/// <summary> /// 判断字段模型是否是索引 /// </summary> /// <param name="field"></param> /// <returns>如果该字段模型是索引则返回索引信息,否则返回null</returns> public static IDataModelFieldIndex IsIndexKey(this IDataFieldModel field) { return(DataModelHelper.GetExtendProperty_IndexKey(field.InnerExtend)); }