public static void Query <T>(string name)
{
//select * from admin
String sql = $"select * from {typeof(T).Name} where {typeof(T).GetProperty(name)} like '{name}'";
Sqlhelp.Query(sql);
}
public static DataTable Query <T>(int id)
{
//select * from admin
String sql = $"select * from {typeof(T).Name} where {typeof(T).GetProperty(id.ToString())} = '{id}'";
return(Sqlhelp.Query(sql, null));
}
public static DataTable Query <T>()
{
//select * from admin
String sql = $"select * from {typeof(T).Name}";
return(Sqlhelp.Query(sql, null));
}
public static int Add <T>(T t)
{
//String sql = $"insert into {typeof(T).Name} values";
//for(int i = 0; i < typeof(T).GetProperties().Length ;i++)
//{
// sql+=($" '{typeof(T).GetProperties()[i].GetValue(t,null)}',");
//}
//sql.Remove(sql.Length-1);
//sql += ")";
//Sqlhelp.AnModel(sql);
String sql = $"insert into {typeof(T).Name} values(";
foreach (var a in typeof(T).GetProperties())
{
sql += $"@{a.Name},";
}
sql.Remove(sql.Length - 1);
sql += ")";
SqlParameter[] param = new SqlParameter[typeof(T).GetProperties().Length - 1];
for (int i = 0; i < typeof(T).GetProperties().Length; i++)
{
param[i] = new SqlParameter($"{typeof(T).GetProperties()[i].Name}",
typeof(T).GetProperties()[i].GetValue(t, null));
}
return(Sqlhelp.AnModel(sql, param));
}
public static void Update <T>(int id, T t)
{
//UPDATE Customers SET cust_email = ' [email protected]' WHERE cust_id = '10000005';
String sql = $"update {typeof(T).Name} set ";
foreach (var item in typeof(T).GetProperties())
{
sql += $"{item.Name}={item.GetValue(t, null)},";
}
sql.Remove(sql.Length - 1);
sql += "where id=" + id + "";
Sqlhelp.AnModel(sql);
}
public static void Query <T>(bool l)
{
string sql = "";
//select * from admin
if (l)
{
sql = $"select * from {typeof(T).Name} order by updatetime";
Sqlhelp.Query(sql);
}
else
{
sql = $"select * from {typeof(T).Name} order by updatetime desc";
}
Sqlhelp.Query(sql);
}
public static int Del <T>(int id)
{
////delete from testss.dbo.test1 where id='12';
//String sql = $"delete from {typeof(T).Name} where";
//for (int i = 0; i < typeof(T).GetProperties().Length; i++)
//{
// if (typeof(T).GetProperties()[i].GetValue(t, null) != null)
// sql += ($"{typeof(T).GetProperties()[i].Name} = '{typeof(T).GetProperties()[i].GetValue(t, null)}',");
// continue;
//}
//sql.Remove(sql.Length - 1);
//sql += ")";
//Sqlhelp.AnModel(sql);
string sql = $"delete from {typeof(T).Name} where {typeof(T).GetProperties()[0].Name}=@{typeof(T).GetProperties()[0].Name}";
SqlParameter[] param =
{
new SqlParameter($"@{typeof(T).GetProperties()[0].Name}", id)
};
return(Sqlhelp.AnModel(sql, param));
}
