如何从控制到另一个控件传递数据？ [英] How to pass data from a control to another control?

问题描述

我有我想传递一个对象控件，以便它从一个数据库文件名来设置它的数据属性的asp文字元素。下面是我的了：

I have a asp Literal element that I want to pass to an object control to set its data property so that it pulls a filename from a database. Here's what I got:

<asp:FormView ID="Formview1" runat="server" DataSourceID="AccessDataSource1">
<ItemTemplate>
    <object type="video/x-ms-wmv" data='<%= strFileName %>'
        width="450" height="380">
        <!-- this param is required for anyone using IE--><param name="src" value='<%= Filename %>' />
        <param name="autostart" value="false" />
        <param name="controller" value="true" />
    </object>
</ItemTemplate>
</asp:FormView>

背后code：

Partial Class VideoPlayer
Inherits System.Web.UI.Page
Protected strFileName As String

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim con As New OleDbConnection
    Dim dbProvider As String
    Dim dbSource As String
    Dim vidID As Integer = Integer.Parse(Request.QueryString("ID"))

    dbProvider = "PROVIDER=Microsoft.Jet.OLEDB.4.0;"
    dbSource = "Data Source = |DataDirectory|/webvideos.mdb"

    con.ConnectionString = dbProvider & dbSource

    con.Open()
    Dim strSQL As String = "SELECT * FROM Videos WHERE ID=" & vidID
    strFileName = "videos/TrainingVideos/" & Eval("Filename")

    con.Close()
End Sub

End Class

你知道吗？我希望它是简单的，哈哈。

Any idea? I hope it is simple, lol.

推荐答案

我没有处理过的％的咚咚数据绑定标签，但你可以做到这一点：

I've not dealt with the "percent pound" databind tags, but you may be able to do this:

<object type="video/x-ms-wmv" data='<%# "videos/TrainingVideos/" & Eval("Filename") %>'
        width="450" height="380">
        <!-- this param is required for anyone using IE-->
        <param name="src" value='<%# "videos/TrainingVideos/" & Eval("Filename") %>' />
        <param name="autostart" value="false" />
        <param name="controller" value="true" />
    </object>

如果没有 - 您可以将您的文件名+路径加载到页面加载服务器端的一个受保护的全球范围的变量（如 strFilepath ），或宣布一个保护函数，返回文件名+路径（您可能要缓存，如果你将要调用了很多） - 再去做像这样：

If not - you can load your filename + path into a protected global-scope variable (e.g. strFilepath) on the server side in the page load, or declare a protected function that returns the filename + path (which you may want to cache if you are going to be calling it a lot) - then do it like so:

<object type="video/x-ms-wmv" data='<%= getFilepath() %>'
            width="450" height="380">
            <!-- this param is required for anyone using IE-->
            <param name="src" value='<%= getFilepath() %>' />
            <param name="autostart" value="false" />
            <param name="controller" value="true" />
        </object>

然后像这样在code背后：

and then something like this in the code behind:

Protected Function getFilepath() As String    
  Return "file path/filename"
End Sub

或

Protected Dim strFilepath As String
Public Sub Page_Load()
    strFilePath = "file path/filename"
End Sub

随着＆LT;％= strFilepath％GT;

有意义吗？

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