BindingSource应用两例
BindingSource应用两例
一、BindingSource应用(自定义属性)
public partial class Form15 : Form
{
/*
* BindingSource应用(自定义属性)
*/
public Form15()
{
InitializeComponent();
//实例化BindingSource
bs = new BindingSource();
//建立List项
List<TestItem> lstItem = new List<TestItem>();
TestItem item = new TestItem();
item.ItemName = "A";
lstItem.Add(item);
item = new TestItem();
item.ItemName = "B";
lstItem.Add(item);
//绑字bs数据源
bs.DataSource = lstItem;
//建立textBox1,lable1的DataBinding
textBox1.DataBindings.Add(new Binding("Text", bs, "ItemName"));
label1.DataBindings.Add(new Binding("Text", bs, "ItemName"));
}
BindingSource bs = null;
//单击按钮移动bs的Current
private void button1_Click(object sender, EventArgs e)
{
bs.MoveNext();
}
}
public class TestItem
{
public string ItemName
{
get;
set;
}
}
二、BindingSource应用(DataSet/DataTable)
public partial class Form16 : Form
{
/*
*BindingSource应用(DataSet/DataTable)
*
*/
public Form16()
{
InitializeComponent();
//建立DataSet(含dt,dt2)
DataSet ds = new DataSet();
DataTable dt = new DataTable();
dt.TableName = "T1";
dt.Columns.Add("Col1", typeof(int));
dt.Columns.Add("Col2", typeof(string));
DataRow drNew = dt.NewRow();
drNew["Col1"] = 1;
drNew["Col2"] = "AAA";
dt.Rows.Add(drNew);
drNew = dt.NewRow();
drNew["Col1"] = 2;
drNew["Col2"] = "BBB";
dt.Rows.Add(drNew);
DataTable dt2 = new DataTable();
dt2.TableName = "T2";
dt2.Columns.Add("Col1", typeof(int));
dt2.Columns.Add("Col2", typeof(string));
drNew = dt2.NewRow();
drNew["Col1"] = 1;
drNew["Col2"] = "AAA";
dt2.Rows.Add(drNew);
drNew = dt2.NewRow();
drNew["Col1"] = 1;
drNew["Col2"] = "AAB";
dt2.Rows.Add(drNew);
drNew = dt2.NewRow();
drNew["Col1"] = 2;
drNew["Col2"] = "BBB";
dt2.Rows.Add(drNew);
drNew = dt2.NewRow();
drNew["Col1"] = 2;
drNew["Col2"] = "BBC";
dt2.Rows.Add(drNew);
ds.Tables.AddRange(new DataTable[] { dt, dt2 });
//因bs2会受bs的Current切换而改动，故先绑定bs2
BindingSource bs2 = new BindingSource();
bs2.DataSource = ds.Tables["T2"];
gridControl2.DataSource = bs2;
BindingSource bs = new BindingSource();
//bs挂勾事件,切换行事件
bs.CurrentItemChanged += new EventHandler(bs_CurrentItemChanged);
bs.DataSource = ds.Tables["T1"];
gridControl1.DataSource = bs;
}
//bs切换行事件,设定bs2的Filter,从而刷新gridControl2的数据显示
void bs_CurrentItemChanged(object sender, EventArgs e)
{
(gridControl2.DataSource as BindingSource).Filter = "Col1=" + ((sender as BindingSource).Current as DataRowView).Row ["Col1"].ToString();
}
}