加载 WPF 组合框的数据集

Question

DataSet dataSet = new DataSet();
using (SqlConnection connection = new SqlConnection("server=server;   database=database; user id=user; password=user"))
{
     connection.Open();
     using (SqlCommand command = new SqlCommand("SELECT DISTINCT ID FROM TABLE ORDER BY ID ASC", connection))
     {
          SqlDataAdapter reader = new SqlDataAdapter(command);
          reader.Fill(dataSet);
          IDComboBox.DataContext = dataSet; --> This doesn't work
          IDComboBox.Itemsource = dataSet.Tables[0].Columns[0].ToString() --> doesn't work
          IDComboBox.Itemsource = dataSet.Tables[0].Rows[0].ToString() --> doesn't work
          IDComboBox.Itemsource = dataSet.Tables[0].Rows --> doesn't work
          IDComboBox.Itemsource = dataSet.Tables[0].Columns --> doesn't work
          They don't work even with me pairing it the IDComboBox.DataContext = dataSet.Tables[0].Rows[0] or Columns[0]
     }
     connection.Close();
     connection.Dispose();
}

我需要用数据表中的数据填充 WPF 中的组合框。我一直在寻找的是使用 Combobox.Displaymember、Combobox.Source 来执行此操作的示例，但 C# WPF 应用程序没有这些选项。如何使用数据集或数据表中的数据加载 WPF 组合框？

我之前使用的一种方法是

  using (SqlConnection connection = new SqlConnection("server=server; database=database; user id=user; password=user"))
  {
      connection.Open();
      using (SqlCommand command = new SqlCommand("SELECT DISTINCT ID FROM Table ORDER BY ID ASC", connection))
      {
           SqlDataReader reader = command.ExecuteReader();
           while (reader.Read())
           {
               for (int i = 0; i < reader.FieldCount; i++)
               {
                   IDComboBox.Items.Add(reader[i].ToString());
               }
           }
       }
       connection.Close();
       connection.Dispose();
  }

我知道如果我有大量数据，将它循环到我的组合框中会非常慢，所以我想从数据集中转储它以减少运行时间。

Answer 1

WPF ComboBox 有一个 ItemSource 属性您可以使用。

IDComboBox.ItemsSource = dataSet.Tables[0].Rows;

Answer 2

源自 this example，您需要使用 ItemSource、DisplayMemberPath 和 SelectedValuePath 属性：

IDComboBox.ItemsSource = dataSet.Tables[0].DefaultView;
IDComboBox.DisplayMemberPath = dataSet.Tables[0].Columns["ID"].ToString();
IDComboBox.SelectedValuePath = dataSet.Tables[0].Columns["ID"].ToString();

在xml中：

<ComboBox  Name="IDComboBox" ItemsSource="{Binding}"/>

加载 WPF 组合框的数据集

Dataset Loading a WPF Combobox

c#

wpf

combobox