DataColumn.ColumnName DataColumn.ColumnName DataColumn.ColumnName DataColumn.ColumnName Property

定義

取得または設定内の列の名前、DataColumnCollectionします。Gets or sets the name of the column in the DataColumnCollection.

public:
 property System::String ^ ColumnName { System::String ^ get(); void set(System::String ^ value); };
[System.Data.DataSysDescription("DataColumnColumnNameDescr")]
public string ColumnName { get; set; }
member this.ColumnName : string with get, set
Public Property ColumnName As String

プロパティ値

列の名前。The name of the column.

例外

設定されてnullか空の文字列と列がコレクションに属しています。The property is set to null or an empty string and the column belongs to a collection.

コレクション内で同じ名前の列が既に存在します。A column with the same name already exists in the collection. 名前比較では、大文字小文字を区別しません。The name comparison is not case sensitive.

次の例では、取得、ColumnName内の各テーブルの各列に対して、DataSetします。The following examples gets the ColumnName for every column in every table in a DataSet. 作成する方法も示します、DataColumnを新しいColumnNameします。The example also shows how to create a DataColumn with a new ColumnName.

private void PrintColumnNames(DataSet dataSet)
{
    // For each DataTable, print the ColumnName.
    foreach(DataTable table in dataSet.Tables)
    {
        foreach(DataColumn column in table.Columns)
        {
            Console.WriteLine(column.ColumnName);
        }
    }
}

private void AddColumn(DataTable table)
{
    DataColumn column;
    column = new DataColumn();
    column.ColumnName = "SupplierID";
    column.DataType = System.Type.GetType("System.String");
    column.Unique = true;
    column.AutoIncrement = false;
    column.Caption = "SupplierID";
    column.ReadOnly = false;

    // Add the column to the table's columns collection.
    table.Columns.Add(column);
}
Private Sub PrintColumnNames(dataSet As DataSet)
    Dim table As DataTable
    Dim column As DataColumn 

    ' For each DataTable, print the ColumnName.
    For Each table in dataSet.Tables
        For Each column in table.Columns
        Console.WriteLine(column.ColumnName)
        Next
    Next
End Sub

Private Sub AddColumn(table As DataTable)
    Dim column As DataColumn
    column = New DataColumn()

    With column
        .ColumnName = "SupplierID"
        .DataType = System.Type.GetType("System.String")
        .Unique = True
        .AutoIncrement = False
        .Caption = "SupplierID"
        .ReadOnly = False
    End With

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

注釈

ときに、DataColumnは no が作成されると、ColumnName値。When a DataColumn is created, it has no ColumnName value. ただし、ときに、DataColumnに追加されます、DataColumnCollectionDataTableオブジェクト、既定の名前 ("Column1"、"Column2") が与えられます。However, when the DataColumn is added to a DataColumnCollection for a DataTable object, it is given a default name ("Column1", "Column2", and so on).

既定で、Caption値に設定されて、ColumnName値。By default, the Caption value is set to the ColumnName value.

適用対象

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