使用 ASP.NET C# 迭代面板控件中的动态 FileUpload 控件集合

发布于 2024-09-27 18:57:23 字数 1035 浏览 2 评论 0原文

我正在尝试获取添加到面板中的动态生成的 FileUpload 控件的值：

<asp:Panel ID="pFileControls" runat="server">
</asp:Panel>

我在循环记录集期间创建控件：

foreach(DataRow dr in ds.Tables[0].Rows)
{
    FileUpload fu = new FileUpload();
    fu.ID = dr["SomeID"].ToString();

    pFileControls.Controls.Add(fu);
}

正常，直到我使用此按钮提交表单：

<asp:Button ID="btnImportFile" runat="server" Text="Save" OnClick="btnImportFile_Click" />

一切像这样注册（Page_Load）：

ScriptManager.GetCurrent(this).RegisterPostBackControl(btnImportFile);

我这样做是因为我在网站中使用 MasterPage/ContentPage 设置，并且大多数情况都发生在 UpdatePanel 内以实现 AJAXification 目的。请记住，如果我在 HTML 视图中明确指定 FileUpload 控件，则它可以 100% 工作。

提交表单后，我尝试像这样迭代面板：

foreach (Control ctrl in pFileControls.Controls)
{
    if (ctrl.GetType() != typeof(FileUpload))
    {
        continue;
    }

    //Do the saving of the file here
}

除此之外，面板似乎只返回一个控件：页面的内容占位符，仅此而已。有人对此有一些想法吗？

原文

I'm trying to get the values of dynamically generated FileUpload controls that I add to a Panel:

<asp:Panel ID="pFileControls" runat="server">
</asp:Panel>

I create the controls during a loop through a record set:

foreach(DataRow dr in ds.Tables[0].Rows)
{
    FileUpload fu = new FileUpload();
    fu.ID = dr["SomeID"].ToString();

    pFileControls.Controls.Add(fu);
}

Everything works fine up to the point where I submit the form with this button:

<asp:Button ID="btnImportFile" runat="server" Text="Save" OnClick="btnImportFile_Click" />

Which I register like this (Page_Load):

ScriptManager.GetCurrent(this).RegisterPostBackControl(btnImportFile);

I do this because I'm using a MasterPage/ContentPage setting in my website and mostly everything happens inside an UpdatePanel for AJAXification purposes. Bear in mind that if I explicity specify a FileUpload Control in the HTML view, it works 100%.

When the form is submitted I try to iterate the Panel like this:

foreach (Control ctrl in pFileControls.Controls)
{
    if (ctrl.GetType() != typeof(FileUpload))
    {
        continue;
    }

    //Do the saving of the file here
}

Except, the Panel seems to only return one control: The Content Place Holder for the page and nothing else. Does anyone have some ideas about this?

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