static string conStr = @"server=.;database=a;uid=sa;pwd=a;";
/// <summary>
/// ExecuteScalar
/// </summary>
/// <param name="sql">sql語句</param>
/// <param name="ps">SqlParameter</param>
/// <returns>查詢結果表中最左上角單元格的數據</returns>
private static object ExecuteScalar(string sql, params SqlParameter[] ps)
{
using (SqlConnection con = new SqlConnection(conStr))
{
using (SqlCommand cmd = new SqlCommand(sql, con))
{
cmd.Parameters.AddRange(ps);
con.Open();
return cmd.ExecuteScalar();
}
}
}
//新增一條信息 並返回插入後該數據的Id
public static int InsertModel<T>(T t)
where T : BaseModel, new()
{
//獲取類型
Type type=typeof(T);
//獲得字段列表
PropertyInfo[] Prop= type.GetProperties();
//拼接字符串
string sql = string.Format("insert into [{0}]({1}) values({2});select @@identity",
type.Name,
string.Join(",",Prop.Where(s=>s.Name!="Id").Select(s=>string.Format("[{0}]",s.Name))),
string.Join(",", Prop.Where(s => s.Name != "Id").Select(s => string.Format("@{0}", s.Name)))
);
SqlParameter[] ps = Prop.Where(s => s.Name != "Id").Select(s => new SqlParameter(string.Format("@{0}",s.Name),s.GetValue(t,null)??DBNull.Value)).ToArray();
return int.Parse(ExecuteScalar(sql,ps).ToString());
}