DataGridViewCellFormattingEventArgs Constructeur
Définition
Important
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Initialise une nouvelle instance de la classe DataGridViewCellFormattingEventArgs.
public:
DataGridViewCellFormattingEventArgs(int columnIndex, int rowIndex, System::Object ^ value, Type ^ desiredType, System::Windows::Forms::DataGridViewCellStyle ^ cellStyle);
public DataGridViewCellFormattingEventArgs (int columnIndex, int rowIndex, object value, Type desiredType, System.Windows.Forms.DataGridViewCellStyle cellStyle);
public DataGridViewCellFormattingEventArgs (int columnIndex, int rowIndex, object? value, Type? desiredType, System.Windows.Forms.DataGridViewCellStyle? cellStyle);
public DataGridViewCellFormattingEventArgs (int columnIndex, int rowIndex, object? value, Type? desiredType, System.Windows.Forms.DataGridViewCellStyle cellStyle);
new System.Windows.Forms.DataGridViewCellFormattingEventArgs : int * int * obj * Type * System.Windows.Forms.DataGridViewCellStyle -> System.Windows.Forms.DataGridViewCellFormattingEventArgs
Public Sub New (columnIndex As Integer, rowIndex As Integer, value As Object, desiredType As Type, cellStyle As DataGridViewCellStyle)
Paramètres
- columnIndex
- Int32
Index de colonne de la cellule qui a déclenché l'événement.
- rowIndex
- Int32
Index de ligne de la cellule qui a déclenché l'événement.
- value
- Object
Contenu de la cellule.
- desiredType
- Type
Type dans lequel convertir value
.
- cellStyle
- DataGridViewCellStyle
Index du style de la cellule qui a déclenché l'événement.
Exceptions
Exemples
L’exemple de code suivant montre comment utiliser un DataGridViewCellFormattingEventArgs.
void dataGridView1_CellFormatting( Object^ /*sender*/, DataGridViewCellFormattingEventArgs^ e )
{
// If the column is the Artist column, check the
// value.
if ( this->dataGridView1->Columns[ e->ColumnIndex ]->Name->Equals( "Artist" ) )
{
if ( e->Value != nullptr )
{
// Check for the string "pink" in the cell.
String^ stringValue = dynamic_cast<String^>(e->Value);
stringValue = stringValue->ToLower();
if ( (stringValue->IndexOf( "pink" ) > -1) )
{
DataGridViewCellStyle^ pinkStyle = gcnew DataGridViewCellStyle;
//Change the style of the cell.
pinkStyle->BackColor = Color::Pink;
pinkStyle->ForeColor = Color::Black;
pinkStyle->Font = gcnew System::Drawing::Font( "Times New Roman",8,FontStyle::Bold );
e->CellStyle = pinkStyle;
}
}
}
else
if ( this->dataGridView1->Columns[ e->ColumnIndex ]->Name->Equals( "Release Date" ) )
{
ShortFormDateFormat( e );
}
}
//Even though the date internaly stores the year as YYYY, using formatting, the
//UI can have the format in YY.
void ShortFormDateFormat( DataGridViewCellFormattingEventArgs^ formatting )
{
if ( formatting->Value != nullptr )
{
try
{
System::Text::StringBuilder^ dateString = gcnew System::Text::StringBuilder;
DateTime theDate = DateTime::Parse( formatting->Value->ToString() );
dateString->Append( theDate.Month );
dateString->Append( "/" );
dateString->Append( theDate.Day );
dateString->Append( "/" );
dateString->Append( theDate.Year.ToString()->Substring( 2 ) );
formatting->Value = dateString->ToString();
formatting->FormattingApplied = true;
}
catch ( Exception^ /*notInDateFormat*/ )
{
// Set to false in case there are other handlers interested trying to
// format this DataGridViewCellFormattingEventArgs instance.
formatting->FormattingApplied = false;
}
}
}
private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
// If the column is the Artist column, check the
// value.
if (this.dataGridView1.Columns[e.ColumnIndex].Name == "Artist")
{
if (e.Value != null)
{
// Check for the string "pink" in the cell.
string stringValue = (string)e.Value;
stringValue = stringValue.ToLower();
if ((stringValue.IndexOf("pink") > -1))
{
e.CellStyle.BackColor = Color.Pink;
}
}
}
else if (this.dataGridView1.Columns[e.ColumnIndex].Name == "Release Date")
{
ShortFormDateFormat(e);
}
}
//Even though the date internaly stores the year as YYYY, using formatting, the
//UI can have the format in YY.
private static void ShortFormDateFormat(DataGridViewCellFormattingEventArgs formatting)
{
if (formatting.Value != null)
{
try
{
System.Text.StringBuilder dateString = new System.Text.StringBuilder();
DateTime theDate = DateTime.Parse(formatting.Value.ToString());
dateString.Append(theDate.Month);
dateString.Append("/");
dateString.Append(theDate.Day);
dateString.Append("/");
dateString.Append(theDate.Year.ToString().Substring(2));
formatting.Value = dateString.ToString();
formatting.FormattingApplied = true;
}
catch (FormatException)
{
// Set to false in case there are other handlers interested trying to
// format this DataGridViewCellFormattingEventArgs instance.
formatting.FormattingApplied = false;
}
}
}
Private Sub dataGridView1_CellFormatting(ByVal sender As Object, _
ByVal e As DataGridViewCellFormattingEventArgs) _
Handles dataGridView1.CellFormatting
' If the column is the Artist column, check the
' value.
If Me.dataGridView1.Columns(e.ColumnIndex).Name _
= "Artist" Then
If e.Value IsNot Nothing Then
' Check for the string "pink" in the cell.
Dim stringValue As String = _
CType(e.Value, String)
stringValue = stringValue.ToLower()
If ((stringValue.IndexOf("pink") > -1)) Then
e.CellStyle.BackColor = Color.Pink
End If
End If
ElseIf Me.dataGridView1.Columns(e.ColumnIndex).Name _
= "Release Date" Then
ShortFormDateFormat(e)
End If
End Sub
'Even though the date internaly stores the year as YYYY, using formatting, the
'UI can have the format in YY.
Private Shared Sub ShortFormDateFormat(ByVal formatting As DataGridViewCellFormattingEventArgs)
If formatting.Value IsNot Nothing Then
Try
Dim dateString As System.Text.StringBuilder = New System.Text.StringBuilder()
Dim theDate As Date = DateTime.Parse(formatting.Value.ToString())
dateString.Append(theDate.Month)
dateString.Append("/")
dateString.Append(theDate.Day)
dateString.Append("/")
dateString.Append(theDate.Year.ToString().Substring(2))
formatting.Value = dateString.ToString()
formatting.FormattingApplied = True
Catch notInDateFormat As FormatException
' Set to false in case there are other handlers interested trying to
' format this DataGridViewCellFormattingEventArgs instance.
formatting.FormattingApplied = False
End Try
End If
End Sub
Remarques
Le desiredType
paramètre représente le type vers lequel le value
paramètre doit être converti et desiredType
la propriété de FormattedValueType la cellule lui est attribuée. Par exemple, si une cellule met en forme des noms d’image en tant que bitmaps, value
est le String qui contient le nom de l’image et desiredType
représente Type le Bitmap type.
Si le CellFormatting gestionnaire d’événements ne définit pas la Value propriété sur un type qui peut être affiché par la cellule, le contenu de la cellule est mis en forme à l’aide des Formatpropriétés , NullValueet FormatProvider .
S’applique à
Voir aussi
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