ObjectListView drag and drop to RichTextBox
本文关键字:to RichTextBox drop and drag ObjectListView | 更新日期: 2023-09-27 18:20:38
所以我有一个对象列表视图(实际上是一个树列表视图)。我希望能够将一个项目从中拖到richtextbox中,并让它插入被拖项目的属性(在本例中为Default_Heirarchy_ID
)
TreeListView的对象模型是一个名为SpecItem
的类的List<T>
。
这就是我目前所拥有的:
public frmAutospecEditor(SpecItem siThis_, List<SpecItem> lstStock_)
{
InitializeComponent();
txtFormula.DragEnter += new DragEventHandler(txtFormula_DragEnter);
txtFormula.DragDrop += new DragEventHandler(txtFormula_DragDrop);
...
}
void txtFormula_DragEnter(object sender, DragEventArgs e)
{
e.Effect = DragDropEffects.Copy;
}
private void tlvSpecItem_ItemDrag(object sender, ItemDragEventArgs e)
{
int intID = ((SpecItem)tlvSpecItem.GetItem(tlvSpecItem.SelectedIndex).RowObject).Default_Heirarchy_ID ??0;
DoDragDrop(intID, DragDropEffects.Copy);
}
private void txtFormula_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
{
object objID = e.Data.GetData(typeof(String));
//this is where it goes wrong - no matter what I try to do with this, it
//always returns either null, or the text displayed for that item in the TreeListView,
//NOT the ID as I want it to.
string strID = (string)objID;
txtFormula.Text = strID;
}
我哪里错了?
干杯
Drag是要从(OLV)获取数据的控件。Drop是目标控件(您的文本框)。因此:
将OLV的IsSimpleDragSource
属性设置为true。
在文本框中,将AllowDrop
属性设置为true。然后处理文本框的DragEnter
事件并使用DragEventArgs
参数。
处理ModelDropped事件:
private void yourOlv_ModelDropped(object sender, ModelDropEventArgs e)
{
// If they didn't drop on anything, then don't do anything
if (e.TargetModel == null) return;
// Use the dropped data:
// ((SpecItem)e.TargetModel)
// foreach (SpecItem si in e.SourceModels) ...
// e.RefreshObjects();
}
阅读更多:http://objectlistview.sourceforge.net/cs/dragdrop.html#ixzz1lEt7LoGr