TreeView
public partial class admin_Admin_ProductFlAdd : System.Web.UI.Page
{
static int id;
OleDbConnection con = new OleDbConnection(DataProvider.ConnectionString);
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
if (Session["admin"] == null)
{
Response.Redirect("Admin_login.aspx");
}
DataSet odr = SqlHelper.ExecuteDataSet("select * from ProductCategories");
this.ViewState["odr"] = odr;
AddTree(0, (TreeNode)null);
}
}
public void AddTree(int ParentID, TreeNode pNode)
{
try
{
DataSet ds = (DataSet)this.ViewState["odr"];
DataView dvTree = new DataView(ds.Tables[0]);
//过滤ParentID,得到当前的所有子节点
dvTree.RowFilter = "[ProFatherTag] = " + ParentID;
foreach (DataRowView Row in dvTree)
{
TreeNode Node = new TreeNode();
if (pNode == null)
{ //添加根节点
Node.Text = Row["CatName"].ToString();
Node.Value = Row["ProCateID"].ToString();
TreeView1.Nodes.Add(Node);
Node.Expanded = true;
AddTree(Int32.Parse(Row["ProCateID"].ToString()), Node); //再次递归
}
else
{ //?添加当前节点的子节点
Node.Text = Row["CatName"].ToString();
Node.Value = Row["ProCateID"].ToString();
pNode.ChildNodes.Add(Node);
Node.Expanded = true;
AddTree(Int32.Parse(Row["ProCateID"].ToString()), Node); //再次递归
}
}
}
catch (Exception e1)
{
MessageBox.Show("" + e1.Message + "", "Admin_ProductFlAdd.aspx");
}
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
if (txtClassName.Text == "")
{
MessageBox.Show("请输入你要添加的分类", "Admin_ProductFlAdd.aspx");
}
else
{
string d = "";
id = int.Parse(this.TreeView1.SelectedNode.Value);
string a = Convert.ToString(SqlHelper.ExecuteScalar(con, "select Flag from ProductCategories where mailto:ProCateID=@ProCateID%22,new OleDbParameter("@ProCateID",id)));
string a1 = "select top 1 flag from ProductCategories where Flag like '" + a + "._' order by Flag desc";
string b = Convert.ToString(SqlHelper.ExecuteScalar(con, a1));
if (b == "")
{
d = a + ".1";
//SqlHelper.ExecuteNonQuery("insert into ProductCategories (ProFatherTag,CatName,Flag)values(" + id + ",'" + this.txtClassName.Text + "','" + d + "')");
SqlHelper.ExecuteNonQuery("insert into ProductCategories (ProFatherTag,CatName,Flag)values(@ProFatherTag,@CatName,@Flag)",new OleDbParameter("@ProFatherTag",id),new OleDbParameter("@CatName",this.txtClassName.Text),new OleDbParameter("@Flag",d));
MessageBox.Show("添加分类成功", "Admin_ProductFlAdd.aspx");
}
else
{
string[] c = b.Split('.');
c[c.Length - 1] = (Convert.ToInt32(c[c.Length - 1]) + 1).ToString();
for (int i = 0; i < c.Length; i++)
{
if (i == c.Length - 1)
{
d += c[i];
break;
}
d += c[i] + ".";
}
OleDbDataReader odr = SqlHelper.ExecuteReader("select Flag from ProductCategories where CatName='" + this.txtClassName.Text + "'");
if (odr.Read())
{
MessageBox.Show("该分类已被添加过", "Admin_ProductFlAdd.aspx");
}
else
{
//SqlHelper.ExecuteNonQuery("insert into ProductCategories (ProFatherTag,CatName,Flag)values(" + id + ",'" + this.txtClassName.Text + "','" + d + "')");
SqlHelper.ExecuteNonQuery("insert into ProductCategories (ProFatherTag,CatName,Flag)values(@ProFatherTag,@CatName,@Flag)", new OleDbParameter("@ProFatherTag", id), new OleDbParameter("@CatName", this.txtClassName.Text), new OleDbParameter("@Flag", d));
MessageBox.Show("添加分类成功", "Admin_ProductFlAdd.aspx");
}
}
}
}
catch (Exception e1)
{
MessageBox.Show("" + e1.Message + "", "Admin_ProductFlAdd.aspx");
}
}
protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
try
{
id = int.Parse(this.TreeView1.SelectedNode.Value);
OleDbDataReader odr = SqlHelper.ExecuteReader("select * from ProductCategories where mailto:ProCateID=@ProCateID%22,new OleDbParameter("@ProCateID",id));
if (odr.Read())
{
this.txtFlClassName.Text = odr["CatName"].ToString();
}
}
catch (Exception e1)
{
MessageBox.Show("" + e1.Message + "", "Admin_ProductFlAdd.aspx");
}
}
}