C＃LastListBox的最后一項未顯示

Question

此代碼預過濾dataGridView，因此僅顯示列表中的已檢查項。

我面臨的問題是代碼每次都會忽略最后一項，除非我取消選中，再次檢查並按“Go”。

這是我的代碼：

public partial class Notifications : Form
{
    string filterstring = "";
    int count = 0;
    private void checkedListBox_ItemCheck(object sender, System.EventArgs e)
    {
        //  Loop through all items in the checkedBoxes.

        foreach (object itemChecked in checkedListBox.CheckedItems)
        {
            if (count != 0)
            {
                filterstring += "OR Responsible = '" + itemChecked.ToString() + "'";
            }
            else
                filterstring += "Responsible = '" + itemChecked.ToString() + "'";
            count += 1;
        }
    }
  private void button1_Click(object sender, EventArgs e)
    {
            DataTableCollection tables = myDatabaseDataSet.Tables;
            DataView view = new DataView(tables[0]);
            BindingSource source = new BindingSource();
            source.DataSource = view;
            dataGridView1.DataSource = source;
            source.Filter = filterstring;
    }

我知道解決方案可能很愚蠢，但我無法弄清楚。

Answer 1

private void checkedListBox_ItemCheck(object sender, ItemCheckEventArgs e)
{
    if (e.NewValue == CheckState.Checked)
        filterstring = "Responsible = '" + checkedListBox.Items[e.Index].ToString() + "' OR";
    //  Loop through all items in the checkedBoxes.

    foreach (object itemChecked in checkedListBox.CheckedItems)
    {
         filterstring += " Responsible = '" + itemChecked.ToString() + "' OR";
    }
    filterstring = filterstring.Substring(0, filterstring.LastIndexOf("OR"));
}

您必須檢查項目的新值是否被點擊。 如果選中它，您可以將其包含在過濾字符串中。 刪除最后一個OR比在每個迭代器中更好。 編輯：你的事件是EventArgs Bu應該是ItemCheckEventArgs