我将ListBox
与本地数据库中的一个表相连,该表有两列:
名称和价格。
我希望从Item
中选择的ListBox
发送。 Item
的名称和价格应添加到下一个选定Item
的价格中,并应打印收据。
我怎样才能做到这一点?
最佳答案
您将不得不添加更多逻辑以满足您的特定需求,但是以下代码应作为实现您要完成的目标的通用方法。
public class DBRowObject { // The object that will be stored in the "DataSource" of the ComboBox
public int iPrice = 0;
public string strName = "";
public DBRowObject(int price, string name) {
iPrice = price;
strName = name;
}
public override string ToString() // This means the combo box will display the name
{
return strName;
}
}
public Form1()
{
InitializeComponent();
List<DBRowObject> lsRows = new List<DBRowObject>(){new DBRowObject(3,"Bob"),new DBRowObject(2,"Sam"),new DBRowObject(5,"John")};
this.cbCombo.DataSource = lsRows;
}
public DBRowObject prevSelected = null;
private void cbCombo_SelectedValueChanged(object sender, EventArgs e)
{
DBRowObject dbrCurr = (DBRowObject)cbCombo.SelectedItem;
if (prevSelected != null) {
dbrCurr.iPrice += prevSelected.iPrice;
}
// TODO Display information about these objects and perform various other tasks
prevSelected = dbrCurr;
}