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[英]How to delete items from a ComboBox at runtime using C# / WinForms
[英]How to Selecting a More than one items in Combobox using C# WinForms
在這里,我添加了一個代碼,用於使用數據庫向Combobox中添加項目,但是我不知道如何在Combobox中使用多個選擇項。
admin = "Admin";
string query = "Select FirstName from Register where UserType = '" + admin + "' ";
SqlDataAdapter da = new SqlDataAdapter(query, con);
DataSet ds = new DataSet();
da.Fill(ds);
comboBox1.Text = "--- Select an Admin Here ---";
foreach (DataRow dr1 in ds.Tables[0].Rows)
{
comboBox1.Items.Add(dr1["FirstName"].ToString());
}
使用此代碼:
ListBox listBox1 = new ListBox();
// Set the SelectionMode to select multiple items.
listBox1.SelectionMode = SelectionMode.MultiExtended;
// Select three initial items from the list.
listBox1.SetSelected(0, True);
listBox1.SetSelected(2, True);
listBox1.SetSelected(4, True);
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