C#accessSQL查询日期的代码！

C# access SQL查询日期的代码！

注意：ACCESS里面Date类型为形如：2010-4-8 的长日期类型

private void FindButton_Click(object sender, EventArgs e)
{
OleDbConnection con = new OleDbConnection(dbConnetion.connetion);//在dbConnetion.cs中有专门的数据打开类
string cmdStr;
if(Hour==0)
{
cmdStr = "select * from MeteorologyData where Date=" + this.FindDate.ToOADate();

}
else
{
cmdStr = "select * from MeteorologyData where Date=" + this.FindDate.ToOADate() + " and Time=" + Hour;
}
con.Open();

OleDbDataAdapter adp = new OleDbDataAdapter(cmdStr, con);
ds = new DataSet();
ds.Clear();
adp.Fill(ds);
string[] mytitle ={ "日期", "时间段", "有效能见度", "海面能见度", "天气现象", "总云量", "中低云量和", "低云量", "云状编码", "云状", "风向", "风速", "气温", "绝对湿度", "相对湿度", "露点", "本站气压", "海平面气压", "降水量", "波浪", "记录人编号" };
for (int i = 0; i {
ds.Tables[0].Columns[i].ColumnName = mytitle[i];
}

dataGridView1.DataSource = ds.Tables[0].DefaultView;

// dataGridView1.Capture = "共有" + ds.Tables[0].Rows.Count.ToString()+ "条记录";
con.Close();
}