[英]select data from ms access database by date in c#
我想从C#中的ms Access数据库中选择数据,我使用此查询
da = new OleDbDataAdapter(
"SELECT [Column1],[Column2],[Column3],[Date] from [Total] Where [Date] between #"
+ dateTimePicker2.Value.ToString()
+ "# AND #"
+ dateTimePicker3.Value.ToString()
+ "#",
VCON);
返回我为空,请帮助我。
您必须将日期格式设置为:
dateTimePicker2.Value.ToString("yyyy/MM/dd")
您也可以:
da = new OleDbDataAdapter(
"SELECT [Column1],[Column2],[Column3],[Date] from [Total] Where [Date] between "
+ dateTimePicker2.Value.ToString("#yyyy/MM/dd#")
+ " AND "
+ dateTimePicker3.Value.ToString("#yyyy/MM/dd#") ,
VCON);
但是,我建议您使用Parameter避免SQL注入,如下所示:
string query = "SELECT [Column1],[Column2],[Column3],[Date] from [Total] Where [Date] " +
"BETWEEN @startDate AND @endDate";
OleDbCommand cmd = new OleDbCommand(query, VCON);
cmd.Parameters.AddWithValue("@startDate ", DbType.DateTime).Value =
dateTimePicker1.Value.ToString("yyyy/MM/dd");
cmd.Parameters.AddWithValue("@endDate ", DbType.DateTime).Value =
dateTimePicker2.Value.ToString("yyyy/MM/dd");
da = new OleDbDataAdapter(cmd);
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