我有一个ListBox
,我是这样填充的:
var dtCustomers = db.GetTableBySQL(query).AsEnumerable().Select(rows =>
new CustomersModel
{
Name = rows.Field<string>("Name"),
ProjectKey = rows.Field<int>("ProjectKey")
});
lstCustomers.DataSource = dtCustomers.ToList();
lstCustomers.DisplayMember = "Name";
lstCustomers.ValueMember = "ProjectKey";
lstCustomers.ClearSelected();
现在,我要创建带有搜索按钮的TextBox
,以在此列表中查找并按以下项进行搜索:
private void btnSearch_Click(object sender, EventArgs e)
{
lstCustomers.SelectedItems.Clear();
for (int i = lstCustomers.Items.Count - 1; i >= 0; i--)
{
if (lstCustomers.Items[i].ToString().ToLower().Contains(txtSearch.Text.ToLower()))
{
lstCustomers.SetSelected(i, true);
}
}
lblitems.Text = lstCustomers.SelectedItems.Count.ToString() + "items found";
}
问题是它什么也找不到。我认为这是因为它是通过ValueMember
而不是DisplayMember
进行比较的。我可以按DisplayMember
在列表中搜索吗?
答案 0 :(得分:1)
您可以为此使用模式匹配,因为基础项将是您的CustomersModel
:
private void btnSearch_Click(object sender, EventArgs e)
{
lstCustomers.SelectedItems.Clear();
int matchCount = 0;
for (int i = lstCustomers.Items.Count - 1; i >= 0; i--)
{
if (lstCustomers.Items[i] is CustomersModel customer &&
customer.Name.IndexOf(txtSearch.Text, StringComparison.OrdinalIgnoreCase) > -1)
{
matchCount++;
lstCustomers.SetSelected(i, true);
}
}
lblItems.Text = $"{matchCount} item{(matchCount > 1 ? "s" : "")} found";
}