本文介绍了Radiobuttonlist 事件并不总是触发的处理方法，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
我有一个带有 selectedindexchanged 事件的单选按钮列表，用于更新搜索功能.其中一项是在 aspx 中指定的，其他项是附加的数据绑定项.无论我将什么设置为默认值，该项目都不会触发事件.所有其他项目将触发该事件.另外，似乎在选择死"项后，事件根本不会触发.
I have a radiobuttonlist with a selectedindexchanged event that updates a search function. One of the items is specified in the aspx, and the others are appended databound items. No matter what I set as the default, that item will not fire the event. All other items will fire the event. Also, it seems that after the "dead" item is selected, the event won't fire at all.
如何追踪错误并进行纠正?这是当前代码.
How can I track down the error and correct? Here is current code.
抱歉，如果简短版本具有误导性.我不确定要包括什么.这是整个页面.
Sorry if the short version was misleading. I wasn't sure what to include. Here is the whole page.
所有aspx:
<%@ Page Language="C#" MasterPageFile="~/MSDS/MSDS.master" EnableEventValidation="false"
AutoEventWireup="true" CodeFile="SearchMSDS.aspx.cs" Inherits="MSDS_ByDept" Title="NCLWeb - Search MSDS" %>
<%@ Register Assembly="SqlWhereBuilder" Namespace="UNLV.IAP.WebControls" TagPrefix="cc1" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc2" %>
<asp:Content ID="Content1" ContentPlaceHolderID="PageContent" runat="Server">
<h2>
<asp:Label ID="lblTitle" runat="server">Search Active MSDS</asp:Label></h2>
<table class="style1">
<tr>
<td style="width: 435px" valign="top">
<asp:Panel runat="server" ID="pnlSearch" DefaultButton="btnSearch">
<asp:TextBox ID="txtSimpleSearch" runat="server" Width="262px"></asp:TextBox>
<asp:Button ID="btnSearch" runat="server" Text="Search" Width="96px" OnClick="btnSearch_Click" />
<br />
<asp:LinkButton ID="btnAdvSearch" runat="server" OnClick="btnAdvSearch_Click" Font-Size="Small">Show Advanced Search</asp:LinkButton>
</asp:Panel>
<asp:Panel ID="pnlAdvSearch" runat="server" Width="635px" DefaultButton="btnRunAdvSearch">
<asp:Button ID="btnRunAdvSearch" runat="server" OnClick="btnRunAdvSearch_Click" Text="Advanced Search" />
<cc1:SqlWhereBuilder ID="SqlWhereBuilder1" runat="server" ClientCodeLocation="../JavaScripts/SqlWhereBuilder.js"
FieldsFile="../ConfigFiles/SearchMSDS.config" OperatorListsFile="../ConfigFiles/SearchMSDS.config"
ValueEntryFile="../ConfigFiles/SearchMSDS.config">
</cc1:SqlWhereBuilder>
<br />
<br />
</asp:Panel>
<cc2:CollapsiblePanelExtender ID="pnlAdvSearch_CollapsiblePanelExtender" runat="server"
CollapseControlID="btnAdvSearch" Collapsed="True" Enabled="True" ExpandControlID="btnAdvSearch"
TargetControlID="pnlAdvSearch">
</cc2:CollapsiblePanelExtender>
</td>
<td valign="top">
<asp:Panel ID="pnlStatus" runat="server">
<asp:RadioButtonList ID="rblStatus" runat="server" AppendDataBoundItems="True"
AutoPostBack="True" DataSourceID="SqlDataSource1" DataTextField="DisplayValue"
DataValueField="Value" OnSelectedIndexChanged="RadioButtonList1_SelectedIndexChanged"
RepeatDirection="Horizontal" CellPadding="3" CellSpacing="3"
CausesValidation="True" Visible="True">
<asp:ListItem Selected="True">All</asp:ListItem>
</asp:RadioButtonList>
</asp:Panel>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NCLWebConnectionString %>"
SelectCommand="getOptionList" SelectCommandType="StoredProcedure">
<SelectParameters>
<asp:Parameter DefaultValue="msds_Status" Name="ListName" Type="String" />
</SelectParameters>
</asp:SqlDataSource>
<asp:UpdatePanel runat="server" ID="upd2">
<ContentTemplate>
<asp:Button ID="btnExport" runat="server" Text="Export Results"
OnClick="btnExport_Click1" UseSubmitBehavior="False" />
</ContentTemplate>
</asp:UpdatePanel>
</td>
</tr>
</table>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" DisplayAfter="100" DynamicLayout="False">
<ProgressTemplate>
<img src="../images/loading.gif" alt="Loading..." style="text-align: center" />
<asp:Label ID="lblProgress" runat="server"></asp:Label></ProgressTemplate>
</asp:UpdateProgress>
<asp:GridView ID="gridResults" runat="server" DataSourceID="sqlMSDS" OnRowDataBound="GridView1_RowDataBound"
AllowPaging="True" PageSize="25" AllowSorting="True" OnSelectedIndexChanged="gridResults_SelectedIndexChanged"
AutoGenerateColumns="False" EmptyDataText="No matching MSDS Sheets." OnSorted="gridResults_Sorted">
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False" Visible="false"
ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="ChemicalTitle" HeaderText="ChemicalTitle" SortExpression="ChemicalTitle" />
<asp:BoundField DataField="Manufacturer" HeaderText="Manufacturer" SortExpression="Manufacturer" />
<asp:BoundField DataField="UsageDept" HeaderText="UsageDept" SortExpression="UsageDept" />
<asp:BoundField DataField="Notes" HeaderText="Notes" SortExpression="Notes" />
<asp:BoundField DataField="Health" HeaderText="Health" visible="false" SortExpression="Health" />
<asp:BoundField DataField="Fire" HeaderText="Fire" visible="false" SortExpression="Fire" />
<asp:BoundField DataField="Reactivity" HeaderText="Reactivity" visible="false" SortExpression="Reactivity" />
<asp:BoundField DataField="DateUpdated" HeaderText="DateUpdated" SortExpression="DateUpdated" />
</Columns>
<SelectedRowStyle BackColor="Yellow" />
</asp:GridView>
<asp:SqlDataSource ID="sqlMSDS" OnSelected="sqlMSDS_OnSelected" runat="server" ConnectionString="<%$ ConnectionStrings:NCLWebConnectionString %>"
SelectCommand="SELECT [ID]
,[ChemicalTitle]
,[Manufacturer]
,[UsageDept]
,[Notes]
,[Health]
,[Fire]
,[Reactivity]
,[DateUpdated]
FROM [msds_Sheets]" OnSelecting="sqlMSDS_Selecting"></asp:SqlDataSource>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="btnSearch" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="btnRunAdvSearch" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="rblStatus" EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlID="btnExport" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<br />
</asp:Content>
还有代码隐藏:
List<String> safeWords = new List<String>();
protected void Page_Load(object sender, EventArgs e)
{
pnlStatus.Visible = User.IsInRole("msds_Admin");
gridResults.DataKeyNames = new String[] { "id" };
txtSimpleSearch.Focus();
if (!IsPostBack)
{
safeWords.Add("delete");
safeWords.Add("insert");
safeWords.Add("update");
safeWords.Add("set");
safeWords.Add("exec");
safeWords.Add("N'");
sqlMSDS.SelectCommand += " Where status = 0 ";
Session["Sql"] = sqlMSDS.SelectCommand;
try
{
Session["OriginalSQL"] = sqlMSDS.SelectCommand.Remove(sqlMSDS.SelectCommand.IndexOf("Where"));
}
catch (Exception)
{
Session["OriginalSQL"] = sqlMSDS.SelectCommand;
}
}
}
protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
((Label)UpdateProgress1.FindControl("lblProgress")).Text = "Searching...";
if (btnSearch.Visible)
{
btnSearch_Click(null, null);
if (RadioButtonList1.SelectedValue != "All")
{
sqlMSDS.SelectCommand += " And Status = " + RadioButtonList1.SelectedValue;
}
else
{
//Somehow force the grid to research using no status parameter
sqlMSDS.SelectCommand = Session["Sql"].ToString();
}
}
else
{
btnRunAdvSearch_Click(null, null);
if (RadioButtonList1.SelectedValue != "All")
{
if (sqlMSDS.SelectCommand.Contains("Where"))
{
sqlMSDS.SelectCommand += " And Status = " + RadioButtonList1.SelectedValue;
}
else
{
sqlMSDS.SelectCommand += " Where Status = " + RadioButtonList1.SelectedValue;
}
}
else
{
//Somehow force the grid to research using no status parameter
sqlMSDS.SelectCommand = Session["Sql"].ToString();
}
}
}
推荐答案
这个 RadioButtonList 是否指定为另一个 UpdatePanel 的 AsyncPostBackTrigger?如果是这样，请检查以下链接:CheckedChanged 事件未在 UpdatePanel 内的单选按钮上触发
Does this RadioButtonList specified as AsyncPostBackTrigger for another UpdatePanel? If so, check following link: CheckedChanged event not firing on a radio button within UpdatePanel
我已重现该行为并使用以下脚本修复此问题:
I have reproduce that behaviour and fix this with the following script:
$(function () {
$("input[type='radio']:first", $("#<%= RadioButtonList1.ClientID %>")).attr("checked", true);
});
如果你不能使用 jQuery，试试这个 javascript:
if you can't use the jQuery try this javascript:
window.onload = function () {
window.document.getElementById("<%= RadioButtonList1.ClientID %>_0").checked = true;
};
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ClientScript.RegisterStartupScript(this.GetType(), "RadioButtonListDefaultValue", String.Format("window.document.getElementById('{0}_0').checked = true;", RadioButtonList1.ClientID), true);
}
}
这篇关于Radiobuttonlist 事件并不总是触发的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！