我正在處理窗體窗體應用程序。我有一個組合框和一個列表框。在我的組合框中,我有5個項目,我想顯示從組合框到列表框中選擇的相應項目。如何顯示從組合框到列表的對應項目框
假設我選擇第1項,它會顯示項目1.如果我選擇項目2,它將顯示項目2和項目1將消失,反之亦然。到目前爲止,我已經嘗試了這個代碼
listBox1.Items.Add(name)
此列表框添加statment添加到列表框中的新項目,如項目1,項目2,項目3等等,這不是我想要的。
using System.IO;
using System;
class Program
{
static void Main()
{
Console.WriteLine("Hello, World!");
private void fill_checkListBox()
{
myConn = new SqlConnection("Server = localhost; Initial Catalog= dbName; Trusted_Connection = True");
try
{
myConn.Open();
int index = applicationComboBox.SelectedIndex + 1;
string query = " SELECT td.chineseName, ad.applicationId, aud.applicationId, ad.applicationName FROM[AppUser_Detail] as aud LEFT OUTER JOIN[Teacher_Detail] as td ON aud.teacherId = td.teacherId LEFT OUTER JOIN[Application_Detail] as ad ON aud.applicationId = ad.applicationId LEFT OUTER JOIN[Class_Detail] as cd ON aud.classId = cd.classId where aud.applicationId = '" + index + "' AND NOT(td.teacherId IS NULL AND cd.classId IS NULL)";
myCommand = new SqlCommand(query, myConn);
SqlDataReader dr = myCommand.ExecuteReader();
//Reading all the value one by one
while (dr.Read())
{
//column is 1 in Application_Detail Data
//string value = applicationComboBox.GetItemText(applicationComboBox.Items[i]);
string name = dr.GetString(0);
teacherCheckListBox.Items.Clear();\ updated this line teacherCheckListBox.Items.Add(name);
}
//teacherCheckListBox.DataSource = dt;
myConn.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
}
謝謝大家的幫助,這是正確的答案:) – RedRocket