listbox"/>
c# listbox
1. 全选与取消全选
//取消全选
for (int i = 0; i < listBox1.Items.Count; i++){listBox1.SetItemChecked(i, false);}//全选
for (int i = 0; i < listBox1.Items.Count; i++){listBox1.SetItemChecked(i, true);}
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c# listbox
listbox"/>
//取消全选
for (int i = 0; i < listBox1.Items.Count; i++){listBox1.SetItemChecked(i, false);}//全选
for (int i = 0; i < listBox1.Items.Count; i++){listBox1.SetItemChecked(i, true);}
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c# listbox
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