VoucherGrid.xaml.cs

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using VoucherGridCtl.Commons;
using System;
using System.Collections.Generic;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using static VoucherGridCtl.Commons.Consts;

namespace VoucherGridCtl
{
    /// <summary>
    /// VoucherGrid.xaml 的交互逻辑
    /// </summary>
    public partial class VoucherGrid : UserControl
    {
        static int MAX_ROWS = 100;
        static int MAX_COLUMNS = 5;

        string[,] m_Controls = new string[MAX_ROWS, MAX_COLUMNS];

        string m_LastFocusControl = "";

        //定义事件参数类
        public class RowChangeEventArgs : EventArgs
        {
            public int OldRowIndex { set; get; }
            public int RowIndex { set; get; }
            /// <summary>
            /// true  焦点返回上一
            /// </summary>
            public bool Cancel { set; get; }
        }
        //定义delegate
        public delegate void RowChangeEventHandler(object sender, RowChangeEventArgs e);
        //用event 关键字声明事件对象
        public event RowChangeEventHandler RowChangeEvent;    

        protected void OnRowChangeEvent(Control sender,int OldRowIndex,int RowIndex) {
            if (RowChangeEvent == null)
                return;
            RowChangeEventArgs args = new RowChangeEventArgs();
            args.OldRowIndex = OldRowIndex;
            args.RowIndex = RowIndex;
            RowChangeEvent(grid, args);
            if (args.Cancel)
            {
                SetLastFocus();
                throw new FinanceAccountControlException(FinanceAccountControlErrorCode.CANCEL);
            }
        }

        public VoucherGrid()
        {            
            InitializeComponent();           
        }

        List<VoucherGridItem> m_DataSource = new List<VoucherGridItem>();
        public List<VoucherGridItem> DataSource { get { HoldDataSource(); return m_DataSource; } set { m_DataSource = value; } }

        public int CurrentRowIndex { set; get; } = -1;