如何在 parent c# dataTreeListView 中显示 chid 值的总和

Question

我可以知道如何在 c# dataTreeListView

中显示 parent 中 child 的总和吗

我分享了一个屏幕截图

我想知道如何向 A 显示 5000，它是 child table 和 parent table 的总和任何人都可以帮助我

我想在 c# object listview

上执行此操作

我为了爬上树所做的是

在表单加载时我写了这段代码

List<Class1> list = new List<Class1>();
                list = Class1.GetList();
                this.dataTreeListView2.ParentKeyAspectName = "ParentId";
                this.dataTreeListView2.RootKeyValueString = "1";
                BrightIdeasSoftware.OLVColumn col = new BrightIdeasSoftware.OLVColumn();
                col.Width = 10;
                dataTreeListView2.DataSource = list;
                foreach (ColumnHeader column in this.dataTreeListView2.Columns)
                {
                    column.Width = 100 + 100+ this.dataTreeListView2.SmallImageSize.Width;
                }
                this.dataTreeListView2.Columns.RemoveByKey("Id");
                this.dataTreeListView2.Columns.RemoveByKey("ParentId");

和

class1.cs 文件有

namespace bbcon_accout_software
{
    class Class1
    {
        /*public string Name { get; set;}
        public Double Value { get; set; }
        public List<Double> Children {get; set;}*/
        protected string xName;
        protected string xId;
        protected string xParentId;
        protected decimal xcredit;
        protected decimal xdebit;
        public Class1()
        {
            //Name = name;
            //Value = value;
            //Children = new List<Double>();
            //Children.Add(2);
            //Children.Add(3);
            this.xName = "";
            this.xId = "";
            this.xParentId = "";
            this.xcredit = 0.0M;
            this.xdebit = 0.0M;
        }
        public String Name1
        {
            get { return this.xName; }
            set { this.xName = value; }
        }

        public String Id
        {
            get { return this.xId; }
            set { this.xId = value; }
        }

        public String ParentId
        {
            get { return this.xParentId; }
            set { this.xParentId = value; }
        }

        public Decimal Credit
        {
            get { return this.xcredit; }
            set { this.xcredit = value; }
        }

        public Decimal Debit
        {
            get { return this.xdebit; }
            set { this.xdebit = value; }
        }
        public static List<Class1> GetList()
        {
            List<Class1> oList = new List<Class1>();
            Class1 oClass4 = new Class1();
            oClass4.Name1 = "Person A";
            oClass4.Id = "xyz";
            oClass4.ParentId = "1";
            oClass4.Credit = 1;
            oClass4.Debit = 1000;
            oList.Add(oClass4);
            Class1 oClass1 = new Class1();
            oClass1.Name1 = "Person B";
            oClass1.Id = "ldc";
            oClass1.ParentId = "xyz";
            oClass1.Credit = 1;
            oClass1.Debit = 2000;
            oList.Add(oClass1);
            Class1 oClass2 = new Class1();
            oClass2.Name1 = "Person C";
            oClass2.Id = "ccc";
            oClass2.ParentId = "xyz";
            oClass2.Credit = 1;
            oClass2.Debit = 1000;
            oList.Add(oClass2);
            Class1 oClass5 = new Class1();
            oClass5.Name1 = "Person A";
            oClass5.Id = "mno";
            oClass5.ParentId = "xyz";
            oClass5.Credit = 1;
            oClass5.Debit = 1000;
            oList.Add(oClass5);
            return oList;
        }
    }
}

请帮我做这个

在问题的标签部分我添加了 objectlistview 但我想显示详细信息数据树列表视图

Answer 1

您可以使用 linq 按父级筛选，然后对列表求和，如下所示：

public static float SumChildren(string parentKey){
    return GetList().Where(x => x.ParentId == parentKey).Sum(x => x.Debit)
}

您可能需要切换 return 类型，但我假设 Debit 是小数

根据您的评论，您的代码需要更大的重构。您应该通过一种方法添加数据，并让该方法根据添加的子项更新父项借记值。

但是作为快速破解，您可以只分配父值，但是如果您要为多嵌套树执行此操作，则需要从最深的分支开始并逐步向上。

var parentDebitValue = SumChildren("xyz");
GetList().Where(x => x.Id == "xyz").First().Debit = parentDebitValue;

但实际上你应该重新构建你的程序

如何在 parent c# dataTreeListView 中显示 chid 值的总和

How to show sum of values of chid in parent c# dataTreeListView

c#

winforms

objectlistview