索引超出范围。必须为非负值并小于集合大小。

string dbPath = @"D:\历年高考分数.db";
string sq = @"Data Source=" + dbPath;
m = new SQLiteConnection(sq);
m.Open();
SQLiteDataAdapter mAdapter = new SQLiteDataAdapter("select Volume1,Volume2 from 饼形图", m);
DataSet ds = new DataSet();
mAdapter.Fill(ds);
DataTable dt = ds.Tables[0];
//设置图表的数据源
Chart1.DataSource = dt;
Chart1.Series.Clear();
Chart1.Series[0].XValueMember = "Volume1";//X轴数据成员列
Chart1.Series[0].YValueMembers = "Volume2";//Y轴数据成员列
Chart1.Series[0].IsValueShownAsLabel = true;//显示坐标
Chart1.DataBind();
m.Close();

//Chart1.Series.Clear();注释掉看看

Series已经清空了，Series[0]肯定不存在了