Question

我有一个SQL表：

＆＃13;

ID || Title  || FileName || Extension || FileContent

1  || flower ||rose      || jpg       || binary data

2  || flower ||tulip     || jpg       || binary data

3  || cats   ||black-c   || png       || binary data

4  || cats   ||White-c   || jpg       || binary data

5  || Dogs   ||Brown-d   || jpg       || binary data

＆＃13;

我想在一行中显示所有具有相同标题的图片。例如，标题花包含图片等

我也有一个gridview：

＆＃13;

<asp:GridView ID="GridView1" CssClass="gridview" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" OnRowDataBound="RowDataBound" Width="100%"  GridLines="None" SelectedRowStyle-BackColor="#a8c066" runat="server" AutoGenerateColumns="False" DataKeyNames="ID">
        <Columns>
            <asp:BoundField DataField="ID" HeaderText="ID" SortExpression="ID" ReadOnly="True" Visible="false" />       
            <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
            <asp:BoundField DataField="FileName" HeaderText="FileName" SortExpression="FileName" />   
	    <asp:BoundField DataField="FileContent" HeaderText="FileContent" SortExpression="FileContent" visible="false" />       
       </Columns>
</asp:Gridview>

＆＃13;

所以我的目标是选择一行然后点击它。如果所选行的标题是＆＃34; flower＆＃34;它应该加载2个图像。

我已经做过什么/尝试

＆＃13;

 protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
           {
               GridView listBox = sender as GridView;
               int selectedID =  Int32.Parse(listBox.SelectedDataKey.Value.ToString()); 
               LoadDetail(selectedID);
           }

＆＃13;

 void LoadDetail(int id)
            {

                    List<Pic> sb = (from x in myEnt.Pic where x.ID == id select x).ToList();

                    lblTitle.Text = String.Join(", ", sb.Select(x => x.Title));
                    Img1.ImageUrl = "data:Image/jpg;base64," + String.Join(", ", sb.Select(x => Convert.ToBase64String((byte[])x.FileContent)));
        }

＆＃13;

它只显示一张图片，（因为所选的ID），但我也不知道如何提及标题。提前谢谢！

Answer 1

尝试在DataKeys中使用这两列：

DataKeyNames="ID,Title">

var id = listBox.DataKeys[listBox.SelectedIndex].Values["ID"];
var title = listBox.DataKeys[listBox.SelectedIndex].Values["Title"];

如何按标题分组数据？

1 个答案: