学习Ext.Net.Dropdownlist，将它于TreePanel结合

发布日期：2017年03月02日文章来源：www.tengways.com

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今天介绍一个关于Ext.Net.Dropdownlist的延伸知识，Ext.Net.Dropdownlist结合TreePanel。

<%--

<ext:DropDownField ID="ddldepartment" runat="server" Editable="false" FieldLabel="申请单位" AnchorHorizontal="100%" >

<ext:TreePanel ID="TreePanel1" runat="server" Icon="ApplicationHome" Height="300"

Shadow="None" UseArrows="true" AutoScroll="true" Animate="true" EnableDD="true"

ContainerScroll="true" RootVisible="false">

<ext:Button ID="btnclose" runat="server" Text="关闭">

</Listeners>

</ext:Button>

</Buttons>

<Root>

</Root>

</Listeners>

</ext:TreePanel>

</Component>

</Listeners>

</ext:DropDownField>

--%>

后台：

<%--

[csharp] view plain copy

protected void Page_Load(object sender, EventArgs e)

{

if (!X.IsAjaxRequest)

{

string strsql = "select * from Framework";

DABaseAccess db = new DABaseAccess("OA");

DataTable dt = new DataTable();

dt = db.Query(strsql.ToString());

if (dt.Rows.Count > 0)

{

this.BuildTree(this.TreePanel1.Root, dt);

}

else

{

JScript.Alert("没有取得数据", this.Page);

}

/// <summary>

/// TreePanel

/// </summary>

/// <param name="allData"></param>

/// <returns></returns>

public TreeNode BindTreePanel(DataTable allData)

{

TreeNode topNode = new TreeNode();

topNode.NodeID = "0";

topNode.Text = "Root";

if (allData != null && allData.Rows.Count > 0)

{

DataRow[] items = allData.Select("FParentID=-1");

if (items != null && items.Length > 0)

{

DataSet ds = new DataSet();

ds.Merge(items);

DataTable SourseTable = ds.Tables[0];

for (int i = 0; i < SourseTable.Rows.Count; i++)

{

TreeNode Tvn = new TreeNode();

Tvn.Expandable = ThreeStateBool.True;

Tvn.NodeID = SourseTable.Rows[i]["FID"].ToString();

Tvn.Text = SourseTable.Rows[i]["FNAME"].ToString();

DataRow[] isChildNode = allData.Select("fparentid=" + SourseTable.Rows[i]["FID"].ToString());

if (isChildNode.Length <= 0)

{

Tvn.Leaf = true;

Tvn.Checked = Ext.Net.ThreeStateBool.False;

}

if (isChildNode.Length > 0) Tvn.Icon = Icon.FolderGo;

else Tvn.Icon = Icon.Table;

BindSubTreePanel(Tvn, allData, SourseTable.Rows[i]["FID"].ToString());

topNode.Nodes.Add(Tvn);

}

return topNode;

}

private void BindSubTreePanel(TreeNode TrNode, DataTable allData, string parentID)

{

DataRow[] items = allData.Select("FParentID=" + parentID);

if (items != null && items.Length > 0)

{

DataSet ds = new DataSet();

ds.Merge(items);

DataTable dt = ds.Tables[0];

for (int i = 0; i < dt.Rows.Count; i++)

{

TreeNode Tvn = new TreeNode();

Tvn.Icon = Icon.Note;

Tvn.NodeID = dt.Rows[i]["FID"].ToString();

Tvn.Text = dt.Rows[i]["FNAME"].ToString();

DataRow[] isChildNode = allData.Select("fparentid=" + dt.Rows[i]["FID"].ToString());

if (isChildNode.Length <= 0)

{

Tvn.Leaf = true;

Tvn.Checked = Ext.Net.ThreeStateBool.False;

}

if (isChildNode.Length > 0) Tvn.Icon = Icon.FolderGo;

else Tvn.Icon = Icon.Table;

BindSubTreePanel(Tvn, allData, dt.Rows[i]["FID"].ToString());

TrNode.Nodes.Add(Tvn);

}

private Ext.Net.TreeNodeCollection BuildTree(Ext.Net.TreeNodeCollection root, DataTable dt)

{

root.Add(this.BindTreePanel(dt));

return root;

}

--%>

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学习Ext.Net.Dropdownlist，将它于TreePanel结合