DataGridViewCell.ErrorText DataGridViewCell.ErrorText DataGridViewCell.ErrorText DataGridViewCell.ErrorText Property

定義

取得或設定文字,描述與儲存格相關聯的錯誤狀況。Gets or sets the text describing an error condition associated with the cell.

public:
 property System::String ^ ErrorText { System::String ^ get(); void set(System::String ^ value); };
[System.ComponentModel.Browsable(false)]
public string ErrorText { get; set; }
member this.ErrorText : string with get, set
Public Property ErrorText As String

屬性值

描述與儲存格相關聯之錯誤狀況的文字。The text that describes an error condition associated with the cell.

範例

下列程式碼範例示範如何在未DataGridView系結的中處理錯誤狀況時,使用這個屬性。The following code example demonstrates how to use this property when handling error conditions in an unbound DataGridView. 方法會將錯誤訊息字串設定ErrorText為屬性。 AnnotateCellThe AnnotateCell method sets an error message string to the ErrorText property.

void dataGridView1_CellValidating( Object^ /*sender*/, DataGridViewCellValidatingEventArgs^ newValue )
{
   DataGridViewColumn^ column = dataGridView1->Columns[ newValue->ColumnIndex ];
   if ( column->Name->Equals( "Track" ) )
   {
      CheckTrack( newValue );
   }
   else
   if ( column->Name->Equals( "Release Date" ) )
   {
      CheckDate( newValue );
   }
}

void CheckTrack( DataGridViewCellValidatingEventArgs^ newValue )
{
   Int32 ignored;
   if ( newValue->FormattedValue->ToString() == String::Empty )
   {
      NotifyUserAndForceRedo( "Please enter a track", newValue );
   }
   else
   if (  !Int32::TryParse( newValue->FormattedValue->ToString(), ignored ) )
   {
      NotifyUserAndForceRedo( "A Track must be a number", newValue );
   }
   else
   if ( Int32::Parse( newValue->FormattedValue->ToString() ) < 1 )
   {
      NotifyUserAndForceRedo( "Not a valid track", newValue );
      editedLastColumn = true;
   }
}

void NotifyUserAndForceRedo( String^ errorMessage, DataGridViewCellValidatingEventArgs^ newValue )
{
   MessageBox::Show( errorMessage );
   newValue->Cancel = true;
}

void CheckDate( DataGridViewCellValidatingEventArgs^ newValue )
{
   try
   {
      DateTime::Parse( newValue->FormattedValue->ToString() ).ToLongDateString();
      AnnotateCell( String::Empty, newValue );
   }
   catch ( FormatException^ /*ex*/ ) 
   {
      AnnotateCell( "You did not enter a valid date.", newValue );
   }
}

void AnnotateCell( String^ errorMessage, DataGridViewCellValidatingEventArgs^ editEvent )
{
   DataGridViewCell^ cell = dataGridView1->Rows[ editEvent->RowIndex ]->Cells[ editEvent->ColumnIndex ];
   cell->ErrorText = errorMessage;
}
private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{

    DataGridViewColumn column = dataGridView1.Columns[e.ColumnIndex];

    if (column.Name == "Track")
    {
        CheckTrack(e);
    }
    else if (column.Name == "Release Date")
    {
        CheckDate(e);
    }
}

private static void CheckTrack(DataGridViewCellValidatingEventArgs newValue)
{
    Int32 ignored = new Int32();
    if (String.IsNullOrEmpty(newValue.FormattedValue.ToString()))
    {
        NotifyUserAndForceRedo("Please enter a track", newValue);
    }
    else if (!Int32.TryParse(newValue.FormattedValue.ToString(), out ignored))
    {
        NotifyUserAndForceRedo("A Track must be a number", newValue);
    }
    else if (Int32.Parse(newValue.FormattedValue.ToString()) < 1)
    {
        NotifyUserAndForceRedo("Not a valid track", newValue);
    }
}

private static void NotifyUserAndForceRedo(string errorMessage, DataGridViewCellValidatingEventArgs newValue)
{
    MessageBox.Show(errorMessage);
    newValue.Cancel = true;
}

private void CheckDate(DataGridViewCellValidatingEventArgs newValue)
{
    try
    {
        DateTime.Parse(newValue.FormattedValue.ToString()).ToLongDateString();
        AnnotateCell(String.Empty, newValue);
    }
    catch (FormatException)
    {
        AnnotateCell("You did not enter a valid date.", newValue);
    }
}

private void AnnotateCell(string errorMessage, DataGridViewCellValidatingEventArgs editEvent)
{

    DataGridViewCell cell = dataGridView1.Rows[editEvent.RowIndex].Cells[editEvent.ColumnIndex];
    cell.ErrorText = errorMessage;
}
Private Sub dataGridView1_CellValidating(ByVal sender As Object, _
    ByVal e As _
    DataGridViewCellValidatingEventArgs) _
    Handles dataGridView1.CellValidating

    Dim column As DataGridViewColumn = _
        dataGridView1.Columns(e.ColumnIndex)

    If column.Name = "Track" Then
        CheckTrack(e)
    ElseIf column.Name = "Release Date" Then
        CheckDate(e)
    End If
End Sub

Private Shared Sub CheckTrack(ByVal newValue As DataGridViewCellValidatingEventArgs)
    If String.IsNullOrEmpty(newValue.FormattedValue.ToString()) Then
        NotifyUserAndForceRedo("Please enter a track", newValue)
    ElseIf Not Integer.TryParse( _
        newValue.FormattedValue.ToString(), New Integer()) Then
        NotifyUserAndForceRedo("A Track must be a number", newValue)
    ElseIf Integer.Parse(newValue.FormattedValue.ToString()) < 1 Then
        NotifyUserAndForceRedo("Not a valid track", newValue)
    End If
End Sub

Private Shared Sub NotifyUserAndForceRedo(ByVal errorMessage As String, ByVal newValue As DataGridViewCellValidatingEventArgs)
    MessageBox.Show(errorMessage)
    newValue.Cancel = True
End Sub

Private Sub CheckDate(ByVal newValue As DataGridViewCellValidatingEventArgs)
    Try
        DateTime.Parse(newValue.FormattedValue.ToString()).ToLongDateString()
        AnnotateCell(String.Empty, newValue)
    Catch ex As FormatException
        AnnotateCell("You did not enter a valid date.", newValue)
    End Try
End Sub

Private Sub AnnotateCell(ByVal errorMessage As String, _
    ByVal editEvent As DataGridViewCellValidatingEventArgs)

    Dim cell As DataGridViewCell = _
        dataGridView1.Rows(editEvent.RowIndex).Cells( _
            editEvent.ColumnIndex)
    cell.ErrorText = errorMessage
End Sub

備註

一般來說,在ErrorText CellValidating處理的事件DataGridView時,會使用屬性。Typically, the ErrorText property is used when handling the CellValidating event of the DataGridView. 如果資料格的值因某些驗證準則而失敗, ErrorText請設定屬性,並將的Cancel屬性DataGridViewCellValidatingEventArgs設定為,以true取消認可作業。If the cell's value fails some validation criteria, set the ErrorText property and cancel the commit operation by setting the Cancel property of the DataGridViewCellValidatingEventArgs to true. 然後會顯示DataGridView您指定的文字,而系統會提示使用者修正儲存格資料中的錯誤。The text you specify is then displayed by the DataGridView, and the user is prompted to fix the error in the cell's data.

DataGridView RowErrorTextNeeded當的VirtualMode屬性為CellErrorTextNeeded時,您可以使用和事件提供資料列和資料格的錯誤文字。 trueWhen the VirtualMode property of the DataGridView is true, you can provide error text for rows and cells using the RowErrorTextNeeded and CellErrorTextNeeded events.

當您將不同ErrorText的字串指派給資料格時CellErrorTextChanged ,就會引發DataGridView控制項的事件。When you assign a different ErrorText string to a cell, the CellErrorTextChanged event of the DataGridView control is raised.

從 .NET Framework 4.5.2 開始,當 app.config 檔案包含下列專案時,調整錯誤圖示的大小會由系統 DPI 設定決定:Starting with the .NET Framework 4.5.2, resizing of the error icon is determined by the system DPI setting when the app.config file contains the following entry:

<appSettings>  
  <add key="EnableWindowsFormsHighDpiAutoResizing" value="true" />  
</appSettings>  

適用於

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