postback

问题 I have a designed a form for my MVC Web application with which the user can enter details . One of the details is Date which he /she can choose from a DateTime Picker. After entering all the details including Date , I submit the form but instead of going to the next page, the same form reloads with a Validation Error on Date Field and setting 01/01/0001 00:00:00 as the Date. What is the solution ? I have declared my datetime variable like this - [Required] [DisplayFormat(DataFormatString = "

问题 I did some research on JSF view instances: new view, initial view, and postback view. But, I am still not quite sure about the differences. It's kind of confusing and I haven't been able to find a good explanation on that. Can somebody put some light on this one? 回答1: That was how JSF 1.0/1.1 works. They are explained in detail in this ancient IBM article. But you should forget and ignore the whole article (see also "Editor's notes" section on top which was edited in afterwards). It does not

问题 Maybe its a stupid question but I'm not an advanced programmer. I've have successfully setup In-App payments for my app but it only works without using a postback url. I've Google'd around many hours trying to tackle this myself without success. Hopefully anybody could help me out. I've included the script handling the post data which does obviously something wrong.. This is what Google says: Your server must send a 200 OK response for each HTTP POST message that Google sends to your postback

问题 EDIT 3 : FIXED ! I finally found what the problem was. Every controls where in an asp:Table, and I had to EnableViewState="true" on this table in order to be able to keep the value after postback. Thanks everyone for the answers ! First of all, excuse me if my english is not perfect but I'll try to be the most precise as possible. I'm fighting with my problem since yesterday and have been searching all over the web for an answer.. I have a form which is made to "Create a new profile". In this

问题 I am a beginner at ASP.NET and I have a problem maintaining the scroll position of the page after a partial postback of an UpdatePanel. I tried setting MaintainScrollPositionOnPostback="true" in <%@ Page Language="C#" ...%> but it didn't do the trick. Please note that I am using (and have to use) FireFox. Any help would be appreciated. Thank you! Here is my code: <asp:Content ID="BodyContent" ContentPlaceHolderID="MainContent" runat="server"> <asp:HiddenField ID="ClassificationHiddenField"

问题 How can i maintain scroll position on postback after sorting a grid table that uses MvcContrib framework? 回答1: The usual way is to use some javascript to set the current scroll position to a hidden field, then restore that position on page load (usually in a jquery ready event). However, that's really just a side effect. You should be doing some kind of ajax command to update the grid rather than a postback, then no scrolling required. 回答2: Use jQuery and client side cookie. $(function(){ var

问题 I am wondering if it is an all-or-nothing situation. What I would like to do, Load (GET) my page by normal MVC 3. Controller takes Model and passes it to View. View and Razor render it. However, when I post back, I'd like it to postback the selected info through AJAX. Is this possible? Or do I have do GET and POST with AJAX? 回答1: You can certainly POST using AJAX after GETting using other means. Here's a random question on SO that does just this: Ajax post in MVC 3 with multiple-form View The

问题 I have a GridView control on my page that I have defined a number of BoundFields for. Each row of the databound GridView has a CommandField (Select), for which I want to send the PostBack to a new page. Of course I could easily send the NewSelectedIndex in a QueryString, but I'd rather keep that information hidden from the user. Suggestions? 回答1: Leppie is right. The GridView has no PostbackUrl property. However, you can do what you want by using a standard control, which has a PostbackUrl

问题 The problem is , every time i do a postback my variable "value" doesn't keep it's previous value, and always the dictionary is empty. It doesn't have any previous saved data. How can i make it to save data ? this is the code : public partial class MyCart : System.Web.UI.Page { public Dictionary<string, string> value = new Dictionary<string, string>(); protected void Page_Load(object sender, EventArgs e) { TextBox textbox = new TextBox(); textbox.TextChanged += textbox_TextChanged; textbox.ID

问题 I have a GridView set up: <asp:GridView id="GridView1" Runat="server" AutoGenerateColumns="False" OnRowCommand = "GridView1_RowCommand" EnableViewState="true"> <Columns> <asp:TemplateField HeaderText="Delete" ItemStyle-HorizontalAlign="Center"> <ItemTemplate><asp:Button runat="server" ID="Delete" ImageUrl="~/images/Close.gif" CommandName="DeleteRow" CommandArgument="<%# CType(Container,GridViewRow).RowIndex %>"/></ItemTemplate></asp:TemplateField> <asp:TemplateField HeaderText="Comment"