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
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/// <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)
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/// <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
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/// <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
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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:
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< 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:
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/// <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服务器之家其它相关文章!
原文链接:https://www.cnblogs.com/hztech/p/17202728.html