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DataColumn.ColumnMapping Properti

Definisi

Mendapatkan atau mengatur MappingType kolom.

public:
 virtual property System::Data::MappingType ColumnMapping { System::Data::MappingType get(); void set(System::Data::MappingType value); };
public virtual System.Data.MappingType ColumnMapping { get; set; }
[System.Data.DataSysDescription("DataColumnMappingDescr")]
public virtual System.Data.MappingType ColumnMapping { get; set; }
member this.ColumnMapping : System.Data.MappingType with get, set
[<System.Data.DataSysDescription("DataColumnMappingDescr")>]
member this.ColumnMapping : System.Data.MappingType with get, set
Public Overridable Property ColumnMapping As MappingType

Nilai Properti

Salah MappingType satu nilai.

Atribut

Contoh

Contoh berikut mengatur ColumnMapping properti jenis baru DataColumn.

private void AddColumn(DataTable table)
{
    // Create a new column and set its properties.
    DataColumn column = new DataColumn("column",
        typeof(int), "", MappingType.Attribute);
    column.DataType = Type.GetType("System.String");
    column.ColumnMapping = MappingType.Element;

    // Add the column the table's columns collection.
    table.Columns.Add(column);
}
Private Sub AddColumn(table As DataTable )
    ' Create a new column and set its properties.
    Dim column As New DataColumn("ID", _
        Type.GetType("System.Int32"), "", MappingType.Attribute)
    column.DataType = Type.GetType("System.String")
    column.ColumnMapping = MappingType.Element

    ' Add the column the table's columns collection.
    table.Columns.Add(column)
End Sub

Keterangan

Properti ColumnMapping menentukan bagaimana dipetakan DataColumn saat DataSet disimpan sebagai dokumen XML menggunakan WriteXml metode .

Misalnya, jika bernama DataColumn "customerID," dan propertinya ColumnMapping diatur ke MappingType.Element, nilai kolom akan menghasilkan XML berikut:

<Customers>
 <customerID>ALFKI</customerID>
......
 </Customers>
 <Orders>
 <OrderID>12345</OrderID>
 <customerID>ALFKI</customerID>
......
 </Orders>

Namun, jika kolom yang sama dipetakan ke MappingType.Attribute, XML berikut diproduksi:

<Customers customerID="ALFKI"........more attributes.....>
 <Order orderID="1234"....more attributes..../>
 <Order orderID="1234"....more attributes..../>
...... More orders for this customer
 </Customers>

DataColumn Gunakan konstruktor yang berisi type argumen untuk menentukan bagaimana dipetakan DataColumn saat DataSet diubah menjadi dokumen XML.

Properti ColumnMapping sesuai dengan argumen typekonstruktor .

Berlaku untuk

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