xtraTreeList 使用汇集1

 

 

 

1.绑定数据

 

public void InitDate()
 {
      ds = SqlData.QueryDataSet("select deptid,name,code,rootid from bm_dept");
      treeList1.OptionsBehavior.PopulateServiceColumns = true;
            
      //this.treeList1.PopulateColumns();
      treeList1.ParentFieldName = "rootid";
      treeList1.KeyFieldName = "deptid";
      treeList1.DataSource = ds.Tables[0];
}

  ParentFieldName 设置的字段是从属于KeyFieldName设置的字段的。

  如果A数据ParentFieldName 字段等于B数据的KeyFieldName字段，那A是B的子节点，设置成0 那A是根节点・

所以添加新数据时，要注意KeyFieldName字段的选择，确立从属关系.

 

2.修改时,列修改的功能

private void treeList1_CellValueChanged(object sender, DevExpress.XtraTreeList.CellValueChangedEventArgs e)
 {
            try
            {
                string colKey = e.Column.FieldName;
                string sqlStr = "";  
                switch (colKey)
                {
                    case "deptid":
                        sqlStr = string.Format("update bm_dept set {0}='{1}' where deptid='{2}'", colKey, e.Value, treeList1.FocusedNode.GetValue("deptid").ToString());
                        break;
                    case "name":
                        sqlStr = string.Format("update bm_dept set {0}='{1}' where deptid='{2}'", colKey, e.Value, treeList1.FocusedNode.GetValue("deptid").ToString());
                        break;
                    default:
                        break;
                }

                if (!sqlStr.Trim().Equals(""))
                    SqlData.ExecuteSql(sqlStr);
                InitDate();
            }
            catch (Exception ex)
            {
                XtraMessageBox.Show(ex.Message.ToString());
            }
}

 

3.删除

  

      treeList1.FocusedNode.GetValue("deptid").ToString() 获取行的列值

 

private void sBtnDel_Click(object sender, EventArgs e)
 {

            //if(treeList1.FocusedNode != null)
            //    treeList1.DeleteNode(treeList1.FocusedNode);

            int deid = int.Parse(treeList1.FocusedNode.GetValue("deptid").ToString());
            SqlDataReader dr = SqlData.QueryDataReader("select rootid from bm_dept");
            while (dr.Read())
            {
                int rtid = int.Parse(dr["rootid"].ToString());
                if ( rtid== deid)
                {
                    MessageBox.Show("根节点不能删除！请先删除子节点。", "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    return;
                }
            }

            if (treeList1.FocusedNode != null)
            {
                if (MessageBox.Show("确认删除嘛？", "系统提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Asterisk) == DialogResult.OK)
                {
                    try
                    {
                        int i= SqlData.ExecuteSql("delete from bm_dept where deptid='" + treeList1.FocusedNode.GetValue("deptid").ToString() + "'");
                        if (i > 0)
                        {
                            InitDate();
                        }
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message);
                    }
                }
            }
            else
            {

                MessageBox.Show("请选择行", "系统提示"); 

             }

 }

 

 

4.TreeList 节点拖放

string mubiao tuo ；//全局变量

private void treeList1_DragDrop(object sender, DragEventArgs e)
{

    DevExpress.XtraTreeList.TreeListHitInfo hi = treeList1.CalcHitInfo(treeList1.PointToClient(new Point(e.X, e.Y)));
    mubiao = hi.Node.GetValue("deptid").ToString();

    if (index == 0)
    {
       //MessageBox.Show("放到当前节点的下级");
        string sql = string.Format("update bm_dept set rootid='{0}' where deptid='{1}'", mubiao, tuo);
        SqlData.ExecuteSql(sql);

    }
    else
    {
       //MessageBox.Show("放到当前节点同级");
        SqlDataReader dr = SqlData.QueryDataReader("select rootid from bm_dept where deptid='" + mubiao + "'");
        dr.Read();
        string roots=dr["rootid"].ToString();
        string sql = string.Format("update bm_dept set rootid='{0}' where deptid='{1}'", roots, tuo);
        SqlData.ExecuteSql(sql);
    }
    mubiao = "";
}

private void treeList1_DragEnter(object sender, DragEventArgs e)
{
    tuo = treeList1.FocusedNode.GetValue("deptid").ToString();
}

private void treeList1_CalcNodeDragImageIndex(object sender, DevExpress.XtraTreeList.CalcNodeDragImageIndexEventArgs e)
{
    index = e.ImageIndex;
}