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, "getalluser", null) {return reader ;}} among them, getalluser is a stored procedure that queries all users without parameters, and binds the data source through the returned reader.This error occurs because the reader has been disabled before reading the reader (the reason for using ). Therefore, if the data cannot be read, the error will be reported. Therefore, modify the call method:Public sqldatareader getreader () {try {sqldatareader reader = sq
Error phenomena:Error message: The index is out of range. Must be non-negative and less than the collection size.Parameter name: Index (development environment: VS2010, Tri-party control DotNetBar)Generally in the program development process of the above errors, generally in the program interface is no way to catch the exception, but it is not such a
Part of the site with Phpcms kernel, may have encountered some customers can register, some customers to register after the show 0, other nothing, Baidu a large circle, are said to be JS problem. Just the ant brother also met. Distressed for a long time.In fact, the reason is very simple, in order to eliminate the law, we have to register the time to return the 0 have changed, so that they return a differen
Recently, it is found that when the company's background system uses Firefox to operate news through RSS, the page is normal, but when IE7 or 6 is used, information is garbled during News browsing. After checking, it is found that the value
SpringBoot + Vue is separated from the frontend and backend, and SpringSecurity is used to solve the permission problem perfectly, Currently, when the backend is separated, the handling of permission issues is slightly different from our traditional processing methods. I am
When the execute dialog box is opened and saved, the memory read error is inexplicably reported. Which of the following heroes can solve this problem? Thanks very much for the development and application of the VCL component. Http://www.delphi2007.net/DelphiVCL/html/delphi_20061225115259132.html When the execute dialog box is
Problem tracking: Image Display is incomplete after the scaling animation ScaleAnimation is executed in ImageView ., Problem: I have a ScrollView nested with a vertical LinearLayout. Then, this LinearLayout contains multiple ImageView controls to display their own images respectively. Then I created a scaled-up ScaleAn
The size of mysql20W data is 1 GB and the like is very slow. how can this problem be solved. $ SQL = SELECT * 'FROM 'text' where 'title' LIKE' % bbd % 'limit0, 10 nbsp; $ SQL = mysql_query ($ SQL ); in this case, if we want to calculate the size of 20 W li mysql data in 1 GB within 1 second, we can use like to solve this pro
1. First, open the IIS manager. Check the applicationProgramPool, "defaultapppool" error. And it is not a normal stop icon. 2. Restart the "defaultapppool" application pool and close it immediately after you browse the page. 3. It is time to view the event log. The following types of logs are found: Event Type: WarningEvent Source: w3svcEvent Type: NoneEvent ID: 1009Date:Event: 16:12:33User: N/COMPUTE
This article is on the wamp start port 80 is occupied problem (win7 system WAMP80 port is occupied by the Microsoft-HTTPAPI2.0 solution) a detailed analysis of the introduction, need a friend reference The problem is as follows:
Windows Update is being configured when Windows 7 is turned on. How can this problem be solved? It is estimated that all computer users in WIN7 have encountered a situation where "Windows Update is being configured, please do not shut down" on the boot screen. Generally, it
When the online editor is moved to the server, the problem is not displayed. the local test is good, but it is not displayed after it is migrated to the server. why? Reply to discussion (solution)
Http://blog.csdn.net/jackeyabc/archive/2007/04/11/1561117.aspx Http://topic.csdn.net/u/20070316/14/6A6D551E-1C7B-4A9E-A2AC-64E15E501AD3.html There is a textarea on the page (note that there are multiple rows). Now we need to use js to implement the following functions. 1. You can only enter characters of a certain byte. For example, if the maximum length is 10, you can only enter 10 letters or 5 Chinese c
Thinkphp3.1 put it on IIS and garbled characters appear. apache is normal. what is the problem? Thinkphp3.1 put it on IIS and garbled characters appear. apache is normal. what is the problem? Don't say the encoding
When a PHP website is registered, how does one solve the problem of simulating POST requests to send text messages through the SMS interface? When a PHP website is registered, how does one solve the problem of simulating POST requests to send text messages through the SMS interface? Reply content: When a PHP website
After a website is built, two templates are switched, but there is a cache and the effect cannot be viewed immediately. you need to re-register the website. how can this problem be solved for a website and two templates are switched, however, if there is a cache, you cannot view the effect immediately. you need to re-r
Apache is running normally and iis prompts error 500. what is the problem? Include ('Conn/conn. php '); Var_dump ($ mysqli ); $ SQL = "select * from user where username =? And password =? And var_zhibu =? "; $ Stmt = $ mysqli-> prepare ($ SQL ); $ Stmt-> bind_param ("sss", $ username, $ password, $ var_zhibu ); Var_dump ($ stmt ); $ Username = @ $ _ POST ['userna
After the virtual machine is installed with redflad5.0, a problem is displayed. If you cannot log on, please refer to general Linux technology-Linux technology and application information. The following is a detailed description. I used Microsoft Virtual PC to install red flad 5.0. After the system
After further research, we have modified the big bug that the program crashes when there is no network connection, if the program is open, no network connection will eject the network connection failed.dialog box, if a network exception occurs during the program running, the network connection exception will be thrown when the server is needed;The second
Requirement: The program prepares several QR codes for the public account. The total amount is RMB. scan the QR codes to receive the QR codes. each QR code must receive a red envelope. you cannot receive the QR codes again after receiving the QR codes, this is different from the normal scanning code to send a red envelope advertisement. there is only one QR code,
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