我需要知道如何让编程选择的节点在“选中”状态下以图形方式进行,就像用户点击它一样。 SelectedNode仅在内部选择此选项。非常感谢你!
答案 0 :(得分:34)
未突出显示的原因是树视图没有焦点。这是我的测试表单上的按钮点击事件:
TreeView1.SelectedNode = TreeView1.Nodes(2);
TreeView1.Focus();
正确突出显示节点。如果您删除Focus();
调用,则在您单击树视图(树视图中的任何位置,不一定是您要选择的节点)之前,它不会突出显示。
答案 1 :(得分:2)
这适用于.net 3.5: 将treeview组件的 DrawMode 属性设置为: OwnerDrawAll 然后在 DrawNode 事件中编写以下内容:
if (((e.State & TreeNodeStates.Selected) != 0) && (!MyTreeView.Focused))
e.Node.ForeColor = Color.Blue;
else
e.DrawDefault = true;
在 BeforeSelect 事件中有:
if (MyTreeView.SelectedNode != null)
MyTreeView.SelectedNode.ForeColor = Color.Black;
e.Node.ForeColor = Color.Blue;
答案 2 :(得分:2)
TreeView1.SelectedNode.BackColor = SystemColors.HighlightText; // This will work
以上解决方案仅将重点放在其上,但不会更改其高亮视图。
答案 3 :(得分:1)
我不知道它是否对您有所帮助,但检查页面的Taborder并确保树视图控件的Tab键顺序为0
答案 4 :(得分:0)
底层Win32控件支持此功能(认为它是TVIS_DROPHILITED
),但我看不到通过TreeView
控件公开的相同功能。
正如theraneman所说,你可以使用TreeNode.ForeColor
和BackColor
属性伪造它......
答案 5 :(得分:0)
我遇到了类似的问题,并希望在表单加载上选择(突出显示) TreeView
节点。
也许有人也有同样的问题。
我首先尝试了Pondidum的解决方案。没有成功。
但后来我在另一个线程中找到了解决方案:只需将TabIndex
的{{1}}设置为0即可。
在这种情况下您不需要设置焦点。只需选择应使用TreeView
选择的节点并设置SelectedNode
即可。就是这样。
答案 6 :(得分:0)
以下是我的工作:
void myProcedure()
{
// Hookup a DrawMode Event Handler
this.myTV.DrawNode += myTV_DrawNode;
// Set DrawMode and HideSelection
this.myTV.DrawMode = TreeViewDrawMode.OwnerDrawText;
this.myTV.HideSelection = false;
// Make sure the TreeView has Focus
this.myTV.Focus();
// Make sure the TreeView is Selected
this.myTV.Select();
// If the TreeView has a Node, I want to select the first Node to demonstrate.
if (this.myTV.Nodes.Count > 0)
{
// Make sure the node is visible
this.myTV.Nodes[0].EnsureVisible();
// Make sure the Node is Selected
this.myTV.SelectedNode = myTV.Nodes[0];
}
// Make sure the SelectedNode IS the Node that we programmatically want to select.
textBox1.Text = this.myTV.SelectedNode.Text;
// if we display sanityCheck1 string, it actually is the correct node.text
// Make sure .NET runtime knows the Node is selected
textBox1.Text += " is Selected = " + this.myTV.SelectedNode.IsSelected.ToString();
}
跟进: laalto 回答了HowView HighLight TreeView.Node的问题。 DrawNode事件处理程序中的以下代码,来自 samball 的答案,根据其选择状态正确突出显示TreeView.Node。
private void myTV_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
// first, let .NET draw the Node with its defaults
e.DrawDefault = true;
// Now update the highlighting or not
if (e.State == TreeNodeStates.Selected)
{
e.Node.BackColor = SystemColors.Highlight;
e.Node.ForeColor = SystemColors.HighlightText;
}
else
{
e.Node.BackColor = ((TreeView)sender).BackColor;
e.Node.ForeColor = ((TreeView)sender).ForeColor;
}
}
平台= Windows 10中的C#.NET 4.5,Visual Studio 2015
答案 7 :(得分:0)
<html>
<head>
<title>Leaflet</title>
<link rel="stylesheet" href="http://unpkg.com/leaflet@1.3.1/dist/leaflet.css" />
<script src="http://unpkg.com/leaflet@1.3.1/dist/leaflet.js"></script>
</head>
<body>
<div style="width:100%; height:100%" id="map"></div>
<script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>
<script src="BetterWMS.js"></script>
<script type='text/javascript'>
var map = new L.Map('map', {center: new L.LatLng(30.176166666666667,79.14880555555557), zoom: 8});
var osm = new L.TileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png');
map.addLayer(osm);
var Forest_Data = L.tileLayer.wms('http://localhost:8080/geoserver/cite/wms', {
format: 'image/png',layers: 'cite:Forest_Data',transparent: 'true'
}).addTo(map);
</script>
</body>
</html>
and "BetterWMS.js" file is -
L.TileLayer.BetterWMS = L.TileLayer.WMS.extend({
onAdd: function (mapid) {
// Triggered when the layer is added to a map.
// Register a click listener, then do all the upstream WMS things
L.TileLayer.WMS.prototype.onAdd.call(this, mapid);
map.on('click', this.getFeatureInfo, this);
},
onRemove: function (mapid) {
// Triggered when the layer is removed from a map.
// Unregister a click listener, then do all the upstream WMS things
L.TileLayer.WMS.prototype.onRemove.call(this, mapid);
map.off('click', this.getFeatureInfo, this);
},
getFeatureInfo: function (evt) {
// Make an AJAX request to the server and hope for the best
var url = this.getFeatureInfoUrl(evt.latlng),
showResults = L.Util.bind(this.showGetFeatureInfo, this);
$.ajax({
url: url,
success: function (data, status, xhr) {
var err = typeof data === 'string' ? null : data;
showResults(err, evt.latlng, data);
},
error: function (xhr, status, error) {
showResults(error);
}
});
},
getFeatureInfoUrl: function (latlng) {
// Construct a GetFeatureInfo request URL given a point
var point = this._map.latLngToContainerPoint(latlng, this._map.getZoom()),
size = this._map.getSize(),
params = {
request: 'GetFeatureInfo',
service: 'WMS',
srs: 'EPSG:4326',
styles: this.wmsParams.styles,
transparent: this.wmsParams.transparent,
version: this.wmsParams.version,
format: this.wmsParams.format,
bbox: this._map.getBounds().toBBoxString(),
height: size.y,
width: size.x,
layers: this.wmsParams.layers,
query_layers: this.wmsParams.layers,
info_format: 'text/html'
};
params[params.version === '1.3.0' ? 'i' : 'x'] = point.x;
params[params.version === '1.3.0' ? 'j' : 'y'] = point.y;
return this._url + L.Util.getParamString(params, this._url, true);
},
showGetFeatureInfo: function (err, latlng, content) {
if (err) { console.log(err); return; } // do nothing if there's an error
// Otherwise show the content in a popup, or something.
L.popup({ maxWidth: 800})
.setLatLng(latlng)
.setContent(content)
.openOn(this._map);
}
});
L.tileLayer.betterWms = function (url, options) {
return new L.TileLayer.BetterWMS(url, options);
};
这对我有效(.net 4.7)
答案 8 :(得分:-1)
不确定,但是你不能改变那个节点的背景颜色吗?