Hello Luca,
Thank you for writing.
To prevent the change in the selection, in the MouseDown event of the button in the custom cell, you should set the control element Tag with some value, so later you would know whether the selection request comes from the button or not:
Then you should create a descendant of RadListView and override the OnMouseUp property and return if the Tag is filled with your value:
Here is a whole example you can test with:
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
radListView1 = new MyRadListView();
radListView1.Parent = this;
radListView1.Dock = DockStyle.Fill;
radListView1.CellCreating += radListView1_CellCreating;
radListView1.ViewType = ListViewType.DetailsView;
DataTable dt = new DataTable();
dt.Columns.Add("Id", typeof(int));
dt.Columns.Add("Name", typeof(string));
for (int i = 0; i < 50; i++)
{
dt.Rows.Add(i, "Item " + i);
}
this.radListView1.DataSource = dt;
}
private void radListView1_CellCreating(object sender, ListViewCellElementCreatingEventArgs e)
{
DetailListViewDataCellElement cell = e.CellElement as DetailListViewDataCellElement;
if (cell != null && cell.Data.Name == "Name")
{
e.CellElement = new CustomDetailListViewDataCellElement(cell.RowElement, e.CellElement.Data);
}
}
class MyRadListView : RadListView
{
protected override void OnMouseUp(MouseEventArgs e)
{
if (this.ListViewElement.ViewElement.Tag + "" == "ButtonIsClicked")
{
this.ListViewElement.ViewElement.Tag = null;
return;
}
base.OnMouseUp(e);
}
public override string ThemeClassName
{
get
{
return typeof(RadListView).FullName;
}
}
}
public class CustomDetailListViewDataCellElement : DetailListViewDataCellElement
{
private RadButtonElement button;
public CustomDetailListViewDataCellElement(DetailListViewVisualItem owner,
ListViewDetailColumn column) : base(owner, column)
{
}
protected override void CreateChildElements()
{
base.CreateChildElements();
this.button = new RadButtonElement();
button.MouseDown += Button_MouseDown;
this.Children.Add(this.button);
}
private void Button_MouseDown(object sender, MouseEventArgs e)
{
this.RowElement.CellsContainer.Context.Tag = "ButtonIsClicked";
}
protected override Type ThemeEffectiveType
{
get
{
return typeof(DetailListViewHeaderCellElement);
}
}
public override void Synchronize()
{
base.Synchronize();
this.Text = "";
DataRowView rowView = this.Row.DataBoundItem as DataRowView;
this.button.Text = rowView.Row["Name"].ToString();
}
public override bool IsCompatible(ListViewDetailColumn data, object context)
{
if (data.Name != "Name")
{
return false;
}
return base.IsCompatible(data, context);
}
}
I hope that you find this information useful. Should you have any other questions, do not hesitate to contact us.
Regards,
Stefan
Telerik
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