背景
两张表,分别是 :sys_tbl,和 sys_field,其中:sys_tbl 是系统所有表的信息,包含两个字段 :code(表名),name(表描述信息);sys_fld 是记录第张表中的字段 的名称(field)和描述信息(table) ,
截图如下:
sys_tbl


其中,字段 名称包含对其它名称(对象) 的引用,写法为:表名(去除下划线)_引用字段 ,如:einventory_cinvcode,就是对表 e_inventory 中字段 cinvcode的引用。
每张表都在系统 中对应有不同功能的js文件(模块)如: 编辑窗体(dialog类型),跨域选择窗体(field)类型等
需求
在一个综合的页面中,会对其它对象进行引用(依赖),而这种引用最终体现在对js文件的包含。同时被引用的js 文件(一级引用)还有自已关联对象(二级引用).....如此下去,直到N 级引用。
所以现在需要逐层找到对象的引用,直到最后不依赖任何对象为止,并把这些js文件生成引用包含路径(不重复)
分析
1、返回结果类型
得到这些js引用,不能重复,但是对象之间引用是可以存在交叉的,在整个引用链条上,同一个对象会被 多个对象引用,所以简单的字符串数组是避免不了重复的。但是在C#中的HashSet可以做到不重复,同时这个去重工作是自动完成的,所以存结果如果是简单的value类型,用 HashSet就可以,但是因为字段中表的信息已经被格式化过,所以还要把格式化之前的表名称取出与字段对应,所以需要一个key-value类型的数据 ,那就是 Dictionary<string, string> 了。
2、算法选择
因为查找引用,是层层进行的,而且下一层引用的要用到上一层的引用结果,所以这里选择递归算法
代码实现
声明一个全局变量,记录所有的表与字段的对应的数据,因为需要确保数据key 唯一性所以选择Dicctionary类型
- /// <summary>
- /// define the gloable parameter to save the rel obj data
- /// </summary>
- public static Dictionary<string, string> <strong>deepRef </strong>= new Dictionary<string, string>();
入口函数,完成准备工作,(数据库连接,参数准备)
- /// <summary>
- /// 通过表的字段 获取相关的引用字段依赖的对象 直到没有依赖为止
- /// </summary>
- /// <param name="headField">表字段列表</param>
- /// <returns></returns>
- public static Dictionary<string,string> getRelRef(List<IniItemsTableItem> headField)
- {
- HashSet<string> refset = new HashSet<string>();
- // HashSet<string> refset_result = new HashSet<string>();
- foreach (var item in headField)
- {
- if (!item.controlType.StartsWith("hz_"))// is not the field of reference
- {
- continue;
- }
- string[] fieldarr = item.dataIndex.Split('_');//the constructor is :[tabble]_[field]
-
- refset.Add(fieldarr[0]);//the first prefix
-
- }
- dataOperate dao = new dataOperate();
- dao.DBServer = "info";
- SqlConnection conn = dao.createCon();
- try
- {
- if (refset.Count > 0)
- {
-
- if (conn.State != ConnectionState.Open)
- conn.Open();//open connection
- deepRef = new Dictionary<string, string>();//clear the relation obj data
- getRef(conn, refset);
-
-
- }
- return deepRef;
- }
- catch (Exception)
- {
-
- throw;
- }
- finally
- {
- if (conn.State == ConnectionState.Open)
- conn.Close();
- }
-
- }
递归函数,最终完成在数据库中获取字段依赖的对象的获取
- /// <summary>
- /// get the relation obj
- /// </summary>
- /// <param name="conn"></param>
- /// <param name="ref_field"></param>
- /// <returns></returns>
- public static HashSet<string> <strong>getRef</strong>(SqlConnection conn, HashSet<string> ref_field)
- {
- HashSet<string> refset = new HashSet<string>();
-
- string refstr = string.Join("','", ref_field);
- if (refstr != "")
- {
- refstr = "'" + refstr + "'";
-
- string sql = "SELECT dbo.GetSplitOfIndex(b.[field],'_',1) as refcode,a.[code] FROM ( select replace(code,'_','') as uncode,* from [SevenWOLDev].[dbo].[sys_tbl_view] ) as a inner join [SevenWOLDev].[dbo].[sys_fld_view] as b on a.uncode=dbo.GetSplitOfIndex(b.[field],'_',1) where replace([table],'_','') in (" + refstr + ") and uitype='ref'";
- //get dataset relation obj
- DataSet ds = dataOperate.getDataset(conn, sql);
- if (ds != null && ds.Tables.Count > 0)
- {
- DataTable dt = ds.Tables[0];
- if (dt.Rows.Count > 0)
- {
- //rel ref exists
- for (int k = 0; k < dt.Rows.Count; k++)
- {
- string vt = dt.Rows[k].ItemArray[0].ToString();
- string vv = dt.Rows[k].ItemArray[1].ToString();
- refset.Add(vt);//save current ref
- if(!<strong>deepRef</strong>.ContainsKey(vt))
- <strong>deepRef</strong>.Add(vt, vv);// save all ref
-
-
- }
- if (refset.Count > 0)// get the ref successfully
- {
- //recursion get
- getRef(conn, refset);
- }
-
- }
-
- }
-
- }
- else
- {
- //no ref
- }
- return refset;
- }
对函数进行调用,并组织出js文件引用路径
- Dictionary<string,string> deepRef = ExtjsFun.getRelRef(HeadfieldSetup);
- if (deepRef != null)
- {
- foreach (var s in deepRef)
- {
- string tem_module = "";
- tem_module = s.Value;
- string[] moduleArr = tem_module.Split('_');
- if (tem_module.IndexOf("_") >= 0)
- tem_module = moduleArr[1];//module name for instance: p_machine ,the module is “machine” unless not included the underscore
- string fieldkind = "dialog";
- jslist.Add(MyComm.getFirstUp(tem_module) + "/" + ExtjsFun.GetJsModuleName(tem_module, s.Value, fieldkind) + ".js");
- fieldkind = "field";
- jslist.Add(MyComm.getFirstUp(tem_module) + "/" + ExtjsFun.GetJsModuleName(tem_module, s.Value, fieldkind) + ".js");
- }
- }
最终结果 如下:
- <script src="../../dept/demoApp/scripts/Sprice/SpriceE_spriceGridfield.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Org/OrgE_orgDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Supplier/SupplierOa_supplierDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Supplier/SupplierOa_supplierField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Unit/UnitE_unitDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Unit/UnitE_unitField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Wh/WhWh_whDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Wh/WhWh_whField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Mold/MoldP_moldDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Mold/MoldP_moldField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Suppliercategory/SuppliercategoryOa_suppliercategoryDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Suppliercategory/SuppliercategoryOa_suppliercategoryField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Bank/BankOa_bankDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Bank/BankOa_bankField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Machine/MachineP_machineDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Machine/MachineP_machineField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Inventory/InventoryE_inventoryDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Basedocment/BasedocmentOa_basedocmentDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Basedocment/BasedocmentOa_basedocmentField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Basedoctype/BasedoctypeOa_basedoctypeDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Basedoctype/BasedoctypeOa_basedoctypeField.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Tax/TaxE_taxDialog.js" type="text/javascript"></script>
- <script src="../../dept/demoApp/scripts/Tax/TaxE_taxField.js" type="text/javascript"></script>
完事代码如下:
- /// <summary>
- /// define the gloable parameter to save the rel obj data
- /// </summary>
- public static Dictionary<string, string> deepRef = new Dictionary<string, string>();
- /// <summary>
- /// 通过表的字段 获取相关的引用字段依赖的对象 直到没有依赖为止
- /// </summary>
- /// <param name="headField">表字段列表</param>
- /// <returns></returns>
- public static Dictionary<string,string> getRelRef(List<IniItemsTableItem> headField)
- {
- HashSet<string> refset = new HashSet<string>();
- // HashSet<string> refset_result = new HashSet<string>();
- foreach (var item in headField)
- {
- if (!item.controlType.StartsWith("hz_"))// is not the field of reference
- {
- continue;
- }
- string[] fieldarr = item.dataIndex.Split('_');//the constructor is :[tabble]_[field]
-
- refset.Add(fieldarr[0]);//the first prefix
-
- }
- dataOperate dao = new dataOperate();
- dao.DBServer = "info";
- SqlConnection conn = dao.createCon();
- try
- {
- if (refset.Count > 0)
- {
-
- if (conn.State != ConnectionState.Open)
- conn.Open();//open connection
- deepRef = new Dictionary<string, string>();//clear the relation obj data
- getRef(conn, refset);
-
-
- }
- return deepRef;
- }
- catch (Exception)
- {
-
- throw;
- }
- finally
- {
- if (conn.State == ConnectionState.Open)
- conn.Close();
- }
-
-
-
-
- }
-
- /// <summary>
- /// get the relation obj
- /// </summary>
- /// <param name="conn"></param>
- /// <param name="ref_field"></param>
- /// <returns></returns>
- public static HashSet<string> getRef(SqlConnection conn, HashSet<string> ref_field)
- {
- HashSet<string> refset = new HashSet<string>();
-
- string refstr = string.Join("','", ref_field);
- if (refstr != "")
- {
- refstr = "'" + refstr + "'";
-
- string sql = "SELECT dbo.GetSplitOfIndex(b.[field],'_',1) as refcode,a.[code] FROM ( select replace(code,'_','') as uncode,* from [SevenWOLDev].[dbo].[sys_tbl_view] ) as a inner join [SevenWOLDev].[dbo].[sys_fld_view] as b on a.uncode=dbo.GetSplitOfIndex(b.[field],'_',1) where replace([table],'_','') in (" + refstr + ") and uitype='ref'";
- //get dataset relation obj
- DataSet ds = dataOperate.getDataset(conn, sql);
- if (ds != null && ds.Tables.Count > 0)
- {
- DataTable dt = ds.Tables[0];
- if (dt.Rows.Count > 0)
- {
- //rel ref exists
- for (int k = 0; k < dt.Rows.Count; k++)
- {
- string vt = dt.Rows[k].ItemArray[0].ToString();
- string vv = dt.Rows[k].ItemArray[1].ToString();
- refset.Add(vt);//save current ref
- if(!deepRef.ContainsKey(vt))
- deepRef.Add(vt, vv);// save all ref
-
-
- }
- if (refset.Count > 0)// get the ref successfully
- {
- //recursion get
- getRef(conn, refset);
- }
-
- }
-
- }
-
-
-
-
- }
- else
- {
- //no ref
- }
- return refset;
- }
以上就是C#递归应用之实现JS文件的自动引用的详细内容,更多关于C#递归实现JS文件引用的资料请关注w3xue其它相关文章!