DataGrid中EditTemplate内的文本框返回空文本

我想捕获用户在按下更新命令时输入的文本,考虑到我将编辑和更新命令更改为“激活”。

 <asp:DataGrid ID="Datagrid1" runat="server" AutoGenerateColumns="False" Width="100%"
    OnCancelCommand="Datagrid1_CancelCommand" OnEditCommand="Datagrid1_EditCommand"
    OnUpdateCommand="Datagrid1_UpdateCommand">
    <Columns>
        <asp:TemplateColumn>
              <EditItemTemplate>
                <table cellpadding="0" cellspacing="0" width="100%">
                    <tr>
                        <td align="center" style="width: 200px; white-space: nowrap;">
                            <asp:Label ID="Label1" runat="server" Text='<%# Eval("Reg_FullName") %>'></asp:Label>
                        </td>
                        <td align="center" style="width: 100px;">
                            <asp:Label ID="lbl_User" runat="server" Text='<%# Eval("Reg_UserName") %>'></asp:Label>
                        </td>
                        <td align="center" style="width: 100px;">
                            <asp:Label ID="lbl_AddedAt" runat="server" Text='<%# Eval("Reg_ActivatedAt") %>'></asp:Label>
                        </td>
                        <td align="center" style="width: 100px;">
                            <asp:Label ID="lbl_IsAct" runat="server" Text='<%# Eval("Reg_IsActive") %>'></asp:Label>
                        </td>
                        <td align="center" style="width: 100px;">
                            <asp:Label ID="lbl_Days" runat="server" Text="<%$ Resources:Okaz, DaysNum %>"></asp:Label>
                        </td>
                        <td align="center" style="width: 100px;">
                            <asp:TextBox ID="Hello_txt" runat="server"></asp:TextBox>
                        </td>
                    </tr>
                </table>
            </EditItemTemplate></asp:TemplateColumn>
        <asp:EditCommandColumn CancelText="Cancel" EditText="Activate"
            UpdateText="Activate"></asp:EditCommandColumn>

我的代码是:

protected void Datagrid1_EditCommand(object source, DataGridCommandEventArgs e)
    {
        Datagrid1.EditItemIndex = e.Item.ItemIndex;
        try
        {
            SqlDataSource1.SelectCommand = "Select * from OkazRegisteration";
            Datagrid1.DataSourceID = SqlDataSource1.ID;
            Datagrid1.DataBind();
        }
        catch (Exception ex)
        {
            ErrorLabel.Text = ex.ToString();
        }
    }

    protected void Datagrid1_CancelCommand(object source, DataGridCommandEventArgs e)
    {
        Datagrid1.EditItemIndex = -1;
        try
        {
            SqlDataSource1.SelectCommand = "Select * from OkazRegisteration";
            Datagrid1.DataSourceID = SqlDataSource1.ID;
            Datagrid1.DataBind();
        }
        catch (Exception ex)
        {
            ErrorLabel.Text = ex.ToString();
        }
    }

    protected void Datagrid1_UpdateCommand(object source, DataGridCommandEventArgs e)
    {

        switch (e.Item.ItemType)
        {
            case ListItemType.EditItem:

                TextBox txt_Days = (TextBox)e.Item.FindControl("Hello_txt");
                Label lbl_User = (Label)e.Item.FindControl("lbl_User");

                SqlDataSource2.UpdateCommand = "Update OkazRegisteration set Reg_IsActive='True', Reg_ExpiryDays=" + txt_Days.Text + " , Reg_ActivatedAt='" + DateTime.Now.ToShortDateString() + "' Where Reg_UserName='" + lbl_User.Text + "'";
                SqlDataSource2.Update();
                break;
        }
        try
        {
            SqlDataSource1.SelectCommand = "Select * from OkazRegisteration";
            Datagrid1.DataSourceID = SqlDataSource1.ID;
            Datagrid1.DataBind();
        }
        catch (Exception ex)
        {
            ErrorLabel.Text = ex.ToString();
        }
    }

在数据报中1_updateCommand

文本框txt_天的文本值始终为空

我做错什么了??

我做这种工作已经很长时间了,但这次我看不到错误。

请帮忙,

当做。