Question

How can I highlight the selected TreeNode (UI.WebControls) in ASP.NET? The purpose is to let the user see which category he or she is viewing at the time.

我认为,在每颗“诺德”树上,检查其被选择的财产是否真实,然后将其变换成另一种颜色。我读了“森林”的设置,但对于这种类型的树木,似乎还没有。

另一种想法是将某种 Java印添加到每个 No。

举例来说,这正是《刑法》今天所认为的:

private void BuildTree()
    {
        TreeNode nodeNew = new TreeNode("Unread", MessageFolder.New.ToString());

        TreeNode nodeProcessed = new TreeNode("Read", MessageFolder.Processed.ToString());

        TreeViewFolders.Nodes.Add(nodeNew);
        TreeViewFolders.Nodes.Add(nodeProcessed);
    }

Answer 1

You have to work with the Server Control on the ASPX Page, you can specify the

<asp:TreeView id="LinksTreeView"
            Font-Names= "Arial"
            ForeColor="Blue"
            SelectedNodeStyle-ForeColor="Green"
            SelectedNodeStyle-VerticalPadding="0"
            OnSelectedNodeChanged="Select_Change"   
            runat="server">

Try this and for more infoeck this page

Answer 2

下面是解决非洲伙伴关系问题的一种方式。 NET 4.0, 网上表格,主页。

在介绍网页上,你可以有一 Tree树,如:

<asp:TreeView
    ID="tv"
    runat="server"
    SelectedNodeStyle-BorderStyle="Solid"
    SelectedNodeStyle-HorizontalPadding="5"
    SelectedNodeStyle-VerticalPadding="5" 
    onselectednodechanged="tv_SelectedNodeChanged">
    <Nodes>
        <asp:TreeNode Text="Contact" Value="~/General/Contact.aspx"></asp:TreeNode>
        <asp:TreeNode Text="Change login name" Value="~/General/ChangeLoginName.aspx"></asp:TreeNode>
        <asp:TreeNode Text="Change password" Value="~/General/ChangePassword.aspx"></asp:TreeNode>
        <asp:TreeNode Text="Terms and Policies" Value="~/General/TermsOfUse.aspx"></asp:TreeNode>
    </Nodes>
</asp:TreeView></td>

这里需要指出的是:

(1) 用于航行的URLs被分配到“Value”财产,而不是“NavigateUrl”树群的“Navigate Url”。

(2) We have defined styles for the selected node.

(3) 我们界定了“互换”的活动。这样做的一个简单办法是在“设计观点”中的树冠上翻一番。这还造成在编码背后档案中出现事件手套问题,我们将在某个时候使用。

在密码后面的档案中,需要以下三项职能:

protected void HighlightSelectedLink(TreeNodeCollection nodes, string treeViewSelectedValue)
{
    if (!string.IsNullOrEmpty(treeViewSelectedValue))
    {
        foreach (TreeNode tn in nodes)
        {
            if (tn.Value == treeViewSelectedValue)
            {
                tn.Selected = true;
            }
            else
            {
                tn.Selected = false;
            }

            HighlightSelectedLink(tn.ChildNodes, treeViewSelectedValue);
        }
    }
}

protected void tv_SelectedNodeChanged(object sender, EventArgs e)
{
    string treeViewSelectedValue = tv.SelectedValue;

    if (treeViewSelectedValue.EndsWith(".aspx"))
    {
        Response.BufferOutput = true;
        Response.Redirect(tv.SelectedValue);
    }
}

protected void Page_PreRender(object sender, EventArgs e)
{
    string treeViewSelectedValue = Request.AppRelativeCurrentExecutionFilePath;

    if (!string.IsNullOrEmpty(treeViewSelectedValue))
    {
        TreeNodeCollection nodes = tv.Nodes;
        HighlightSelectedLink(nodes, treeViewSelectedValue);
    }
}

第二项职能是上述手稿。

Answer 3

编号:

protected void tv_SelectedNodeChanged(object sender, EventArgs e)
{
    TreeView tv = (TreeView)sender;
    tv.SelectedNodeStyle.ForeColor = System.Drawing.Color.MidnightBlue;
    tv.SelectedNodeStyle.BackColor = System.Drawing.Color.PowderBlue;
    tv.SelectedNodeStyle.Font.Bold = true;
}

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