Question

我有一个显示所有行程的gridview - 在该gridview中我有一个转发器，显示在该行程中访问过的国家（一对多）。我的转发器假设要绘制tripID然后填充数据源，该数据源填充转发器。不幸的是，我的转发器正在填充指定的最后一个tripID。

  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="pkiTripID"
                    DataSourceID="SqlDataSource2" PageSize="20" AllowPaging="True" 
                    Width="100%" AllowSorting="True"
                    GridLines="None" onrowdatabound="GridView1_RowDataBound1">                 
                    <Columns>
                        <asp:BoundField DataField="TripType1" HeaderText="Type" SortExpression="TripType1" />
                        <asp:BoundField DataField="RegionName" HeaderText="Region" SortExpression="RegionName" />
                        <asp:TemplateField HeaderText="Country" HeaderStyle-ForeColor="#FF7900">
                            <ItemTemplate>
                                <asp:Repeater ID="RepeatCountry" runat="server"  
                                    DataSourceID="dsCountryByTripID" onitemdatabound="RepeatCountry_ItemDataBound">
                                    <ItemTemplate>
                                        <%# DataBinder.Eval(Container.DataItem, "CountryName") %>
                                    </ItemTemplate>
                                </asp:Repeater>
                            </ItemTemplate>
                            <HeaderStyle ForeColor="#FF7900" />
                        </asp:TemplateField>
                        <asp:BoundField DataField="OverallRating" HeaderText="Trip Rating" 
                            SortExpression="OverallRating" />
                        <asp:BoundField DataField="DepartureDate" HeaderText="Date" SortExpression="DepartureDate"
                            DataFormatString="{0:MMM-dd-yyyy}" HtmlEncode="false" />
                    </Columns>
                </asp:GridView> 

 <asp:SqlDataSource ID="dsCountryByTripID" runat="server" 
        ConnectionString="<%$ ConnectionStrings:myDB %>" 
        SelectCommand="spSelectCountriesByTripID" SelectCommandType="StoredProcedure">
        <SelectParameters>
        <asp:Parameter Type="Int32" Name="tripID"  DefaultValue="96" />
        </SelectParameters>
    </asp:SqlDataSource>

我的代码背后

  protected void GridView1_RowDataBound1(object sender, GridViewRowEventArgs e)
    {
        Repeater rp = (Repeater)e.Row.FindControl("RepeatCountry");

        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            dsCountryByTripID.SelectParameters.Clear();
            DataRowView drv = (DataRowView)e.Row.DataItem;
            string tripID = (drv["pkiTripId"]).ToString();
            dsCountryByTripID.SelectParameters.Clear();
            dsCountryByTripID.SelectParameters.Add("tripID", DbType.Int32, tripID);
            ////gv2.DataBind();
            //e.Row.DataBind();

        }
    }
    protected void RepeatCountry_ItemDataBound(object sender, RepeaterItemEventArgs e)
    {
        e.Item.DataBind();
    }

Answer 1

项目数据绑定重新绑定对我来说是错误的。它将在每一行重新绑定，这可能解释了为什么你只得到第一行。我认为你应该做的就是彻底删除所有并将RowDataBound1更改为：

protected void GridView1_RowDataBound1(object sender, GridViewRowEventArgs e)
{
    Repeater rp = (Repeater)e.Row.FindControl("RepeatCountry");

    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        dsCountryByTripID.SelectParameters.Clear();
        DataRowView drv = (DataRowView)e.Row.DataItem;
        string tripID = (drv["pkiTripId"]).ToString();
        dsCountryByTripID.SelectParameters.Clear();
        dsCountryByTripID.SelectParameters.Add("tripID", DbType.Int32, tripID);

        rp.DataBind();

    }
}

希望这有帮助。

Answer 2

我决定不使用DataSource并使用我自己的，在移动到下一行之前，我给了我更多的灵活性来绑定gridview中的转发器（不需要gridview）。

Gridview中的中继器 - 仅从最后一个gridview ID拉出的Repeater（导致每个中继器相同）

2 个答案: