如何确保用户在Datagridview中选择不同的comobox选项 [英] how to ensure that user select different comobox option in Datagridview

问题描述

我有一个名为ColumnLocationDemo的组合框列的gridview。我想确保用户每次从comobox中选择不同的选项。我正在尝试这个代码消息框出现，但不知道如何更改columnLocationDemo的索引

i have gridview with a combo box column Named ColumnLocationDemo. I want to ensure that user every time selected distinct option from comobox. i am trying this code message box appearing but dont know how to change the index of columnLocationDemo

private void dataGridView1_RowValidating(object sender, DataGridViewCellCancelEventArgs e)
        {
            string str1 = dataGridView1.CurrentRow.Cells[1].Value.ToString();
            for (int i = 0; i < dataGridView1.Rows.Count - 2; i++)
            {
                string str = dataGridView1.Rows[i].Cells[1].Value.ToString();
                if (str==str1)
                {
                    MessageBox.Show("same occur");
                    ColumnLocationDemo
                }
            }


        }

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