如何访问ListView EditItemTemplate中的控件

Posted 2021-04-15

我有EditItemTemplate的问题。 我在asp listView中使用Telerik RadUpload。 在验证radUpload的事件时，我想检查一些需求，所以我需要findControl两个控件：radUpload和Label

为此，我使用listView的ItemDataBound事件，但问题在于此处，第一个ItemDataBound事件执行，并且在执行RadUpload Validating事件之后，因此radUpload控件和Label控件保持为空

我通过使用静态控制来处理这个问题，但我认为这不是一个好主意。

你有解决方案吗？

另一个问题是标签。但是，我使用静态标签和跟踪显示标签有文本但输出标签没有看到

<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);
        }
    }

答案

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;
        }
    }
}