我尝试TextBox
在 WPF 应用程序中使用 C# 进行 Google Search 之类的自动完成,基本上我想要做的TextBox
是绑定到 SQL 数据库表的自动完成。该表有 2 个字段(条形码和名称),我的代码如下:
在 XAML 中:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="37*" />
<RowDefinition Height="88*" />
</Grid.RowDefinitions>
<TextBlock Text="Type Your Search :" HorizontalAlignment="Left" VerticalAlignment="Bottom" Width="112" Height="15.96" Margin="31,0,0,4" />
<TextBox HorizontalAlignment="Right" VerticalAlignment="Bottom" Height="25" Width="325" Margin="0,0,10,0" x:Name="txtCAuto" TextWrapping="NoWrap" />
<ListBox x:Name="lbSuggestion" SelectionChanged="lbSuggestion_SelectionChanged" Background="LightYellow" Grid.Row="1" Visibility="Collapsed" HorizontalAlignment="Right" VerticalAlignment="Top" Width="325" Margin="0,0,10,0"/>
</Grid>
后面的代码:
List<string> nameList;
List<Product> prodList;
public List<string> SelProd4Sale(string str )
{
string constr = "Data Source=.;Initial Catalog=AgamistaStore;User ID=emad2012;Password=emad_2012";
SqlConnection SqlCon = new SqlConnection(constr);
SqlCommand SqlCmdProds = new SqlCommand();
SqlCmdProds.Connection = SqlCon;
SqlCmdProds.CommandType = CommandType.Text;
SqlCmdProds.CommandText = "SELECT dbo.ProductsTbl.ProductID,ProductsTbl.ProductBarcode," +
"dbo.ProductsTbl.ProductName, dbo.ProductsTbl.SalePrice FROM dbo.ProductsTbl ";
SqlCon.Open();
SqlDataAdapter dapProds = new SqlDataAdapter();
dapProds.SelectCommand = SqlCmdProds;
DataSet dsProds = new DataSet();
dapProds.Fill(dsProds);
SqlCon.Close();
prodList = new List<Product>();
for (int i = 0; i < dsProds.Tables[0].Rows.Count; i++)
{
prodList.Add(new Product
(dsProds.Tables[0].Rows[i]["ProductBarcode"].ToString(),
dsProds.Tables[0].Rows[i]["ProductName"].ToString());
}
dsProds = null;
nameList = new List<string>()
{
prodList.ToString()
};
return nameList;
}
public Window2()
{
InitializeComponent();
SelProd4Sale(txtCAuto.Text);
txtCAuto.TextChanged += new TextChangedEventHandler(txtAuto_TextChanged);
}
#region TextBox-TextChanged-txtAuto
private void txtAuto_TextChanged(object sender, TextChangedEventArgs e)
{
string typedString = txtCAuto.Text.ToUpper();
List<string> autoList = new List<string>();
autoList.Clear();
foreach (string item in nameList)
{
if (!string.IsNullOrEmpty(txtCAuto.Text))
{
if (item.StartsWith(typedString))
{
autoList.Add(item);
}
}
}
if (autoList.Count > 0)
{
lbSuggestion.ItemsSource = autoList;
lbSuggestion.Visibility = Visibility.Visible;
}
else if (txtCAuto.Text.Equals(""))
{
lbSuggestion.Visibility = Visibility.Collapsed;
lbSuggestion.ItemsSource = null;
}
else
{
lbSuggestion.Visibility = Visibility.Collapsed;
lbSuggestion.ItemsSource = null;
}
}
#endregion
#region ListBox-SelectionChanged-lbSuggestion
private void lbSuggestion_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (lbSuggestion.ItemsSource != null)
{
lbSuggestion.Visibility = Visibility.Collapsed;
txtCAuto.TextChanged -= new TextChangedEventHandler(txtAuto_TextChanged);
if (lbSuggestion.SelectedIndex != -1)
{
txtCAuto.Text = lbSuggestion.SelectedItem.ToString();
}
txtCAuto.TextChanged += new TextChangedEventHandler(txtAuto_TextChanged);
}
}
#endregion
}
class Product
{
private string _ProductBarcode = "";
private string _ProductName = "";
public Product(string prodName,string prodBarcode)
{
this._ProductBarcode = prodBarcode;
this._ProductName = prodName;
}
public string ProductBarcode
{
get { return _ProductBarcode; }
set { _ProductBarcode = value; }
}
public string ProductName
{
get { return _ProductName; }
set { _ProductName = value; }
}
}
当我运行它时,我得到“System.Collections.Generic.List”作为结果而不是数据。
有人可以帮助我并告诉我有什么问题吗?