You can use this method to get the control that caused the postback: /// <summary> /// Retrieves the control that caused the postback. /// </summary> /// <param name=”page”></param> /// <returns></returns> private Control GetControlThatCausedPostBack(Page page) { //initialize a control and set it to null Control ctrl = null; //get the event target name and find the … Read more
That’s not possible with <f:event>. You need to manually check FacesContext#isPostback() inside the listener method. public void init() { if (!FacesContext.getCurrentInstance().isPostback()) { // … } } In the upcoming JSF 2.2 <f:viewAction> tag, which is supposed to replace this <f:event type=”preRenderView”> “workaround”, it will however be possible with the onPostback attribute: <f:viewAction action=”#{defaultNewQuestionHandler.init}” onPostback=”false” /> … Read more
Use <httpRuntime requestValidationMode=”2.0″ /> in your web.config (keeping any attributes you already have on that element, if it’s already there). ASP.NET4.0 ignores ValidateRequest otherwise. And, of course, do make sure that you take necessary measures to protect against genuinely dangerous requests, now that it’s not being done for you. Edit: A great way of doing … Read more
There is no built-in facility to resolve it in asp.net However, there is a workaround for this problem; You need to handle it with javascript. Solution is mentioned here: Maintain Scrollbar Position Inside UpdatePanel After Partial PostBack Edited 20-May-2012; after seeing the comments <form id=”form1″ runat=”server”> <asp:ScriptManager ID=”ScriptManager1″ runat=”server” ScriptMode=”Release” /> <script type=”text/javascript”> // It … Read more
I had the same problem and wanted to contribute this resource where the author created an inherited ListItem Consumer to persist attributes to ViewState. Hopefully it will save someone the time I wasted until I stumbled on it. protected override object SaveViewState() { // create object array for Item count + 1 object[] allStates = … Read more
The following is aimed at beginners to ASP.Net… When does it happen? A postback originates from the client browser. Usually one of the controls on the page will be manipulated by the user (a button clicked or dropdown changed, etc), and this control will initiate a postback. The state of this control, plus all other … Read more
This, import javax.faces.view.ViewScoped; is the JSF 2.2-introduced CDI-specific annotation, intented to be used in combination with CDI-specific bean management annotation @Named. However, you’re using the JSF-specific bean management annotation @ManagedBean. import javax.faces.bean.ManagedBean; You should then be using any of the scopes provided by the very same javax.faces.bean package instead. The right @ViewScoped is over there: … Read more
For anyone else trying to do something like this: don’t. Instead, think of the flow of information and understand that there is a better way to do it. The input control(s) do not need to be dynamically created. They can be static, and upon filling out and submitting on one, that information has to go … Read more
From this article on web.archive.org : The trick is to use the OnClientClick and UseSubmitBehavior properties of the button control. There are other methods, involving code on the server side to add attributes, but I think the simplicity of doing it this way is much more attractive: <asp:Button runat=”server” ID=”BtnSubmit” OnClientClick=”this.disabled = true; this.value=”Submitting…”;” UseSubmitBehavior=”false” … Read more
Here is a complete solution Entire form tag of the asp.net page <form id=”form1″ runat=”server”> <asp:LinkButton ID=”LinkButton1″ runat=”server” /> <%– included to force __doPostBack javascript function to be rendered –%> <input type=”button” id=”Button45″ name=”Button45″ onclick=”javascript:__doPostBack(‘ButtonA’,”)” value=”clicking this will run ButtonA.Click Event Handler” /><br /><br /> <input type=”button” id=”Button46″ name=”Button46″ onclick=”javascript:__doPostBack(‘ButtonB’,”)” value=”clicking this will run ButtonB.Click … Read more