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從這個link開始我做了一個單選按鈕類型(列和單元格)的自定義DataGridViewColumn。c#:DataGridView自定義單元格丟失自定義屬性
public class DataGridViewRadioButtonColumnEx : DataGridViewColumn
{
public DataGridViewRadioButtonColumnEx()
{
this.CellTemplate = new DataGridViewRadioButtonCell();
this.ReadOnly = true;
}
}
public delegate void RadioButtonClickedHandler(bool state);
public class DataGridViewRadioButtonCellEventArgs : EventArgs
{
bool _bChecked;
public DataGridViewRadioButtonCellEventArgs(bool bChecked)
{
_bChecked = bChecked;
}
public bool Checked
{
get { return _bChecked; }
}
}
public class DataGridViewRadioButtonCell : DataGridViewTextBoxCell
{
Point radioButtonLocation;
Size radioButtonSize;
bool _checked = false;
public bool Checked
{
get { return _checked; }
set { _checked = value; }
}
string _groupName = "";
public string GroupName
{
get
{
return _groupName;
}
set
{
_groupName = value;
}
}
Point _cellLocation = new Point();
System.Windows.Forms.VisualStyles.RadioButtonState _cbState = System.Windows.Forms.VisualStyles.RadioButtonState.UncheckedNormal;
public event RadioButtonClickedHandler OnRadioButtonClicked;
public DataGridViewRadioButtonCell()
{
}
protected override void Paint(System.Drawing.Graphics graphics, System.Drawing.Rectangle clipBounds, System.Drawing.Rectangle cellBounds, int rowIndex, DataGridViewElementStates dataGridViewElementState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle, DataGridViewPaintParts paintParts)
{
base.Paint(graphics, clipBounds, cellBounds, rowIndex, dataGridViewElementState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, paintParts);
Point p = new Point();
Size s = RadioButtonRenderer.GetGlyphSize(graphics, System.Windows.Forms.VisualStyles.RadioButtonState.UncheckedNormal);
p.X = cellBounds.Location.X + (cellBounds.Width/2) - (s.Width/2);
p.Y = cellBounds.Location.Y + (cellBounds.Height/2) - (s.Height/2);
_cellLocation = cellBounds.Location;
radioButtonLocation = p;
radioButtonSize = s;
if (_checked)
_cbState = System.Windows.Forms.VisualStyles.RadioButtonState.CheckedNormal;
else
_cbState = System.Windows.Forms.VisualStyles.RadioButtonState.UncheckedNormal;
RadioButtonRenderer.DrawRadioButton(graphics, radioButtonLocation, _cbState);
}
protected override void OnMouseClick(DataGridViewCellMouseEventArgs e)
{
Point p = new Point(e.X + _cellLocation.X, e.Y + _cellLocation.Y);
if (p.X >= radioButtonLocation.X && p.X <= radioButtonLocation.X + radioButtonSize.Width && p.Y >= radioButtonLocation.Y && p.Y <= radioButtonLocation.Y + radioButtonSize.Height)
{
_checked = !_checked;
if (OnRadioButtonClicked != null)
{
OnRadioButtonClicked(_checked);
this.DataGridView.InvalidateCell(this);
}
}
base.OnMouseClick(e);
}
protected override void OnKeyUp(KeyEventArgs e, int rowIndex)
{
base.OnKeyUp(e, rowIndex);
if (e.KeyCode == Keys.Space)
{
_checked = true;
if (OnRadioButtonClicked != null)
{
OnRadioButtonClicked(_checked);
this.DataGridView.InvalidateCell(this);
}
}
}
/// <summary>
/// To Set the status of the Check-Box Header column
/// </summary>
/// <param name="flagIndicator">True - to mark checked state. False : To mark it as Unchecked.</param>
public void SetRadioButton(bool flagIndicator)
{
_checked = flagIndicator;
this.DataGridView.InvalidateCell(this);
}
}
它做工精細,我添加了名爲「組名」自定義屬性(用於現在的組單選按鈕屬於),但在運行時,某個地方,將被清除。
public class CustomDataGridView : DataGridView
{
protected override void OnCellClick(DataGridViewCellEventArgs e)
{
if ((e.RowIndex > -1) && (e.ColumnIndex > -1))
{
if ((this[e.ColumnIndex, e.RowIndex]).OwningColumn is DataGridViewRadioButtonColumnEx)
{
DataGridViewRadioButtonCell cell = this[e.ColumnIndex, e.RowIndex] as DataGridViewRadioButtonCell;
cell.Checked = !cell.Checked;
if (((DataGridViewRadioButtonCell)cell).Checked)
{
for (int i = 0; i < this.RowCount; i++)
{
if (cell.GroupName == (this[e.ColumnIndex, i] as DataGridViewRadioButtonCell).GroupName)
(this[e.ColumnIndex, i] as DataGridViewRadioButtonCell).Checked = false;
}
}
}
}
base.OnCellClick(e);
this.InvalidateColumn(e.ColumnIndex);
}
}
如何檢測屬性GroupName的清除位置?
謝謝。 Kendo
LE: 我發現它!我必須覆蓋clone方法:
public override object Clone()
{
var clone = (DataGridViewRadioButtonCell)base.Clone();
clone.Checked = _checked;
clone.GroupName = _groupName;
clone.CellType = _cellType;
return clone;
}
謝謝你,我已經完成了所有這些事情:) – Kendo
好吧,從你的例子中很難分辨出來,因爲Setter從來沒有被訪問過。你確定它首先被設置? – nuke
Setter只有在初始化時才被訪問。 'row.Cells.Add(new DataGridViewRadioButtonCell(){GroupName =「g1」});' – Kendo