private void InvertSelect_Click(object sender, EventArgs e)
{
for (int i = 0; i < ExcelFileList.Items.Count; i++)
{
ExcelFileList.SetItemChecked(i, !ExcelFileList.GetItemChecked(i));
}
}
private void DisSelectAll_Click(object sender, EventArgs e)
{
for (int i = 0; i < ExcelFileList.Items.Count; i++)
{
ExcelFileList.SetItemChecked(i, false);
}
}
