问题描述
我正在尝试在链接到UpdatePanel（AsyncPostBackTrigger）的页面中实现一个重新初始化按钮。当我单击按钮时，它处理一个UpdateProgress。
问题在于，由于重新初始化按钮与更新面板链接，因此无法重新初始化UpdatePanel之外的内容。
是否可以在不为整个页面添加UpdatePanel的情况下对UpdatePanel外部的控件进行一些更改？在这种情况下，我想重新初始化UpdatePanel中包含的DropDownList，Textbox和Repeater。
ASPX代码：
<body style="padding: 50px;">
<form id="form1" runat="server">
<asp:Label runat="server" ID="test"></asp:Label>
<asp:HiddenField runat="server" ID="AllDemandsTypeHfi"></asp:HiddenField>
<asp:ScriptManager runat="server" ID="ScriptManager"></asp:ScriptManager>
<asp:Panel runat="server" CssClass="panel-page-title">Création de demande</asp:Panel>
<asp:Panel runat="server" CssClass="panel-primary">
<asp:Panel runat="server" CssClass="panel-heading">Configuration de la recherche</asp:Panel>
<asp:Panel runat="server" CssClass="panel-body">
<asp:Table runat="server">
<asp:TableRow ID="BankRow">
<asp:TableCell>
<asp:Label runat="server">Banque : </asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:DropDownList runat="server" ID="BankDdl" AutoPostBack="true" OnSelectedIndexChanged="BankDdl_SelectedIndexChanged"></asp:DropDownList>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell>
<asp:Label runat="server">Famille : </asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:DropDownList runat="server" ID="FamilyDdl" AutoPostBack="true" OnSelectedIndexChanged="FamilyDdl_SelectedIndexChanged"></asp:DropDownList>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell>
<asp:Label runat="server">Motif : </asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:DropDownList runat="server" ID="MotiveDdl" AutoPostBack="true" OnSelectedIndexChanged="MotiveDdl_SelectedIndexChanged"></asp:DropDownList>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell>
<asp:Label runat="server">Sous-motif : </asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:DropDownList runat="server" ID="SubmotiveDdl" AutoPostBack="true" OnSelectedIndexChanged="SubmotiveDdl_SelectedIndexChanged"></asp:DropDownList>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow>
<asp:TableCell>
<asp:Label runat="server">Mots-clés : </asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:TextBox runat="server" ID="KeywordsTbx" data-target="#modalSuggestions" data-toggle="modal"></asp:TextBox>
<div id="keywordsTbxSuggestions"></div>
<asp:HiddenField runat="server" ID="KeywordsSearchHfi"></asp:HiddenField>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<br />
<asp:Button runat="server" ID="ResearchBtn" Text="Rechercher" OnClick="ResearchBtn_Click" />
<asp:Button runat="server" ID="ReinitializeBtn" Text="Réinitialiser" OnClick="ReinitializeBtn_Click" />
</asp:Panel>
</asp:Panel>
<br />
<asp:UpdatePanel runat="server" ID="ResultsUpnl" ChildrenAsTriggers="true" UpdateMode="Conditional">
<ContentTemplate>
<asp:Panel runat="server" CssClass="panel-primary">
<asp:Panel runat="server" CssClass="panel-heading">Résultat de la recherche </asp:Panel>
<asp:Panel runat="server" CssClass="panel-body">
<asp:Label runat="server" ID="ResultsLb" Text="Veuillez sélectionner les critères de recherche,puis cliquer sur Rechercher."></asp:Label>
<asp:Repeater runat="server" ID="ResultsRpt">
<HeaderTemplate>
<asp:Label runat="server" Text="<b>Type de demande</b>"></asp:Label>
<table>
</HeaderTemplate>
<ItemTemplate>
<asp:Panel runat="server">
<asp:HyperLink runat="server" NavigateUrl='<%# Eval("Link") %>' Text='<%# Eval("Title") %>' Target="_blank"></asp:HyperLink>
</asp:Panel>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
</asp:Panel>
</asp:Panel>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ResearchBtn" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="ReinitializeBtn" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UppDemandsResult" runat="server" DisplayAfter="0">
<ProgressTemplate>
<div style="text-align: center;">
<table style="width: 100%;">
<tr>
<td>
<Loader:LoaderComponent ID="UcLoadingProgess" runat="server" />
</td>
</tr>
</table>
</div>
</ProgressTemplate>
</asp:UpdateProgress>
</form>
</body>
隐藏代码：
private void HandleReinitialization()
{
this.ResultsLb.Text = DemandCreationConstants.ResearchDefaultText;
this.familyDdlSelectedValue = string.Empty;
this.motiveDdlSelectedValue = string.Empty;
this.submotiveDdlSelectedValue = string.Empty;
this.LoadFamilies(true);
this.LoadMotives(false);
this.LoadSubmotives(false);
this.ResultsRpt.DataSource = null;
this.ResultsRpt.DataBind();
this.KeywordsSearchHfi.Value = string.Empty;
this.KeywordsTbx.Text = string.Empty;
LogServiceInstance.Debug("L'utilisateur " + UserSession.UserLogOn + " a réinitialisé la recherche.");
}
HandleReinitialization由事件ReinitializeBtn_Click 启动。
解决方法
如果正确理解，则需要创建UpdatePanel2并将任何控件添加到其中，然后在第一个UpdatePanel1的按钮Click（）方法中调用 Update（）方法。
UpdatePanel2.Update();
更新： 确保将UpdatePanel2的UpdateMode设置为“ Conditional”
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
// Your controls
</ContentTemplate>
</asp:UpdatePanel>
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