C# 如何在GridView中使用DataBinder.Eval？

我有一个GridView包含标签，我需要根据数据显示/隐藏标签

以下是我的GridView：

<asp:GridView ID="GridView_Profiles" runat="server" CssClass="grid" HorizontalAlign="Center"
                                        OnRowDataBound="GridView_Profiles_OnRowDataBound" CellSpacing="1" GridLines="None"
                                        AutoGenerateColumns="False" Width="90%">
    <Columns>
      <asp:Label ID="Label_SelectedCount" runat="server"> 
        <span style="width:auto;color:White;background-color:#0c95be;height:auto;margin:0px;font-size:12px;cursor:pointer;padding-left:10px;padding-right:10px;padding-top:5px;padding-bottom:5px;">
          <%#Eval("Count") %>
        </span>
      </asp:Label>
     <asp:Label ID="lblNoCount" runat="server" Text="-"></asp:Label>
    </Columns>
</asp:GridView>

---

在上面的GridView

RowDataBound

中，我应该如何使用

DataBinder.Eval

检查边界数据？

使用此选项在带有

DataBinder.Eval

的RowDataBound事件中获取标签：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        // find your label text in gridview with DataBinder.Eval
        string count = DataBinder.Eval(e.Row.DataItem, "Count") as string;

        // find your label control in gridview
        Label lb = (Label)e.Row.FindControl("Label_SelectedCount");

        // check condition to show/hide label (you use your own condition)
        if(count > 0)
            lb.Visible = true;
        else
            lb.Visible = false;

    }
}

或者可以将GridView与

DataBinder.Eval

绑定，如：

<asp:TemplateField HeaderText="Count"
    <ItemTemplate>
        <asp:Label ID="Label_SelectedCount" runat="server" >
            <%# DataBinder.Eval(Container.DataItem, "Count")%>
        </asp:Label>
    </ItemTemplate>
</asp:TemplateField>

---

使用此选项获取带有
DataBinder.Eval的行数据绑定事件中的标签：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        // find your label text in gridview with DataBinder.Eval
        string count = DataBinder.Eval(e.Row.DataItem, "Count") as string;

        // find your label control in gridview
        Label lb = (Label)e.Row.FindControl("Label_SelectedCount");

        // check condition to show/hide label (you use your own condition)
        if(count > 0)
            lb.Visible = true;
        else
            lb.Visible = false;

    }
}

或者可以将GridView与
DataBinder.Eval
绑定，如：

<asp:TemplateField HeaderText="Count"
    <ItemTemplate>
        <asp:Label ID="Label_SelectedCount" runat="server" >
            <%# DataBinder.Eval(Container.DataItem, "Count")%>
        </asp:Label>
    </ItemTemplate>
</asp:TemplateField>