zoukankan
html css js c++ java
TreeView连接数据
string
connectionString
=
"
Provider=Microsoft.Jet.OLEDB.4.0;User ID=Admin;Data Source='
"
+
HttpContext.Current.Server.MapPath(
"
~/LHB_DataBase/rss.mdb
"
)
+
"
';Jet OLEDB:Engine Type=5;Jet OLEDB:Database Locking Mode=1;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False
"
;
OleDbConnection cn
=
new
OleDbConnection();
OleDbCommand cmd
=
new
OleDbCommand();
private
void
TreeViewOpeartor()
...
{
this
.TreeView1.Nodes.Clear();
string
OledbString
=
"
select * from categories
"
;
DataTable rss_Url
=
this
.GetRss_Url();
cn.ConnectionString
=
connectionString;
cn.Open();
cmd.Connection
=
cn;
cmd.CommandText
=
OledbString;
OleDbDataReader dda
=
cmd.ExecuteReader();
while
(dda.Read())
...
{
TreeNode theNode
=
new
TreeNode ();
theNode.Text
=
dda[
"
categoryname
"
].ToString();
theNode.NodeData
=
dda[
"
ID
"
].ToString();
this
.TreeView1.Nodes.Add(theNode);
DataRow[] urls
=
rss_Url.Select(
"
categoryID=
"
+
dda[
"
ID
"
].ToString());
for
(
int
i
=
0
; i
<
urls.Length ; i
++
)
...
{
Microsoft.Web.UI.WebControls.TreeNode node
=
new
Microsoft.Web.UI.WebControls.TreeNode();
node.Text
=
urls[i][
"
Rss_name
"
].ToString();
node.Target
=
urls[i][
"
Id
"
].ToString();
node.NodeData
=
urls[i][
"
ID
"
].ToString();
theNode.Nodes.Add(node);
}
}
dda.Close();
cn.Close();
}
private
DataTable GetRss_Url()
...
{
cn.ConnectionString
=
connectionString ;
OleDbDataAdapter dda
=
new
OleDbDataAdapter(
"
select * from rss where releasetoweb=1
"
,cn);
DataTable dt
=
new
DataTable();
dda.Fill(dt);
return
dt;
}
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原文地址:https://www.cnblogs.com/xiaotuni/p/2365822.html
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