protected virtual object Append(object[] args)
{
if (args == null || args.Length <= 0)
{
return(null);
}
//第一个参数为LinqDLR2SqlWhereOperator，后面参数为string
var where = args[0];
if (where is LinqDLR2SqlWhereOperator)
{
using (var lwhere = (LinqDLR2SqlWhereOperator) where)
{
var conditions = new Dictionary <string, object>();
foreach (var c in lwhere.ConditionValues)
{
conditions.Add(c.Key, c.Value);
}
var appendstr = "";
for (int i = 1; i < args.Length; i++)
{
if (args[i] is string)
{
appendstr += args[i];
}
}
var newwhere = new LinqDLR2SqlWhereOperator(lwhere.Result + appendstr, conditions);
return(newwhere);
}
}
else
{
return(where);
}
}
/// <summary>
/// 执行linqDLR2Sql的where操作
/// </summary>
/// <typeparam name="TSource"></typeparam>
/// <param name="source"></param>
/// <param name="predicate"></param>
/// <returns></returns>
public static LinqDLR2Sql <TSource> Where <TSource>(this LinqDLR2Sql <TSource> source, Func <TSource, LinqDLR2SqlWhereOperator> predicate)
{
LinqDLR2SqlWhereOperator op = predicate.Invoke(source.Item);
source.DoWhere(op);
return(source);
}
protected override object MetaEqual(object v)
{
var re = "";
if (v == null || v == DBNull.Value)
{
re = $"{ColumnExpress} {IsNull}";
}
else
{
re = $"{ColumnExpress}{EqualFlag}{Convert2Express(v)}";
}
var rtn = new LinqDLR2SqlWhereOperator(re, ConditionValues);
return(rtn);
}
