Question

private void Window_Loaded(object sender, RoutedEventArgs e)
    {
        try
        {
            SqlConnection con = new SqlConnection(@"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=SARManagement;Data Source=AIZAZ\SQLEXPRESS");
            con.Open();
            string query = "Select Semester,ID FROM Batch";
            SqlCommand da = con.CreateCommand();
            da.CommandText = query;
            SqlDataAdapter adapter = new SqlDataAdapter(da);
            DataSet ds = new DataSet();
            adapter.Fill(ds, "Batch");
            Semester.ItemsSource = ds.Tables[0].DefaultView;
            Semester.DisplayMemberPath = ds.Tables[0].Columns["Semester"].ToString();
            Semester.SelectedValuePath = ds.Tables[0].Columns["ID"].ToString();

        }
        catch (Exception ex)
        {
            MessageBox.Show("" + ex);
        }         
    }
private void Semester_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        here how can i get combobox items.. that are listed in combobox as displaymemberpath
    }

如何获取从数据库中检索的组合框作为displaymemberpath ...或共享另一种方式来检索数据并以listboxitem的形式插入数据

Answer 1

DisplayMemberPath和SelectedValuePath应该只有一个字符串，其中包含相应列的名称。试试这个：

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    try
    {
        SqlConnection con = new SqlConnection(@"Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=SARManagement;Data Source=AIZAZ\SQLEXPRESS");
        con.Open();
        string query = "Select Semester,ID FROM Batch";
        SqlCommand da = con.CreateCommand();
        da.CommandText = query;
        SqlDataAdapter adapter = new SqlDataAdapter(da);
        DataSet ds = new DataSet();
        adapter.Fill(ds, "Batch");
        Semester.ItemsSource = ds.Tables[0].DefaultView;
        Semester.DisplayMemberPath = "Semester";
        Semester.SelectedValuePath = "ID";

    }
    catch (Exception ex)
    {
        MessageBox.Show("" + ex);
    }         
}

private void Semester_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    DataRowView data = (DataRowView)Semester.SelectedItem;
    string selstr = data["Semester"].ToString();
    int sel = (int)data["ID"];
    MessageBox.Show("ID: " + sel + " Value: " + selstr);
}

c＃Wpf - 我如何获得列出的项目（组合框）

1 个答案: