使用DataTable.Importrow方法将数据行从一个数据表复制到另一数据表失败？

Question

我正在尝试将一些行从一个数据表复制到另一数据表，这是我正在使用的代码：-

DataTable dt_query;
public void show_query(int page)
{
    conn.Open();
    SqlDataAdapter sda_query = new SqlDataAdapter("select * from query where resolved='NO'", conn);
    conn.Close();
    DataTable dt = new DataTable();
    sda_query.Fill(dt);
    dt_query.Clear();
    for (int i = (page - 1) * 5; i < page * 5 && i<dt.Rows.Count; i++)
    {
        dt_query.ImportRow(dt.Rows[i]);
    }
    GridView2.DataSource = dt_query;
    GridView2.DataBind();
}

但是gridview最终仅使用自动生成的选择按钮显示5个空白行。 怎么了

gridview的HTML如下：

    <asp:GridView ID="GridView2" 
    runat="server" Width="820px" AutoGenerateSelectButton="True" 
    onselectedindexchanged="GridView2_SelectedIndexChanged" CellPadding="4" 
                    ForeColor="#333333" GridLines="None">
                    <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
                    <EditRowStyle BackColor="#999999" />
                    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
                    <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
                    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
                    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
                    <SortedAscendingCellStyle BackColor="#E9E7E2" />
                    <SortedAscendingHeaderStyle BackColor="#506C8C" />
                    <SortedDescendingCellStyle BackColor="#FFFDF8" />
                    <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>

Answer 1

尝试在fill方法之后关闭连接。 另外，尝试在没有dt_query表的情况下执行此操作。

public void show_query(int page)
{
    conn.Open();
    SqlDataAdapter sda_query = new SqlDataAdapter("select * from query where resolved='NO'", conn);
    DataTable dt = new DataTable();
    sda_query.Fill(dt);
    conn.Close();
    GridView2.DataSource = dt;
    GridView2.DataBind();
}