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我有一个datagridview其中有2个datagridviewcomboboxcolumns。我通过编辑控件展示方法设置了selectedindexchanged方法(因为我已经读过它,应该这样做) 但是,由于某种原因,当第一次更改为第二个组合框时,此事件触发。SelectedIndexChanged事件也发射错误datagridviewcomboboxcell
我的问题是;是什么导致这种方法触发?我明确检查它是分配处理程序之前的第一列,但我仍然需要检查处理程序本身,因为至少在一次出现columnindex是1.
任何帮助将不胜感激。让我知道,如果我什么都不清楚。
private void AddLicenses_Load(object sender, EventArgs e)
{
this._data = this.GetData();
DataGridViewComboBoxColumn productColumn = new DataGridViewComboBoxColumn();
productColumn.DataPropertyName = "Name";
productColumn.HeaderText = "Product";
productColumn.Width = 120;
productColumn.DataSource = this._data.Select(p => p.Name).Distinct().ToList();
this.licenses.Columns.Add(productColumn);
DataGridViewComboBoxColumn distributorColumn = new DataGridViewComboBoxColumn();
distributorColumn.DataPropertyName = "Distributor";
distributorColumn.HeaderText = "Distributor";
distributorColumn.Width = 120;
this.licenses.Columns.Add(distributorColumn);
}
private void licenses_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
ComboBox productDropDown = (ComboBox)e.Control;
if (productDropDown != null && this.licenses.CurrentCell.ColumnIndex == 0)
{
productDropDown.SelectedIndexChanged -= productDropDown_SelectedIndexChanged;
productDropDown.SelectedIndexChanged += productDropDown_SelectedIndexChanged;
}
}
private void productDropDown_SelectedIndexChanged(object sender, EventArgs e)
{
if (this.licenses.CurrentCell.ColumnIndex == 0)
{
ComboBox productDropDown = (ComboBox)sender;
DataGridViewComboBoxCell distributorCell = (DataGridViewComboBoxCell)this.licenses.CurrentRow.Cells[1];
distributorCell.Value = null;
distributorCell.DataSource = this._data.Where(p => p.Name == (string)productDropDown.SelectedValue).OrderBy(p => p.UnitPrice).Select(d => new EnLicense() { Distributor = d.Distributor, UnitPrice = d.UnitPrice }).ToList();
distributorCell.ValueMember = "Distributor";
distributorCell.DisplayMember = "DistributorDisplay";
}
}