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SqlConnection con = new SqlConnection();
SqlCommand cmd = con.CreateCommand();
cmd.CommandText = "select count(1) from stockout";
con.ConnectionString = "server=10.10.66.232;database=uerp;uid=uerp;pwd=uerp5678";
con.Open();
int returnValue = (int)cmd.ExecuteScalar();
Label3.Text = "有" + returnValue.ToString() + "条记录";
con.Close();