[C#][DevPress]事件委托的使用

先要在代码的最前面声明一下事件、委托

delegate TreeListNode SetTreeNodeHandler(object data, TreeListNode node);
event SetTreeNodeHandler AddTreeNode;

在窗体类的构造函数中绑定事件

public UserCheckItem()
{
    InitializeComponent();
    AddTreeNode  = new SetTreeNodeHandler(TreeEvent);
}

在窗体的Load事件中添加

private void UserCheckItem_Load(object sender, EventArgs e)
{
    Thread th = new Thread(new ThreadStart(LoadTree1));
    th.IsBackground = true;
    th.Start();
}

void LoadTree1()
{
    try
    {
        DataTable dt = bll1.GetCorpCategoryList1();
        if (dt != null && dt.Rows.Count > 0)
        {
            for (int i = 0; i < dt.Rows.Count; i  )
            {
                if (dt.Rows[i]["Corp_Cate_Code"].ToString() == "Z")
                {
                    continue;
                }

                dt.Rows[i]["Corp_Cate_Name"] = Tools.Decrypt(dt.Rows[i]["Corp_Cate_Name"].ToString());
                //TreeListNode treenode = treeList1.AppendNode(new object[] { dt.Rows[i]["Corp_Cate_Name"].ToString() }, null);
                TreeListNode treenode = treeList1.Invoke(AddTreeNode, new object[] { dt.Rows[i]["Corp_Cate_Name"] }, null) as TreeListNode;
                treenode.Tag = dt.Rows[i]["Corp_Cate_Code"].ToString();
                treenode.Expanded = false;
                CreateChildNodes(treenode);
            }
        }
    }
    catch (Exception ex)
    {
        XtraMessageBox.Show("加载列表失败:"   ex.Message, "友情提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
}

private void CreateChildNodes(TreeListNode treenode)
{
    DataTable dt = bll2.GetCheckTableList1(treenode.Tag.ToString(), SysEnum.TableIsPublic.N);
    if (dt != null && dt.Rows.Count > 0)
    {
        for (int i = 0; i < dt.Rows.Count; i  )
        {
            dt.Rows[i]["Check_Tab_Name"] = Tools.Decrypt(dt.Rows[i]["Check_Tab_Name"].ToString());
            //TreeListNode tempNode = treeList1.AppendNode(new object[] { dt.Rows[i]["Check_Tab_Name"].ToString() }, treenode);
            TreeListNode tempNode = treeList1.Invoke(AddTreeNode, new object[] { dt.Rows[i]["Check_Tab_Name"] }, treenode) as TreeListNode;
            tempNode.Tag = dt.Rows[i]["Check_Tab_Code"].ToString();
            CreateChildNodes1(tempNode);
        }
    }
}

private void CreateChildNodes1(TreeListNode treenode)
{
    DataTable dt = bll3.GetCheckItemsList1(treenode.Tag.ToString(), SysEnum.TableIsPublic.A);
    if (dt != null && dt.Rows.Count > 0)
    {
        for (int i = 0; i < dt.Rows.Count; i  )
        {
            dt.Rows[i]["Check_Item_Name"] = Tools.Decrypt(dt.Rows[i]["Check_Item_Name"].ToString());
            //TreeListNode tempNode = treeList1.AppendNode(new object[] { dt.Rows[i]["Check_Item_Name"].ToString() }, treenode);
            TreeListNode tempNode = treeList1.Invoke(AddTreeNode, new object[] { dt.Rows[i]["Check_Item_Name"] }, treenode) as TreeListNode;
            tempNode.Tag =
                dt.Rows[i]["Check_Item_Code"].ToString()   ";"  
                Convert.ToInt32(dt.Rows[i]["Check_Item_IsPublic"])  
                treenode.Tag.ToString();
            //dt.Rows[i]["Check_Item_Code"].ToString();

            CreateChildNodes2(tempNode);
        }
    }
}

private void CreateChildNodes2(TreeListNode treenode)
{
    object[] tt = treenode.Tag.ToString().Split(';');
    DataTable dt = bll4.GetCheckContentList1(tt[0].ToString(), tt[1]);
    if (dt != null && dt.Rows.Count > 0)
    {
        for (int i = 0; i < dt.Rows.Count; i  )
        {
            dt.Rows[i]["Check_Content_Name"] = Tools.Decrypt(dt.Rows[i]["Check_Content_Name"].ToString());
            //TreeListNode tempNode = treeList1.AppendNode(new object[] { dt.Rows[i]["Check_Content_Name"].ToString() }, treenode);
            TreeListNode tempNode = treeList1.Invoke(AddTreeNode, new object[] { dt.Rows[i]["Check_Content_Name"] }, treenode) as TreeListNode;
            tempNode.Tag = dt.Rows[i];
        }
    }
}

private TreeListNode TreeEvent(object data, TreeListNode node)
{
    return this.treeList1.AppendNode(data, node);
}

private void treeList1_FocusedNodeChanged(object sender, DevExpress.XtraTreeList.FocusedNodeChangedEventArgs e)
{
    if (e.Node.Level == 3)
    {
        labelControl3.Text = e.Node.ParentNode.ParentNode.GetValue(0).ToString()   "-->"   e.Node.ParentNode.GetValue(0).ToString();
        DataRow obj = e.Node.Tag as DataRow;
        labelControl4.Text = obj["Check_Content_Name"].ToString();
        memoEdit1.Text = Tools.Decrypt(obj["Check_Content_Require"].ToString());
        memoEdit2.Text = Tools.Decrypt(obj["Check_Content_AccArticle_Content"].ToString());
        memoEdit3.Text = Tools.Decrypt(obj["Check_Content_PunishArticle_Content"].ToString());
    }
}