DataGridViewImageCell.FormattedValueType プロパティとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

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DataGridViewImageCell.FormattedValueType プロパティ

メモ : このプロパティは、.NET Framework version 2.0 で新しく追加されたものです。

セルに関連付けられた書式指定済みの値の型を取得します。

名前空間: System.Windows.Forms
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)
構文

Visual Basic (宣言)

Public Overrides ReadOnly
 Property FormattedValueType As Type

Visual Basic (使用法)

Dim instance As DataGridViewImageCell
Dim value As Type

value = instance.FormattedValueType

public override Type FormattedValueType { get;
 }

C++

public:
virtual property Type^ FormattedValueType {
    Type^ get () override;
}

/** @property */
public Type get_FormattedValueType ()

JScript

public override function get
 FormattedValueType () : Type

プロパティ値
セルの表示値の型を表す Type オブジェクト。ValueIsIcon プロパティが false に設定されている場合は Image 型、それ以外の場合は Icon 型です。

解説

DataGridViewImageCell が処理できるのはグラフィックイメージのみであるため、このプロパティは Image 型または Icon 型を表す Type オブジェクトです。

使用例

DataGridViewCell.FormattedValueType プロパティを使用して、セルの内容の型を確認する方法を次のコード例に示します。この例では、値の変換を試みる前に、DataGridViewCell.FormattedValueType プロパティを使用して、セルに String が格納されているかどうかを確認します。

Visual Basic

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 Not value Is
 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

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();
}