DataGridViewCell.ColumnIndex Propriété

Définition

Espace de noms:

System.Windows.Forms

Assembly:

System.Windows.Forms.dll

Obtient l'index de colonne pour cette cellule.

public:
 property int ColumnIndex { int get(); };

public int ColumnIndex { get; }

member this.ColumnIndex : int

Public ReadOnly Property ColumnIndex As Integer

Valeur de propriété

Int32

Index de la colonne qui contient la cellule ; -1 si la cellule n'est pas contenue dans une colonne.

Exemples

L’exemple de code suivant montre comment utiliser la ColumnIndex propriété pour déterminer les colonnes à case activée pour les valeurs entières. Dans cet exemple, les cellules de la Description colonne sont ignorées lorsque le contenu des cellules sélectionnées est additionné. Cet exemple fait partie d’un exemple plus grand disponible dans l’événement DataGridView.SelectionChanged .

private void UpdateLabelText()
{
    int WithdrawalTotal = 0;
    int DepositTotal = 0;
    int SelectedCellTotal = 0;
    int counter;

    // Iterate through all the rows and sum up the appropriate columns.
    for (counter = 0; counter < (DataGridView1.Rows.Count);
        counter++)
    {
        if (DataGridView1.Rows[counter].Cells["Withdrawals"].Value
            != null)
        {
            if (DataGridView1.Rows[counter].
                Cells["Withdrawals"].Value.ToString().Length != 0)
            {
                WithdrawalTotal += int.Parse(DataGridView1.Rows[counter].
                    Cells["Withdrawals"].Value.ToString());
            }
        }

        if (DataGridView1.Rows[counter].Cells["Deposits"].Value != null)
        {
            if (DataGridView1.Rows[counter]
                .Cells["Deposits"].Value.ToString().Length != 0)
            {
                DepositTotal += int.Parse(DataGridView1.Rows[counter]
                    .Cells["Deposits"].Value.ToString());
            }
        }
    }

    // Iterate through the SelectedCells collection and sum up the values.
    for (counter = 0;
        counter < (DataGridView1.SelectedCells.Count); counter++)
    {
        if (DataGridView1.SelectedCells[counter].FormattedValueType ==
            Type.GetType("System.String"))
        {
            string value = null;

            // If the cell contains a value that has not been commited,
            // use the modified value.
            if (DataGridView1.IsCurrentCellDirty == true)
            {

                value = DataGridView1.SelectedCells[counter]
                    .EditedFormattedValue.ToString();
            }
            else
            {
                value = DataGridView1.SelectedCells[counter]
                    .FormattedValue.ToString();
            }
            if (value != null)
            {
                // Ignore cells in the Description column.
                if (DataGridView1.SelectedCells[counter].ColumnIndex !=
                    DataGridView1.Columns["Description"].Index)
                {
                    if (value.Length != 0)
                    {
                        SelectedCellTotal += int.Parse(value);
                    }
                }
            }
        }
    }

    // Set the labels to reflect the current state of the DataGridView.
    Label1.Text = "Withdrawals Total: " + WithdrawalTotal.ToString();
    Label2.Text = "Deposits Total: " + DepositTotal.ToString();
    Label3.Text = "Selected Cells Total: " + SelectedCellTotal.ToString();
    Label4.Text = "Total entries: " + DataGridView1.RowCount.ToString();
}

Private Sub UpdateLabelText()
    Dim WithdrawalTotal As Integer = 0
    Dim DepositTotal As Integer = 0
    Dim SelectedCellTotal As Integer = 0
    Dim counter As Integer

    ' Iterate through all the rows and sum up the appropriate columns.
    For counter = 0 To (DataGridView1.Rows.Count - 1)
        If Not DataGridView1.Rows(counter) _
            .Cells("Withdrawals").Value Is Nothing Then

            If Not DataGridView1.Rows(counter) _
                .Cells("Withdrawals").Value.ToString().Length = 0 Then

                WithdrawalTotal += _
                    Integer.Parse(DataGridView1.Rows(counter) _
                    .Cells("Withdrawals").Value.ToString())
            End If
        End If

        If Not DataGridView1.Rows(counter) _
            .Cells("Deposits").Value Is Nothing Then

            If Not DataGridView1.Rows(counter) _
                .Cells("Deposits").Value.ToString().Length = 0 Then

                DepositTotal += _
                    Integer.Parse(DataGridView1.Rows(counter) _
                    .Cells("Deposits").Value.ToString())
            End If
        End If
    Next

    ' Iterate through the SelectedCells collection and sum up the values.
    For counter = 0 To (DataGridView1.SelectedCells.Count - 1)
        If DataGridView1.SelectedCells(counter).FormattedValueType Is _
        Type.GetType("System.String") Then

            Dim value As String = Nothing

            ' If the cell contains a value that has not been commited,
            ' use the modified value.
            If (DataGridView1.IsCurrentCellDirty = True) Then

                value = DataGridView1.SelectedCells(counter) _
                    .EditedFormattedValue.ToString()
            Else

                value = DataGridView1.SelectedCells(counter) _
                    .FormattedValue.ToString()
            End If

            If value IsNot Nothing Then

                ' Ignore cells in the Description column.
                If Not DataGridView1.SelectedCells(counter).ColumnIndex = _
                    DataGridView1.Columns("Description").Index Then

                    If Not value.Length = 0 Then
                        SelectedCellTotal += Integer.Parse(value)
                    End If
                End If
            End If
        End If

    Next

    ' Set the labels to reflect the current state of the DataGridView.
    Label1.Text = "Withdrawals Total: " & WithdrawalTotal.ToString()
    Label2.Text = "Deposits Total: " & DepositTotal.ToString()
    Label3.Text = "Selected Cells Total: " & SelectedCellTotal.ToString()
    Label4.Text = "Total entries: " & DataGridView1.RowCount.ToString()
End Sub

Remarques

L’index de colonne de la ligne qui contient les en-têtes de ligne a la valeur -1.

Voir aussi

• DataGridView
• RowIndex