為了答謝大家對(duì)無(wú)須迭代兩個(gè)循環(huán)完成樹(shù)結(jié)構(gòu)構(gòu)建的支持特公布這兩天新寫(xiě)的部門選擇控件源代碼,該控件最早是用一個(gè)用戶控件實(shí)現(xiàn)數(shù)據(jù)調(diào)用采用Linq界面采用AtlasControlToolkit PopupControl實(shí)現(xiàn),但后來(lái)發(fā)現(xiàn)效率非常低,最近對(duì)其進(jìn)行了很大的優(yōu)化,數(shù)據(jù)調(diào)用優(yōu)化,控件形式優(yōu)化.

該控件采用了Nikhil Kothari的Atlas M2.2 - Dynamic UpdatePanels (finally)的UpdatePanels within Composite Controls原型 here.并對(duì)其進(jìn)行了部分改動(dòng),在這里謝謝了.

web頁(yè)面截圖如下:

?

IPartialRenderingCompositeControl接口沒(méi)動(dòng)

public interface IPartialRenderingCompositeControl

{

????void RenderUpdatePanel(CompositionUpdatePanel updatePanel, HtmlTextWriter writer);

}

CompositionUpdatePanel修改了內(nèi)嵌類Template的代碼

public class CompositionUpdatePanel : UpdatePanel

{

????private IPartialRenderingCompositeControl _compositeControl;

????private ContentControl _content;

????public CompositionUpdatePanel(IPartialRenderingCompositeControl compositeControl)

????{

???? _compositeControl = compositeControl;

???? _content = new ContentControl();

???? ContentTemplate = new Template(_content);

????}

????public Control Content

????{

???? get

???? {

????????return _content;

???? }

????}

????protected override void OnInit(EventArgs e)

????{

???? base.OnInit(e);

???? Controls.Clear();

???? Controls.Add(_content);

????}

????private class Template : ITemplate

????{

???? private ContentControl _ContentControl;

???? public Template(ContentControl content)

???? {

????????_ContentControl = content;

???? }

???? public void InstantiateIn(Control container)

???? {

????????container.Controls.Add(_ContentControl);

???? }

????}

????private class ContentControl : Control

????{

???? protected override void Render(HtmlTextWriter writer)

???? {

????????CompositionUpdatePanel updatePanel = (CompositionUpdatePanel)Parent;

????????if (updatePanel._compositeControl != null)

????????{

???????? updatePanel._compositeControl.RenderUpdatePanel(updatePanel, writer);

????????}

????????else

????????{

???????? base.RenderChildren(writer);

????????}

???? }

????}

}

樹(shù)圖代碼:

[ToolboxData("<{0}:DepartmentTreeView runat=server></{0}:DepartmentTreeView>")]

public class DepartmentTreeView : CompositeControl, IPartialRenderingCompositeControl

{

????private CompositionUpdatePanel _Container;

????private TreeView _DepartmentTreeView;

????public event EventHandler DepartmentIDChanged;

????public Nullable<Guid> DepartmentID

????{

???? get

???? {

????????return (Nullable<Guid>)this.ViewState["DepartmentID"];

???? }

???? set

???? {

????????if ((Nullable<Guid>)this.ViewState["DepartmentID"] != value)

????????{

???????? this.ViewState["DepartmentID"] = value;

???????? if (value.HasValue)

???????? {

????????????AIO.Web.Utils.TreeViewUtils.TreeViewSelectValue(_DepartmentTreeView, value.Value.ToString());

????????????this.ViewState["DepartmentName"] = _DepartmentTreeView.SelectedNode.Text;

???????? }

???????? else

???????? {

????????????if (_DepartmentTreeView.SelectedNode != null)

????????????{

???????????? _DepartmentTreeView.SelectedNode.Selected = false;

???????????? this.ViewState["DepartmentName"] = String.Empty;

????????????}

???????? }

????????}

???? }

????}

????public string DepartmentName

????{

???? get

???? {

????????return (string)this.ViewState["DepartmentName"];

???? }

????}

????public void ClearSelected()

????{

???? if(_DepartmentTreeView.SelectedNode != null)

???? {

????????_DepartmentTreeView.SelectedNode.Selected = false;

???? }

????}

????protected void BuildTree()

????{

???? _DepartmentTreeView.Nodes.Clear();

???? _DepartmentTreeView.Nodes.Add(new TreeNode("Null"));

???? DataSet ds = AIO.WIT.Data.DepartmentDataObject.ReadCore();

???? int

???? TreeNode[] Nodes = new TreeNode[Count + 1];

???? Nullable<int>[] ParentSQNs = new Nullable<int>[Count + 1];

???? foreach (DataRow dr in ds.Tables[0].Rows)

???? {

????????Nodes[((int)dr["DepartmentSQN"])] = new TreeNode((string)dr["DepartmentName"], ((Guid)dr["DepartmentID"]).ToString());

????????if (dr["ParentSQN"].GetType() == typeof(DBNull))

????????{

???????? ParentSQNs[(int)dr["DepartmentSQN"]] = null;

????????}

????????else

????????{

???????? ParentSQNs[(int)dr["DepartmentSQN"]] = (int)dr["ParentSQN"];

????????}

???? }

???? for (int i = 1; i < Count + 1; i++)

???? {

????????if (ParentSQNs[i].HasValue)

????????{

???????? Nodes[ParentSQNs[i].Value].ChildNodes.Add(Nodes[i]);

????????}

????????else

????????{

???????? _DepartmentTreeView.Nodes.Add(Nodes[i]);

????????}

???? }

????}

????protected override void OnInit(EventArgs e)

????{

???? base.OnInit(e);

????}

????protected override void CreateChildControls()

????{

???? _Container = new CompositionUpdatePanel(this);

???? _Container.Mode = UpdatePanelMode.Conditional;

???? _Container.RenderMode = UpdatePanelRenderMode.Inline;

???? _Container.ID = "Container";

???? Controls.Add(_Container);

???? _DepartmentTreeView = new TreeView();

???? _DepartmentTreeView.ID = "DepartmentTreeView";

???? BuildTree();

???? _DepartmentTreeView.SelectedNodeChanged += delegate(object sender, EventArgs e)

???? {

????????if (_DepartmentTreeView.SelectedNode.Text == "Null")

????????{

???????? this.ViewState["DepartmentID"] = null;

???????? this.ViewState["DepartmentName"] = String.Empty;

????????}

????????else

????????{

???????? this.ViewState["DepartmentID"] = new Guid(_DepartmentTreeView.SelectedNode.Value);

???????? this.ViewState["DepartmentName"] = _DepartmentTreeView.SelectedNode.Text;

????????}

????????if (DepartmentIDChanged != null)

????????{

???????? DepartmentIDChanged(this, new EventArgs());

????????}

???? };

???? _Container.Content.Controls.Add(_DepartmentTreeView);

????}

????void IPartialRenderingCompositeControl.RenderUpdatePanel(CompositionUpdatePanel updatePanel, HtmlTextWriter writer)

????{

???? _DepartmentTreeView.RenderControl(writer);

????}

}

部門選擇代碼:

?

[ToolboxData("<{0}:DepartmentSelect runat=server></{0}:DepartmentSelect>")]

public class DepartmentSelect : CompositeControl, IPartialRenderingCompositeControl

{

????private CompositionUpdatePanel _Container;

????private TextBox _DepartmentTextBox;

????private Panel _DepartmentTreeViewPanel;

????private DepartmentTreeView _DepartmentTreeView;

????private PopupControlExtender _PopupControlExtender;

????private PopupControlProperties _PopupControlProperties;

????public Nullable<Guid> DepartmentID

????{

???? get

???? {

????????return _DepartmentTreeView.DepartmentID;

???? }

???? set

???? {

????????_DepartmentTreeView.DepartmentID = value;

???? }

????}

????protected override void OnInit(EventArgs e)

????{

???? base.OnInit(e);

????}

????protected override void CreateChildControls()

????{

???? _Container = new CompositionUpdatePanel(this);

???? _Container.Mode = UpdatePanelMode.Conditional;

???? _Container.RenderMode = UpdatePanelRenderMode.Inline;

???? _Container.ID = "Container";

???? Controls.Add(_Container);

???? _DepartmentTextBox = new TextBox();

???? _DepartmentTextBox.ID = "DepartmentTextBox";

???? _Container.Content.Controls.Add(_DepartmentTextBox);

???? _DepartmentTreeViewPanel = new Panel();

???? _DepartmentTreeViewPanel.ID = "DepartmentTreeViewPanel";

???? _DepartmentTreeViewPanel.CssClass = "PopupControl";

???? _DepartmentTreeView = new DepartmentTreeView();

???? _DepartmentTreeView.ID = "DepartmentTreeView";

???? _DepartmentTreeView.DepartmentIDChanged += delegate(object sender, EventArgs e)

???? {

????????_DepartmentTextBox.Text = _DepartmentTreeView.DepartmentName;

????????_DepartmentTreeView.ClearSelected();

????????_PopupControlExtender.Commit(_DepartmentTreeView.DepartmentName);

???? };

???? _DepartmentTreeViewPanel.Controls.Add(_DepartmentTreeView);

???? _Container.Content.Controls.Add(_DepartmentTreeViewPanel);

???? _PopupControlProperties = new PopupControlProperties();

???? _PopupControlProperties.ID = "PopupControlProperties";

???? _PopupControlProperties.TargetControlID = "DepartmentTextBox";

???? _PopupControlProperties.PopupControlID = "DepartmentTreeViewPanel";

???? _PopupControlProperties.Position = PopupControlPopupPosition.Bottom;

???? _PopupControlExtender = new PopupControlExtender();

???? _PopupControlExtender.ID = "PopupControlExtender";

???? _PopupControlExtender.TargetProperties.Add(_PopupControlProperties);

???? Controls.Add(_PopupControlExtender);

????}

????void IPartialRenderingCompositeControl.RenderUpdatePanel(CompositionUpdatePanel updatePanel, HtmlTextWriter writer)

????{

???? _DepartmentTextBox.RenderControl(writer);

???? _DepartmentTreeViewPanel.RenderControl(writer);

???? _PopupControlExtender.RenderControl(writer);

????}

}

TreeViewUtils代碼:

?

public class TreeViewUtils

{

????public static void TreeViewExpandToSelected(TreeView tv)

????{

???? TreeNode tmp = tv.SelectedNode;

???? if (tmp != null)

???? {

????????while (tmp.Parent != null)

????????{

???????? tmp = tmp.Parent;

???????? tmp.Expand();

????????}

???? }

????}

????public static Boolean TreeViewSelectValue(TreeView tv, string value)

????{

???? Boolean bResult = false;

???? foreach (TreeNode tr in tv.Nodes)

???? {

????????if (TreeViewSelectValue(tr, value))

????????{

???????? bResult = true;

???????? break;

????????}

???? }

???? if (bResult)

???? {

????????TreeViewExpandToSelected(tv);

???? }

???? else

???? {

????????if (tv.SelectedNode != null)

????????{

???????? tv.SelectedNode.Selected = false;

????????}

???? }

???? return bResult;

????}

????protected static Boolean TreeViewSelectValue(TreeNode tr, string value)

????{

???? if (tr.Value == value)

???? {

????????tr.Selected = true;

????????return true;

???? }

???? foreach (TreeNode test in tr.ChildNodes)

???? {

????????if (TreeViewSelectValue(test, value))

????????{

???????? return true;

????????}

???? }

???? return false;

????}

}

?數(shù)據(jù)庫(kù)訪問(wèn)代碼:

[DataObject(true)]

public class DepartmentDataObject

{

????[DataObjectMethod(DataObjectMethodType.Select, true)]

????public static DataSet ReadCore()

????{

???? Database db = DatabaseFactory.CreateDatabase("WorkItemTrack");

???? string sqlCommand = "Department_SelectCore";

???? DbCommand dbCommand = db.GetStoredProcCommand(sqlCommand);

???? db.AddReturnValueParameter(dbCommand);

???? return db.ExecuteDataSet(dbCommand);

????}

}

存儲(chǔ)過(guò)程代碼:

ALTER PROCEDURE dbo.Department_SelectCore ????

AS

????SET NOCOUNT ON

SELECT

Department.DepartmentID,

Department.DepartmentSQN,

Department.DepartmentName,

Department.ParentID,

Parent.DepartmentSQN AS ParentSQN

FROM Department

LEFT OUTER JOIN Department AS Parent ON Parent.DepartmentID = Department.ParentID

ORDER BY Department.DepartmentSQN

????RETURN

?

表格:

?

DepartmentID uniqueidentifier,

DepartmentSQN int,

DepartmentName nvarchar(32),

ParentID uniqueidentifier

完整代碼下載DepartmentSelect.rar

轉(zhuǎn)載于:https://www.cnblogs.com/Bolik/archive/2006/09/11/501141.html

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