Question

当当前行的两列（要添加的行）具有数据时，以下代码应该将DataGridView数据源写入分隔的文本文件。当触发CellEndEdit事件时，是否检查当前行的两列是否具有数据。

实际上，当初始当前行的两列有数据时，初始当前行不会写入分隔文本文件。
当后续当前行的两列包含数据时，后续当前行将写入分隔文本文件。
永远不会将初始当前行写入分隔的文本文件。

如何按预期将当前初始行写入目标？

private void dataGridRecord_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    var currentRow = dataGridRecord.Rows[e.RowIndex];
    if (currentRow.Cells.Count > 0)
    {
        bool partialStringRecord = false;

        // Determine how many of the row's cells are empty
        int emptyCells = currentRow.Cells.Cast<DataGridViewCell>()
            .Count(cell => cell.Value == null || String.IsNullOrWhiteSpace(cell.Value.ToString()));

        // If only one of the two cells is empty, the record is incomplete
        if (emptyCells == 1) partialStringRecord = true;

        // If the record is incomplete, prevent adding new rows...
        if (partialStringRecord)
        {
            dataGridRecord.AllowUserToAddRows = false;
            return;
        }

        // ...until the columns of the current row have data
        dataGridRecord.AllowUserToAddRows = true;

        // Write data table to file
        var table = (DataTable)dataGridRecord.DataSource;
        var records = FileManager.ToStringRecordList(table);
        FileManager.SaveCsvFile(records, _fileName);
    }
}

Answer 1

这是我提出的解决方案：

private void dataGridRecord_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    var rows = dataGridRecord.Rows;
    var emptyCells = rows[e.RowIndex].Cells.Cast<DataGridViewCell>()
        .Count(cell => cell.Value == null || String.IsNullOrWhiteSpace(cell.Value.ToString()));

    // if there are no partial records
    if (emptyCells == 0)
    {
        for (var i = 0; i < rows.Count; i++)
        {
            rows[i].DefaultCellStyle.BackColor = Color.White;
            rows[i].ReadOnly = false;
        }

        FileManager.SaveDataTableToCsvFile(dataGridRecord, _fileName);
    }
    // if there are partial records
    else
    {
        if (e.ColumnIndex != 0)
        {
            for (var i = 0; i < rows.Count; i++)
            {
                // highlight current row and disable other rows
                if (rows[i] == rows[e.RowIndex])
                {
                    rows[i].DefaultCellStyle.BackColor = Color.LightCoral;
                    rows[i].ReadOnly = false;
                }
                else if (rows[i] != rows[e.RowIndex])
                {
                    rows[i].DefaultCellStyle.BackColor = Color.LightGray;
                    rows[i].ReadOnly = true;
                }
            }
        }
        else
        {
            FileManager.SaveDataTableToCsvFile(dataGridRecord, _fileName);
        }
    }
}

加载数千条记录时可能很笨重。我们会看到。

DataGridView：如何将第一个添加的行写入文件？

1 个答案: