/// <summary>
/// 得到条件语句
/// </summary>
/// <param name="filter">过滤器</param>
/// <returns></returns>
internal virtual string GetSqlSign(AndOrQueryFilter filter)
{
StringBuilder builder = new StringBuilder();
int index = 0;
builder.Append(" ( ");
foreach (var item in filter.Filters)
{
if (index != 0)
{
builder.Append(" " + filter.FilterAndOrType.ToString() + " ");
}
string str = string.Empty;
if (item is QueryFilter)
{
str = GetSqlSign(item as QueryFilter);
}
if (item is AndOrQueryFilter)
{
str = GetSqlSign(item as AndOrQueryFilter);
}
builder.Append(str);
index++;
}
builder.Append(" ) ");
return(builder.ToString());
}
public QueryFilterBase ToFilters()
{
var fitler = new AndOrQueryFilter()
{
FilterAndOrType = FilterAndOrType, Filters = Filters
};
return(fitler);
}