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private void btncx_Click(object sender, EventArgs e)
{
DataView view = set.Tables[0].DefaultView;
if (cmdlx.Text!= "全部" )
{
view.RowFilter = "txtname like '%" + txtname.Text + "%'";
}
DG.DataSource = view;
DataTable dt=set.Tables[0];
if (cmdlx.Text == "全部" )
{
dt=dt.Select( "txtname like '%" + txtname.Text + "%'").CopyToDataTable();
DG.DataSource =dt;
}