这里主要的任务是一个TreeView，通过TreeView可以动态添加数据，这里是添加一个公司部门，比如董事局、研发、财务等。数据库名为department,一张表表名为dept.四个字段，分别是deptID(编号，通过函数自动生成),deptName（部门名称）,deptLevel（部门等级）,parentNo（父结点编号）。
源代码如下：
private static DataSet ds;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
this.LblMessage.Text="";
this.BtnDelete.Attributes.Add("onclick","return delConfirm()");
if(!this.IsPostBack)
{
this.initButtons();
this.initTree();
}
}
//初始化各个按钮的状态
private void initButtons()
{
this.BtnAdd.Visible=true;
this.BtnDelete.Visible=true;
this.BtnEdit.Visible=true;
this.BtnSave.Visible=false;
this.BtnReturn.Visible=false;
}
//返回从部门表中的所有数据
private DataSet ReturnDS()
{
SqlConnection con=DBCon.createcon();
con.Open();
string sql="select * from dept";
SqlDataAdapter sda=new SqlDataAdapter(sql,con);
DataSet ds1=new DataSet();
sda.Fill(ds1);
con.Close();
return ds1;
}
//动态初始化TreeView
private void initTree()
{
TreeNode ParentNode=new TreeNode();
ParentNode.ID="100000000";
ParentNode.Text="栏目树";
this.TvDepartMent.Nodes.Add(ParentNode);
CreateChildNode(ParentNode,"100000000");
}
//初始化TextBox,DropDownList
private void initText()
{
this.TbDepName.Text="";
this.TbDepName.Enabled=true;
this.DdlLevel.Enabled=true;
}
//动态生成各个树结点的子结点
private void CreateChildNode(TreeNode node,string ParentNo)
{
ds=this.ReturnDS();
DataRow[] rows=ds.Tables[0].Select("parentNo='"+ParentNo+"'");
foreach(DataRow dr in rows)
{
TreeNode ChildNode=new TreeNode();
ChildNode.ID=dr["deptID"].ToString();
ChildNode.Text=dr["deptName"].ToString();
node.Nodes.Add(ChildNode);
this.CreateChildNode(ChildNode,dr["deptID"].ToString());
}
}
//按添加按钮后各个按钮的状态
private void addButtonsStatus()
{
this.BtnSave.Visible=true;
this.BtnReturn.Visible=true;
this.BtnAdd.Visible=false;
this.BtnDelete.Visible=false;
this.BtnEdit.Visible=false;
}
//添加结点
private void BtnAdd_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
this.addButtonsStatus();
ViewState["type"]="add";
this.initText();
}
//保存
private void BtnSave_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
SqlConnection con=DBCon.createcon();
con.Open();
if(ViewState["type"].ToString()=="add")
{
if(this.TbDepName.Text.Trim()=="")
{
this.LblMessage.Text="<script language=javascript>alert('部门名称不能为空！');</script>";
return;
}
string deptName=this.TbDepName.Text.Trim();
string deptLevel=this.DdlLevel.SelectedValue.ToString();
string deptNo=AutoNo.getAutoNo("dept","deptID");
string parentNO=this.TvDepartMent.GetNodeFromIndex(this.TvDepartMent.SelectedNodeIndex).ID.ToString();
string sql="insert into dept(deptID,deptName,deptLevel,parentNo) values('"+deptNo+"','"+deptName+"','"+deptLevel+"','"+parentNO+"')";
SqlCommand cmd=new SqlCommand(sql,con);
cmd.ExecuteNonQuery();
con.Close();
this.TvDepartMent.Nodes.Clear();
this.initTree();
this.LblMessage.Text="<script language=javascript>alert('恭喜新增成功！');</script>";
}
if(ViewState["type"].ToString()=="edit")
{
if(this.TbDepName.Text=="")
{
this.LblMessage.Text="<script language=javascript>alert('您还有选择任何一项！');</script>";
return;
}
string deptName=this.TbDepName.Text.Trim();
string deptLevel=this.DdlLevel.SelectedValue.ToString();
string deptID=this.TvDepartMent.GetNodeFromIndex(this.TvDepartMent.SelectedNodeIndex).ID.ToString();
string sql="update dept set deptName='"+deptName+"',deptLevel='"+deptLevel+"'where deptID='"+deptID+"'";
SqlCommand cmd=new SqlCommand(sql,con);
int k=cmd.ExecuteNonQuery();
if(k!=0)
{
this.TvDepartMent.Nodes.Clear();
this.initTree();
this.LblMessage.Text="<script language=javascript>alert('恭喜您，修改成功！');</script>";
}
else
{
this.LblMessage.Text="<script language=javascript>alert('抱歉，出错了，请您重新试一下。');</script>";
}
}
}
//返回
private void BtnReturn_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
initButtons();
this.initText();
}
//编辑结点
private void BtnEdit_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
ViewState["type"]="edit";
this.EditTbStatus();
this.addButtonsStatus();
}
//选择一个结点后TextBox,DropDownList的状态的改变
private void SelectTbStatus()
{
this.TbDepName.Enabled=false;
this.DdlLevel.Enabled=false;
}
//编辑状态下TextBox,DropDownList的状态的改变
private void EditTbStatus()
{
this.TbDepName.Enabled=true;
this.DdlLevel.Enabled=true;
}
//选择一个结点后发生的事件
private void TvDepartMent_SelectedIndexChange(object sender, Microsoft.Web.UI.WebControls.TreeViewSelectEventArgs e)
{
this.initButtons();
string deptNo=this.TvDepartMent.GetNodeFromIndex(this.TvDepartMent.SelectedNodeIndex).ID.ToString();
if(deptNo!="100000000")
{
SqlConnection con=DBCon.createcon();
con.Open();
string sql="select * from dept where deptID='"+deptNo+"'";
DataSet ds=new DataSet();
SqlDataAdapter sda=new SqlDataAdapter(sql,con);
sda.Fill(ds);
this.TbDepName.Text=ds.Tables[0].Rows[0]["deptName"].ToString();
this.DdlLevel.SelectedValue=ds.Tables[0].Rows[0]["deptLevel"].ToString();
con.Close();
}
this.SelectTbStatus();
}
//删除某个结点
private void BtnDelete_Click(object sender, System.Web.UI.ImageClickEventArgs e)
{
string deptNo=this.TvDepartMent.GetNodeFromIndex(this.TvDepartMent.SelectedNodeIndex).ID.ToString();
if(deptNo=="100000000")
{
this.LblMessage.Text="<script language=javascript>alert('此根结点不能删除。');</script>";
return;
}
SqlConnection con=DBCon.createcon();
con.Open();
string sql="delete from dept where deptID='"+deptNo+"'";
SqlCommand cmd=new SqlCommand(sql,con);
int k=cmd.ExecuteNonQuery();
if(k!=0)
{
this.LblMessage.Text="<script language=javascript>alert('删除成功！');</script>";
this.TvDepartMent.Nodes.Clear();
this.initTree();
/p>
}
con.Close();
}
}
}