在Dapper中有一个ExecuteScalar

Question

看起来Dapper中有一个ExecuteScalar ......

http://code.google.com/p/dapper-dot-net/issues/attachmentText?id=22&aid=220000000&name=ExecuteScalar.cs&token=9e2fd8899022f507b140ffb883c60e34

是否重命名或删除了ExecuteScalar？

现在可以使用.Query或.Query＆lt; T＆gt;？

来实现

Answer 1

在1.28中添加了ExecuteScalar：https://www.nuget.org/packages/Dapper

Answer 2

我能够调用ExecuteScalar＆lt; T>版本1.42.0

    public Boolean BeforeToday(DateTime dateInQuestion)
    {
        try
        {
            using (var conn = new SqlConnection(ConnectionString))
            {
                String sql = @"SELECT CONVERT(bit, CASE WHEN getdate() > @dateParameter THEN 1 ELSE 0 END) AS BeforeToday";

                var result = conn.ExecuteScalar<Boolean>(sql, new { dateParameter = dateInQuestion });

                return result;
            }
        }
        catch (Exception)
        {
            return dateInQuestion < DateTime.Now;
        }
    }