我已将所有数据绑定到我的数据网格中。 现在我想进行搜索。
我想通了,我可以用sql连接来搜索。但我只想在我的数据网格上搜索。因为我的数据已经绑定到我的数据网格。
这是照片
在顶部,我有一个文本框。如何使用文本框进行搜索/过滤? 也许我可以输入'Bahan Baku',它会搜索'Nama Kategori'。或者我也可以输入'Sayur',它会搜索'Keterangan Kategori'。我输入的内容会影响我的数据网格。
任何建议?谢谢。
修改
这是我的代码。
public partial class MainWindow : Window
{
//private ICollectionView MyData;
//string SearchText = string.Empty;
ObservableCollection<Category> _data = new ObservableCollection<Category>();
public ObservableCollection<Category> data { get { return _data; } }
public MainWindow()
{
InitializeComponent();
showData();
}
private void showData()
{
OleDbConnection conn = null;
OleDbCommand cmd = null;
try
{
conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=dbDemo1.accdb");
cmd = new OleDbCommand("select categoryID, categoryDesc, categoryItem from t_category", conn);
conn.Open();
using (var reader = cmd.ExecuteReader())
{
while (reader.Read())
{
data.Add(new Category
{
nCateogryID = int.Parse(reader[0].ToString()),
sCategoryDesc = reader[1].ToString(),
sCategoryItems = reader[2].ToString()
}
);
}
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
conn.Close();
}
}
private void textBox1_TextChanged(object sender, TextChangedEventArgs e)
{
TextBox t = sender as TextBox;
SearchText = t.Text.ToString();
MyData.Filter = FilterData;
}
private bool FilterData(object item)
{
var value = (Category)item;
if (value == null || value.nCateogryID == null)
return false;
return value.sCategoryDesc.ToLower().StartsWith(SearchText.ToLower()) || value.sCategoryItems.ToLower().StartsWith(SearchText.ToLower());
//return value.Book_Id.ToLower().StartsWith(SearchText.ToLower()) || value.Book_Name.ToLower().StartsWith(SearchText.ToLower()) || value.Author_Name.ToLower().ToString().StartsWith(SearchText.ToLower()) || value.Publisher_Name.ToLower().ToString().StartsWith(SearchText.ToLower().ToString()) || value.Book_Genre.ToLower().ToString().StartsWith(SearchText.ToLower().ToString()) || value.Language.ToLower().ToString().StartsWith(SearchText.ToLower().ToString()) || value.Book_EntryDate.ToLower().ToString().StartsWith(SearchText.ToLower().ToString());
}
}
这是我的班级类别:
public class Category
{
public int nCateogryID { get; set; }
public int nCategoryMaster { get; set; }
public int nCategoryDetail { get; set; }
public string sCategoryDesc { get; set; }
public string sCategoryItems { get; set; }
}
这是我的xaml
<Window x:Class="SearchGrid.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
DataContext="{Binding RelativeSource={RelativeSource Self}}"
Title="MainWindow" Height="350" Width="525">
<Grid>
<DataGrid AutoGenerateColumns="False" Height="258" HorizontalAlignment="Left" Margin="12,0,0,12" Name="dataGrid1" VerticalAlignment="Bottom" Width="479">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding ncategoryID}" Header="No." IsReadOnly="True" Width="30" />
<DataGridTextColumn Binding="{Binding sCategoryDesc}" Header="Nama Kategori" IsReadOnly="True" Width="160" />
<DataGridTextColumn Binding="{Binding sCategoryItems}" Header="Keterangan Kategori" IsReadOnly="True" Width="247" />
</DataGrid.Columns>
</DataGrid>
<TextBox Height="23" HorizontalAlignment="Left" Margin="12,12,0,0" Name="textBox1" VerticalAlignment="Top" Width="479" TextChanged="textBox1_TextChanged" />
</Grid>
</Window>
我收到了这个错误:
对象引用未设置为对象的实例。
答案 0 :(得分:6)
您必须在xaml中添加TextChanged事件,如
<TextBox Text="" Width="115" Canvas.Left="210" Canvas.Top="37" Height="23" TextChanged="TextBox_TextChanged" />
你的cs文件中的你的TextChanged事件看起来像是
private ICollectionView MyData;
string SearchText=string.Empty;
private void TextBox_TextChanged(object sender, TextChangedEventArgs e)
{
TextBox t= sender as TextBox;
SearchText=t.Text.ToString();
MyData.Filter = FilterData;
}
private bool FilterData(object item)
{
var value = (Book_Information)item;
if (value == null || value.Book_Id == null)
return false;
return value.Book_Id.ToLower().StartsWith(SearchText.ToLower()) || value.Book_Name.ToLower().StartsWith(SearchText.ToLower()) || value.Author_Name.ToLower().ToString().StartsWith(SearchText.ToLower()) || value.Publisher_Name.ToLower().ToString().StartsWith(SearchText.ToLower().ToString()) || value.Book_Genre.ToLower().ToString().StartsWith(SearchText.ToLower().ToString()) || value.Language.ToLower().ToString().StartsWith(SearchText.ToLower().ToString()) || value.Book_EntryDate.ToLower().ToString().StartsWith(SearchText.ToLower().ToString());
}
MyData包含您的整个数据集合 这是示例
ViewBook=new ObservableCollection<Book_Information>();
dataGrid1.ItemsSource=ViewBook;
MyData=CollectionViewSource.GetDefaultView(ViewBook);
答案 1 :(得分:1)