索引超出范围

Question

提示如下错误：索引超出范围。必须为非负值并小于集合大小。
参数名: index  private void BindGrid()
    {
        //string connStr = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString;
        //string SqlStr = "SELECT a.*,b.description FROM test01 a,xueli b where a.xueli=b.code and a.id<1000 and a.id>200";
        string connStr = "Data Source='localhost';Initial Catalog='test';User Id='sa';Password='123456'";
        string SqlStr = "select * from login";
        DataSet ds = new DataSet();
        try
        {
            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlDataAdapter da = new SqlDataAdapter(SqlStr, conn);
            da.Fill(ds, "login");
            if (conn.State.ToString() == "Open") conn.Close();
            GridView1.DataSource = ds.Tables[0].DefaultView;
            GridView1.DataBind();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }
    }
{
        GridViewRow row = GridView1.Rows[e.RowIndex];
        //string username = ((TextBox)row.FindControl("username")).Text.ToString();
        int ID = int.Parse(GridView1.DataKeys[e.RowIndex].Values[0].ToString());        string connStr = "Data Source='localhost';Initial Catalog='test';User Id='sa';Password='123456'";
        string SqlStr = "delete from login where ID="+ID+"";
        Response.Write(ID);
        try
        {
            SqlConnection conn = new SqlConnection(connStr);
            if (conn.State.ToString() == "Closed") conn.Open();
            SqlCommand comm = new SqlCommand(SqlStr, conn);
            comm.ExecuteNonQuery();
            comm.Dispose();
            if (conn.State.ToString() == "Open") conn.Close();
            GridView1.EditIndex = -1;
            BindGrid();
        }
        catch (Exception ex)
        {
            Response.Write("数据库错误，错误原因：" + ex.Message);
            Response.End();
        }    }

Answer 1

ds.Tables[0].DefaultView你确定这个里有值啊？？
就这么写？？如果没值，不报索引超出范围，报什么错？？

Answer 2

嗯
dataview = ds!=null&&ds.Tables.Count>0?ds.Tables[0].DefaultView:null;

Answer 3

dataview = ds!=null&&ds.Tables.Count>0?ds.Tables[0].DefaultView:null;

Answer 4

 int ID = int.Parse(GridView1.DataKeys[e.RowIndex].Values[0].ToString());
这一句的错，看属性DataKeysName有直吗？