先看效果 实现方法新建一个Point类 1class Point2 {3 4publicdouble X;5publicdouble Y;6publicdouble Z;7public Point(double x, double y, double z)8 {9this.X = x; 10this.Y = y; 11this.Z = z; 12 } 13 }新建一个比较器类 实现IEqualityComparer<Point>接口 1class PointCompare : IEqualityComparer<Point>2 {3privatedouble _tolerance = 0.1;4publicdouble Tolerance { get => _tolerance; set =>...
我正在分析并制作Windows Service应用程序. 进行插入查询时,我使用List< SqlParameter>添加列.和AddRange. 在List< SqlParameter>中pmlist =新列表< SqlParameter>(键);行,其中包含{@DeptCode}. 然后pmlist.AddRange(pms);行,添加了pms参数. 我之前提到的pmslist总线已经具有{@DeptCode},因此pmlist具有这样的值pmlist = [0] {@DeptCode} [1] {@DeptCode} [2] {@DeptName} [3] {@ParentDeptName} [4] {@ParentDeptCode} [5] {@Dep...
我有以下Create() – 我的制造商实体的POST控制器：// POST: INV_Manufacturers/Create // To protect from overposting attacks, please enable the specific properties you want to bind to, for // more details see http://go.microsoft.com/fwlink/?LinkId=317598. [HttpPost] [ValidateAntiForgeryToken] public async Task<ActionResult> Create([Bind(Include = "Id,manufacturer_description,created_date,created_by,m...
这是我的Linqpad示例：void Main() {List<test> test=new List<test>();test.Add(new test("001","2016/10/5","11:00","A1"));test.Add(new test("002","2016/10/5","11:00","A1"));test.Add(new test("003","2016/10/4","11:00","cc")); test.Add(new test("004","2016/10/4","10:00","cc"));test.Add(new test("005","2016/10/3","11:00","cc"));var list=test.GroupBy(x => new { x.BOOKING_DATE, x.PERIOD_NAME,x.BOOKING_TABL...
在将TextBox中的值保存到数据库中之前,我需要检查该值是否已存在于数据库中. 这是TextBox代码：<tr><td><asp:Label ID="lblProductConstruction" runat="server" Text="Product Construction:" Font-Names="Open Sans"></asp:Label></td><td><asp:TextBox ID="txtProductConstruction" runat="server" Font-Names="Merriweather" margin-Left="100px" ></asp:TextBox><br /></td></tr><tr>保存按钮：<input type="button" class="...