public static string GetFilterString(this FilterScheme scheme, Context ctx, FormMetadata metadata)
{
if (scheme.Scheme.IsNullOrEmptyOrWhiteSpace())
{
return(string.Empty);
}
//字段比较条件元数据。
var filterMetadata = FormMetaDataCache.GetCachedFilterMetaData(ctx);
//过滤模型：解析过滤方案
ListFilterModel filterModel = new ListFilterModel();
filterModel.FilterObject.FilterMetaData = filterMetadata;
filterModel.SetContext(ctx, metadata.BusinessInfo, metadata.BusinessInfo.GetForm().GetFormServiceProvider());
filterModel.InitFieldList(metadata, null);
//把过滤方案的XML内容，反序列化为对象
DcxmlSerializer dcxmlSerializer = new DcxmlSerializer(new PreInsertDataDcxmlBinder());
SchemeEntity schemeEntity = dcxmlSerializer.DeserializeFromString(scheme.Scheme) as SchemeEntity;
//利用ListFilterModel, 翻译过滤条件
filterModel.FilterObject.Setting = schemeEntity.FilterSetting;
string statement = filterModel.FilterObject.GetFilterSQLString(ctx, TimeServiceHelper.GetSystemDateTime(ctx));
return(statement);
} //end metthod
public static object StringToDataEntity(IDataEntityType dt, string xml)
{
DcxmlSerializer serializer = new DcxmlSerializer(new IDataEntityType[] { dt });
return(serializer.DeserializeFromString(xml, null));
}