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我使用TreeListView有:TreeListView和層次複選框
this.tlv.CheckBoxes = true;
this.tlv.TriStateCheckBoxes = true;
this.tlv.HierarchicalCheckboxes = true;
層次與三態運作良好,除了一個:用戶可以通過點擊鼠標設置CheckState.Indeterminate,我並不需要它。爲此,我使用2個代理工作不正常。如何使這項工作?
this.tvl.CheckStateGetter = delegate(object rowObject)
{
if (((ModelData)rowObject).IsChecked == true)
{
return CheckState.Checked;
}
else
{
if (((ModelData)rowObject).IsChecked == false)
{
return CheckState.Unchecked;
}
else
{
return CheckState.Indeterminate;
}
}
};
this.tvl.CheckStatePutter = delegate(object rowObject, CheckState newValue)
{
if (((ModelData)rowObject).Child.Count > 0)
{
if ((((ModelData)rowObject).Child.Where(x => x.IsChecked != null).Any(x => (bool)x.IsChecked) &&
((ModelData)rowObject).Child.Where(x => x.IsChecked != null).Any(x => !(bool)x.IsChecked)) ||
(((ModelData)rowObject).Child.Any(x => x.IsChecked == null)))
{
((ModelData)rowObject).IsChecked = null;
return CheckState.Indeterminate;
}
else
{
if (((ModelData)rowObject).Child.Where(x => x.IsChecked != null).All(x => (bool)x.IsChecked))
{
((ModelData)rowObject).IsChecked = true;
return CheckState.Checked;
}
else
{
((ModelData)rowObject).IsChecked = false;
return CheckState.Unchecked;
}
}
}
else
{
((ModelData)rowObject).IsChecked = (newValue == CheckState.Checked) ? true : false;
return newValue;
}
};