hidden-field

I have created a hidden form element <form name="UploadImage" enctype="multipart/form-data" method="post" action="UploadImage"> <label> </label> <input name="imgUploadObjId" id="imgUploadObjId" value="52" type="hidden"> //rest of the form here </form> And I am trying to get the value with this line in a servlet (as I have done before): int objId = Integer.parseInt(request.getParameter("imgUploadObjId")); But I get this (line 33 is the line above): java.lang.NumberFormatException: null java.lang.Integer.parseInt(Unknown Source) java.lang.Integer.parseInt(Unknown Source) web.objects.UploadImage

I am building a page which contains many charts, which are displayed one at a time depending on which tab you are looking at. The chart in the initially active tab renders correctly. However when I click to another tab, the chart is not rendered properly. Presumably this is because the hidden field does not have dimensions until it is made visible. In fact if I resize the window the chart will correct it's proportions, and render so that it fills the available width. I can fix this problem by explicitly defining the chart size via css, but this defeats the responsive aspect of the charts. Can

Here's my problem. I have a hidden field whose value I change through a javascript method. The problem is after postback the value is lost. How can I persist the value after postback? Thanks! .aspx File <asp:HiddenField ID="HiddenField1" runat="server" /> <asp:Button ID="BtnGuardar" runat="server" OnClick="BtnGuardar_Click" OnClientClick="return GridUpdateInfoOK()" /> .js file document.getElementById('<%= HiddenField1.ClientID %>').value = 'TEST'; .aspx.cs file protected void BtnGuardar_Click(object sender, EventArgs e) { String test = HiddenField1.Value; } You don't need to have the hidden

I have following form: <form name="frmInput"> <input type="hidden" ng-model="record.usersId" value="{{user.userId}}"/> <input type="hidden" ng-model="record.userNameId" value="{{user.userNameId}}"/> <label for="fileNo">AccountId</label> <input id="fileNo" ng-model="record.fileNo" required/> <label for="madeSad">MadeSad</label> <input id="madeSad" ng-model="record.madeSadNo" required/> <button ng-disabled="!frmInput.$valid" ng-click="SaveRecord(record)">Accept</button> </form> I get record.fileNo and record.madeSadNo in SaveRecord function but i don't get record.usersId and record.userNameId in

I've read this , but I'm new to RoR so I'm having a little trouble understanding it. I'm using a form to create a new request record, and all of the variables that I need to send exist already. Here is the data I need to send (this is in a do loop): :user_id => w[:requesteeID] :requesteeName => current_user.name :requesteeEmail => current_user.email :info => e Here's my form, which works so far, but only send NULL values for everything: <% form_for(:request, :url => requests_path) do |f| %> <div class="actions"> <%= f.submit e %> </div> <% end %> How do I use hidden_fields to send the data I

I am trying to call the resetyear function and its getting called also but the flow stops at alert("over"), it doesnt tranfer its control to resetmaster. Please suggest me something. String flag = ""; flag = (String) session.getAttribute("flag"); System.out.println("flag = " + flag); if (flag == null) { flag = ""; } if (flag.equals("yes")) { %> <script> alert(1); // resetyear(); dontreset(); //document.getElementById("checkyear").value = "1"; //alert(document.getElementById("checkyear").value); </script> <%} else if(flag.equals("no")) {%> <script> alert(2); //document.getElementById("checkyear

I wanna do something like this in rails Here is what I have so far in rails: <%= form_for @order do |f| %> <%= f.hidden_field :service, "test" %> <%= f.submit %> <% end %> But then I get this error: undefined method `merge' for "test":String How can I pass values in my hidden_field in rails? You should do: <%= f.hidden_field :service, :value => "test" %> hidden_field expects a hash as a second argument user132447 You are using a hidden_field instead of a hidden_field_tag. Because you are using the non-_tag version, it is assumed that your controller has already set the value for that attribute