Question

我想知道如何在我使用查询的两个日期之间选择数据，但我得到空数据请帮助我我尝试过：

DataSet dsa = new DataSet();
DataTable dt1 = new DataTable();
dsa.Tables.Add(dt1);
OleDbDataAdapter da = new OleDbDataAdapter();
da = new OleDbDataAdapter("SELECT [Column1],[Column2],[Column3],[Date],[Receipt No],[Delivery Person] from [Total] Where [Date] between " + dateTimePicker2.Value.ToShortDateString() + " AND #" + dateTimePicker3.Value.ToShortDateString() + "#", VCON);
da.Fill(dt1);

Answer 1

像史蒂夫说的那样，你可以使用如下参数：

DataSet dsa = new DataSet();
DataTable dt1 = new DataTable();
dsa.Tables.Add(dt1);
OleDbDataAdapter da = new OleDbDataAdapter();
da = new OleDbDataAdapter("SELECT [Column1],[Column2],[Column3],[Date],[Receipt No],[Delivery Person] from [Total] Where [Date] between @DateStart AND @DateEnd", VCON);
da.SelectCommand.Parameters.AddWithValue("@DateStart", dateTimePicker2.Value);
da.SelectCommand.Parameters.AddWithValue("@DateEnd", dateTimePicker3.Value);
da.Fill(dt1);

Answer 2

很明显，为什么你没有看到你要查询的数据而没有检索到任何结果... ...实际上两个选定日期之间是否有任何数据？

作为一个快速观察，你似乎错过了几个＆＃34;＃＆＃34; dateTimePicker2周围的字符：

"SELECT [Column1],[Column2],[Column3],[Date],[Receipt No],[Delivery Person] from [Total] Where [Date] between #" + dateTimePicker2.Value.ToShortDateString() + "# AND #" + dateTimePicker3.Value.ToShortDateString() + "#"

如何使用ms访问在C＃中的两个日期之间选择数据

2 个答案: