Question

我有一个包含很少列单元格的gridview。我想要的只是检查空单元格并默认写入null。如果某些列未填充。我想要一个默认的空文本到特定的单元格

我试图创造这样的东西，但它不起作用，因为我不知道我怎么能进一步发展

          private void Gridview_Output_CellFormatting_1(object sender, DataGridViewCellFormattingEventArgs e)
         { 
            string _Car = string.Empty;
            string _Dealer = string.Empty;
            string _Model = string.Empty;
            int gridcount = Gridview.Rows.Count;
            for (int i = 0; i < gridcount; i++)
            {
                _Car = "";
                _Dealer = "";
                _Model = "";

                if (Gridview.Rows[i].Cells[1].Value == DBNull.Value)
                {
                    _Car = "Null";
                }
                else
                {
                    _Car = Gridview.Rows[i].Cells[1].Value.ToString();
                }
                if (Gridview.Rows[i].Cells[2].Value == DBNull.Value)
                {
                    _Dealer = "Null";
                }
                else
                {
                    _Dealer = Gridview.Rows[i].Cells[2].Value.ToString();
                }
                if (Gridview.Rows[i].Cells[4].Value == DBNull.Value)
                {
                    _Model = "Null";
                }
                else
                {
                    _Model = Gridview.Rows[i].Cells[4].Value.ToString();
                }
            }
        }

Answer 1

        foreach (DataGridViewRow dr in dataGridView1.Rows)
        {
            if (!dr.IsNewRow)
            {
                for (int c = 0; c <= dr.Cells.Count - 1; c++)
                {
                    if (dr.Cells[c].Value == null)
                    {
                        dr.Cells[c].Value = "NULL TEXT";
                    }
                }
            }
        }

Answer 2

您正在寻找DataGridView的{{1}}事件。尝试这样的事情：

CellFormatting

如有必要，您还可以使用private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) { if (string.IsNullOrEmpty(e.Value as string)) { e.Value = "NULL"; e.FormattingApplied = true; } }属性添加列条件。

如果datagridview列为空，则显示Null

2 个答案: