Ändra din kod till detta:
private void TextBox_TextChanged(object sender, EventArgs e)
{
DataView dv = ds.Tables[0].DefaultView;
dv.RowFilter = string.Format("Name like '%{0}%'", Filter.Text);
hauptübersichtgrid.ItemsSource = dv;
}
Ändra din kod till detta:
private void TextBox_TextChanged(object sender, EventArgs e)
{
DataView dv = ds.Tables[0].DefaultView;
dv.RowFilter = string.Format("Name like '%{0}%'", Filter.Text);
hauptübersichtgrid.ItemsSource = dv;
}