cursor | 易学教程

How to loop through a table using a cursor in MySQL?

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在textarea中插入图片的办法(转载)

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原文地址： http://www.cnxinhua.com/html/17688.html 最近一个客户要求这个功能----在textarea中插入图片，用来模仿UBB代码，但又不同于UBB，原因是UBB点击某个图片的时候，在textarea中插入的是一些特殊的字符，而他要求的是将图片插入到textarea中。太难实现了，原因是textarea中只允许插入文字，不允许插入图片，找了很长时间，最终还是没有找到，最后只能改用其他方法模拟。找了很久，找到div有一个属性 contenteditable，当这个属性为true时，此层可编辑；当这个属性为false时，层不可编辑。当层可编辑的时候，就像textarea了，但是，当输入的文字的行数多的时候，层会自动加高，这样给这个层加上 overflow:auto;属性就可以了。以下是我的代码，与大家共享 index.html <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>利用层模拟在textarea表单中插入图片</title> <script language="javascript" type="text/javascript"> var pos; function getPos() { pos = document

Convert results of SQLite Cursor to my object

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问题 I've executed some queries on my SQLite DB on Android. Main instruction used is this: Cursor cursor = myDB.rawQuery(select, null); Now I want the results of this query to be converted to a generic class I've created in the project. If you think I want an ORM system, you are right, but all I've found now are ORM systems that want to query the DB, save objects in the DB and manage the DB itself. Instead now I need a 'simple' ORM feature that can do exactly what the google.gson library does with

Insert text in Javascript contenteditable div

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问题 I have a problem where I need to insert a text (string, may or may not have html tags) to a div. It has to be a div and not a textarea. Is there anyway to do that? First of all, I need to get the cursor position, then inserting the text in that position. It's similar to function insertAdjacentText, but it can only insert before or after a tag, and only works in IE. Refer to this URL: http://yart.com.au/test/iframe.aspx. Note how you can position the cursor in the div, we need to add text at

Python - MySQL 数据库连接 - PyMySQL 驱动 - 第二十五天

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序言本文我们为大家介绍 Python3 使用 PyMySQL 连接数据库，并实现简单的增删改查。什么是 PyMySQL？ PyMySQL 是在 Python3.x 版本中用于连接 MySQL 服务器的一个库，Python2中则使用mysqldb。 PyMySQL 遵循 Python 数据库 API v2.0 规范，并包含了 pure-Python MySQL 客户端库。 PyMySQL 安装在使用 PyMySQL 之前，我们需要确保 PyMySQL 已安装。 PyMySQL 下载地址：https://github.com/PyMySQL/PyMySQL。如果还未安装，我们可以使用以下命令安装最新版的 PyMySQL： pip install pymysql 数据库连接连接数据库前，请先确认以下事项：您已经创建了数据库 TESTDB. 在TESTDB数据库中您已经创建了表 EMPLOYEE EMPLOYEE表字段为 FIRST_NAME, LAST_NAME, AGE, SEX 和 INCOME。连接数据库TESTDB使用的用户名为 "testuser" ，密码为 "test123",你也可以自己设定或者直接使用root用户名及其密码，Mysql数据库用户授权请使用Grant命令。在你的机子上已经安装了 Python MySQLdb 模块。实例： import

android.database.CursorWindowAllocationException: Cursor window allocation of 2048 kb failed even after closing cursor

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问题 There are many questions on SO about CursorWindowAllocatoinException: SQLite Android Database Cursor window allocation of 2048 kb failed Could not allocate CursorWindow Out of Memory when allocating cursors Android SQLite CursorWindowAllocationException crash All of them suggest that cursor must be closed after use. But that did not resolve my problem. Here is my code: String query = "select serial from tbl1 union select serial from tbl2 union select serial from tbl3"; SQLiteDatabase db =

Invalid cursor state, SQL state 24000 in SQLExecDirect

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I need to call two stored procedures in sequence via ODBC in PHP: #run stored procedure 1 $query = "Shipped_Not_Shipped_Rep ".$_GET['rep_id']; $result = odbc_exec($dbh, $query); odbc_result_all($result); #run stored procedure 2 $query = "Shipped_Not_Shipped_Account ".$_GET['account_id']; $result = odbc_exec($dbh, $query); odbc_result_all($result); I'm getting this error in PHP after the second stored procedure call: Warning: odbc_exec() [function.odbc-exec]: SQL error: [unixODBC][FreeTDS][SQL Server]Invalid cursor state, SQL state 24000 in SQLExecDirect If I re-arrange the order I call the

Passing a Cursor between processes (Parcelable Cursor)

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I need to pass a Cursor ( SQLiteCursor ) from a service to an application on API 10 , and having hard time finding a decent (and fast) solution. I've seen the CursorWindow class. This is Parcelable but I can't instantiate this class on API 10 to use SQLiteCursor.fillWindow() because it has no valid constructors. CursorWindow(boolean) is deprecated. And even if I got a CursorWindow instance with data from a SQLiteCursor , how do I copy this window into a new Cursor ? What Cursor implementation should I use for this? I see no usable Cursor that extends AbstractWindowedCursor . Thanks for your

Add the contents of one Cursor to another Cursor

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I want to join two cursors so that the contents of the second Cursor shall also appear in first Cursor after joining. Precisely here is my code, public final Uri AllImage_URI_Int = MediaStore.Images.Media.INTERNAL_CONTENT_URI; public final Uri AllAudio_URI = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; cContentList = managedQuery(AllImage_URI_Int, null, null, null, MediaStore.Images.ImageColumns.TITLE); cList_Int = managedQuery(AllImage_URI, null, null, null, MediaStore.Images.ImageColumns.TITLE); Should i use the CursorJoiner in this case? I want to pass this Cursor to SimpleListAdapter? How

How can I find the cursor location (X/Y, not line/column) in an HTML textarea? [duplicate]

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问题 This question already has answers here : How do I get the (x, y) pixel coordinates of the caret in text boxes? (3 answers) Closed 5 years ago . I'd like to display a dropdown list in a <textarea> to assist the user in typing certain things. You know this from current IDEs as code completion. As you start typing something, a popup will appear right a the current cursor/caret location and you can navigate it using arrow keys to complete your text input. I know how to get the cursor position in

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