c# - 如何根据 Combobox 的值更改 DataGridView 单元格颜色？

Question

我有一个数据 GridView 如下:

我愿意:

• 加载表单时，如果 Gender 列的值为 Male，则 Name 列对应的颜色单元格将为 White

• 如果更改 Gender 列的值:Male → Female，Name 列的颜色单元格将为 DarkGray，否则，如果更改 Gender 列的值:Female → Male，Name 列的颜色单元格将为白色

我试过了，但我做不到:

    private void dataGridView_CurrentCellDirtyStateChanged(object sender, EventArgs e)
    {
        DataGridView dgv = sender as DataGridView;
        DataGridViewCell cell = dgv.CurrentCell;

        if (dgv.Rows[cell.RowIndex].Cells["Gender"].Value.ToString().Trim() == "Male")
        {
            // Male
            dgv.Rows[cell.RowIndex].DefaultCellStyle.BackColor = Color.White;
        }
        else
        {
            // Female
            dgv.Rows[cell.RowIndex].DefaultCellStyle.BackColor = Color.DarkGray;
        }
    }

或者:

    private void dataGridView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
    {
        DataGridView dgv = sender as DataGridView;

        if (dgv.Columns[e.ColumnIndex].Name.Equals("Gender"))
        {
            if (e.Value != null && e.Value.ToString().Trim() == "Male")
            {
                e.CellStyle.BackColor = Color.White;
            }
            else
            {
                e.CellStyle.BackColor = Color.DarkGray;
            }
        }

        //if (dgv.Rows[e.RowIndex].Cells["Gender"].Value.ToString().Trim() == "Male")
        //{
        //    e.CellStyle.BackColor = Color.White;
        //}
        //else
        //{
        //    e.CellStyle.BackColor = Color.DarkGray;
        //}
    }

关于这些的任何提示都会有很大帮助。提前致谢。

Answer 1

要更改背景颜色，您必须订阅 CellFormatting 事件。然后将此代码添加到事件处理程序中:

private void dataGridView_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
    DataGridView dgv = sender as DataGridView;

    if (dgv.Columns[e.ColumnIndex].Name.Equals("Gender"))
    {
        if (e.Value != null && e.Value.ToString().Trim() == "Male")
        {
            dgv.Rows[e.RowIndex].Cells["name"].Style.BackColor = Color.White;
        }
        else
        {
            dgv.Rows[e.RowIndex].Cells["name"].Style.BackColor = Color.DarkGray;
        }
    }

}

要在您的 DataGridViewComboBoxCell 中选择新值时进行验证，请订阅 CurrentCellDirtyStateChanged 事件并在其处理程序中尝试此代码:

private void dataGridView_CurrentCellDirtyStateChanged(object sender, EventArgs e)
{
    DataGridView dgv = sender as DataGridView;
    DataGridViewCell cell = dgv.CurrentCell;
    if (cell is DataGridViewComboBoxCell)
    {
        dgv.CommitEdit(DataGridViewDataErrorContexts.Commit);
        dgv.EndEdit();
    }
}