我試圖驗證一個文本框,通過使用下面的獲取客戶端ID然後測試其值 該文本框位於更新面板中的ModalPopupExtender 然而,JQuery似乎沒有返回任何東西,控制始終是NULL 該文本框是一個gridview使用jquery獲取客戶端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下面我也曾嘗試在$( '#txtFreeDonationAmount')沒有快樂...
function valtxtBoxFreeDonation() {
var txtDonation = $('#<%=txtFreeDonationAmount.ClientID %>');
if (txtDonation.val().length < 0) {
// do something
apprise("Please Enter a Donation Amount before click okay");
return false;
}
}
檢查所生成的HTML,看看ID屬性存在有 – 2014-11-25 14:06:25
----這是在調試器中返回的html代碼的代碼,看起來ID已經發生了相當大的變化 – AShah 2014-11-25 14:15:29
---這是正確的輸出 – AShah 2014-11-25 14:26:09