vsc# net treeview 动态绑定数据库增加修改删除节点.docx
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- 上传时间:2023-05-08
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vsc# net treeview 动态绑定数据库增加修改删除节点.docx
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vsc#nettreeview动态绑定数据库增加修改删除节点
vs2008c#.nettreeview动态绑定数据库,增加、修改、删除节点 假设在数据库中建立一张表,如tb_treeview,如下创建
createtabletb_treeview(
id intnotnull,
displayNamevarchar(20),
parentIdint,
urlvarchar(100)
);
向表中插入几个数据如:
insertintotb_treeview(1,'中国',0,'');
insertintotb_treeview(2,'安徽省',1,'');
insertintotb_treeview(3,'合肥市',2,'');
insertintotb_treeview(4,'江苏省',1,'');
insertintotb_treeview(5,'南京市',4,'');
insertintotb_treeview(6,'湖北省',1,'');
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<>'0'";
//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"].ToString();
tn1.NavigateUrl=drv["url"].ToString();//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["id"].ToString()),tn1);
}
else
{
System.Web.UI.WebControls.TreeNodetn2=newSystem.Web.UI.WebControls.TreeNode();
tn2.Text=drv["displayName"].ToString();
tn2.Value=drv["id"].ToString();
tn2.NavigateUrl=drv["url"].ToString();
pNode.ChildNodes.Add(tn2);
tn2.ShowCheckBox=true;
tn2.Expanded=false;
//递归调用
AddTreeNode(Int32.Parse(drv["id"].ToString()),tn2);
}
}
}
protectedvoidTreeView_SelectedIndexChanged()
{
Label4.Text="";
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;
stringconString="DataSource=.;uid=sa;pwd=sa;Database=Arm";
SqlConnectioncon1=newSqlConnection(conString);
con1.Open();
stringstrSQL="select*fromtb_treeviewwhereparentId='"+TreeView1.SelectedNode.Value+"'";
SqlDataAdapterda=newSqlDataAdapter(strSQL,con1);
da.Fill(dt);
AddTreeNode(Int32.Parse(TreeView1.SelectedNode.Value),TreeView1.SelectedNode);
con1.Close();
}
}
}
}
protectedvoidBtnUpdate_Click(objectsender,EventArgse)
{
stringconString="Provider=SQLOLEDB;DataSource=.;uid=sa;pwd=sa;Database=Arm";
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;
Label4.Text="";
}
protectedvoidButton4_Click(objectsender,EventArgse)
{
stringconString="Provider=SQLOLEDB;DataSource=.;uid=sa;pwd=sa;Database=Arm";
stringdelete="deletefromtb_treeviewwhereid='"+this.TextBox2.Text+"'";
stringnodeid=this.TextBox2.Text;
stringnodename=this.TextBox1.Text;
if(TreeView1.SelectedNode.ChildNodes.Count>0)
{
Label4.Text=TreeView1.SelectedNode.Text+":
还有子节点未删除!
";
}
else
{
OleDbConnectioncnn=newOleDbConnection(conString);
OleDbCommandcom=newOleDbCommand(delete,cnn);
cnn.Open();
com.ExecuteNonQuery();
cnn.Close();
if(TreeView1.SelectedNode.Parent==null)
{
TreeView1.Nodes.Remove(TreeView1.SelectedNode);
}
else
{
TreeView1.SelectedNode.Parent.ChildNodes.Remove(TreeView1.SelectedNode);
}
}
}
protectedvoidBtnAdd_Click(objectsender,EventArgse)
{
stringparentid;
if(TreeView1.SelectedNode.Parent==null)
{
parentid="0";
stringconString="Provider=SQLOLEDB;DataSource=.;uid=sa;pwd=sa;Database=Arm";
stringinsert="inserttb_treeview(displayname,parentid)values('"+TextBox1.Text+"','"+parentid+"')";
stringnodeid=this.TextBox2.Text;
stringnodename=this.TextBox1.Text;
OleDbConnectioncnn=newOleDbConnection(conString);
OleDbCommandcom=newOleDbCommand(insert,cnn);
cnn.Open();
com.ExecuteNonQuery();
cnn.Close();
System.Web.UI.WebControls.TreeNodetn3=newSystem.Web.UI.WebControls.TreeNode();
tn3.Text=nodename;//节点上要显示的名称
SqlConnectionconselect=newSqlConnection("DataSource=.;uid=sa;pwd=sa;Database=Arm");
SqlDataAdaptersda=newSqlDataAdapter("selectmax(id)asidfromtb_treeview",conselect);
conselect.Open();
DataSetds=newDataSet();
sda.Fill(ds);
stringval=ds.Tables[0].Rows[0]["id"].ToString();
conselect.Close();
tn3.Value=val;
//tn3.NavigateUrl=drv["url"].ToString();//点击节点名称,跳转到指定url页面
TreeView1.Nodes.Add(tn3);//将根节点加入到TreeView中去
tn3.Expanded=false;
//tn1.SelectAction=TreeNodeSelectAction.Expand;
tn3.ShowCheckBox=true;
}
else
{
parentid=TreeView1.SelectedNode.Parent.Value;
stringconString="Provider=SQLOLEDB;DataSource=.;uid=sa;pwd=sa;Database=Arm";
stringinsert="inserttb_treeview(displayname,parentid)values('"+TextBox1.Text+"','"+parentid+"')";
stringnodeid=this.TextBox2.Text;
stringnodename=this.TextBox1.Text;
OleDbConnectioncnn=newOleDbConnection(conString);
OleDbCommandcom=newOleDbCommand(insert,cnn);
cnn.Open();
com.ExecuteNonQuery();
cnn.Close();
System.Web.UI.WebControls.TreeNodetn3=newSystem.Web.UI.WebControls.TreeNode();
tn3.Text=nodename;//节点上要显示的名称
SqlConnectionconselect=newSqlConnection("DataSource=.;uid=sa;pwd=sa;Database=Arm");
SqlDataAdaptersda=newSqlDataAdapter("selectmax(id)asidfromtb_treeview",conselect);
conselect.Open();
DataSetds=newDataSet();
sda.Fill(ds);
stringval=ds.Tables[0].Rows[0]["id"].ToString();
conselect.Close();
tn3.Value=val;
//tn3.NavigateUrl=drv["url"].ToString();//点击节点名称,跳转到指定url页面
//TreeView1.Nodes.Add(tn3);//将根节点加入到TreeView中去
TreeView1.SelectedNode.Parent.ChildNodes.Add(tn3);
tn3.Expanded=false;
//tn1.SelectAction=TreeNodeSelectAction.Expand;
tn3.ShowCheckBox=true;
}
Label4.Text="";
}
protectedvoidBtnAddChild_Click(objectsender,EventArgse)
{
stringparentid;
if(TreeView1.SelectedNode.Parent==null)
{
parentid="0";
}
else
{
parentid=TreeView1.SelectedNode.Parent.Value;
}
stringconString="Provider=SQLOLEDB;DataSource=.;uid=sa;pwd=sa;Database=Arm";
stringinsert="inserttb_treeview(displayname,parentid)values('"+TextBox1.Text+"','"+TreeView1.SelectedNode.Value+"')";
stringnodeid=this.TextBox2.Text;
stringnodename=this.TextBox1.Text;
OleDbConnectioncnn=newOleDbConnection(conString);
OleDbCommandcom=newOleDbCommand(insert,cnn);
cnn.Open();
com.ExecuteNonQuery();
cnn.Close();
System.Web.UI.WebControls.TreeNodetn3=newSystem.Web.UI.WebControls.TreeNode();
tn3.Text=nodename;//节点上要显示的名称
SqlConnectionconselect=newSqlConnection("DataSource=.;uid=sa;pwd=sa;Database=Arm");
SqlDataAdaptersda=newSqlDataAdapter("selectmax(id)asidfromtb_treeview",conselect);
conselect.Open();
DataSetds=newDataSet();
sda.Fill(ds);
stringval=ds.Tables[0].Rows[0]["id"].ToString();
conselect.Close();
tn3.Value=val;
//tn3.NavigateUrl=drv["url"].ToString();//点击节点名称,跳转到指定url页面
//TreeView1.Nodes.Add(tn3);//将根节点加入到TreeView中去
TreeView1.SelectedNode.ChildNodes.Add(tn3);
tn3.Expanded=false;
//tn1.SelectAction=TreeNodeSelectAction.Expand;
tn3.ShowCheckBox=true;
Label4.Text="";
}
}
}
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- 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