Всем привет
в общем переопределил класс столбца у DataGridView
| Код |
public class SDataGridComboBoxColumn : DataGridTextBoxColumn
{
public NoKeyUpCombo ColumnComboBox;
private System.Windows.Forms.CurrencyManager _source;
private int _rowNum;
private bool _isEditing;
public static int _RowCount;
public SDataGridComboBoxColumn() : base()
{
_source = null;
_isEditing = false;
_RowCount = -1;
ColumnComboBox = new NoKeyUpCombo();
ColumnComboBox.DropDownStyle = ComboBoxStyle.DropDownList;
ColumnComboBox.Leave += new EventHandler(LeaveComboBox);
// ColumnComboBox.Enter += new EventHandler(ComboMadeCurrent);
ColumnComboBox.SelectionChangeCommitted += new EventHandler(ComboStartEditing);
}
private void ComboStartEditing(object sender, EventArgs e)
{
_isEditing = true;
base.ColumnStartedEditing((Control)sender);
}
private void HandleScroll(object sender, EventArgs e)
{
if (ColumnComboBox.Visible)
ColumnComboBox.Hide();
}
private void LeaveComboBox(object sender, EventArgs e)
{
if (_isEditing)
{
SetColumnValueAtRow(_source, _rowNum, ColumnComboBox.Text);
_isEditing = false;
Invalidate();
}
ColumnComboBox.Hide();
this.DataGridTableStyle.DataGrid.Scroll -= new EventHandler(HandleScroll);
}
protected override void Edit(System.Windows.Forms.CurrencyManager source, int rowNum, System.Drawing.Rectangle bounds, bool readOnly, string instantText, bool cellIsVisible)
{
base.Edit(source, rowNum, bounds, readOnly, instantText, cellIsVisible);
_rowNum = rowNum;
_source = source;
ColumnComboBox.Parent = this.TextBox.Parent;
ColumnComboBox.Location = this.TextBox.Location;
ColumnComboBox.Size = new System.Drawing.Size(this.TextBox.Size.Width, ColumnComboBox.Size.Height);
ColumnComboBox.SelectedIndex = ColumnComboBox.FindStringExact(this.TextBox.Text);
ColumnComboBox.Text = this.TextBox.Text;
this.TextBox.Visible = false;
ColumnComboBox.Visible = true;
this.DataGridTableStyle.DataGrid.Scroll += new EventHandler(HandleScroll);
ColumnComboBox.BringToFront();
ColumnComboBox.Focus();
}
protected override bool Commit(System.Windows.Forms.CurrencyManager dataSource, int rowNum)
{
if (_isEditing)
{
_isEditing = false;
SetColumnValueAtRow(dataSource, rowNum, ColumnComboBox.Text);
}
return true;
}
protected override void ConcedeFocus()
{
Console.WriteLine("ConcedeFocus");
base.ConcedeFocus();
}
protected override object GetColumnValueAtRow(System.Windows.Forms.CurrencyManager source, int rowNum)
{
object s = base.GetColumnValueAtRow(source, rowNum);
System.Data.DataView dv = (System.Data.DataView)this.ColumnComboBox.DataSource;
int rowCount = dv.Count;
int i = 0;
while (i < rowCount)
{
if (s.Equals(dv[i][this.ColumnComboBox.ValueMember]))
break;
++i;
}
if (i < rowCount)
return dv[i][this.ColumnComboBox.DisplayMember];
return DBNull.Value;
}
protected override void SetColumnValueAtRow(System.Windows.Forms.CurrencyManager source, int rowNum, object value)
{
object s = value;
System.Data.DataView dv = (System.Data.DataView)this.ColumnComboBox.DataSource;
int rowCount = dv.Count;
int i = 0;
while (i < rowCount)
{
if (s.Equals(dv[i][this.ColumnComboBox.DisplayMember]))
break;
++i;
}
if (i < rowCount)
s = dv[i][this.ColumnComboBox.ValueMember];
else
s = DBNull.Value;
base.SetColumnValueAtRow(source, rowNum, s);
}
}
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На форме имеется компонент DataGridView, но никак не могу сообразить как переопределить один из имеющихся столбцов c этим классом. |