DataGridViewBand.Tag DataGridViewBand.Tag DataGridViewBand.Tag DataGridViewBand.Tag Property

定義

取得或設定物件,其中包含與群組列相關的資料。Gets or sets the object that contains data to associate with the band.

public:
 property System::Object ^ Tag { System::Object ^ get(); void set(System::Object ^ value); };
[System.ComponentModel.Browsable(false)]
public object Tag { get; set; }
member this.Tag : obj with get, set
Public Property Tag As Object

屬性值

Object,包含與群組列相關的資訊。An Object that contains information associated with the band. 預設為 nullThe default is null.

範例

下列程式碼範例會使用Tag若要設定擷取的屬性來儲存更新的色彩BackColor屬性。The following code example uses the Tag property to store a color that is later retrieved to set the BackColor property.

void PostRowCreation()
{
   SetBandColor( dataGridView->Columns[ 0 ], Color::CadetBlue );
   SetBandColor( dataGridView->Rows[ 1 ], Color::Coral );
   SetBandColor( dataGridView->Columns[ 2 ], Color::DodgerBlue );
}

void SetBandColor( DataGridViewBand^ band, Color color )
{
   band->Tag = color;
}


// Color the bands by the value stored in their tag.
void Button9_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   IEnumerator^ myEnum1 = dataGridView->Columns->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      DataGridViewBand^ band = static_cast<DataGridViewBand^>(myEnum1->Current);
      if ( band->Tag != nullptr )
      {
         band->DefaultCellStyle->BackColor =  *dynamic_cast<Color^>(band->Tag);
      }
   }

   IEnumerator^ myEnum2 = safe_cast<IEnumerable^>(dataGridView->Rows)->GetEnumerator();
   while ( myEnum2->MoveNext() )
   {
      DataGridViewBand^ band = safe_cast<DataGridViewBand^>(myEnum2->Current);
      if ( band->Tag != nullptr )
      {
         band->DefaultCellStyle->BackColor =  *dynamic_cast<Color^>(band->Tag);
      }
   }
}


private void PostRowCreation()
{
    SetBandColor(dataGridView.Columns[0], Color.CadetBlue);
    SetBandColor(dataGridView.Rows[1], Color.Coral);
    SetBandColor(dataGridView.Columns[2], Color.DodgerBlue);
}

private static void SetBandColor(DataGridViewBand band, Color color)
{
    band.Tag = color;
}

// Color the bands by the value stored in their tag.
private void Button9_Click(object sender, System.EventArgs e)
{

    foreach (DataGridViewBand band in dataGridView.Columns)
    {
        if (band.Tag != null)
        {
            band.DefaultCellStyle.BackColor = (Color)band.Tag;
        }
    }

    foreach (DataGridViewBand band in dataGridView.Rows)
    {
        if (band.Tag != null)
        {
            band.DefaultCellStyle.BackColor = (Color)band.Tag;
        }
    }
}
Private Sub PostRowCreation()
    SetBandColor(dataGridView.Columns(0), Color.CadetBlue)
    SetBandColor(dataGridView.Rows(1), Color.Coral)
    SetBandColor(dataGridView.Columns(2), Color.DodgerBlue)
End Sub

Private Shared Sub SetBandColor(ByVal band As DataGridViewBand, _
    ByVal color As Color)
    band.Tag = color
End Sub

' Color the bands by the value stored in their tag.
Private Sub Button9_Click(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles Button9.Click

    For Each band As DataGridViewBand In dataGridView.Columns
        If band.Tag IsNot Nothing Then
            band.DefaultCellStyle.BackColor = _
                CType(band.Tag, Color)
        End If
    Next

    For Each band As DataGridViewBand In dataGridView.Rows
        If band.Tag IsNot Nothing Then
            band.DefaultCellStyle.BackColor = _
                CType(band.Tag, Color)
        End If
    Next
End Sub

備註

Tag屬性可以儲存您要與群組列相關聯的任何物件。The Tag property can store any object that you want to associate with a band. 這個屬性通常用來儲存身分識別資訊,例如字串名稱的唯一識別碼 (例如Guid),或在資料庫中的群組列的資料的索引。This property is typically used to store identifying information, such as a string name, a unique identifier (for example, a Guid), or the index of the band's data in a database.

適用於

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