asp.net - 无论数据如何，如何设置转发器控件的控件值

Question

这是中继器：

<asp:Repeater ID="rptrReports" runat="server">
            <ItemTemplate>
                <div style="margin: 2">
                    <asp:Label ID="lblAccount" runat="server" Text='<%#Eval("Account").FullName%>'  />&nbsp;
                    <asp:TextBox ID="txtDescription" runat="server" MaxLength="256" Text='<%#Eval("Description")%>'
                        ReadOnly="<%# Not Account.IsAdmin %>" BackColor="<%# If(Account.IsAdmin,Color.White, Color.Transparent)  %>"
                        BorderStyle="<%# If(admin, BorderStyle.NotSet, BorderStyle.None) %>" 
                        />&nbsp;
                    <asp:TextBox ID="txtNote" runat="server" MaxLength="1024" Text='<%#Eval("Note")%>'
                        ReadOnly="<%# Not Account.IsAdmin %>" BackColor="<%# If(Account.IsAdmin,Color.White, Color.Transparent)  %>"
                        BorderStyle="<%# If(admin, BorderStyle.NotSet, BorderStyle.None) %>" />&nbsp;
                    <!-- Here I have many more controls which I want to apply same rules !-->
                </div>
     </ItemTemplate>
</asp:Repeater>

我想在代码中动态设置 itemtemplate 的这些控件，这样 asp.net 代码不应该看起来那么难看：

Private Sub HandleTextBoxes()
    Dim admin = Account.IsAdmin
    For Each tb As TextBox In _
                        From c In rptrReports.Controls  _
                        Where TypeOf c Is TextBox 'ItemTemplate doesn't expose the properties :(
        With tb
            .ReadOnly = Not admin
            .BackColor = If(admin, Color.White, Color.Transparent)
            .BorderStyle = If(admin, BorderStyle.NotSet, BorderStyle.None)
        End With
    Next
End Sub

另一方面，我不想单独设置它或每个绑定的 ItemTemplate，我想通过父控件（中继器）本身来设置它。

C# 中的答案也将受到欢迎！

Answer 1

我能想到的唯一方法是连接ItemDataBound到Repeater

protected void rptrReports_ItemDataBound(object sender, RepeaterItemEventArgs e) {
  var admin = Account.IsAdmin;
  var txtDescription = (TextBox) e.Item.FindControl("txtDescription");
  var txtNote = (TextBox) e.Item.FindControl("txtNote");
  txtDescription.ReadOnly = admin;
  txtDescription.BackColor = admin ? Color.White : Color.Transparent;
  //...
}

如果要选择所有文本框，可以执行以下操作：

var textBoxes = e.Item.Controls.OfType<TextBox>();
foreach (TextBox textBox in textBoxes) {
  // do stuff with the textBox...
}

如果你不想使用ItemDataBound事件，你可以把这段代码放在Page_PreRender方法中：

protected void Page_PreRender(object sender, EventArgs e) {
  for (int i = 0 ; i < rInterlocuteurs.Items.Count ; i++) {
    var textBoxes = rInterlocuteurs.Items[i].Controls.OfType<TextBox>();
    foreach (TextBox textBox in textBoxes) {
      // do stuff with the textBox...
    }
  }
}

Answer 2

VB：

Private Shared Sub HandleTextBoxes(ByVal controls As ControlCollection)
    Dim admin = Account.IsAdmin

    If controls.Count > 0 Then
        For Each Control In controls
            HandleTextBoxes(Control.Controls)
        Next
    End If

    For Each tb As TextBox In _
                        From c In controls _
                        Where TypeOf c Is TextBox
        With tb
            .ReadOnly = Not admin
            .BackColor = If(admin, Color.White, Color.Transparent)
            .BorderStyle = If(admin, BorderStyle.NotSet, BorderStyle.None)
        End With
    Next
End Sub

C＃：

private static void HandleTextBoxes(ControlCollection controls)
{
    var admin = Account.IsAdmin;

    if (controls.Count > 0) 
        foreach (var Control in controls)
            HandleTextBoxes(Control.Controls);        

    foreach (TextBox tb in controls) {        
        tb.ReadOnly = !admin;
        tb.BackColor = admin ? Color.White : Color.Transparent;
        tb.BorderStyle = admin ? BorderStyle.NotSet : BorderStyle.None;
    }
}