實現樹樁類型結構及其相應的操作【增刪查改和移動】
一、創建樹樁結構對應的表
1、創建樹樁層次結構表
樹狀結構表採用鏈結構的設計方式，每個節點包含一個當前節點指針ID、下一節點指針ID，以及當前節點的相關信息：節點名稱、順序、有效性、是否為葉子、層次，以下為創建表結構的SQL語句
CREATE TABLE [dbo].[dispatch_type_config](
[type_id] [nvarchar](50) NOT NULL,
[b_type_id] [nvarchar](50) NOT NULL,
[type_name_cn] [nvarchar](200) NOT NULL,
[type_name_tw] [nvarchar](200) NOT NULL,
[type_name_en] [nvarchar](300) NOT NULL,
[sort] [int] NOT NULL,
[is_enable] [bit] NOT NULL,
[belong_client] [bit] NULL,
[is_leaf] [bit] NULL,
[layer] [int] NOT NULL,
CONSTRAINT [PK_dispatch_type_config] PRIMARY KEY CLUSTERED
(
[type_id] ASC,
[b_type_id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[dispatch_type_config] ADD CONSTRAINT [DF_dispatch_type_config_is_enable] DEFAULT ((1)) FOR [is_enable]
GO
ALTER TABLE [dbo].[dispatch_type_config] ADD CONSTRAINT [DF_dispatch_type_config_belong_client] DEFAULT ((0)) FOR [belong_client]
GO
ALTER TABLE [dbo].[dispatch_type_config] ADD CONSTRAINT [DF_dispatch_type_config_is_leaf] DEFAULT ((1)) FOR [is_leaf]
GO
2、創建樹樁葉子節點對應的信息配置表
樹狀葉子節點的信息配置表，是葉子節點才有的信息表，結合具體需求設計自己需要的欄位，以下為創建表結構的SQL語句
CREATE TABLE [dbo].[dispatch_type_leaf](
[dispatch_rowid] [nvarchar](50) NOT NULL,
[ctrl_type] [nvarchar](50) NULL,
[subject] [nvarchar](500) NULL,
[context] [nvarchar](3000) NULL,
[has_case] [bit] NULL,
[is_show] [bit] NULL,
CONSTRAINT [PK_dispatch_type_leaf] PRIMARY KEY CLUSTERED
(
[dispatch_rowid] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[dispatch_type_leaf] ADD CONSTRAINT [DF_dispatch_type_leaf_has_case] DEFAULT ((0)) FOR [has_case]
GO
ALTER TABLE [dbo].[dispatch_type_leaf] ADD CONSTRAINT [DF_dispatch_type_leaf_is_show] DEFAULT ((1)) FOR [is_show]
GO
二、獲取樹樁結構的數據
由於樹狀層次結構表採用了鏈結構的設計方式，因此要想獲得所有樹狀結構節點的數據需要採用循環inner join的方式，又因設限具體的層次數量，故而將循環inner join的SQL以字符串的形式先組合起來，然後再通過exec來獲取數據。
-- [dbo].[dispatch_GetType] 'cn','0'
ALTER proc [dbo].[dispatch_GetType]
(
@language nvarchar(10),
@bSetting nvarchar(10)
)
AS
Begin
declare @sql nvarchar(max)
declare @select nvarchar(max)
declare @from nvarchar(max)
declare @where nvarchar(max)
declare @orderby nvarchar(max)
declare @pid nvarchar(20)
declare @id nvarchar(20)
declare @index int
declare @num int
declare @maxNum int
set @sql=''
select @maxNum=max(layer) from dispatch_type_config where is_leaf='1'
declare _cursor cursor local for
select distinct layer from dispatch_type_config where is_leaf='1'
open _cursor
fetch next from _cursor into @num
while @@FETCH_STATUS=0
begin
set @index=1
set @id=CONVERT(nvarchar,@index)
set @select=' select A'+@id+'.[type_id] as type_id'+@id+' ,A'+@id+'.type_name_'+@language+' as type_name'+@id+' ,A'+@id+'.is_enable as is_enable'+@id+' ,A'+@id+'.sort as sort'+@id
set @from=' from dispatch_type_config A'+@id
if(@sql='') set @orderby=' order by sort'+@id
set @index=@index+1
while @index<=@num
begin
set @pid=@id
set @id=CONVERT(nvarchar,@index)
set @select=@select+' ,A'+@id+'.[type_id] as type_id'+@id+' ,A'+@id+'.type_name_'+@language+' as type_name'+@id+' ,A'+@id+'.is_enable as is_enable'+@id+' ,A'+@id+'.sort as sort'+@id
set @from=@from+' inner join dispatch_type_config A'+@id+' on A'+@pid+'.[b_type_id]=A'+@id+'.[type_id] and A'+@pid+'.layer='+@pid+' and A'+@id+'.layer='+@id
if(@sql='') set @orderby=@orderby+' ,sort'+@id
set @index=@index+1
end
set @pid=@id
while @index<=@maxNum
begin
set @id=CONVERT(nvarchar,@index)
set @select=@select+' ,'''' as type_id'+@id+' ,'''' as type_name'+@id+' ,'''' as is_enable'+@id+' ,'''' as sort'+@id
if(@sql='') set @orderby=@orderby+' ,sort'+@id
set @index=@index+1
end
set @select=@select+' ,A'+@pid+'.[type_id] as dispatch_rowid ,B.has_case ,B.ctrl_type ,A'+@pid+'.b_type_id, A'+@pid+'.belong_client as dispatch_belong '
set @from=@from+' left join dispatch_type_leaf B on A'+@pid+'.[type_id]=B.dispatch_rowid and B.is_show=''1'' '
set @where=' where A'+@pid+'.is_leaf=''1'' '
if(@bSetting='0') set @where=@where+' and A'+@pid+'.is_enable=''1'' '
if(@sql='') set @sql=@select+@from+@where
else set @sql=@sql+' union '+@select+@from+@where
fetch next from _cursor into @num
end
close _cursor
deallocate _cursor
set @sql=@sql+@orderby
exec(@sql)
End
三、將第二步獲取的樹狀結構數據轉換為zTree需要的JSON字符串
1、定義一個樹樁節點對應的json模板
private static string nodeModel = "\"id\":\"{0}\",\"pId\":\"{1}\",\"bId\":\"{2}\",\"name\":\"{3}\",\"is_enable\":\"{4}\",\"isParent\":\"{5}\"{6}";
2、將DataTable轉換為JSON字符串
對於獲取的樹狀層次結構數據是以Row的形式，要想轉換為zTree需要的層次結構(父節點一條記錄，其子節點為N條記錄，每條子節點又有N條記錄……)的形式，故而需要逐層構造zTree需要的數據，首先需要確定根節點，然後依次是各個層次中的第一個節點(第一層中的第一個節點……,第N層中的第一個節點,……最後一層中的所有葉子節點)，然後是各層中的第二個節點，……。因此採用遞歸的方式來處理，具體實現代碼如下：
//對DataRow進行操作
private void getDispatchItem(int n, List nums, List types, DataRow dr, StringBuilder sb)
{
if (n == 0) { return; }
if (types[n - 1] != dr["type_id" + n.ToString()].ToString() || dr["type_id" + n.ToString()].ToString() == "")
{
getDispatchItem(n - 1, nums, types, dr, sb);
types[n - 1] = dr["type_id" + n.ToString()].ToString().Trim();
if (types[n - 1] == "") { return; }
string pId = "", str = ",\"open\":\"true\"";
if (n >= 2) { pId = types[n - 2]; if (n >= 3) { str = ",\"open\":\"false\""; } }
//葉子節點或者沒有節點的父節點
if (n == types.Count || dr["type_id" + (n + 1).ToString()].ToString() == "")
{
sb.AppendFormat(nodeModel, dr["dispatch_rowid"].ToString(), pId, dr["b_type_id"].ToString(), dr["type_name" + n.ToString()].ToString(), dr["is_enable" + n.ToString()].ToString(), false, ",\"open\":\"false\",\"type\":\"" + dr["ctrl_type"].ToString() + "\",\"has_case\":\"" + dr["has_case"].ToString() + "\"");
//sb.AppendFormat(nodeModel, dr["dispatch_rowid"].ToString(), n == 1 ? "0" : types[n - 2], dr["b_type_id"].ToString(), dr["type_name" + n.ToString()].ToString(), false, ",\"open\":\"false\",\"type\":\"" + dr["ctrl_type"].ToString() + "\",\"has_case\":\"" + dr["has_case"].ToString() + "\"");
}
else
{
//if (n == 1) { sb.AppendFormat(nodeModel, types[n - 1], "0", dr["type_id" + (n + 1).ToString()].ToString(), dr["type_name" + n.ToString()].ToString(), true, ",\"open\":\"true\""); }
//else if (n == 2) { sb.AppendFormat(nodeModel, types[n - 1], types[n - 2], dr["type_id" + (n + 1).ToString()].ToString(), dr["type_name" + n.ToString()].ToString(), true, ",\"open\":\"true\""); }
//else { sb.AppendFormat(nodeModel, types[n - 1], types[n - 2], dr["type_id" + (n + 1).ToString()].ToString(), dr["type_name" + n.ToString()].ToString(), true, ",\"open\":\"false\""); }
sb.AppendFormat(nodeModel, types[n - 1], pId, dr["type_id" + (n + 1).ToString()].ToString(), dr["type_name" + n.ToString()].ToString(), dr["is_enable" + n.ToString()].ToString(), true, str);
}
sb.Append("},{");
}
}
//對DataTable進行操作
private string getDispatchTypeTree1(DataTable dt, string search)
{
string result = "";
DataRow[] drc = dt.Select(search);
if (drc.Length > 0)
{
int layer = (dt.Columns.Count - 5) / 4;
List types = new List();
List nums = new List();
for (int n = 0; n < layer; n++) { types.Add(""); nums.Add(0); }
StringBuilder sb = new StringBuilder("{");
foreach (DataRow dr in drc)
{
getDispatchItem(layer, nums, types, dr, sb);
}
result = sb.ToString().TrimEnd('{');
}
return result;
}
四、對樹樁結構進行【增刪查改和移動操作】
實現對葉子節點的相關操作
1、增加葉子節點的操作
--[dbo].[dispatch_GetType_Add] 'cn','525d9a53-bc37-5b9e-371a-8d76054cc2ef','0f39b6ba-0ad0-3fb8-df2d-9d187c69a4cb','049b50ab-bb57-9113-be36-34484409c2fb','新增节点'
ALTER proc [dbo].[dispatch_GetType_Add]
(
@language nvarchar(10),
@pId nvarchar(50),
@type_id nvarchar(50),
@b_type_id nvarchar(50),
@type_name nvarchar(200)
)
AS
Begin Tran
declare @sort int--子節點序號
declare @layer int--子節點樹層
--該節點如果為葉子節點，就改為非葉子(葉子節點滿足：dispatch_type_leaf有數據，並且is_show為true)
if exists (select * from dispatch_type_config where [type_id]=@pId and is_leaf='1')
begin
select @sort=1,@layer=layer+1 from dispatch_type_config where [type_id]=@pId group by layer
update dispatch_type_config set is_leaf='0' where [type_id]=@pId and is_leaf='1'--改為非葉子
if exists (select * from dispatch_type_leaf where dispatch_rowid=@pId )--改為非葉子，將其節點數據先隱藏，當其子節點都刪除后，再還原
begin
update dispatch_type_leaf set is_show='0' where dispatch_rowid=@pId--改為非葉子
end
end
else--非葉子節點才插入樹狀關係
begin
select @sort=count(*)+1,@layer=layer+1 from dispatch_type_config where [type_id]=@pId group by layer
/****插入樹狀關係**********/
insert into dispatch_type_config([type_id],b_type_id,type_name_cn,type_name_tw,type_name_en,sort,layer,is_leaf)
select distinct [type_id],@type_id,type_name_cn,type_name_tw,type_name_en,sort,layer,is_leaf
from dispatch_type_config where [type_id]=@pId
end
/****插入樹狀子節點**********/
declare @type_name_cn nvarchar(200),@type_name_tw nvarchar(200),@type_name_en nvarchar(300)
set @type_name_cn=@type_name+N'**修改**' set @type_name_tw=@type_name+N'**修改**' set @type_name_en=@type_name+N'**Modify**'
if(@language='cn') set @type_name_cn=@type_name
else if(@language='tw')set @type_name_tw=@type_name
else if(@language='en') set @type_name_en=@type_name
--插入樹狀子節點
insert into dispatch_type_config(type_id,b_type_id,type_name_cn,type_name_tw,type_name_en,sort,layer,is_leaf)
values(@type_id,@b_type_id,@type_name_cn,@type_name_tw,@type_name_en,@sort,@layer,'1')
/******插入子節點對應的信息*****/
--insert into dispatch_type_leaf(dispatch_rowid,ctrl_type,[subject],context,has_case,is_show)
--values(@type_id,'common','','','0','1')
If @@Error <> 0
Begin
Rollback
Return @@Error
End
Commit Tran
2、刪除樹樁節點的操作
-- [dbo].[dispatch_GetType_Delete] '0fed864e-1227-f9ac-1df8-c64e84627d0c'
ALTER proc [dbo].[dispatch_GetType_Delete]
(
@type_id nvarchar(50)
)
AS
Begin Tran
declare @is_leaf bit
select top 1 @is_leaf=is_leaf from dispatch_type_config where [type_id]=@type_id
--如果為葉子節點
if(@is_leaf='1')
begin
--如果該發文類型從未被使用過，則刪除
if not exists(select * from dbo.dispatch_info where dispatch_rowid=@type_id)
begin
/****刪除樹狀子節點**********/
delete dispatch_type_config where [type_id]=@type_id
/****刪除子節點**********/
delete dispatch_type_leaf where dispatch_rowid=@type_id
declare @pId nvarchar(50)
select top 1 @pId=[type_id] from dispatch_type_config where b_type_id=@type_id
declare @num int
select @num=count(*) from dispatch_type_config where [type_id]=@pId
if(@num>=2)
begin
/****父節點中仍有子節點，刪除樹狀關係**********/
delete dispatch_type_config where b_type_id=@type_id
end
else
begin
/***父節點中沒有子節點，就將父節點改為葉子節點***/
update dispatch_type_config set is_leaf='1' where [type_id]=@pId--改為葉子節點
if exists (select * from dispatch_type_leaf where dispatch_rowid=@pId )--改為葉子節點，并還原其隱藏的數據
begin
update dispatch_type_leaf set is_show='1' where dispatch_rowid=@pId--改為葉子節點
end
end
end
else--否則將葉子節點隱藏
begin
update dispatch_type_leaf set is_show='0' where dispatch_rowid=@type_id
end
end
else---父節點，則遞歸刪除其子節點
begin
declare @tmp_type_id nvarchar(50)
declare _cursor cursor local for
select b_type_id from dbo.dispatch_type_config where [type_id]=@type_id
open _cursor
fetch next from _cursor into @tmp_type_id
while @@FETCH_STATUS=0
begin
exec [dbo].[dispatch_GetType_Delete] @tmp_type_id
fetch next from _cursor into @tmp_type_id
end
close _cursor
deallocate _cursor
end
If @@Error <> 0
Begin
Rollback
Return @@Error
End
Commit Tran
3、查看樹樁節點的信息
--[dbo].[dispatch_GetType_Item] '05b1077e-9e65-c6b1-0215-e961d3cb42f4'
ALTER proc [dbo].[dispatch_GetType_Item]
(
@type_id nvarchar(50)
)
AS
Begin
--該節點如果為葉子節點
if exists (select * from dispatch_type_config where [type_id]=@type_id and is_leaf='1')
begin
select A.type_name_cn,A.type_name_en,A.type_name_tw,is_enable=isnull(A.is_enable,'1'),B.[subject],B.context,has_case=isnull(B.has_case,'0')
from dispatch_type_config A left join dispatch_type_leaf B on A.[type_id]=B.dispatch_rowid
where A.[type_id]=@type_id
end
else
begin
select type_name_cn,type_name_en,type_name_tw,is_enable
from dispatch_type_config
where [type_id]=@type_id
end
end
4、編輯樹樁節點的操作
ALTER proc [dbo].[dispatch_GetType_Update]
(
@type_id nvarchar(50),
@is_enable bit,
@type_name_cn nvarchar(200),
@type_name_en nvarchar(200),
@type_name_tw nvarchar(200),
@has_case bit,
@subject nvarchar(500),
@content nvarchar(3000)
)
AS
Begin Tran
update dispatch_type_config
set type_name_cn=@type_name_cn,type_name_en=@type_name_en,type_name_tw=@type_name_tw,is_enable=@is_enable
where [type_id]=@type_id
--該節點如果為葉子節點
if exists (select * from dispatch_type_config where [type_id]=@type_id and is_leaf='1')
begin
if exists (select * from dispatch_type_leaf where dispatch_rowid=@type_id)
begin
update dispatch_type_leaf set [subject]=@subject,context=@content,has_case=@has_case
where dispatch_rowid=@type_id
end
else
begin
insert into dispatch_type_leaf(dispatch_rowid,ctrl_type,[subject],context,has_case)
values(@type_id,'common',@subject,@content,@has_case)
end
end
If @@Error <> 0
Begin
Rollback
Return @@Error
End
Commit Tran
5、移動樹樁節點的操作
ALTER proc [dbo].[dispatch_GetType_Move]
(
@type_id nvarchar(50),
@siblings_id nvarchar(50),
@span int
)
AS
Begin
declare @sort int
select @sort=sort from dispatch_type_config where [type_id]=@type_id
update dispatch_type_config set sort=@sort where [type_id]=@siblings_id
update dispatch_type_config set sort=@sort+@span where [type_id]=@type_id
End
