binding

问题 I'm a newbie with Spring Framework. I'm doing a tutorial about Spring 3 MVC and I get an exception when run web. Exception : java.lang.IllegalStateException: Neither BindingResult nor plain target object for bean name 'contact1' available as request attribute org.springframework.web.servlet.support.BindStatus.<init>(BindStatus.java:141) org.springframework.web.servlet.tags.form.AbstractDataBoundFormElementTag.getBindStatus(AbstractDataBoundFormElementTag.java:174) org.springframework.web

问题 I just followed this to create a simple Chart Plotter using MVVM. But I am unable to bind the data-source Output image. XAML <Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:GrayPlotter" xmlns:d3="http://research.microsoft.com/DynamicDataDisplay/1.0" x:Class

问题 I've been able to bind a list of objects correctly. Works fine. Now when I change the item a complex object it stops working. The complex object is the room name with the list of objects. When the 'postback' the name returns fine, but the list of objects comes back as null. Any hints please? Room Model: public class Room { public string Name { get; set; } public List<Option> Options { get; set; } public Room() { } public Room(string name, List<Option> options) { Name = name; Options = options

问题 I have a WPF application with two pages. On page one, there is a TextBox (boxSource). On page two, I have a TextBlock (blockDestination). I want to databind in XAML, the Text property of boxSource to the Text property of blockDestination. I set the DataContext of page two to page one when the application is initialized. I setup blockDestination as follows: <TextBlock Name="blockDestination" Grid.Row="0" Grid.Column="1" Text="{Binding boxSource, Path=Text, Mode=OneWay}" /> This does not pickup

问题 I have a jquery script, where if you mouseenter and element, something shows, and disappears when you mouseleave. I'm trying to unbind the mouseleave when user clicks, so that "something" stays showing when user leaves. Is this the correct way to do it? If so, can someone help me get this script to work? Thank you! $('.block').live("mouseenter",function(){ var id= $(this).attr('id'); $('#arrowPreview'+id).show(); }).live("mouseleave",function(){ var id= $(this).attr('id'); $('#arrowPreview'

问题 **Edit Hello Everyone I am tryng to include an SQL statement in to my vba so that I can easily sort through data and filter. So I have found way to include SQL in to my VBA but I get an error that says "The RunSQL action requires a SQL statement" but clearly the SQL statement is within the strSQL variable. Private Sub buttonNot_Click() Dim strSQL As String strSQL = "SELECT Table1.[FirstNam], Table1.[LastNam]" & _ "FROM Table1 " & _ "WHERE ((([FirstNam]) <> 'Jamie') AND (([LastNam]) <>

问题 I want to count different states in the Tableview and display it in Labels. Is there a way to achieve this functionality without iterating over the whole list every time a value changes? Is there a way to bind the amount of the different states to a label? Currently I'm doing this with iterating over the List: private void updateLbl(){ int on = 0, off = 0, un = 0; for(StringContainer wps : streamLinkList){ if(wps.getState().equals("online")){ on++; } else if(wps.getState().equals("offline")){

问题 The code looks like this: Sensor Class: @Entity @Table(name = "sensor") public class Sensor { @Id @Column(name = "id") @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id; @ManyToOne private SensorType sensorType; @NotEmpty @Size(min = 3, max = 255) @Column(name = "name") private String name; ...... } SensorType: @Entity @Table(name = "sensortype") public class SensorType { @Id @Column(name = "id") @GeneratedValue(strategy = GenerationType.IDENTITY) private Integer id;

问题 This is probably a silly question, but I can't make a simple example with ItemsSource work. My XAML: <Window x:Class="TestDataGrid.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:TestDataGrid" mc:Ignorable="d" Height="250" Width="300" Name="MyWindow">

问题 I have to work on a project in which I have to convert a binary file into a custom file format, which requires splitting the file adding some data to it and then repacking it into the new file. For Example I have a file of 1 MB and I have to split it into chunks of fixed length and then adding some data as a header to it. After that the entire file will be repackaged into a new file. Please any help will be appreciated. 回答1: First you use a DataInputStream to read chunks of x bytes into