/// <summary>
/// 判断是否存在
/// </summary>
public static bool Has(this MySqlConnection conn, ZinSQL sql)
{
var fields = sql.GetFields();
var count = conn.ExecuteScalar(string.Format("select COUNT({1}) from {0} where {2} = {3}", sql.TableName, fields, fields, sql.GetValues()));
return(Convert.ToInt32(count) > 0);
}
/// <summary>
/// 计数
/// </summary>
public static int Count(this MySqlConnection conn, ZinSQL sql, List <MySqlParameter> paramList)
{
var sqlStr = string.Empty;
if (string.IsNullOrEmpty(sql.Where))
{
sqlStr = string.Format("select count({1}) from {0}", sql.TableName, sql.GetFields());
}
else
{
sqlStr = string.Format("select count({1}) from {0} where {2}", sql.TableName, sql.GetFields(), sql.Where);
}
return(conn.ExecuteScalar(sqlStr, paramList).ToInt());
}
/// <summary>
/// 获取
/// </summary>
public static List <object[]> Get(this MySqlConnection conn, ZinSQL sql, List <MySqlParameter> paramList)
{
var sqlStr = string.Empty;
if (string.IsNullOrEmpty(sql.Where))
{
sqlStr = string.Format("select {1} from {0}", sql.TableName, sql.GetFields());
}
else
{
sqlStr = string.Format("select {1} from {0} where {2}", sql.TableName, sql.GetFields(), sql.Where);
}
return(conn.ExecuteQuery(sqlStr, paramList));
}
/// <summary>
/// 插入信息
/// </summary>
public static void Insert(this MySqlConnection conn, ZinSQL sql, List <MySqlParameter> paramList)
{
conn.ExecuteNonQuery(string.Format("insert into {0}({1}) values({2})", sql.TableName, sql.GetFields(), sql.GetValues()), paramList);
}
public static object GetScalarResult(this MySqlConnection conn, ZinSQL sql, List <MySqlParameter> paramList)
{
if (string.IsNullOrEmpty(sql.Where))
{
return(conn.ExecuteScalar(string.Format("select {1} from {0}", sql.TableName, sql.GetFields()), paramList));
}
else
{
return(conn.ExecuteScalar(string.Format("select {1} from {0} where {2}", sql.TableName, sql.GetFields(), sql.Where), paramList));
}
}