row

问题 I am creating a program to work like Microsoft Excel , in JAVA. My problem is how do I put the row numbers beside each row of the JTable ? I have seen it working in other Java Programs - I just can not figure out how to include it in mine. Google gave me this website, and apparently it works. When I use it in my program this nothing happen. :/ I there a better way of adding row numbers in a JTable ? I have looked at the Java Tutorials already. I am sorry if this question has been asked before

问题 I have looked around and have yet to find a decent answer. I wish to add a new row into my grid from my own custom button, without using their add buttom or edit forms. Something like: $("#grid").jqGrid('insert',{"id","col1","col2"}); I want to be able to programatically insert new rows and not have to use their form. Any help would be greatly appreciated. Regards, Byron 回答1: Why do you not use addRowData method (see http://www.trirand.com/jqgridwiki/doku.php?id=wiki:methods)? Do you want do

问题 I am working on a simple task: Reading an Excel file and converting it to an object. Though, I am facing a problem in reading the Excel file (.xls) I will receive it from an external system (maybe they autogenerated it). If I open it and just do a simple save (with or without changing anything in the Excel file), my parser logic works fine. But if I don't edit and save the file and try to parse the original file as is, I get an exception at this line while loading the .xls file: HSSFWorkbook

问题 I have an external 3rd party program export the database to mysql in real time, and I want to show data for reporting. So, I can't change the structure, because it's being sync in real time. The table structure is something like this ID | Date | Transaction ----------------------------- 12 | 2012-11-01 | 200 12 | 2012-11-02 | 250 12 | 2012-11-03 | 150 12 | 2012-11-04 | 1000 12 | 2012-11-05 | 225 .... 13 | 2012-11-01 | 175 13 | 2012-11-02 | 20 13 | 2012-11-03 | 50 13 | 2012-11-04 | 100 13 |

问题 Suppose we have a dataframe or matrix with one column specifying an integer value N as below (col 5). Is there a vector approach to repopulate the object such that each row gets copied N times? > y [,1] [,2] [,3] [,4] [,5] [1,] -0.02738267 0.5170621 -0.01644855 0.48830663 1 [2,] -0.30076544 1.8136359 0.02319640 -1.59649330 2 [3,] 1.73447245 0.4043638 -0.29112385 -0.25102988 3 [4,] 0.01025271 -0.4908636 0.80857300 0.08137033 4 The result would be as follows. [1,] -0.02738267 0.5170621 -0

问题 Ext.onReady(function() { Ext.define('User', { extend: 'Ext.data.Model', fields: [ 'name', 'class', 'view', 'edit', 'delete'] }); var userStore = Ext.create('Ext.data.Store', { model: 'User', data: [ { name: 'Sri Vidhya', class: '6 A'}, { name: 'Rafla', class: '9 C'}, { name: 'Fabin', class: '10 B'}, { name: 'Jayanthi', class: '8 C'}, { name: 'Sri Vidhya', class: '6 A'}, { name: 'Rafla', class: '9 C'}, { name: 'Fabin', class: '10 B'}, { name: 'Jayanthi', class: '8 C'}, { name: 'Sri Vidhya',

问题 I want to use data caching on my .net C# application. So far I added data caching and added sql cache dependencies on specific tables. But thats not good enough. These tables will be updated too frequently but not relevant to a lot of the cached objects. This will make the data caching almost useless because it will be flushed to frequently. I want to implement sql cache dependency on specific rows for each object. How can I do that? 回答1: You need to understand how SqlDependency works. You

问题 The Blueprint CSS framework makes all table rows of alternating colors by default. How to disable this behaviour for one table? I tried to use Chrome Developer Tools to see all the styles Chrome uses for a defined table, but did not find the style which would set the colors for rows. I also searched the Internet and did not find a solution. It's like magic... Anyone can help me out? 回答1: You need a more specific selector to override... BP is pretty general though so that shouldnt be an issue

问题 I have a powershell script that opens an excel file, re-assigns a blank password, and then saves the file. I want to add a task to the script to remove the first 4 rows of the excel file before saving it. 回答1: You can't use OleDB for deleting data from Excel document. As per MSDN docmentation: Although the Jet OLE DB Provider allows you to insert and update records in an Excel workbook, it does not allow DELETE operation What you can do is use Exel's COM interface to delete rows. Remember to

问题 I found this solution for selecting a random row from a table in Oracle. Actually sorting rows in a random manner, but you can fetch only the first row for a random result. SELECT * FROM table ORDER BY dbms_random.value; I just don't understand how it works. After ORDER BY it should be a column used for sorting. I see that "dbms_random.value" returns a value lower than zero. This behavior can be explained or is just like that? Thanks 回答1: you could also think of it like this: SELECT col1,