DataGridViewCellFormattingEventArgs 构造函数
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。
初始化 DataGridViewCellFormattingEventArgs 类的新实例。
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)
参数
- columnIndex
- Int32
引发此事件的单元格的列索引。
- rowIndex
- Int32
引发此事件的单元格的行索引。
- value
- Object
单元格的内容。
- desiredType
- Type
value
所要转换到的类型。
- cellStyle
- DataGridViewCellStyle
引发此事件的单元格的样式。
例外
示例
下面的代码示例演示如何使用 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
注解
desiredType
参数表示参数应转换为的类型value
,并desiredType
分配单元格的 FormattedValueType 属性。 例如,如果单元格将图片名称的格式设置为位图,value
则 为String包含图片名称的 ,表示desiredType
Type类型Bitmap。
CellFormatting如果事件处理程序未将 Value 属性设置为可由单元格显示的类型,则将使用 Format、 NullValue和 FormatProvider 属性设置单元格内容的格式。