DataGridViewImageCell.FormattedValueType Proprietà

Definizione

Ottiene il tipo del valore formattato associato alla cella.Gets the type of the formatted value associated with the cell.

public:
 virtual property Type ^ FormattedValueType { Type ^ get(); };
public override Type FormattedValueType { get; }
member this.FormattedValueType : Type
Public Overrides ReadOnly Property FormattedValueType As Type

Valore della proprietà

Type

Oggetto Type che rappresenta il tipo di valore di visualizzazione della cella, ossia il tipo Image se la proprietà ValueIsIcon è impostata su false; in caso contrario, il tipo Icon.A Type object representing display value type of the cell, which is the Image type if the ValueIsIcon property is set to false or the Icon type otherwise.

Esempio

Nell'esempio di codice riportato di seguito viene illustrato come utilizzare la DataGridViewCell.FormattedValueType proprietà per determinare il tipo di contenuto della cella.The following code example demonstrates how to use the DataGridViewCell.FormattedValueType property to determine the type of the cell contents. In questo esempio, la DataGridViewCell.FormattedValueType proprietà viene utilizzata per determinare se la cella contiene un oggetto String prima di tentare di convertire il valore.In this example, the DataGridViewCell.FormattedValueType property is used to determine whether the cell contains a String before attempting to convert the value. Questo esempio fa parte di un esempio più ampio disponibile nell' DataGridView.SelectionChanged evento.This example is part of a larger example available in the DataGridView.SelectionChanged event.

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

Commenti

Il valore di questa proprietà è una proprietà è un Type oggetto che rappresenta il Image tipo o il Icon tipo, perché un oggetto DataGridViewImageCell può gestire solo le immagini grafiche.The value of this property is a property is a Type object representing either the Image type or the Icon type because a DataGridViewImageCell can only handle graphic images.

Si applica a

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