我有一个动态添加到DNN页面的用户控件。
此用户控件基于CheckBoxList(以及另一个基于CheckBoxList的自定义控件,它只在Pre_Render中有一些代码来获取有关当前用户的信息),并且可能需要使用验证器。在控件上,我有一个CustomValidator,它的ClientValidationFunction也设置为控件上的javascript块。
它很漂亮。事实上,完美无缺。 ...除了第一次点击“提交”按钮。
在后面的VB代码中,使用简单的DataSource = x,DataBind ...等等等等来快速填充CheckBoxList。 ASCX方面的控件非常简单。但是,第一次单击包含此控件的页面上的提交按钮时,它不会触发ClientValidationFunction。第二次,作品。第三次,工作。
在下面,找到我的ASCX的全部内容:
<%@ Control Language="vb"
Inherits="MyCustom.Modules.WebApps.WebAppsFormBuilderControls.WebAppsFormBuilder_Controls_CustomCheckboxList"
CodeFile="WebAppsFormBuilder_Controls_CustomCheckboxList.ascx.vb"
AutoEventWireup="false" Explicit="True" %>
<script type="text/javascript">
function ValidateCheckboxList(source, args) {
//window.alert('starting');
var chkListModules = document.getElementById('<%= cbValue.ClientID %>');
var chkListinputs = chkListModules.getElementsByTagName("input");
for (var i = 0; i < chkListinputs.length; i++) {
if (chkListinputs[i].checked) {
args.IsValid = true;
}
}
args.IsValid = false;
//window.alert('IsValid = ' + args.IsValid);
}
</script>
<myCustom:CheckBoxList ID="cbValue" runat="server" />
<asp:Literal ID="Literal1" runat="server">
<font color="red" bold="true">*</font>
</asp:Literal>
<asp:CustomValidator runat="server"
ForeColor="Red" ID="cvCheckBoxList"
ClientValidationFunction="ValidateCheckboxList"
ErrorMessage="At least one item must be selected." />
用户控件的VB:
Imports System
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports MyCustom.Modules
Namespace MyCustom.Controls
Public Class CheckBoxList
Inherits System.Web.UI.WebControls.CheckBoxList
Private _GlobalID As Integer
Public Property GlobalID() As Integer
Get
Return _GlobalID
End Get
Set(ByVal value As Integer)
_GlobalID = value
End Set
End Property
Private Sub CheckBoxList_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender
Dim User As MyCustom.Modules.Users.UserInfo = HttpContext.Current.Items("LoggedInUser")
If User Is Nothing Then
Dim objUserInfo As UserInfo = UserController.GetCurrentUserInfo
Dim UserID As Integer = objUserInfo.UserID
If UserID > -1 Then
If HttpContext.Current.Items("LoggedInMyCustomUser") Is Nothing Then
Dim myCustomUserController As New MyCustom.Modules.Users.UserController
User = myCustomUserController.MyCustomGetUser(6, UserID, True)
HttpContext.Current.Items("LoggedInMyCustomUser") = User
Else
User = HttpContext.Current.Items("LoggedInMyCustomUser")
End If
End If
End If
If User Is Nothing Then Exit Sub
Dim MyCache As New GlobalTextCache(User.CorpID)
For Each li As ListItem In Me.Items
Dim NewVal As String
NewVal = MyCache.GetGlobalText(li.Text, User.PreferredLocale, User.CorpID)
If NewVal IsNot Nothing AndAlso _
NewVal <> "" Then
li.Text = NewVal
End If
Next
End Sub
End Class
End Namespace
有什么想法吗?
答案 0 :(得分:0)
关于我的设置的一些事情是扔掉一把猴子扳手。因此,我放弃了客户端验证,转而使用服务器端验证。
只需在CustomValidator上设置 OnServerValidate 属性:
<asp:CustomValidator runat="server" ForeColor="Red" ID="cvCheckBoxList" OnServerValidate="cvCheckBoxList_ServerValidate" ErrorMessage="At least one item must be selected." />
然后,在自定义控件上填写函数(其中cbValue是CheckBoxList控件):
Protected Sub cvCheckBoxList_ServerValidate(source As Object, args As System.Web.UI.WebControls.ServerValidateEventArgs) Handles cvCheckBoxList.ServerValidate
Dim isValid = False
For Each c As ListItem In cbValue.Items
If c.Selected Then
isValid = True
End If
Next
args.IsValid = isValid
End Sub
在stackoverflow上找到了此服务器端解决方案here。