回发后UserControl消失

本文介绍了回发后UserControl消失的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

大家好， 我正在动态加载用户控件，效果很好，但是只要我单击用户控件上的按钮，它就会消失，这是我的代码: 昏暗的meetingtypeControl作为控件= LoadControl(〜/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx") 昏暗的subMeetingtypeControl作为控件= LoadControl(〜/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-SubCouncilMeetingSetup.ascx") 受保护的子MeetingTypeButton_Click(ByVal发送者为对象，ByVal e为System.EventArgs)处理MeetingTypeButton.Click MeetingSetupPlaceHolder.Controls.Clear() MeetingtypeControl.ID ="UC1" MeetingSetupPlaceHolder.Controls.Add(meetingtypeControl) 结束子 受保护的Sub subMeetingTypeButton_Click(ByVal发送者作为对象，ByVal e作为System.EventArgs)处理subMeetingTypeButton.Click MeetingSetupPlaceHolder.Controls.Clear() subMeetingtypeControl.ID ="UC2" MeetingSetupPlaceHolder.Controls.Add(subMeetingtypeControl) 结束子 受保护的子Page_Load(以对象的ByBy发件人身份，以System.EventArgs的ByVal e身份)处理Me.Load 如果Page.IsPostBack = False，则 昏暗的meetingtypeControl作为控件= LoadControl(〜/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx") MeetingSetupPlaceHolder.Controls.Add(meetingtypeControl) 如果结束 结束苏 b

Hi all, I am loading usercontrol dynamically, which works fine, but anytime i click a button on the usercontrol it disappears below are my codes: Dim meetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx") Dim subMeetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-SubCouncilMeetingSetup.ascx") Protected Sub meetingTypeButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles meetingTypeButton.Click meetingSetupPlaceHolder.Controls.Clear() meetingtypeControl.ID = "UC1" meetingSetupPlaceHolder.Controls.Add(meetingtypeControl) End Sub Protected Sub subMeetingTypeButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles subMeetingTypeButton.Click meetingSetupPlaceHolder.Controls.Clear() subMeetingtypeControl.ID = "UC2" meetingSetupPlaceHolder.Controls.Add(subMeetingtypeControl) End Sub Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Page.IsPostBack = False Then Dim meetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx") meetingSetupPlaceHolder.Controls.Add(meetingtypeControl) End If End Su b

推荐答案

请替换以下代码. Please replace below code. Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim meetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx") meetingSetupPlaceHolder.Controls.Add(meetingtypeControl) End Sub

Please Vote if this helped you then.

Every PostBack is a new Request.You need to add the Control with each PostBack

添加控件

private void Page_Load(object sender, EventArgs e) { // Dynamically load the control here if (!Page.IsPostBack) { // Do dynamic initialization of controls which need such initialization only once } }

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