[DevExpress]TreeListLookUpEdit带checkbox之经典运用

public partial class TreeListLookUpEdit : DevExpress.XtraEditors.XtraForm
{

private string _KeyName;
public string KeyName
{
get { return lblKeyName.Text; }
set { lblKeyName.Text = value; }
}
private string _KeyID;

public string KeyID
{
get { return lblKeyID.Text; }
set { lblKeyID.Text= value; }
}
public TreeListLookUpEdit()
{
InitializeComponent();
}
private void TreeListLookUpEdit_Load(object sender, EventArgs e)
{
}

protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);

if (DesignMode) return;
txtRole.Properties.TreeList.OptionsView.ShowCheckBoxes = true;
txtRoleBind();
DefaultChecked("3");
GetSelectedRoleIDandName();

txtRole.Properties.TreeList.AfterCheckNode += (s, a) =>
{
a.Node.Selected = true;
// txtRole.RefreshEditValue();
// txtRole.ForceClosePopup();
GetSelectedRoleIDandName();
};

}
private void GetSelectedRoleIDandName()
{
this.lstCheckedKeyID.Clear();
this.lstCheckedKeyName.Clear();

if (txtRole.Properties.TreeList.Nodes.Count > 0)
{
foreach (TreeListNode root in txtRole.Properties.TreeList.Nodes)
{
GetCheckedKeyID(root);
}
}
lblKeyID.Text = "";
lblKeyName.Text = "";
foreach (int id in lstCheckedKeyID)
{
KeyID += id + ",";
}

foreach (string name in lstCheckedKeyName)
{
KeyName += name + ",";
}
}
private void DefaultChecked(string rid)
{
string strSql = " SELECT [MID] FROM [DZ].[dbo].[DZ_RoleMenu]   where RID=" + rid;
DataTable dt = DbHelperSQL.Query(strSql).Tables[0];

if (txtRole.Properties.TreeList.Nodes.Count > 0)
{
foreach (TreeListNode nd in txtRole.Properties.TreeList.Nodes)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
int checkedkeyid = int.Parse(dt.Rows[i][0].ToString());
if (txtRole.Properties.TreeList.FindNodeByKeyID(checkedkeyid) != null)
{
txtRole.Properties.TreeList.FindNodeByKeyID(checkedkeyid).Checked = true;
}
}
}
}

}
private void txtRoleBind()
{
DZAMS.BLL.DZ_RoleInfo rf = new BLL.DZ_RoleInfo();
string where = "1=1  order by PARENTID,ID ASC";
DataTable tblDatas = rf.GetList(where).Tables[0];

//设置字段
this.txtRole.Properties.TreeList.KeyFieldName = "ID";
this.txtRole.Properties.TreeList.ParentFieldName = "PARENTID";
this.txtRole.Properties.DataSource = tblDatas;

this.txtRole.Properties.ValueMember = "ID";
this.txtRole.Properties.DisplayMember = "NAME";
}
private List<int> lstCheckedKeyID = new List<int>();//选择局ID集合
private List<string> lstCheckedKeyName = new List<string>();//选择局Name集合
/// <summary>
/// 获取选择状态的数据主键ID集合
/// </summary>
/// <param name="parentNode">父级节点</param>
private void GetCheckedKeyID(TreeListNode parentNode)
{
if (parentNode.Nodes.Count == 0)
{
return;//递归终止
}
if (parentNode.CheckState != CheckState.Unchecked)
{
DataRowView drv = txtRole.Properties.TreeList.GetDataRecordByNode(parentNode) as DataRowView;
if (drv != null)
{
int KeyFieldName = (int)drv["ID"];
string DisplayMember = drv["NAME"].ToString();
if (!lstCheckedKeyID.Contains(KeyFieldName))
{
lstCheckedKeyID.Add(KeyFieldName);
}
if (!lstCheckedKeyName.Contains(DisplayMember))
{
lstCheckedKeyName.Add(DisplayMember);
}
}
}
foreach (TreeListNode node in parentNode.Nodes)
{
if (node.CheckState != CheckState.Unchecked)
{
DataRowView drv = txtRole.Properties.TreeList.GetDataRecordByNode(node) as DataRowView;//关键代码，就是不知道是这样获取数据而纠结了非常久(鬼知道能够转换为DataRowView啊)
if (drv != null)
{
int KeyFieldName = (int)drv["ID"];
string DisplayMember = drv["Name"].ToString();
lstCheckedKeyID.Add(KeyFieldName);
lstCheckedKeyName.Add(DisplayMember);
}
}
GetCheckedKeyID(node);
}

}

private void txtRole_Closed(object sender, DevExpress.XtraEditors.Controls.ClosedEventArgs e)
{
}

void txtRole_CustomDisplayText(object sender, DevExpress.XtraEditors.Controls.CustomDisplayTextEventArgs e)
{
e.DisplayText = lblKeyName.Text;
}
}