BindingSource.Sort Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Mendapatkan atau mengatur nama kolom yang digunakan untuk pengurutan, dan urutan pengurutan untuk menampilkan baris di sumber data.

public:
 property System::String ^ Sort { System::String ^ get(); void set(System::String ^ value); };

public string Sort { get; set; }

member this.Sort : string with get, set

Public Property Sort As String

Nilai Properti

String

String peka huruf besar/kecil yang berisi nama kolom diikuti dengan "ASC" (untuk naik) atau "DESC" (untuk turun). Default adalah null.

Contoh

Contoh berikut menunjukkan cara menggunakan Sort properti untuk melakukan pengurutan dasar dengan DataView. Untuk menjalankan contoh ini, tempelkan kode ke dalam Formulir Windows dan panggil PopulateDataViewAndSort dari konstruktor formulir atau Load metode penanganan peristiwa. Formulir Anda harus mengimpor System.Xml namespace dan System.IO .

private void PopulateDataViewAndSort()
{
    DataSet set1 = new DataSet();

    // Some xml data to populate the DataSet with.
    string musicXml =
        "<?xml version='1.0' encoding='UTF-8'?>" +
        "<music>" +
        "<recording><artist>Coldplay</artist><cd>X&Y</cd></recording>" +
        "<recording><artist>Dave Matthews</artist><cd>Under the Table and Dreaming</cd></recording>" +
        "<recording><artist>Dave Matthews</artist><cd>Live at Red Rocks</cd></recording>" +
        "<recording><artist>Natalie Merchant</artist><cd>Tigerlily</cd></recording>" +
        "<recording><artist>U2</artist><cd>How to Dismantle an Atomic Bomb</cd></recording>" +
        "</music>";

    // Read the xml.
    StringReader reader = new StringReader(musicXml);
    set1.ReadXml(reader);

    // Get a DataView of the table contained in the dataset.
    DataTableCollection tables = set1.Tables;
    DataView view1 = new DataView(tables[0]);

    // Create a DataGridView control and add it to the form.
    DataGridView datagridview1 = new DataGridView();
    datagridview1.AutoGenerateColumns = true;
    this.Controls.Add(datagridview1);

    // Create a BindingSource and set its DataSource property to
    // the DataView.
    BindingSource source1 = new BindingSource();
    source1.DataSource = view1;

    // Set the data source for the DataGridView.
    datagridview1.DataSource = source1;

    source1.Sort = "cd";
}

Private Sub PopulateDataViewAndSort() 
    Dim set1 As New DataSet()
    
    ' Some xml data to populate the DataSet with.
    Dim musicXml As String = "<?xml version='1.0' encoding='UTF-8'?>" & _
        "<music>" & _
        "<recording><artist>Coldplay</artist><cd>X&Y</cd></recording>" & _
        "<recording><artist>Dave Matthews</artist><cd>Under the Table and Dreaming</cd></recording>" & _
        "<recording><artist>Dave Matthews</artist><cd>Live at Red Rocks</cd></recording>" & _
        "<recording><artist>Natalie Merchant</artist><cd>Tigerlily</cd></recording>" & _
        "<recording><artist>U2</artist><cd>How to Dismantle an Atomic Bomb</cd></recording>" & _
         "</music>"
    
    ' Read the xml.
    Dim reader As New StringReader(musicXml)
    set1.ReadXml(reader)
    
    ' Get a DataView of the table contained in the dataset.
    Dim tables As DataTableCollection = set1.Tables
    Dim view1 As New DataView(tables(0))
    
    ' Create a DataGridView control and add it to the form.
    Dim datagridview1 As New DataGridView()
    datagridview1.AutoGenerateColumns = True
    Me.Controls.Add(datagridview1)
    
    ' Create a BindingSource and set its DataSource property to
    ' the DataView.
    Dim source1 As New BindingSource()
    source1.DataSource = view1
    
    ' Set the data source for the DataGridView.
    datagridview1.DataSource = source1
    
    source1.Sort = "cd"

End Sub

Contoh berikut menunjukkan cara menggunakan Sort properti untuk melakukan pengurutan tingkat lanjut dengan DataView. Untuk menjalankan contoh ini, tempelkan kode ke dalam Formulir Windows dan panggil PopulateDataViewAndAdvancedSort dari konstruktor formulir atau Load metode penanganan peristiwa. Formulir Anda harus mengimpor System.Xml namespace dan System.IO .

private void PopulateDataViewAndAdvancedSort()
{
    DataSet set1 = new DataSet();

    // Some xml data to populate the DataSet with.
    string musicXml =
        "<?xml version='1.0' encoding='UTF-8'?>" +
        "<music>" +
        "<recording><artist>Dave Matthews</artist><cd>Under the Table and Dreaming</cd></recording>" +
        "<recording><artist>Coldplay</artist><cd>X&Y</cd></recording>" +
        "<recording><artist>Dave Matthews</artist><cd>Live at Red Rocks</cd></recording>" +
        "<recording><artist>U2</artist><cd>Joshua Tree</cd></recording>" +
        "<recording><artist>U2</artist><cd>How to Dismantle an Atomic Bomb</cd></recording>" +
        "<recording><artist>Natalie Merchant</artist><cd>Tigerlily</cd></recording>" +
        "</music>";

    // Read the xml.
    StringReader reader = new StringReader(musicXml);
    set1.ReadXml(reader);

    // Get a DataView of the table contained in the dataset.
    DataTableCollection tables = set1.Tables;
    DataView view1 = new DataView(tables[0]);

    // Create a DataGridView control and add it to the form.
    DataGridView datagridview1 = new DataGridView();
    datagridview1.AutoGenerateColumns = true;
    this.Controls.Add(datagridview1);

    // Create a BindingSource and set its DataSource property to
    // the DataView.
    BindingSource source1 = new BindingSource();
    source1.DataSource = view1;

    // Set the data source for the DataGridView.
    datagridview1.DataSource = source1;

    source1.Sort = "artist ASC, cd ASC";
}

Private Sub PopulateDataViewAndAdvancedSort() 
    Dim set1 As New DataSet()
    
    ' Some xml data to populate the DataSet with.
    Dim musicXml As String = "<?xml version='1.0' encoding='UTF-8'?>" & _
        "<music>" & _
        "<recording><artist>Dave Matthews</artist><cd>Under the Table and Dreaming</cd></recording>" & _
        "<recording><artist>Coldplay</artist><cd>X&Y</cd></recording>" & _
        "<recording><artist>Dave Matthews</artist><cd>Live at Red Rocks</cd></recording>" & _
        "<recording><artist>U2</artist><cd>Joshua Tree</cd></recording>" & _
        "<recording><artist>U2</artist><cd>How to Dismantle an Atomic Bomb</cd></recording>" & _
        "<recording><artist>Natalie Merchant</artist><cd>Tigerlily</cd></recording>" & _
        "</music>"
    
    ' Read the xml.
    Dim reader As New StringReader(musicXml)
    set1.ReadXml(reader)
    
    ' Get a DataView of the table contained in the dataset.
    Dim tables As DataTableCollection = set1.Tables
    Dim view1 As New DataView(tables(0))
    
    ' Create a DataGridView control and add it to the form.
    Dim datagridview1 As New DataGridView()
    datagridview1.AutoGenerateColumns = True
    Me.Controls.Add(datagridview1)
    
    ' Create a BindingSource and set its DataSource property to
    ' the DataView.
    Dim source1 As New BindingSource()
    source1.DataSource = view1
    
    ' Set the data source for the DataGridView.
    datagridview1.DataSource = source1
    
    source1.Sort = "artist ASC, cd ASC"

Keterangan

Properti Sort adalah string peka huruf besar/kecil yang menentukan nama kolom yang digunakan untuk mengurutkan baris, bersama dengan arah pengurutan. Kolom diurutkan naik secara default. Beberapa kolom dapat dipisahkan dengan koma, seperti "State, ZipCode DESC".

Untuk mendukung pengurutan, daftar yang mendasar harus mengimplementasikan IBindingList antarmuka atau IBindingListView . Kemampuan ini dapat dikueri melalui SupportsSorting properti . Pengurutan multikolom tersedia saat SupportsAdvancedSorting properti adalah true.

Sort Mengatur properti akan mengubah daftar internal tergantung pada jenisnya:

• Jika daftar berjenis IBindingList, IBindingList.SortProperty properti dan IBindingList.SortDirection diatur dalam daftar internal.

• Jika daftar berjenis IBindingListView, IBindingListView.SortDescriptions properti diatur.

Properti pengurutan daftar internal hanya diubah ketika string pengurutan bukan null. Aksesor get untuk properti ini tidak akan mengambil nilai pengurutan daftar internal; sebagai gantinya, itu akan mengembalikan set nilai aksesor. Nilai Sort properti akan bertahan ketika sumber data berubah.

Lihat juga

• Filter
• RemoveSort()