gridview 怎么删除一行记录

gridview 如何删除一行记录
大家注意我的datasource，我猜测这是我用的很多code不起作用的原因。在我的程序中，gv.DataKeys.Count=0！

C# code

DataTable dt = DB.GetAllLines(Int32.Parse(lblGameID.Text));gv.DataSource = dt;gv.DataBind();

gridview的设置：

HTML code

            <asp:GridView ID="gv" runat="server" AutoGenerateDeleteButton="True"                 BorderColor="#99FF99" BorderStyle="Solid" BorderWidth="1px"                 EmptyDataText="没有任何选项" AutoGenerateColumns="False"                 onrowdeleting="gv_RowDeleting">                <RowStyle HorizontalAlign="Center" VerticalAlign="Middle" />                <Columns>                    <asp:BoundField DataField="line_id" Visible="False" />                    <asp:BoundField DataField="line_text" HeaderText="选项"/>                    <asp:BoundField DataField="line_odds" HeaderText="赔率"/>                    <asp:BoundField DataField="line_status" HeaderText="状态" />                </Columns>                <HeaderStyle BorderStyle="Solid" BorderWidth="1px" HorizontalAlign="Center"                     VerticalAlign="Middle" />                <AlternatingRowStyle BackColor="#9999FF" HorizontalAlign="Center"                     VerticalAlign="Middle" Width="695px" Wrap="False" />            </asp:GridView>

这个是我的一个尝试：

C# code

        protected void gv_RowDeleting(object sender, GridViewDeleteEventArgs e)        {                       GridViewRow row = gv.Rows[e.RowIndex];            int result = DB.DeleteLine(Int32.Parse(row.Cells[0].ToString()));            gv.DeleteRow(e.RowIndex);                    }

------解决方案--------------------------------------------------------
晕,你gridview不定义DataKeyNames,用DataKeyNames绑定你数据库主键,这样删除就OK拉
string id = this.GridView1.DataKeys[e.RowIndex]["id"].ToString();
string deda = "delete from tablename where id='" + id + "'";

<asp:GridView ID="GridView1" runat="server" Width="603px" Font-Size="12px" ForeColor="#333333"
AllowPaging="True" AutoGenerateColumns="False" DataKeyNames="id" OnPageIndexChanging="GridView1_PageIndexChanging"
OnRowDeleting="GridView1_RowDeleting">
<Columns>
<asp:HyperLinkField DataTextField="company_name" DataNavigateUrlFields="id" DataNavigateUrlFormatString="UpdateJobCompany.aspx?Id={0}"
HeaderText="公司名称">
<HeaderStyle Width="350px" HorizontalAlign="Center" />
<ItemStyle Width="350px" HorizontalAlign="Center" />
</asp:HyperLinkField>
<asp:BoundField DataField="company_address" HeaderText="公司地址" SortExpression="company_address">
<HeaderStyle Width="350px" HorizontalAlign="Center" />
<ItemStyle Width="350px" HorizontalAlign="Center" />