用DataTable 递归生成目录树

女爷i 2022-01-06 13:57 284阅读 0赞

static DataColumn column = new DataColumn();  
static DataTable table = new DataTable();  
  
static DataRow MyRow;  
ublic static DataTable GetCategoryTree(WebInfoBase info)  
\{  
DataTable dt = info.List(\_DefaultDB, "", "\[ID\],\[Title\],\[ParentID\],\[ChildNum\],\[Depth\],\[OrderNo\]", "&version=", "\[ID\] ASC");  
  
if (table.Rows.Count > 0)  
\{  
table.Columns.Clear();  
table.Rows.Clear();  
\}  
CreateDataTable();  
GetTree(dt, "0", 0);  
return table;  
\}  
public static void GetTree(DataTable dt, string pid, int blank)  
\{  
string str = " ";  
DataView dv = new DataView(dt);  
dv.RowFilter = "ParentID = " + pid;  
if (blank > 0)  
\{  
string s = "";  
if (blank == 1)  
\{  
str = "├";  
\}  
for (int i = 2; i <= blank; i++)  
\{  
s = s + " | "+" "+" - ";  
\}  
str = s + "├";  
\}  
  
foreach (DataRowView drv in dv)  
\{  
string id = drv\["ID"\].ToString();  
string Title = drv\["Title"\].ToString();  
string OrderNo = drv\["OrderNo"\].ToString();  
string ParentID = drv\["ParentID"\].ToString();  
string Depth = drv\["Depth"\].ToString();  
string ChildNum = drv\["ChildNum"\].ToString();  
  
MyRow = table.NewRow();  
MyRow\["ID"\] = int.Parse(id);  
MyRow\["Title"\] = str + Title;  
MyRow\["OrderNo"\] = int.Parse(OrderNo);  
MyRow\["ParentID"\] = int.Parse(ParentID);  
MyRow\["Depth"\] = int.Parse(Depth);  
MyRow\["ChildNum"\] = int.Parse(ChildNum);  
table.Rows.Add(MyRow);  
  
int n = int.Parse(Depth);  
//if (n <= 1)  
//\{  
n++;  
//\}  
GetTree(dt, id, n);  
\}  
\}  
public static void CreateDataTable()  
\{  
table.Columns.Clear();  
column = new DataColumn();  
column.DataType = System.Type.GetType("System.Int32");  
column.ColumnName = "ID";  
table.Columns.Add(column);  
  
column = new DataColumn();  
column.DataType = System.Type.GetType("System.Int32");  
column.ColumnName = "ParentID";  
table.Columns.Add(column);  
  
column = new DataColumn();  
column.DataType = Type.GetType("System.String");  
column.ColumnName = "Title";  
table.Columns.Add(column);  
  
column = new DataColumn();  
column.DataType = Type.GetType("System.Int32");  
column.ColumnName = "ChildNum";  
table.Columns.Add(column);  
  
column = new DataColumn();  
column.DataType = Type.GetType("System.Int32");  
column.ColumnName = "Depth";  
table.Columns.Add(column);  
  
column = new DataColumn();  
column.DataType = Type.GetType("System.Int32");  
column.ColumnName = "OrderNo";  
table.Columns.Add(column);  
//table.Columns.Clear();  
  
\}

转载于:https://www.cnblogs.com/stulife/archive/2011/03/03/1969760.html