针对错误信息 "invalid attempt to access a field before calling read()",我们可以从以下几个方面进行分析和解决: 1. 理解错误信息 错误信息 "invalid attempt to access a field before calling read()" 指出在尝试访问某个对象或数据结构的字段之前,没有先调用该对象的 read() 方法或执行相应的读取操作。这...
UPDATE :Re: invalid attempt to access a field before calling Read()Posted by: Dotun Ogunsulire Date: July 09, 2007 06:57AM Hi All I've finally got my code apparently executing however, the way I got it to work included removing a condition from my SQL query Also, it appears ...
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond A page can have only one server-side Form tag.-- What is the error ? A potentially dangerous Request.Form valu...
Bug #9668 Invalid attempt to access a field before calling Read() Submitted: 6 Apr 2005 5:11Modified: 17 Aug 2005 12:43 Reporter: Nathan Lewis Email Updates: Status: Duplicate Impact on me: None Category: Connector / NETSeverity: S2 (Serious) Version: 1.0.4OS: Windows (Windows XP)...
connection.Close(); connection.Open(); cmd = new MySqlCommand("select attend from credit_purchase where date='" + date + "'", connection); dread = cmd.ExecuteReader(); while (dread.Read()) { x = d...
this.PrintAge(); //INVALID} Accordingly, as with theattempttoaccessthe non-static field of a static method using the keyword this, the compiler displays the following error message and fails to compile our class: ParaCrawl Corpus The 502 (Bad Gateway) status code indicates that the server, ...
错误检查 0x4:INVALID_DATA_ACCESS_TRAP 错误检查 0x5:INVALID_PROCESS_ATTACH_ATTEMPT 错误检查 0x6:INVALID_PROCESS_DETACH_ATTEMPT 错误检查 0x7:INVALID_SOFTWARE_INTERRUPT 错误检查 0x8:IRQL_NOT_DISPATCH_LEVEL 错误检查 0x9:IRQL_NOT_GREATER_OR_EQUAL 错误检查 0xA:IRQL_NOT_LESS_OR_EQUAL 错误检查 ...
A module was not loaded. var errSecMultiplePrivKeys: OSStatus An attempt was made to import multiple private keys. var errSecMultipleValuesUnsupported: OSStatus Multiple values are not supported. var errSecNoAccessForItem: OSStatus The specified item has no access control. var errSecNoBasicConstr...
DTS_E_EXPREVALINVALIDTOKEN Field Reference Feedback DefinitionNamespace: Microsoft.SqlServer.Dts Assembly: Microsoft.SqlServer.DtsMsg.dll MessageId: DTS_E_EXPREVALINVALIDTOKEN MessageText: Attempt to parse the expression "%1!s!" failed. The token "%2!s!" at line number "%3!s!", ...
System.Configuration.Provider.ProviderException: An exception occurred. Please check the Event Log. ---> MySql.Data.MySqlClient.MySqlException: Invalid attempt to access a field before calling Read() at MySql.Data.MySqlClient.ResultSet.get_Item(Int32 index) ...