从特定日期中选择数据

Question

我使用MS Access作为我的数据库，c#作为前端。我想从任何月份和年份的特定日期获取数据。我得到的结果只有两位数日期（10,11,12 .....）但不是单位数（01,02,03，.......，09）

这是代码

string d = dateTimePicker1.Value.Date.ToString("dd");
string constr = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=|DataDirectory|\Auto_Finance.accdb;Persist Security Info=False;";
OleDbConnection con = new OleDbConnection(constr);
con.Open();
//string sql1 = @"select * from Party_Det order by PName asc where Loandate like '%'" + d + "'%' order by PName asc ";
//string sql1 = @"select * from Party_Det order by PName asc where Loandate like '*',@Loandate";// order by PName asc ";
//string sql1 = @"select * from Party_Det where Loandate like '*',@Loandate";// order by PName asc ";
string sql1 = @"select * from Party_Det where Day(Loandate)=@Loandate order by PName asc ";
OleDbCommand cmd1 = new OleDbCommand(sql1, con);
cmd1.Parameters.AddWithValue("@Loandate", d);
OleDbDataAdapter da = new OleDbDataAdapter(cmd1);
DataTable dt = new DataTable();
da.Fill(dt);
dataGridView1.DataSource = dt;
con.Close();

谢谢

Answer 1

如果我理解你的问题，你可以这样做：

string sql1 = @"select * from Party_Det where Day(Loandate)=@Loandate order by PName asc ";