Winforms DotNet ListBox items to word wrap if content string width is bigger than ListBox width?

问题

Ehm, umm, this means some lines should be two-lined in size. My boss think this is more simple solution, than limit displayed text to fit width and don't like horizontal scroll bar >_<

回答1:

lst.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable;
lst.MeasureItem += lst_MeasureItem;
lst.DrawItem += lst_DrawItem;

private void lst_MeasureItem(object sender, MeasureItemEventArgs e)
{
    e.ItemHeight = (int)e.Graphics.MeasureString(lst.Items[e.Index].ToString(), lst.Font, lst.Width).Height;
}

private void lst_DrawItem(object sender, DrawItemEventArgs e)
{
    e.DrawBackground();
    e.DrawFocusRectangle();
    e.Graphics.DrawString(lst.Items[e.Index].ToString(), e.Font, new SolidBrush(e.ForeColor), e.Bounds);
}

回答2:

private void lst_MeasureItem(object sender, MeasureItemEventArgs e)
{
    e.ItemHeight = (int)e.Graphics.MeasureString(lst.Items[e.Index].ToString(), lst.Font, lst.Width).Height;
}

private void lst_DrawItem(object sender, DrawItemEventArgs e)
{
    e.DrawBackground();
    e.DrawFocusRectangle();
    e.Graphics.DrawString(lst.Items[e.Index].ToString(), e.Font, new SolidBrush(e.ForeColor), e.Bounds);
}

To get the right display member to show up when data binding, replace

lst.Items[e.Index].ToString()

with a casted version of the property. So if your binding source is class object Car it would look like

((Car)lst.Items[e.Index]).YourDisplayProperty

Then the above functions can appropriately measure the string and draw it. :)

回答3:

Helpful link

Check out this answer. It overrides the template of the listbox with a textblock which wraps the text. Hope it's useful. To solve your problem I think you shold add : ScrollViewer.HorizontalScrollBarVisibility="Disabled" . Found it here

回答4:

To make binding correct, be sure to add check "lst.Items.Count > 0" to lst_MeasureItem function. Here is my example:

 if (lst.Items.Count > 0)
 {
    e.ItemHeight = (int)e.Graphics.MeasureString(lst.Items[e.Index].ToString(), lst.Font, lst.Width).Height;
 }

Everything else seems to work nicely after that.

来源：https://stackoverflow.com/questions/17613613/winforms-dotnet-listbox-items-to-word-wrap-if-content-string-width-is-bigger-tha

标签

winforms

listbox

width

listboxitem