坑:FirstOrDefault(p => p.GroupStartDateTime < DateTime.Now)生成sql是[g].[GroupStartDateTime] < GETDATE()

博客指出MyBatis生成的SQL中使用GETDATE()获取SQL服务器时间。若SQL服务器与网站服务器时间不一致,会导致判断不成立,如使用_groupStartDateTime < DateTime.Now生成的SQL判断就可能出现问题。

_repository.FirstOrDefault(p => p.GroupStartDateTime < DateTime.Now);

生成的sql居然是[g].[GroupStartDateTime] < GETDATE()

GETDATE()取得是sql服务器的时间,

如果sql服务器时间准还好,赶上sql服务器与网站服务器时间不一致,就会出现判断不成立的情况。

public class OrganizationStructureController : Controller { AoutEntities db = new AoutEntities(); ReturnListJsonData jsonData = new ReturnListJsonData(); public ActionResult Index() { return View(); } #region 模糊查询 public ActionResult GetList(int page, int limit, string name, string code) { var list = db.OrganizationStructure.Where(a => a.IsDel == false).ToList(); if (!string.IsNullOrEmpty(name)) { list = list.Where(a => a.OrgName.Contains(name)).ToList(); } if (!string.IsNullOrEmpty(code)) { list = list.Where(a => a.OrgCode.Contains(code)).ToList(); } var offset = (page - 1) * limit; var data = list.OrderByDescending(a => a.ModifyDate).Skip(offset).Take(limit); jsonData.code = 0; jsonData.count = list.Count; jsonData.data = data; jsonData.msg = "success"; return Json(jsonData, JsonRequestBehavior.AllowGet); } #endregion #region 添加组织机构 [HttpPost] public ActionResult Add(OrganizationStructure org) { try { org.ID = Guid.NewGuid(); org.IsDel = false; org.CreateDate = DateTime.Now; org.ModifyDate = DateTime.Now; db.OrganizationStructure.Add(org); db.SaveChanges(); jsonData.code = 0; jsonData.msg = "添加成功"; } catch (Exception ex) { jsonData.code = 1; jsonData.msg = ex.Message; } return Json(jsonData); } #endregion #region 更新组织机构 [HttpPost] public ActionResult Update(OrganizationStructure org) { try { var model = db.OrganizationStructure.FirstOrDefault(a => a.ID == org.ID && a.IsDel == false); if (model != null) { model.OrgName = org.OrgName; model.OrgCode = org.OrgCode; model.Leve = org.Leve; model.ParentId = org.ParentId; model.ModifyDate = DateTime.Now; db.SaveChanges(); jsonData.code = 0; jsonData.msg = "更新成功"; } else { jsonData.code = 1; jsonData.msg = "未找到该组织机构"; } } catch (Exception ex) { jsonData.code = 1; jsonData.msg = ex.Message; } return Json(jsonData); } #endregion #region 删除组织机构(软删除) [HttpPost] public ActionResult Delete(Guid ID) { try { var model = db.OrganizationStructure.FirstOrDefault(a => a.ID == ID && a.IsDel == false); if (model != null) { model.IsDel = true; db.SaveChanges(); jsonData.code = 0; jsonData.msg = "删除成功"; } else { jsonData.code = 1; jsonData.msg = "未找到该组织机构"; } } catch (Exception ex) { jsonData.code = 1; jsonData.msg = ex.Message; } return Json(jsonData); } #endregion } 前端页面: @{ Layout = null; } <!DOCTYPE html> <html> <head> <link href="~/Scripts/layui/css/layui.css" rel="stylesheet" /> <script src="~/Scripts/layui/layui.js"></script> <script src="~/Scripts/jquery-3.4.1.js"></script> <style> body { padding: 10px 20px 20px 20px; width: 90% } .but { margin-top: -5px } </style> </head> <body> <fieldset class="layui-elem-field"> <legend> <span class="layui-breadcrumb"> <a href="">首页</a> <a href="">组织机构管理</a> </span> </legend> <div class="layui-field-box"> <div class="layui-form-item"> <div class="layui-inline"> <label class="layui-form-label">机构名称</label> <div class="layui-input-block"> <input type="text" name="name" id="name" autocomplete="off" class="layui-input"> </div> </div> <div class="layui-inline"> <label class="layui-form-label">机构代码</label> <div class="layui-input-inline"> <input type="text" name="code" id="code" autocomplete="off" class="layui-input"> </div> </div> <button type="button" class="layui-btn layui-btn-radius but" id="searchButton" onclick="Search()"><i class="layui-icon layui-icon-search"></i>查询</button> <button type="button" class="layui-btn layui-bg-blue but" onclick="AddOrg()"><i class="layui-icon layui-icon-addition"></i>添加</button> </div> </div> </fieldset> <fieldset class="layui-elem-field"> <table class="layui-hide" id="test" lay-filter="test"></table> <script type="text/html" id="toolDemo"> <div class="layui-clear-space"> <a class="layui-btn layui-btn-xs" lay-event="edit" id="Edit"><i class="layui-icon layui-icon-edit"></i>编辑</a> <a class="layui-btn layui-btn-xs layui-bg-orange" lay-event="del" id="del"><i class="layui-icon layui-icon-clear"></i>删除</a> </div> </script> </fieldset> <script> var tableIns; layui.use(['table', 'layer', 'form'], function () { var table = layui.table; var layer = layui.layer; // 创建渲染实例 tableIns = table.render({ elem: '#test', url: '/OrganizationStructure/GetList', page: true, cols: [[ { type: 'numbers', width: '15%', title: '序列号' }, { field: 'OrgName', width: '20%', title: '机构名称' }, { field: 'OrgCode', width: '20%', title: '机构代码' }, { field: 'Leve', width: '10%', title: '级别' }, { field: 'ParentId', width: '15%', title: '父节点ID' }, { field: 'ModifyDate', width: '20%', title: '修改时间', templet: function (d) { return formatDate(d.ModifyDate); } }, { title: '操作', width: '25%', templet: '#toolDemo' } ]], }); // 编辑删除事件 table.on('tool(test)', function (obj) { var data = obj.data; if (obj.event === 'edit') { EditOrg(data); } else if (obj.event === 'del') { DeleteOrg(data, obj); } }); }); function formatDate(dateStr) { if (!dateStr) return ''; var timestamp = parseInt(dateStr.replace(/\/Date$(\d+)$\//, '$1')); var date = new Date(timestamp); return date.getFullYear() + '-' + ('0' + (date.getMonth() + 1)).slice(-2) + '-' + ('0' + date.getDate()).slice(-2); } // 添加组织机构弹窗 function AddOrg() { layer.open({ type: 1, title: '添加组织机构', content: ` <div style="padding:20px"> <div class="layui-form-item"> <label class="layui-form-label">机构名称</label> <div class="layui-input-block"> <input type="text" id="add_name" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">机构代码</label> <div class="layui-input-block"> <input type="text" id="add_code" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">级别</label> <div class="layui-input-block"> <input type="number" id="add_leve" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">父节点ID</label> <div class="layui-input-block"> <input type="text" id="add_parentId" class="layui-input"> </div> </div> </div> `, btn: ['保存', '取消'], yes: function (index) { $.post('/OrganizationStructure/Add', { OrgName: $('#add_name').val(), OrgCode: $('#add_code').val(), Leve: $('#add_leve').val(), ParentId: $('#add_parentId').val() }, function (res) { if (res.code == 0) { layer.close(index); Search(); // 刷新列表 } else { layer.msg('操作失败:' + res.msg); } }); } }); } // 编辑组织机构弹窗 function EditOrg(data) { layer.open({ type: 1, title: '编辑组织机构', content: ` <div style="padding:20px"> <div class="layui-form-item"> <label class="layui-form-label">机构名称</label> <div class="layui-input-block"> <input type="text" id="edit_name" value="${data.OrgName}" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">机构代码</label> <div class="layui-input-block"> <input type="text" id="edit_code" value="${data.OrgCode}" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">级别</label> <div class="layui-input-block"> <input type="number" id="edit_leve" value="${data.Leve}" class="layui-input"> </div> </div> <div class="layui-form-item"> <label class="layui-form-label">父节点ID</label> <div class="layui-input-block"> <input type="text" id="edit_parentId" value="${data.ParentId}" class="layui-input"> </div> </div> </div> `, btn: ['更新', '取消'], yes: function (index) { $.post('/OrganizationStructure/Update', { ID: data.ID, OrgName: $('#edit_name').val(), OrgCode: $('#edit_code').val(), Leve: $('#edit_leve').val(), ParentId: $('#edit_parentId').val() }, function (res) { if (res.code == 0) { layer.close(index); Search(); } else { layer.msg('更新失败:' + res.msg); } }); } }); } // 删除组织机构 function DeleteOrg(data, obj) { layer.confirm('真的删除行 [' + data.OrgName + '] 么', function (index) { $.post('/OrganizationStructure/Delete', { ID: data.ID }, function (res) { if (res.code == 0) { obj.del(); layer.close(index); } else { layer.msg('删除失败:' + res.msg); } }); }); } // 查询重载 function Search() { var nameVal = $('input[name="name"]').val().trim(); var codeVal = $('input[name="code"]').val().trim(); tableIns.reload({ where: { name: nameVal, code: codeVal }, page: { curr: 1 } // 重置分页 }); } </script> </body> </html> 帮我整理这两个
07-11
using System; using System.Data; using System.Data.SqlClient; using System.Linq; using System.Web; using System.Web.UI; using System.Web.Configuration; namespace WebApplication1 { public partial class WebForm3 : System.Web.UI.Page { private int currentProductId; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { if (!ValidateRequestParameters()) { Response.Redirect("~/Default.aspx"); return; } LoadProductDetails(currentProductId); LoadRelatedProducts(currentProductId); LogPageVisit(currentProductId); } } /// <summary> /// 验证请求参数并获取商品ID /// </summary> private bool ValidateRequestParameters() { if (!int.TryParse(Request.QueryString["id"], out currentProductId)) { ShowErrorMessage("无效的商品ID参数"); return false; } if (currentProductId <= 0) { ShowErrorMessage("商品ID必须为正整数"); return false; } return true; } /// <summary> /// 加载商品详情 /// </summary> private void LoadProductDetails(int productId) { string connString = GetConnectionString(); if (string.IsNullOrEmpty(connString)) { ShowErrorMessage("数据库连接配置错误"); return; } try { using (var conn = new SqlConnection(connString)) { // 获取商品基本信息和图片 string query = @" SELECT p.ProductID, p.ProductName, p.Subtitle, p.Description, p.Price, p.DiscountPrice, p.StockQuantity, p.CategoryID, p.Rating, p.ReviewCount, c.CategoryName, pi.ImagePath, STRING_AGG(pv.VariantName, ', ') AS AvailableVariants FROM Products p INNER JOIN Categories c ON p.CategoryID = c.CategoryID LEFT JOIN ProductImages pi ON p.ProductID = pi.ProductID AND pi.IsDefault = 1 LEFT JOIN ProductVariants pv ON p.ProductID = pv.ProductID WHERE p.ProductID = @ProductID GROUP BY p.ProductID, p.ProductName, p.Subtitle, p.Description, p.Price, p.DiscountPrice, p.StockQuantity, p.CategoryID, p.Rating, p.ReviewCount, c.CategoryName, pi.ImagePath"; using (var cmd = new SqlCommand(query, conn)) { cmd.Parameters.AddWithValue("@ProductID", productId); conn.Open(); using (SqlDataReader reader = cmd.ExecuteReader()) { if (reader.Read()) { DisplayProductDetails(reader); productContainer.Visible = true; } else { ShowErrorMessage("找不到指定的商品"); } } } } } catch (SqlException sqlEx) { LogError($"SQL错误: {sqlEx.Message}", sqlEx); ShowErrorMessage("数据库连接错误,请稍后再试"); } catch (Exception ex) { LogError($"加载商品信息失败: {ex.Message}", ex); ShowErrorMessage("加载商品信息时出错"); } } /// <summary> /// 显示商品详情到页面控件 /// </summary> private void DisplayProductDetails(SqlDataReader reader) { // 基本信息 ltProductName.Text = HttpUtility.HtmlEncode(reader["ProductName"].ToString()); ltSubtitle.Text = HttpUtility.HtmlEncode(reader["Subtitle"].ToString()); ltCategory.Text = HttpUtility.HtmlEncode(reader["CategoryName"].ToString()); // 价格 decimal price = Convert.ToDecimal(reader["Price"]); ltPrice.Text = price.ToString("C"); if (!Convert.IsDBNull(reader["DiscountPrice"]) && price > Convert.ToDecimal(reader["DiscountPrice"])) { ltDiscountPrice.Text = Convert.ToDecimal(reader["DiscountPrice"]).ToString("C"); } // 库存 int stock = Convert.ToInt32(reader["StockQuantity"]); ltStock.Text = stock.ToString(); ltStockStatus.Text = stock > 0 ? "<span class='text-success'><i class='bi bi-check-circle'></i>有货</span>" : "<span class='text-danger'><i class='bi bi-x-circle'></i>缺货</span>"; // 评分 decimal rating = Convert.ToDecimal(reader["Rating"]); ltRating.Text = GenerateRatingStars(rating); ltReviewCount.Text = reader["ReviewCount"].ToString(); // 图片 string imagePath = reader["ImagePath"]?.ToString() ?? ""; imgProduct.ImageUrl = !string.IsNullOrEmpty(imagePath) ? imagePath : "~/Images/default-product.jpg"; // 描述 ltDescription.Text = HttpUtility.HtmlEncode(reader["Description"].ToString()); // 商品型号 if (!reader.IsDBNull(reader.GetOrdinal("AvailableVariants"))) { ltAvailableVariants.Text = reader["AvailableVariants"].ToString(); } } /// <summary> /// 生成评分星星HTML /// </summary> private string GenerateRatingStars(decimal rating) { int fullStars = (int)rating; bool hasHalfStar = (rating - fullStars) >= 0.5M; int emptyStars = 5 - fullStars - (hasHalfStar ? 1 : 0); return $@" {string.Concat(Enumerable.Repeat("<i class='bi bi-star-fill text-warning'></i>", fullStars))} {(hasHalfStar ? "<i class='bi bi-star-half text-warning'></i>" : "")} {string.Concat(Enumerable.Repeat("<i class='bi bi-star text-warning'></i>", emptyStars))} <span class='ms-2'>{rating:F1}</span>"; } /// <summary> /// 加载相关商品 /// </summary> private void LoadRelatedProducts(int productId) { string connString = GetConnectionString(); if (string.IsNullOrEmpty(connString)) return; try { using (var conn = new SqlConnection(connString)) { // 获取同类别的前4个相关商品 string query = @" SELECT TOP 4 p.ProductID, p.ProductName, p.Price, pi.ImagePath FROM Products p INNER JOIN Categories c ON p.CategoryID = c.CategoryID CROSS APPLY ( SELECT TOP 1 ImagePath FROM ProductImages WHERE ProductID = p.ProductID ORDER BY IsDefault DESC ) pi WHERE p.CategoryID = ( SELECT CategoryID FROM Products WHERE ProductID = @ProductID ) AND p.ProductID <> @ProductID ORDER BY NEWID()"; using (var cmd = new SqlCommand(query, conn)) { cmd.Parameters.AddWithValue("@ProductID", productId); conn.Open(); rptRelatedProducts.DataSource = cmd.ExecuteReader(); rptRelatedProducts.DataBind(); } } } catch (Exception ex) { LogError($"加载相关商品失败: {ex.Message}", ex); } } /// <summary> /// 添加到购物车按钮点击事件 /// </summary> protected void btnAddToCart_Click(object sender, EventArgs e) { if (!ValidateRequestParameters()) return; try { // 获取用户选择的型号 string variant = Request.Form["product_variant"]; // 获取数量 int quantity; if (!int.TryParse(txtQuantity.Value, out quantity) || quantity < 1) { quantity = 1; } // 添加到购物车 Cart cart = GetOrCreateCart(); cart.AddItem(currentProductId, quantity, variant); // 更新购物车数量显示 UpdateCartBadge(cart.TotalItems); // 显示成功消息 ClientScript.RegisterStartupScript(GetType(), "AddToCartSuccess", "showToast('success', '商品已添加到购物车!');", true); } catch (Exception ex) { LogError($"添加到购物车失败: {ex.Message}", ex); ClientScript.RegisterStartupScript(GetType(), "AddToCartError", "showToast('error', '添加到购物车失败,请重试');", true); } } /// <summary> /// 记录页面访问 /// </summary> private void LogPageVisit(int productId) { try { string connString = GetConnectionString(); using (var conn = new SqlConnection(connString)) { string query = @" INSERT INTO ProductVisits (ProductID, UserIP, VisitDate) VALUES (@ProductID, @UserIP, GETDATE())"; using (var cmd = new SqlCommand(query, conn)) { cmd.Parameters.AddWithValue("@ProductID", productId); cmd.Parameters.AddWithValue("@UserIP", GetUserIP()); conn.Open(); cmd.ExecuteNonQuery(); } } } catch { // 访问日志记录失败不影响主流程 } } /// <summary> /// 获取或创建用户购物车 /// </summary> private Cart GetOrCreateCart() { Cart cart = Session["ShoppingCart"] as Cart; if (cart == null) { cart = new Cart(); Session["ShoppingCart"] = cart; } return cart; } /// <summary> /// 更新页面购物车徽章显示 /// </summary> private void UpdateCartBadge(int count) { // 查找母版页中的购物车徽章 var cartBadge = Master?.FindControl("cartBadge") as System.Web.UI.HtmlControls.HtmlGenericControl; if (cartBadge != null) { cartBadge.InnerText = count.ToString(); cartBadge.Visible = count > 0; } } /// <summary> /// 获取数据库连接字符串 /// </summary> private string GetConnectionString() { return WebConfigurationManager.ConnectionStrings["DB-NetShopsConnectionString"]?.ConnectionString; } /// <summary> /// 获取用户IP地址 /// </summary> private string GetUserIP() { string ip = Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (string.IsNullOrEmpty(ip)) { ip = Request.ServerVariables["REMOTE_ADDR"]; } else { string[] addresses = ip.Split(','); if (addresses.Length != 0) { return addresses[0]; } } return ip; } /// <summary> /// 显示错误消息 /// </summary> private void ShowErrorMessage(string message) { if (ltErrorMessage != null) { ltErrorMessage.Text = $"<div class='alert alert-danger'>{HttpUtility.HtmlEncode(message)}</div>"; ltErrorMessage.Visible = true; productContainer.Visible = false; } } /// <summary> /// 记录错误日志 /// </summary> private void LogError(string message, Exception ex) { // 实际项目中应使用日志框架(如log4net/NLog) System.Diagnostics.Debug.WriteLine($"{message}\n{ex}"); // 也可以保存到数据库或文件 try { string logMessage = $"[{DateTime.Now}] {message}\nException: {ex}\n\n"; System.IO.File.AppendAllText(Server.MapPath("~/App_Data/error.log"), logMessage); } catch { // 文件记录失败时不中断 } } } /// <summary> /// 购物车项 /// </summary> public class CartItem { public int ProductId { get; set; } public int Quantity { get; set; } public string Variant { get; set; } public DateTime AddedTime { get; set; } = DateTime.Now; } /// <summary> /// 购物车类 /// </summary> public class Cart { public List<CartItem> Items { get; } = new List<CartItem>(); public int TotalItems => Items.Sum(item => item.Quantity); public decimal TotalPrice { get { // 实际项目中应从数据库获取当前价格 return 0; // 简化为0 } } /// <summary> /// 添加商品到购物车 /// </summary> public void AddItem(int productId, int quantity, string variant = "") { var existingItem = Items.FirstOrDefault(i => i.ProductId == productId && i.Variant == variant); if (existingItem != null) { existingItem.Quantity += quantity; } else { Items.Add(new CartItem { ProductId = productId, Quantity = quantity, Variant = variant }); } } /// <summary> /// 从购物车移除商品 /// </summary> public void RemoveItem(int productId, string variant = "") { var itemToRemove = Items.FirstOrDefault(i => i.ProductId == productId && i.Variant == variant); if (itemToRemove != null) { Items.Remove(itemToRemove); } } /// <summary> /// 清空购物车 /// </summary> public void Clear() { Items.Clear(); } } } 根据后端代码更新数据库代码,使网页能够正常运行
06-12
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