用户自定义控件

public partial class BanCiCombox : UserControl
{
string _gong = "";
Ctrl cl = new Ctrl();
public BanCiCombox()
{
InitializeComponent();
}

public BanCiCombox(string gong)
{
InitializeComponent();

_gong = gong;
//DataTable dt = new DataTable();

//dt = cl.GetBanCi(gong);
//comboBox1.Items.Clear();
//comboBox1.Items.Add("");
//for (int i = 0; i < dt.Rows.Count; i++)
//{
// comboBox1.Items.Add(dt.Rows[i]["classcode"].ToString() + "-" + dt.Rows[i]["name"].ToString());
//}
}
public string Gong { get { return _gong; } set { _gong = value; } }

private void BanCiCombox_Load(object sender, EventArgs e)
{

DataTable dt = new DataTable();

dt = cl.GetBanCi(Gong);
comboBox1.Items.Clear();
comboBox1.Items.Add("");
for (int i = 0; i < dt.Rows.Count; i++)
{
comboBox1.Items.Add(dt.Rows[i]["classcode"].ToString()+"-"+dt.Rows[i]["name"].ToString());
}

}

public override string Text
{
get
{
string value = "";

if (comboBox1.Text.IndexOf("-") > 0)
{
value = comboBox1.Text.Substring(0, comboBox1.Text.IndexOf("-"));
}
else
{
value = comboBox1.Text.Trim();
}

//if (comboBox1.Text.Trim()!="")value =comboBox1.Text.Substring(0, comboBox1.Text.IndexOf("-"));
return value;
}

set { comboBox1.Text = value; }

}
public int SelectedIndex
{

get
{

return comboBox1.SelectedIndex;
}

set { comboBox1.SelectedIndex = value; }

}
public delegate void UserHandler(object sender,System.EventArgs e);
//public event UserHandler SelectedIndexChanged;//如果要将事件帮定到控件里面的事件则
// private void cboDataBase_SelectedIndexChanged(object sender, System.EventArgs e) { OnDBSChanged(sender,e); }
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
//SelectedIndexChanged(sender, e);

}

}