小编cod*_*ice的帖子

我试图将日期作为字符串存储在表中，但日期不断转换为与日期相关的负 4 位数字，我一生都无法弄清楚我在哪里弄乱。请注意，我使用的是 C# 和 SQL Server 的组合

foreach(DataRow dr in dt.Rows)
{
    int qty = 0;
    string pname = "";

    SqlCommand cmd3 = con.CreateCommand();
    cmd3.CommandType = CommandType.Text;
    cmd3.CommandText = "insert into order_item values('" + orderid.ToString() + "','" + dr["product"].ToString() + "'," +
        "'" + dr["price"].ToString() + "','" + dr["qty"].ToString() + "','"+ dr["total"].ToString() + "')";
    cmd3.ExecuteNonQuery();

    qty = Convert.ToInt32(dr["qty"].ToString());
    pname = dr["product"].ToString();

    SqlCommand cmd6 = con.CreateCommand();
    cmd6.CommandType = CommandType.Text;
    cmd6.CommandText = "update stock set product_qty = product_qty - " + …