如何访问 ListView EditItemTemplate 中的控件

Question

我对 EditItemTemplate 有疑问。
我在 asp listView 中使用 Telerik RadUpload。
在验证radUpload的事件时，我想检查一些要求，所以我需要findControl两个控件：radUpload和Label

为此，我使用 ListView 的 ItemDataBound 事件 但问题出在这里，首先执行 ItemDataBound 事件，然后执行 RadUpload Validating 事件，因此 radUpload 控件和标签控件保持为空

我通过使用静态控制以某种方式处理此问题，但我认为这不是一个好主意。

您对此有解决方案吗？

另一个问题是标签。但是我使用静态标签并在跟踪中显示标签有文本但在输出标签中看不到

<asp:ListView ID="LvAdminRing" runat="server" ItemPlaceholderID="ItemPlaceHolder" GroupPlaceholderID="GroupPlaceHolder"
             OnItemEditing="LvAdminRing_ItemEditing" OnItemDataBound="onItemDataBound" OnItemUpdating="LvAdminRing_ItemUpdating">
            <LayoutTemplate>
                <div>
                    <asp:PlaceHolder runat="server" ID="GroupPlaceHolder"></asp:PlaceHolder>
                </div>
            </LayoutTemplate>
            <GroupTemplate>
                <div>
                    <asp:PlaceHolder runat="server" ID="ItemPlaceHolder"></asp:PlaceHolder>
                </div>
            </GroupTemplate>
            <ItemTemplate>

                <div class="RadRingTileDIV col-lg-12" runat="server">
                    <div class="row RadRingItemsDIV">

                        <asp:Label ID="lblPrice" CssClass="CustDispBlock CustItemFonts" runat="server" Text='<%# Eval("XPrice")%>'></asp:Label>
                        <asp:Label ID="lblCode" CssClass="CustDispBlock CustItemFonts" runat="server" Text='<%#  Eval("XCode") %>'></asp:Label>
                    </div>
                    <div class="row RadRingItemsDIV ">
                        <asp:ImageButton ID="ImgRingEdit" runat="server" CommandName="Edit" ImageUrl="~/Image/Admin/CommandsPic/Edit.gif" />
                        <asp:ImageButton ID="ImgRingDel" runat="server" CommandName="Delete" ImageUrl="~/Image/Admin/CommandsPic/Delete.gif" />

                    </div>
                </div>

            </ItemTemplate>
            <EditItemTemplate>

                <div class="RadRingTileDIV col-lg-12" runat="server">
                    <div class="RadRingItemsDIV row">
                        <img src="ksdla" class="AdminImg CustDispBlock" />
                        <telerik:RadUpload ID="RupAdminRingPic" runat="server" AllowedFileExtensions=".png,.jpg,.jpeg,.jpe" AllowedMimeTypes="image/png,image/x-png,image/jpeg,image/pjpeg"
                            MaxFileInputsCount="1" MaxFileSize="52000" OverwriteExistingFiles="False" TargetFolder="~/Image/Products/Ring"
                            OnValidatingFile="RupAdminRingPic_ValidatingFile" ToolTip="انتخاب عکس جدید با پسوند های png،jpg،jpeg و jpe" ControlObjectsVisibility="CheckBoxes">
                        </telerik:RadUpload>
                    </div>
                    <div class="row RadRingItemsDIV">
                        <br />
                        <asp:Button ID="Button1" runat="server" Text="test" CommandName="Update" />
                    </div>
                    <div class="row RadRingItemsDIV">
                        <br />
                        <asp:Label ID="LblError" CssClass="CustDispBlock CustZ-Index" Visible="false"  runat="server" Text=""></asp:Label>
                    </div>
                </div>
            </EditItemTemplate>

        </asp:ListView>

public static Label lblError;

    public static RadUpload RuEditPic;
    public static Label lblError;

    protected void RupAdminRingPic_ValidatingFile(object sender, Telerik.Web.UI.Upload.ValidateFileEventArgs e)
    {
        //Label test = (Label)LvItems.FindControl("LblError");
        string[] AllowedFileExt = RuEditPic.AllowedFileExtensions;
        foreach ( string AllowedExt in AllowedFileExt )
        {
            if (e.UploadedFile.ContentLength > RuEditPic.MaxFileSize)
            {
                lblError.Text = "some error";
                lblError.Visible = true;
            }
        }
    }

    protected void onItemDataBound(object sender, ListViewItemEventArgs e)
    {
        int x = (e.Item as ListViewDataItem).DataItemIndex;

        if (LvAdminRing.EditIndex == (e.Item as ListViewDataItem).DataItemIndex)
        {
            LvItems = LvAdminRing.Items as ListViewDataItem;
            lblError = (e.Item.FindControl("LblError") as Label);
            //errNoti = (e.Item.FindControl("LblError") as Label);
            RuEditPic = (e.Item.FindControl("RupAdminRingPic") as RadUpload);
        }
    }

Answer 1

你应该试试这个。

protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
{
    if (e.Item.ItemType == ListViewItemType.DataItem)
    {

        ListViewDataItem dataItem = (ListViewDataItem)e.Item;
        if (dataItem.DisplayIndex == ListView1.EditIndex)
        {
        TextBox tb = e.Item.FindControl("tbFK_MenuID") as TextBox;
        }
    }
}