禁用ASP.net的TreeView复选框 [英] Disabling ASP.net treeview checkboxes
问题描述
如何将你们有条件的ASP树状禁用复选框?
How would you guys conditionally disable checkboxes in an asp treeview?
例如,如果一个应用程序的用户不具有一定的权限,禁用权限项复选框,在权限树视图。
For instance, if an application user does not have a certain permission, disable that permission entry checkbox in a permissions treeview.
下面就是我要找的,这是在winform应用程序的equivaqlent(其中文本是灰色的复选框被禁用):
Here's what i'm looking for, this is the equivaqlent in a winform app (the checkboxes are disabled where the text is grayed out):
我看到那里的复选框,单击事件被拦截并忽略其他解决方案。我想preFER那里的复选框被简单地设置为禁用的解决方案。
I saw other solutions where the click event on the checkboxes is intercepted and ignored. I would prefer a solution where the checkboxes are simply set to disabled.
我在寻找一个C#解决方案,但会很乐意与一个C#/ JavaScript解决方案。
I'm looking for a C# solution but will be happy with a C#/Javascript solution.
谢谢!
推荐答案
好吧,发现了一个还算干净的解决方案是:
Ok, found a fairly clean solution to this:
在code-背后:
TreeNode newNode = new TreeNode(permission.ToString());
newNode.SelectAction = TreeNodeSelectAction.None; // no Link
if (shouldDisableCheckbox)
{
// Set a class so disabled nodes can be formatted thru CSS
// and be identifiable as disabled in Javascript.
newNode.Text = "<span class=disabledTreeviewNode>" + newNode.Text +"</span>";
}
nodes.Add (newNode);
在Javascript中,扫描所有树状节点为那些有类名和禁用与之关联的复选框:
in Javascript, scan all treeview nodes for those that have that className and disable the checkboxes associated to them:
// Called via a startup script created in Code Behind.
// Disables all treeview checkboxes that have a text with a class=disabledTreeviewNode.
// treeviewID is the ClientID of the treeView
function DisableCheckBoxes(treeviewID)
{
TREEVIEW_ID = treeviewID;
var treeView = document.getElementById(TREEVIEW_ID);
if (treeView)
{
var childCheckBoxes = treeView.getElementsByTagName("input");
for (var i = 0; i < childCheckBoxes.length; i++)
{
var textSpan = GetCheckBoxTextSpan(childCheckBoxes[i]);
if (textSpan.firstChild)
if (textSpan.firstChild.className == "disabledTreeviewNode")
childCheckBoxes[i].disabled = true;
}
}
}
function GetCheckBoxTextSpan(checkBox)
{
// Set label text to node name
var parentDiv = checkBox.parentNode;
var nodeSpan = parentDiv.getElementsByTagName("span");
return nodeSpan[0];
}
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