/// <summary>
/// Visits the Linq aggregate methods.
/// </summary>
/// <param name="expression">The expression.</param>
/// <param name="aggregateName">Name of aggreage method.</param>
protected virtual Expression VisitAggregate(MethodCallExpression expression, string aggregateName)
{
LinqStringBuilder.Append($"{aggregateName}(");
this.Visit(StripQuotes(expression.Arguments[1]));
LinqStringBuilder.Append(")");
SelectExpression.SetColumnsExpression(new ColumnsExpression(LinqStringBuilder.ToString()));
LinqStringBuilder.Clear();
return(expression);
}
private Expression VisitOrderBy(MethodCallExpression expression, OrderType orderType)
{
var lambda = (LambdaExpression)StripQuotes(expression.Arguments[1]);
var ret = Visit(lambda);
Orders.Add(LinqStringBuilder.ToString() + " " + (orderType == OrderType.Ascending ? "ASC" : "DESC"));
LinqStringBuilder.Clear();
return(ret);
}
private Expression VisitOrderBy(MethodCallExpression expression, OrderType orderType)
{
var lambda = (LambdaExpression)StripQuotes(expression.Arguments[1]);
var ret = this.Visit(lambda);
_orders.Add(new OrderBy()
{
ColumnaName = LinqStringBuilder.ToString(), Type = orderType
});
LinqStringBuilder.Clear();
return(ret);
}
/// <summary>
/// Visits the Linq Take method.
/// </summary>
/// <param name="expression">The expression.</param>
/// <exception cref="System.NotSupportedException">If call of Take method is not supported.</exception>
protected virtual Expression VisitTake(MethodCallExpression expression)
{
this.Visit(StripQuotes(expression.Arguments[1]));
LinqStringBuilder.Clear();
try
{
_top = (int)LinqParameters.GetParams().First();
LinqParameters = new Parameters();
return(expression);
}
catch (Exception e)
{
throw new NotSupportedException("This call of Take method is not supported", e);
}
}
/// <summary>
/// Visits the Linq Take method.
/// </summary>
/// <param name="expression">The expression.</param>
/// <exception cref="System.NotSupportedException">If call of Take method is not supported.</exception>
protected virtual Expression VisitTake(MethodCallExpression expression)
{
Visit(StripQuotes(expression.Arguments[1]));
LinqStringBuilder.Clear();
try
{
_top = (int)LinqParameters.GetParams().First();
LinqParameters = new Parameters();
return(expression);
}
catch (Exception ex)
{
throw new NotSupportedException(Resources.ThisCallOfTakeMethodIsNotSupported, ex);
}
}
