DataGridViewCell.FormattedValue 属性
定义
重要
一些信息与预发行产品相关,相应产品在发行之前可能会进行重大修改。 对于此处提供的信息,Microsoft 不作任何明示或暗示的担保。
获取为显示进行格式化的单元格的值。
public:
property System::Object ^ FormattedValue { System::Object ^ get(); };
[System.ComponentModel.Browsable(false)]
public object FormattedValue { get; }
[System.ComponentModel.Browsable(false)]
public object? FormattedValue { get; }
[<System.ComponentModel.Browsable(false)>]
member this.FormattedValue : obj
Public ReadOnly Property FormattedValue As Object
属性值
单元格的格式化值;如果该单元格不属于 DataGridView 控件,则为 null
。
- 属性
例外
ColumnIndex 小于 0,这表示该单元格为行标头单元格。
格式化失败,这是由于 DataError 控件的 DataGridView 事件无处理程序或处理程序将 ThrowException 属性设置为 true
而引起的。 通常情况下,可将该异常对象强制转换为类型 FormatException。
示例
下面的代码示例演示如何使用 FormattedValue 属性。 在此示例中, IsCurrentCellDirty 属性用于确定当前单元格的内容是否已编辑和未提交,如果单元格已修改, FormattedValue 则使用 。 此示例是 事件中提供的更大示例的 DataGridView.SelectionChanged 一部分。
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
注解
属性 Value 是单元格包含的实际数据对象,而 FormattedValue 是此对象的格式化表示形式。 ValueType和 FormattedValueType 属性分别对应于这些值的数据类型。
获取此属性的值会调用 GetFormattedValue 方法,以将单元格值转换为属性所 FormattedValueType 指示类型的等效显示值。 这会引发 DataGridView.CellFormatting 事件,你可以处理该事件以自定义值转换。
如果格式设置不成功,则会发生该 DataGridView.DataError 事件。 如果此事件没有处理程序,或者处理程序将 DataGridViewDataErrorEventArgs.ThrowException 属性设置为 true
,则会引发异常。
适用于
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