我试图从文本框中获取日期时间,它已经准备好了 MySql 日期时间的格式。DB中的列也是DateTime格式。
但是,当我按下按钮将日期保存在数据库中时,整行将被清空。
我在数据库中尝试了不同的格式和数据类型,没有任何效果
private void button4_Click(object sender, EventArgs e)
{
MySqlConnection conn = DBUtils.GetDBConnection();
conn.Open();
string startzeit = textBoxstartzeit.Text.ToString();
DateTime start = DateTime.Parse(startzeit);
string stopzeit = textBoxstopzeit.Text.ToString();
DateTime stop = DateTime.Parse(stopzeit);
string pstartzeit = textBoxstopzeit.Text.ToString();
DateTime pstart = DateTime.Parse(pstartzeit);
string pstopzeit = textBoxstopzeit.Text.ToString();
DateTime pstop = DateTime.Parse(pstopzeit);
MySqlCommand cmdnew = conn.CreateCommand();
cmdnew.CommandType = CommandType.Text;
cmdnew.CommandText = "UPDATE arbeitszeiten SET astart = '" + start + "', astop = '" + stop + "', pstart = '" + pstart + "', pstop = '" + pstop + "' WHERE id = '" + dataGridView.CurrentCell.Value + "'";
cmdnew.ExecuteNonQuery();
conn.Close();
}
private void dataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
{
try
{
MySqlConnection conn = DBUtils.GetDBConnection();
conn.Open();
MySqlCommand feedstartzeit = conn.CreateCommand();
feedstartzeit.CommandText = "SELECT astart FROM arbeitszeiten WHERE id = '" + dataGridView.CurrentCell.Value + "'";
DateTime start = Convert.ToDateTime(feedstartzeit.ExecuteScalar());
textBoxstartzeit.Text = start.ToString("yyyy-MM-dd HH:mm:ss");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Bitte ID auswählen", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
Button4 是上传新数据,dataGridView 部分用预先格式化的日期时间填充文本框,稍后由 Button4 上传
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