如何从 DetailsView控件中提取某个数据项的值 ?

Question

试了多次也不能于DetailsView控件中,
提取某个数据项的值
Labelshow Label 只傳回空白 , 
为何呢????topic.aspx
 <asp:DetailsView ID="DetailsView" runat="server" Height="50px" Width="900px" AutoGenerateRows="False" ShowHeader="false" GridLines="None" OnItemInserting="DetailsView_ItemDataBound">
        <Fields>
            <asp:TemplateField SortExpression="topic">
                <ItemTemplate>
                <div align="center"><asp:Label ID="Label1" runat="server" Text='<%# Eval("topic") %>'></asp:Label></div>
                </ItemTemplate>
                   ................................
    </asp:DetailsView>
    <asp:Label ID="Labelshow" runat="server"></asp:Label>
topic.aspx.csstring topic;    protected void Page_Load(object sender, EventArgs e)
    {
            string connString = WebConfigurationManager.ConnectionStrings["AString"].ConnectionString;
            SqlConnection conn = new SqlConnection(connString);
            conn.Open();
            SqlCommand cmd = new SqlCommand("select * from data", conn);
            SqlDataReader dr = cmd.ExecuteReader();
            DetailsView.DataSource = dr;
            DetailsView.DataBind();
            dr.Close();
            conn.Close();
            Labelshow.Text = topic;
}
    protected void DetailsView_ItemDataBound(object sender, DetailsViewInsertEventArgs e)
    {
        topic = ((Label)(dDetailsView.FindControl("Label1"))).Text;
                             或
        topic = ((Label)(dDetailsView.Rows[0].FindControl("Label1"))).Text; 
    } 

Answer 1

detaileview 一共就2列，行数也是固定的，和你要显示的数量一样，你只要写
DetailView1.Rows[i].Cells[1].Text, 若你有内嵌控件的话，用fingdcontrol就可以了

Answer 2

DetailsView没有ItemDataBound事件吧？
GridView控件也没有。
DataList控件有ItemDataBound事件。

Answer 3

可不可以提供 code , 不太明白 ....string topic = DetailView1.Rows[i].Cells[1].Text; ???

Answer 4

我估计
protected void DetailsView_ItemDataBound(object sender, DetailsViewInsertEventArgs e)
    {
        topic = ((Label)(dDetailsView.FindControl("Label1"))).Text;
                             或
        topic = ((Label)(dDetailsView.Rows[0].FindControl("Label1"))).Text; 
    } 这一段不会执行因为 OnItemInserting="DetailsView_ItemDataBound" 这个事件不知道什么时候会触发

Answer 5

protected void DetailsView1_PreRender(object sender, EventArgs e)
    {
        if (this.IsPostBack)
        {
            if (DetailsView1.CurrentMode == DetailsViewMode.Edit)
            {
                
                Label lblsex = DetailsView1.FindControl("lblsex") as Label;
            }
        }
    }

Answer 6

還是不行
            
if (DetailsView.CurrentMode == DetailsViewMode.ReadOnly)
            {                Label Labelshow = DetailsView.FindControl("Label1") as Label;
            }

Answer 7

我在DetailsView_DataBound事件中测试是可以取到值的　　protected void DetailsView_DataBound(object sender, EventArgs e)
    {
        Labelshow.Text = (DetailsView.FindControl("Label1") as System.Web.UI.WebControls.Label).Text;
    }