C#遞歸應用之實現JS文件的自動引用
背景
兩張表，分別是 ：sys_tbl,和 sys_field,其中：sys_tbl 是系統所有表的信息，包含兩個字段 ：code（表名）,name（表描述信息）；sys_fld 是記錄第張表中的字段 的名稱（field)和描述信息（table) ,
截圖如下：
sys_tbl
其中，字段 名稱包含對其它名稱（對象） 的引用，寫法為：表名（去除下劃線）_引用字段 ，如：einventory_cinvcode,就是對表 e_inventory 中字段 cinvcode的引用。
每張表都在系統 中對應有不同功能的js文件（模塊）如： 編輯窗體（dialog類型)，跨域選擇窗體(field）類型等
需求
在一個綜合的頁面中，會對其它對象進行引用（依賴)，而這種引用最終體現在對js文件的包含。同時被引用的js 文件（一級引用）還有自已關聯對象（二級引用）…..如此下去，直到N 級引用。
所以現在需要逐層找到對象的引用，直到最後不依賴任何對象為止，並把這些js文件生成引用包含路徑（不重復）
分析
1、返回結果類型
得到這些js引用，不能重復，但是對象之間引用是可以存在交叉的，在整個引用鏈條上，同一個對象會被 多個對象引用，所以簡單的字符串數組是避免不瞭重復的。但是在C#中的HashSet可以做到不重復，同時這個去重工作是自動完成的，所以存結果如果是簡單的value類型，用 HashSet就可以，但是因為字段中表的信息已經被格式化過，所以還要把格式化之前的表名稱取出與字段對應，所以需要一個key-value類型的數據 ，那就是 Dictionary<string, string> 瞭。
2、算法選擇
因為查找引用，是層層進行的，而且下一層引用的要用到上一層的引用結果，所以這裡選擇遞歸算法
代碼實現
聲明一個全局變量，記錄所有的表與字段的對應的數據，因為需要確保數據key 唯一性所以選擇Dicctionary類型
/// <summary>
/// define the gloable parameter to save the rel obj data
/// </summary>
public static Dictionary<string, string> <strong>deepRef </strong>= new Dictionary<string, string>();
入口函數，完成準備工作，（數據庫連接，參數準備）
/// <summary>
/// 通過表的字段 獲取相關的引用字段依賴的對象 直到沒有依賴為止
/// </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();
}
}
遞歸函數，最終完成在數據庫中獲取字段依賴的對象的獲取
/// <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;
}
對函數進行調用，並組織出js文件引用路徑
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");
}
}
最終結果 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>
完事代碼如下：
/// <summary>
/// define the gloable parameter to save the rel obj data
/// </summary>
public static Dictionary<string, string> deepRef = new Dictionary<string, string>();
/// <summary>
/// 通過表的字段 獲取相關的引用字段依賴的對象 直到沒有依賴為止
/// </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#遞歸應用之實現JS文件的自動引用的詳細內容，更多關於C#遞歸實現JS文件引用的資料請關註WalkonNet其它相關文章！