[英]Dataset Loading a WPF Combobox
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在WPF中填充组合框。 我一直发现的示例都是使用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。 如何使用来自数据集或数据表的数据加载WPF组合框?
我以前做过的一种方式是
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,将其循环到我的组合框中非常慢,因此我想将其从数据集中转储以减少运行时间。
从此示例派生,您将需要使用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();
并在xml
:
<ComboBox Name="IDComboBox" ItemsSource="{Binding}"/>
WPF ComboBox
具有您可以使用的ItemSource属性。
IDComboBox.ItemsSource = dataSet.Tables[0].Rows;
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