DataGridView 绑定数据源 BindingList<T>

一.绑定数据源 BindingList<T>

1.定义行数据格式

    public class datarow

    {

        public string name{get;set;}

        public bool beman { get; set; }

        public int age { get; set; }

    }

2.创建要绑定的数据BindingList<T>

    BindingList<datarow> datas = new BindingList<datarow>();

    datarow row1 = new datarow();

    row1.name = "name2";

    row1.beman = true;

    row1.age = 12;

 

    datarow row2 = new datarow();

    row2.name = "name3";

    row2.beman = false;

    row2.age = 15;

 

    datarow row3 = new datarow();

    row3.name = "name1";

    row3.beman = false;

    row3.age = 15;

 

    datas.Add(row1);

    datas.Add(row2);

    datas.Add(row3);

 

    this.dataGridView1.DataSource = datas;    

    this.dataGridView1.Refresh();

 

3.获取修改后的数据

    foreach (datarow one in datas)

    {

        MessageBox.Show(one.name.ToString());

    }

二、排序

 

1.使用BindingList<T>的orderby(这个很简单)

this.dataGridView1.DataSource=datas.OrderBy(a => a.name).ToArray();

 

2.声明一个List，将BindingList传入作为构造函数，对List进行排序再将元素添加回BindingList。

 

a.申明list的比较函数

public void SortReportList(ref List<datarow> reportList)

    {

        reportList.Sort(delegate(datarow x, datarow y)

        {

            //First sort by category id, then display order, so report in same category gathered and sorted.

            int result = x.name.CompareTo(y.name);

            if (result == 0)

                return x.age - y.age;

            else

                return result;

        });

    }

b.把BindingList转为list，list排序后，再回存到BindingList

    public void SortReportsByDisplayOrder(ref BindingList<datarow> reportList)

    {

        List<datarow> list = new List<datarow>(reportList);

        SortReportList(ref list);

        reportList.Clear();

        foreach (datarow rpt in list)

        {

            reportList.Add(rpt);

        }

    }

c.在需要排序的地方增加

SortReportsByDisplayOrder(ref datas);