add

问题 I am working with DataList in asp.net C#. I want to add strings as an item to datalist. I do this by following code: ArrayList al = new ArrayList(); for (int i = 0; i < 2; i++) { al.Add(i.toString()); } DataList2.DataSource = al; DataList2.DataBind(); But when I run the program I cannot see the numbers 0 and 1. Instead I see following picture as datalist: Where is my numbers? Does someone know any solution? Note that the task is to add to the datalist the array of string. The datalist code is

问题 I'd like to make an immutable, by-reference data type with addition a bit like this: use std::ops::Add; struct Point { x: i64, y: i64, } impl<'a> Add for &'a Point { type Output = Point; fn add(self, other: &Point) -> Point { Point { x: self.x + &other.x, y: self.y + &other.y, } } } How do I implement the Add trait for a reference to a struct? suggests implementing Add on the reference type. I can do this, where a and b are Point s: let c = &a + &b; let d = &c + &b; but not this: let d = &a +

问题 I have an empty div and in that I have another div which is draggable. Now wherever I click on the container the draggable div should be appended to (0,0) position and when clicked close button I need to remove that draggable div.How do I do that? This is what I have: http://jsfiddle.net/g6cdL/32/ Here is my code: <div id="content" style="background-color: #E5E5E5; width:500px; height:500px;"> <div class="demo" style="border-style: dashed; background-color: #CCCCCC"> Script: <script type=

问题 I am working on a asp.net mvc5 project and I want to add a font to project and I use below code but I dont get proper answer and I need a help .please help me <style type="text/css"> @font-face { font-family: 'Dense'; src: url('Dense-Regular.ttf'); } .classname { font-family: 'Dense'; } </style> and I get this error The name 'font' does not exist in the current context 回答1: <style type="text/css"> @@font-face { font-family: 'Dense'; src: url('Dense-Regular.ttf'); } .classname { font-family:

问题 We have created an application that records web camera streams using Xuggler, but video and audio are separated. We need to merge, not concatenate, these two files. How can this be done in Java? 回答1: If you have audio and video file then you can merge them to a single audio video file using FFmpeg: Download FFmpeg: http://ffmpeg.zeranoe.com/builds/ Extract downloaded file to specific folder, say c:\ffmpeffolder Using cmd move to specific folder c:\ffmpeffolder\bin Run following command: $

问题 Everytime I do git status there is this folder that appears as untracked. $ git status # On branch master # Untracked files: # (use "git add <file>..." to include in what will be committed) # # src/error/ nothing added to commit but untracked files present (use "git add" to track) Even after doing git add . , git commit -a the folder at src/error keeps showing up as untracked. Other unstaged files get commited everytime only this folder keeps giving problems. Also git doesnt report any errors

问题 Using Eclipse (Helios), I could create a JUnit test file ClassATest.java of the source file ClassA.java by using New -> JUnit Test Case -> Class under test..., then choose all the methods of ClassA to be tested. If later we add some more methods to ClassA, how do we easily reflect this addition in ClassATest ? (No copy/paste plz). 回答1: One solution is to use MoreUnit With MoreUnit installed to Eclipse, one can right click onto the newly added method (and not yet unit tested), and choose

问题 df = read.table(text = 'ID Day Count Count_sum 33021 9535 3 29 33029 9535 3 29 34001 9535 3 29 32010 9534 2 29 33023 9534 2 29 45012 9533 4 29 47001 9533 4 29 48010 9533 4 29 50001 9533 4 29 49004 9532 1 29 9002 9531 2 29 67008 9531 2 29 40011 9530 1 29 42003 9529 2 29 42011 9529 2 29 55023 9528 1 29 40012 9527 3 29 43007 9527 3 29 47011 9527 3 29 52004 9526 4 29 52005 9526 4 29 52006 9526 4 29 52007 9526 4 29 19001 9525 1 29 57008 9524 5 29 57010 9524 5 29 58006 9524 5 29 58008 9524 5 29

问题 If I have Dim a As String() = ("One,Two").Split(",") How can I add to that string ? 回答1: The easiest way is to convert it to a List and then add. Dim a As List(Of String) = ("One,Two").Split(",").ToList a.Add("Three") or if you really want to keep an array. Dim a As String() = ("One,Two").Split(",") Dim b as List(Of String) = a.ToList b.Add("Three") a=b.ToArray And here is something really outside the box: a = (String.Join(",", a) & ",Three").Split(",") 回答2: For a different approach, try: Dim

问题 Hello I need to have fields be added and taken away with plus and minus buttons. Whenever I add a field it works fine. When I enter something into a field then add another field, the previous field resets. Also, whenever I click the minus button it removes all of the fields. I want it to take one away at a time without resetting the other fields and also I keep getting a Not a Number (NaN) error whenever I click the minus button. Any help is greatly appreciated. I'll show my code below.