数据列表中单选按钮上的评估 ID

Question

我的代码需要带有单选按钮的数据列表，并且 iv 使其成为单一可选择的 onitemdatabound...现在我尝试根据选定的单选按钮评估隐藏字段

我的代码就像

后面的aspx 代码

<asp:DataList ID="DataList1" runat="server" RepeatColumns = "4"  CssClass="datalist1" 
                RepeatLayout = "Table"  OnItemDataBound="SOMENAMEItemBound"
                CellSpacing="20" onselectedindexchanged="DataList1_SelectedIndexChanged">
                <ItemTemplate>
                <br />
                <table cellpadding = "5px" cellspacing = "0" class="dlTable">
                <tr>
                <td align="center">
                <a href="<%#Eval("FilePath")%>" target="_blank"><asp:Image ID="Image1" runat="server" CssClass="imu" ImageUrl = '<%# Eval("FilePath")%>' 
                Width = "100px" Height = "100px" style ="cursor:pointer" />
                </td>            
                </tr>
                <tr >
                <td align="center">                    
                <asp:RadioButton ID="rdb" runat="server"  OnCheckedChanged="rdb_click" AutoPostBack="True" />            
                <asp:HiddenField ID="HiddenField1" runat="server" Value = '<%#Eval("ID")%>' /> 
                </td>
                </tr>                     
                </table>

 </ItemTemplate> 
</asp:DataList>

代码

 protected void SOMENAMEItemBound(object sender, DataListItemEventArgs e)
        {
            RadioButton rdb;
            rdb = (RadioButton)e.Item.FindControl("rdb");
            if (rdb != null)
                rdb.Attributes.Add("onclick", "CheckOnes(this);");



        }

  protected void rdb_click(object sender, EventArgs e)
        {
            for (int i = 0; i < DataList1.Items.Count; i++)
            {
                RadioButton rdb;
                rdb = (RadioButton)DataList1.Items[i].FindControl("rdb");
                if (rdb != null)
                {
                    if (rdb.Checked)
                    {
                        HiddenField hf = (HiddenField)DataList1.Items[i].FindControl("HiddenField1");
                        Response.Write(hf.Value);
                    }

                }
            }
        }

JavaScript

function CheckOnes(spanChk){


var oItem = spanChk.children;
var theBox= (spanChk.type=="radio") ?
spanChk : spanChk.children.item[0];

xState=theBox.unchecked;
elm=theBox.form.elements;

for(i=0;i<elm.length;i++)
if(elm[i].type=="radio" &&
elm[i].id!=theBox.id)
{
elm[i].checked=xState;
}
}

我使用...我正在获取像这样的错误

Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near 'pload Demonstration|'.

有没有其他方法可以做到这一点或者任何人都可以帮助摆脱这个问题

Answer 1

问题可能是您的 Response.Write() 调用。看看 此博文。它概述了出现此特定异常的原因以及如何防止它。另请查看此 StackOverflow 线程。

Answer 2

好吧，让我们删除响应写入...现在我的代码隐藏中有以下内容...其余部分

label5.text=hf.value.ToString();

现在相同，当我使用更新面板和嵌套更新面板时，我可以评估标签，就像这样，

<asp:UpdatePanel ID="UpdatePanel9" runat="server" >
                <ContentTemplate>

                <asp:DataList ID="DataList1" runat="server" RepeatColumns = "4"  
                        CssClass="datalist1"  OnItemDataBound="SOMENAMEItemBound"
                CellSpacing="10" onselectedindexchanged="DataList1_SelectedIndexChanged" 
                        HorizontalAlign="Center" Width="500px">
                <ItemTemplate>
                <br />
                <table cellpadding = "5px" cellspacing = "0" class="dlTable">
                <tr>
                <td align="center">
                <a href="<%#Eval("FilePath")%>" target="_blank"><asp:Image ID="Image1" runat="server" CssClass="imu" ImageUrl = '<%# Eval("FilePath")%>' 
                Width = "100px" Height = "100px" style ="cursor:pointer" />
                </td>            
                </tr>
                <tr >
                <td align="center"> 
                    <asp:UpdatePanel ID="UpdatePanel3" runat="server">
                    <Triggers>
                   <asp:PostBackTrigger ControlID="rdb" />
                    </Triggers>
                          <ContentTemplate>          
                <asp:RadioButton ID="rdb" runat="server"  OnCheckedChanged="rdb_click" AutoPostBack="true"  /> 

                 </ContentTemplate> 
                </asp:UpdatePanel>

                <asp:HiddenField ID="HiddenField1" runat="server" Value = '<%#Eval("ID")%>' /> 
                </td>
                </tr>                     
                </table>

 </ItemTemplate> 

</asp:DataList>


         </ContentTemplate>
         </asp:UpdatePanel>

有没有一种方法可以在不完整的情况下完成此操作页面回发....asyncpostback 触发器似乎不起作用