problem with ToolStripSeparator

问题

I have a toolstrip. For this toolstrip, I am adding ToolStripSplitButton and for this ToolStripSplitButton, I am adding toolstrip items, including ToolStripSeparator. In the click event of the toolstrip items I am retrieving items from the ToolStripSplitButton dropdown using below code.

 ToolStripDropDown tditems = ((System.Windows.Forms.ToolStripDropDownItem)(items[0])).DropDown;
foreach (ToolStripMenuItem item in tditems.Items)
{
//something here
}

As the dropdown items have both toolstrip items and ToolStripSeparator at runtime, it is giving following error.

Additional information: Unable to cast object of type 'System.Windows.Forms.ToolStripSeparator' to type 'System.Windows.Forms.ToolStripMenuItem'.

Can anybody help me?

Thanks

回答1:

If you are using .NET 3.5, you could use the OfType extension method as follows.

foreach (var item in tditems.Items.OfType<ToolStripMenuItem>())
{
    // something here
}

来源：https://stackoverflow.com/questions/1537394/problem-with-toolstripseparator