClaimsIdentity(claimCollection, "My e-commerce website");
 
            //Console.WriteLine(claimsIdentity.IsAuthenticated);
 
            ClaimsPrincipal principal = new ClaimsPrincipal(claimsIdentity);
            Thread.CurrentPrincipal = principal;
            //actionContext.RequestContext.Principal = principal;
*/

7、基于Forms身份验证的关键代码：
Web.Config配置

/// 

        /// 验证后台用户名和密码
        /// 
        /// 
        /// 
        /// 
        [AllowAnonymous]
        public ActionResult LoginValidate(string UserName, string UserPwd)
        {
            BackResult backResult;
            string md5Pwd = UserPwd.MD5();   //MD5加密后的密码
            MS.Model.SysUser user = new SysUser_BLL().LoginValidate(UserName, md5Pwd);
            if (user != null)
            {
                //为提供的用户名提供一个身份验证的票据
                FormsAuthentication.SetAuthCookie(UserName, true, FormsAuthentication.FormsCookiePath);
                //把用户对象保存在票据里
                string userData = JsonConvert.SerializeObject(user);
                FormsAuthenticationTicket Ticket = new FormsAuthenticationTicket(1, UserName, DateTime.Now, DateTime.Now.AddTicks(FormsAuthentication.Timeout.Ticks), false, userData);
                //加密票据
                string hashTicket = FormsAuthentication.Encrypt(Ticket);
                HttpCookie userCookie = new HttpCookie(FormsAuthentication.FormsCookieName, hashTicket);
                Response.Cookies.Add(userCookie);

                //登录成功之后，改写用户的最后一次登录时间及增加登录次数
                new SysUser_BLL().ModifyLoginInfo(user);

                string loginIP = Util.ClientIP;
                LogHelper.WriteOpLog(new SysLog { OpTit = "登录", Operator = UserName, OpPage = "登录页面", OpTime = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"), OpType = OpType.登录, OpIP= loginIP });

                backResult = new BackResult { status = 100, msg = "通过身份验证！" };
            }
            else
            {
                backResult = new BackResult { status = 200, msg = "用户名或密码不正确！" };
            }
            return Json(backResult, JsonRequestBehavior.AllowGet);
        }
        [AllowAnonymous]
        public void LogOut()   //退出登录
        {
            FormsAuthentication.SignOut();
        }

BaseController

[Authorize]
    public class BaseController : Controller
    {
        public string LoginUser
        {
            get
            {
                HttpCookie authCookie = HttpContext.Request.Cookies[FormsAuthentication.FormsCookieName];//获取cookie 
                if (authCookie != null)
                {
                    FormsAuthenticationTicket Ticket = FormsAuthentication.Decrypt(authCookie.Value);//解密 
                    MS.Model.SysUser loginUser = JsonConvert.DeserializeObject(Ticket.UserData);//反序列化

                    return loginUser;
                }
                else
                {
                    return null;
                }
            }
        }
        protected override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            //获取区域
            var area = filterContext.RouteData.DataTokens;//MVC可以有区域的，这里就是负责存放区域的

            //获取区域名称
            var areaName = area["area"];//这个["area"]是写死了的。你根据["area"]就可以取到区域名称，因为区域的key固定就是area

            string controllerName = (string)filterContext.RouteData.Values["controller"];  //控制器名称
            string actionName = (string)filterContext.RouteData.Values["action"]; //Action方法名称

            //TODO:根据用户所属的角色，用户权限判断用户是否具有访问这个 区域下controller的action方法
        }
    }

8、Html拼接时正则替换，免得每次手敲

(.+) -> html+='$0';

Paste_Image.png

9、WebForm中的文件下载

string fileName = lb_file.Text;//客户端保存的文件名
            string filePath = Server.MapPath("~/Report/" + fileName);//路径
            if (!File.Exists(filePath))
            {
                MessageBox.Show(this, "文件已经删除!无法下载!"); return;
            }
            //以字符流的形式下载文件
            var fs = new FileStream(filePath, FileMode.Open);
            var bytes = new byte[(int)fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            fs.Close();
            Response.ContentType = "application/octet-stream";
            //通知浏览器下载文件而不是打开
            Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, Encoding.UTF8));
            Response.BinaryWrite(bytes);
            Response.Flush();
            Response.End();

MVC文件下载：http://www.cnblogs.com/insus/p/3615714.html

10、阻止浏览器按F5刷新页面

$(document).keydown(function (e) {
                if (e.keyCode === 116) {
                    layer.confirm('如果您正在上传资料请不要刷新当前页', {
                        btn: ['确定刷新', '取消'] //按钮
                    }, function () {
                        window.location.reload();
                    });
                    return false;
                }
            });
//原生js写法
document.onkeydown = function (e) {
            var ev = window.event || e;
            var code = ev.keyCode || ev.which;
            if (code == 116) {
                return false;
            }
        }

11、select下拉框设置了multiple时，变成了多行展示，撑高了原有的展示区域
解决方式，再加上 size="1"

    爱好:
    
      看书
      旅游
      运动
      购物
    

12、zTree树

function loadTreeData(url, key, selectNodeId) {
    $.post(url, { key: key }, function (data) {
        if (data && data.Tree) {
            $("span[name='SchoolIndicator']").text(data.SchoolIndicator);
            $("span[name='MajorIndicator']").text(data.MajorIndicator);
            bindTree(data.Tree, selectNodeId);
        }
    });
}

function bindTree(data, selectNodeId) {
    var zTree = $.fn.zTree.init($("#treeDemo"), setting, data);
    if (data.length > 0) {
        var nodes = zTree.getNodes();
        var node = getChildren(nodes[0]);
        if (selectNodeId) {
            node = zTree.getNodeByParam('Id', selectNodeId);
        }
        if (node) {
            if ($.trim($("#indicatorKey").val()) === "") {
                zTree.expandNode(node);
            } else {
                zTree.expandAll(true);
            }
            zTree.selectNode(node);
            treeNodeSelected(node);
        }
        setTimeout("$('.scroll-pane').jScrollPane()", 150);
    } else {
        resetStyle();
    }
}

///获取第一个叶子节点
function getChildren(treeNode) {
    var childrenNodes = treeNode.children;
    if (childrenNodes) {
        return getChildren(treeNode.children[0]);
    } else {
        return treeNode;
    }
}

function treeNodeSelected(node) {
    selectedNode = node;
    setButtonStyle(node);
    if (node.isParent) {
        loadCatalogData(node);
    } else {
        loadContentData(node);
    }
}

function getPath(node) {
    var paths = [];
    while (node != null) {
        paths.push(node.IndicatorName);
        node = node.getParentNode();
    }
    var strPath = paths.reverse().join(">>");
    //if (strPath.length > 70) {
    //    strPath = strPath.substr(0, 70) + '...';
    //}
    return strPath;
}

用while过滤掉没有叶子节点的父级

public async Task> GetMajorTreeNew(string key,bool parentNodeNoCheck = true)
        {
            var orgList = (await _organizationService.GetAllOrgnization()).ToList();
            var majorList = (await _majorService.GetAllList()).ToList();

            if (orgList.Count > 0 && majorList.Count > 0)
            {
                Dictionary hasChildrenDic=new Dictionary();  //有叶子节点的父级
                var distinctParents = majorList.Where(c=>c.OrganizationId.Trim().Length>0).Select(c => c.OrganizationId).Distinct().ToList();
                
                for (int i = 0; i < distinctParents.Count(); i++)
                {
                    var node = orgList.FirstOrDefault(c => c.Id == distinctParents[i]);
                    if (node == null) continue;
                    hasChildrenDic.Add(distinctParents[i],node);

                    Organization tempOrg = orgList.FirstOrDefault(c=>c.Id==node.ParentId);
                    if (tempOrg != null)
                    {
                        while (tempOrg != null && tempOrg.Id.Length>1)
                        {
                            if (!hasChildrenDic.ContainsKey(tempOrg.Id))
                            {
                                hasChildrenDic.Add(tempOrg.Id, tempOrg);
                                tempOrg = orgList.FirstOrDefault(c => c.Id == tempOrg.ParentId);
                            }
                            else
                            {
                                tempOrg = null;
                            }
                        }
                    }
                }
                var itreeList = hasChildrenDic.Select(ic => new SelectTreeModel
                {
                    Id = ic.Value.Id,
                    Pid = ic.Value.ParentId,
                    name = ic.Value.OrgName,
                    isParent = true,
                    nocheck = parentNodeNoCheck,
                    Open = true,
                    Sort = ic.Value.Sort
                }).ToList();

                itreeList.AddRange(from v in majorList
                                   where orgList.FirstOrDefault(d => d.Id == v.OrganizationId) != null
                                   select new SelectTreeModel()
                                   {
                                       Id = v.Id,
                                       Pid = v.OrganizationId,
                                       name = v.MajorName,
                                       nocheck = false,
                                       isParent = false,
                                       Open = true,
                                       Sort = 10000
                                   });

                var result = GetSelectTree(itreeList, key);
                return result.OrderBy(d => d.Sort).ToList();
            }
            return null;
        }

13、C#扩展方法 GroupBy

//先对老师学期内的月数据分组求和
var grouped = details.GroupBy(o => new { o.OrgName, o.EmployeeId }).Select(g => new
                {
                    g.Key.OrgName,
                    totalHour = g.Sum(c => c.ConfirmClassHour)
                }).GroupBy(c => c.OrgName).ToDictionary(o => o.Key, o => o.Count(c => c.totalHour < 150));


query.GroupBy(q => new { q.Year, q.Month })  
    .Select(q => new  
    {  
        Year = q.Key.Year,  
        Month = q.Key.Month,  
        BuildAmount = q.Sum(i => i.BuildAmount),  
        RecAmount = q.Sum(i => i.RecAmount),  
        Amount = q.Sum(i => i.Amount),  
        RealAmount = q.Sum(i => i.RealAmount)  
    }); 

//Linq方式
var query = from l in list    
            group l by new { l.Name, l.BatNum } into g    
            select new    
            {    
                Name = g.Key.Name,    
                Count = g.Sum(a => a.Count),    
                BatNum = g.Key.BatNum    
            }; 

Dictionary buildList = _build.FindList().GroupBy(q => q.SaleCode)  
        .Select(q => new { Code = q.Key, ReaAmount = q.Sum(i => i.RealAmount) })  
        .ToDictionary(q => q.Code, q => q.ReaAmount); 

14、JsonConvert格式化日期格式

var tables = details.OrderByDescending(o => o.AccidentTime).ToList();
 return JsonConvert.SerializeObject(tables,new IsoDateTimeConverter(){DateTimeFormat = "yyyy-MM-dd"});