/// <summary> /// 获取列 /// </summary> /// <typeparam name="TEntity">实体类型</typeparam> /// <param name="column">列名</param> private string GetColumn <TEntity>(Expression <Func <TEntity, object> > column) => GetColumn(typeof(TEntity), _resolver.GetColumn(column));
/// <summary>
/// 设置Is Not Null条件
/// </summary>
/// <param name="expression">列名表达式</param>
public void IsNotNull <TEntity>(Expression <Func <TEntity, object> > expression) where TEntity : class
{
var column = _helper.GetColumn(_resolver.GetColumn(expression), typeof(TEntity));
IsNotNull(column);
}
/// <summary>
/// 求总行数
/// </summary>
/// <typeparam name="TEntity">实体类型</typeparam>
/// <param name="expression">列名表达式</param>
/// <param name="columnAlias">列别名</param>
public void Count <TEntity>(Expression <Func <TEntity, object> > expression, string columnAlias = null) where TEntity : class
{
var column = _resolver.GetColumn(expression);
Count(column, columnAlias);
}
/// <summary>
/// 获取处理后的列名
/// </summary>
/// <param name="expression">表达式</param>
/// <param name="type">实体类型</param>
/// <returns></returns>
public string GetColumn(Expression expression, Type type)
{
return(GetColumn(_resolver.GetColumn(expression, type), type));
}
/// <summary>
/// 设置查询条件
/// </summary>
/// <param name="expression">列名表达式</param>
/// <param name="value">值</param>
/// <param name="operator">运算符</param>
public void Where <TEntity>(Expression <Func <TEntity, object> > expression, object value, Operator @operator = Operator.Equal) where TEntity : class
{
Where(GetColumn(_resolver.GetColumn(expression), typeof(TEntity)), value, @operator);
}