vsc# net treeview 动态绑定数据库增加修改删除节点文档格式.docx
- 文档编号:7593694
- 上传时间:2023-05-08
- 格式:DOCX
- 页数:14
- 大小:23.55KB
vsc# net treeview 动态绑定数据库增加修改删除节点文档格式.docx
《vsc# net treeview 动态绑定数据库增加修改删除节点文档格式.docx》由会员分享,可在线阅读,更多相关《vsc# net treeview 动态绑定数据库增加修改删除节点文档格式.docx(14页珍藏版)》请在冰点文库上搜索。
,1,'
insertintotb_treeview(3,'
合肥市'
2,'
insertintotb_treeview(4,'
江苏省'
insertintotb_treeview(5,'
南京市'
4,'
insertintotb_treeview(6,'
湖北省'
作为演示数据。
(1)、打开VS2008,新建一个网站项目,在Default.aspx中添加控件如下
(2)、在Default.aspx.cs文件里添加如下代码:
usingSystem;
usingSystem.Collections;
usingSystem.Configuration;
usingSystem.Data;
usingSystem.Linq;
usingSystem.Web;
usingSystem.Web.Security;
usingSystem.Web.UI;
usingSystem.Web.UI.HtmlControls;
usingSystem.Web.UI.WebControls;
usingSystem.Web.UI.WebControls.WebParts;
usingSystem.Xml.Linq;
usingSystem.Data.SqlClient;
usingSystem.Windows.Forms;
usingSystem.Drawing;
usingSystem.Data.OleDb;
namespaceWebApplication
{
publicpartialclassWebForm3:
System.Web.UI.Page
{
DataTabledt=newDataTable();
protectedvoidPage_Load(objectsender,EventArgse)
stringconString="
DataSource=.;
uid=sa;
pwd=sa;
Database=Arm"
;
SqlConnectioncon=newSqlConnection(conString);
try
Label4.Text="
"
if(!
IsPostBack)//页面首次加载
con.Open();
stringstrSQL="
select*fromtb_treeviewwhereparentId='
0'
SqlDataAdapterda=newSqlDataAdapter(strSQL,con);
da.Fill(dt);
AddTreeNode(0,(System.Web.UI.WebControls.TreeNode)null);
}
else
//con.Open();
//stringstrSQL="
select*fromtb_treeviewwhereparentId<
>
//SqlDataAdapterda=newSqlDataAdapter(strSQL,con);
//da.Fill(dt);
TreeView_SelectedIndexChanged();
//catch(Exceptione)
//{
//}
finally
con.Close();
protectedvoidAddTreeNode(intparentId,System.Web.UI.WebControls.TreeNodepNode)
DataViewdv=newDataView(dt);
//过滤parentId,得到当前节点的所有子节点
dv.RowFilter="
parentId="
+parentId;
foreach(DataRowViewdrvindv)
if(parentId==0)
System.Web.UI.WebControls.TreeNodetn1=newSystem.Web.UI.WebControls.TreeNode();
tn1.Text=drv["
displayName"
].ToString();
//节点上要显示的名称
tn1.Value=drv["
id"
tn1.NavigateUrl=drv["
url"
//点击节点名称,跳转到指定url页面
TreeView1.Nodes.Add(tn1);
//将根节点加入到TreeView中去
tn1.Expanded=false;
//tn1.SelectAction=TreeNodeSelectAction.Expand;
tn1.ShowCheckBox=true;
//递归调用
AddTreeNode(Int32.Parse(drv["
].ToString()),tn1);
System.Web.UI.WebControls.TreeNodetn2=newSystem.Web.UI.WebControls.TreeNode();
tn2.Text=drv["
tn2.Value=drv["
tn2.NavigateUrl=drv["
pNode.ChildNodes.Add(tn2);
tn2.ShowCheckBox=true;
tn2.Expanded=false;
].ToString()),tn2);
protectedvoidTreeView_SelectedIndexChanged()
if(TreeView1.SelectedNode!
=null)
if(TextBox2.Text!
=TreeView1.SelectedNode.Value)
TextBox1.Text=TreeView1.SelectedNode.Text;
TextBox2.Text=TreeView1.SelectedNode.Value.ToString();
if(TreeView1.SelectedNode.ChildNodes.Count==0)
System.Web.UI.WebControls.TreeNodetn=TreeView1.SelectedNode;
SqlConnectioncon1=newSqlConnection(conString);
con1.Open();
+TreeView1.SelectedNode.Value+"
SqlDataAdapterda=newSqlDataAdapter(strSQL,con1);
AddTreeNode(Int32.Parse(TreeView1.SelectedNode.Value),TreeView1.SelectedNode);
con1.Close();
protectedvoidBtnUpdate_Click(objectsender,EventArgse)
Provider=SQLOLEDB;
stringupdatas="
updatetb_treeviewsetdisplayName='
+this.TextBox1.Text+"
whereId='
+this.TextBox2.Text+"
stringnodeid=this.TextBox2.Text;
stringnodename=this.TextBox1.Text;
OleDbConnectioncnn=newOleDbConnection(conString);
OleDbCommandcom=newOleDbCommand(updatas,cnn);
cnn.Open();
com.ExecuteNonQuery();
cnn.Close();
TreeView1.SelectedNode.Text=nodename;
protectedvoidButton4_Click(objectsender,EventArgse)
stringdelete="
deletefromtb_treeviewwhereid='
if(TreeView1.SelectedNode.ChildNodes.Count>
0)
Label4.Text=TreeView1.SelectedNode.Text+"
:
还有子节点未删除!
OleDbCommandcom=newOleDbCommand(delete,cnn);
if(TreeView1.SelectedNode.Parent==null)
TreeView1.Nodes.Remove(TreeView1.SelectedNode);
TreeView1.SelectedNode.Parent.ChildNodes.Remove(TreeView1.SelectedNode);
protectedvoidBtnAdd_Click(objectsender,EventArgse)
stringparentid;
if(TreeView1.SelectedNode.Parent==null)
parentid="
0"
stringinsert="
inserttb_treeview(displayname,parentid)values('
+TextBox1.Text+"
'
+parentid+"
)"
OleDbCommandcom=newOleDbCommand(insert,cnn);
System.Web.UI.WebControls.TreeNodetn3=newSystem.Web.UI.WebControls.TreeNode();
tn3.Text=nodename;
SqlConnectionconselect=newSqlConnection("
SqlDataAdaptersda=newSqlDataAdapter("
selectmax(id)asidfromtb_treeview"
conselect);
conselect.Open();
DataSetds=newDataSet();
sda.Fill(ds);
stringval=ds.Tables[0].Rows[0]["
conselect.Close();
tn3.Value=val;
//tn3.NavigateUrl=drv["
TreeView1.Nodes.Add(tn3);
tn3.Expanded=false;
tn3.ShowCheckBox=true;
parentid=TreeView1.SelectedNode.Parent.Value;
//TreeView1.Nodes.Add(tn3);
TreeView1.SelectedNode.Parent.ChildNodes.Add(tn3);
protectedvoidBtnAddChild_Click(objectsender,EventArgse)
if(TreeView1.SelectedNode.Parent==null)
TreeView1.SelectedNode.ChildNodes.Add(tn3);
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- vsc# net treeview 动态绑定数据库增加修改删除节点 vsc 动态 绑定 数据库 增加 修改 删除 节点