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我有一个DataGridview有几列,其中一列是DataGridViewComboBoxColumn。若要动态更改DataGridViewComboBoxCell颜色(样式)
这种情况是,当用户从组合框中选择一些值(选择索引> 0)时,所选单元格的整行将显示为白色。如果用户选择组合框的空值(选定索引为0),则整行将以黄色显示,并且此组合框单元应显示为红色。
我能够实现显示除了组合框以外的黄色整行。
private void grdCurve_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
//for datatype column
if (grdCurve.CurrentCell.ColumnIndex == DATATYPE_COLUMN_INDEX)
{
// Check box column
ComboBox comboBox = e.Control as ComboBox;
comboBox.SelectedIndexChanged -= new EventHandler(comboBox_SelectedIndexChanged);
comboBox.SelectedIndexChanged += new EventHandler(comboBox_SelectedIndexChanged);
}
}
void comboBox_SelectedIndexChanged(object sender, EventArgs e)
{
if (selectedIndex >= 0)
{
if (!ValidateMnemonic(mnRow, row))
{
MarkInvalidRow(row);
}
else
{
MarkValidRow(row);
}
}
}
private void MarkInvalidRow(DataGridViewRow row)
{
DataGridViewCellStyle style = new DataGridViewCellStyle();
if (m_InvalidRowTable.Count > 0)
{
if (m_InvalidRowTable.ContainsKey(row.Index))
{
int col = Convert.ToInt32(m_InvalidRowTable[row.Index]);
DataGridViewCell cell = row.Cells[col];
MarkInvalidRowColor(row);
style.BackColor = Color.Red;
style.SelectionBackColor = Color.Red;
cell.Style = style;
if (grdCurve.CurrentCell is DataGridViewComboBoxCell)
{
grdCurve.CurrentCell.Style = style;
}
}
else
{
MarkInvalidRowColor(row);
}
}
else
{
MarkInvalidRowColor(row);
}
m_InvalidRowTable.Remove(row.Index);
}
private void grdCurve_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
//do nothing
}
private void grdCurve_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
if (grdCurve.CurrentCell is DataGridViewCheckBoxCell)
grdCurve.CommitEdit(DataGridViewDataErrorContexts.Commit);
if (grdCurve.CurrentCell is DataGridViewComboBoxCell && grdCurve.IsCurrentCellDirty)
grdCurve.CommitEdit(DataGridViewDataErrorContexts.Commit);
grdCurve.EndEdit();
}
当我将组合框中的项目更改为空时,我预计组合框将被标记为红色。 但是,它显示为白色,当我点击其他一些单元格时,红色将在组合框单元格中更新。
请帮忙。
感谢, 普拉萨德