使用jquery获取客户端ID
问题描述:
我试图验证一个文本框,通过使用下面的获取客户端ID然后测试其值 该文本框位于更新面板中的ModalPopupExtender 然而,JQuery似乎没有返回任何东西,控制始终是NULL 该文本框是一个gridview使用jquery获取客户端ID
<asp:TemplateField HeaderText="Quick Donate">
<ItemTemplate>
<asp:Button ID="btnQuickDonate" runat="server"
CommandName="Insert"
CommandArgument="<%# ((GridViewRow) Container).RowIndex %>"
OnClick="btnQuickDonate"
Text="Quick Donate" />
<ajaxToolkit:ModalPopupExtender ID="ModalDonationPopup" runat="server" TargetControlID="btnQuickDonate" PopupControlID="Panel1" BackgroundCssClass="modalBackground">
</ajaxToolkit:ModalPopupExtender>
<asp:Panel ID="Panel1" runat="server" CssClass="modalPopup" Style="display: none">
Enter Donation Amount<br />
<table>
<tr>
<td></td>
<td>
<asp:Button ID="btnOnePound" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="1" />
<asp:Button ID="btnFivePound" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="5" />
<asp:Button ID="btnTenPound" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="10" />
<asp:Button ID="btnFifteenPound" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="15" />
<asp:Button ID="btnTwentyPounds" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="20" />
<asp:Button ID="btnTwentyFivePounds" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="25" />
<asp:Button ID="btnThirtyPounds" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="30" />
<asp:Button ID="btnFiftyPounds" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" OnClick="btnQuickDonate" Text="50" />
</td>
</tr>
<%-- --%>
</table>
<br />
<asp:TextBox ID="txtFreeDonationAmount" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" ></asp:TextBox>
**<asp:Button ID="btnOK" runat="server" CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" Text="OK" OnClientClick="return valtxtBoxFreeDonation();" OnClick="btnQuickDonate"></asp:Button>**
<br />
<asp:Button ID="btnCancel" runat="server" Text="Cancel" />
</asp:Panel>
的Javascript下面我也曾尝试在$( '#txtFreeDonationAmount')没有快乐...
function valtxtBoxFreeDonation() {
var txtDonation = $('#<%=txtFreeDonationAmount.ClientID %>');
if (txtDonation.val().length < 0) {
// do something
apprise("Please Enter a Donation Amount before click okay");
return false;
}
}
答
大胆的解决方案是jsut采取这个id'GridView1_btnOK_1`并在你的JS中使用它。
$('#GridView1_txtFreeDonationAmount_0')
而作为对$('#<%=txtFreeDonationAmount.ClientID %>')
mentiones只会工作,如果你的JS是在同一个.aspx
文件。
+0
感谢这似乎工作 – AShah 2014-11-25 14:55:17
答
这代码:
var txtDonation = $('#<%=txtFreeDonationAmount.ClientID %>');
只有当JavaScript在.aspx
文件中时才能正常工作。
检查所生成的HTML,看看ID属性存在有 – 2014-11-25 14:06:25
----这是在调试器中返回的html代码的代码,看起来ID已经发生了相当大的变化 – AShah 2014-11-25 14:15:29
---这是正确的输出 – AShah 2014-11-25 14:26:09