C# 为什么rowdatabound可以'；在gridview中找不到链接按钮？

我试图通过RowDataBound从gridview获取链接按钮，但它返回null，为什么？名字是正确的。即使您可以在代码中看到，但它仍然不起作用

GridView：

     <asp:GridView ID="grdViewWorks" OnRowDataBound="grdViewWorks_RowDataBound" runat="server" OnRowCommand="grdViewWorks_RowCommand" AutoGenerateColumns="false" EmptyDataText="No Data Found"
CssClass="table table-responsive table-bordered table-striped">
    <Columns>
        <asp:TemplateField HeaderText="Work No">
            <ItemTemplate>
                <asp:Label ID="lblWorkNo" runat="server" Text='<%# Eval("WorkNo") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="NIT No">
            <ItemTemplate>
                <asp:Label ID="lblNITNo" runat="server" Text='<%# Eval("NIT_No") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:BoundField DataField="WorkName" HeaderText="Work Name" />
        <asp:BoundField DataField="OpeningDate" HeaderText="Opening Date" />
        <asp:BoundField DataField="OpeningTime" HeaderText="Opening Time" />
        <asp:BoundField DataField="OrganizationName" HeaderText="Organization" />
        <asp:BoundField DataField="OfficeName" HeaderText="Office" />
        <asp:TemplateField HeaderText="Show Contractors">
            <ItemTemplate>
                <asp:LinkButton ID="btnShowContractors" runat="server" Text="Show Contractors"
                    OnClick="btnShowContractors_Click"></asp:LinkButton>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

---

lb总是空的。为什么?

在将任何内容放入rowdatabound事件之前，必须使用此条件

  if (e.Row.RowType == DataControlRowType.DataRow)
    {
       LinkButton lb = e.Row.FindControl("btnShowContractors") as LinkButton;
        ScriptManager.GetCurrent(this).RegisterPostBackControl(lb);
     }

这样试试

if (e.Row.RowType == DataControlRowType.DataRow)
{
LinkButton lb = e.Row.FindControl("btnShowContractors") as LinkButton;
}

if (e.Row.RowType == DataControlRowType.DataRow)
{
LinkButton lb = e.Row.FindControl("btnShowContractors") as LinkButton;
}