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OneToMany-association

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c# - 使用 SQLite-Net Extensions 和 OneToMany 关系

我在尝试为具有OneToMany关系的WindowsPhone8.1实现SQLite-Extensions示例时遇到困难。我真的很想使用这个功能,但我正在竭尽全力让它发挥作用。喜欢这个question,当我尝试使用providedexample对于具有估值列表的Stocks表:publicclassStock{[PrimaryKey,AutoIncrement]publicintId{get;set;}[MaxLength(8)]publicstringSymbol{get;set;}[OneToMany(CascadeOperations=CascadeOperation.All)]

c# - 使用 SQLite-Net Extensions 和 OneToMany 关系

我在尝试为具有OneToMany关系的WindowsPhone8.1实现SQLite-Extensions示例时遇到困难。我真的很想使用这个功能,但我正在竭尽全力让它发挥作用。喜欢这个question,当我尝试使用providedexample对于具有估值列表的Stocks表:publicclassStock{[PrimaryKey,AutoIncrement]publicintId{get;set;}[MaxLength(8)]publicstringSymbol{get;set;}[OneToMany(CascadeOperations=CascadeOperation.All)]

c# - 错误 'there is already an open datareader associated with this command which must be closed first'

运行时错误“已经有一个与此命令关联的打开的数据读取器必须先关闭”objCommand=newSqlCommand("SELECTfield1,field2FROMsourcetable",objConn);objDataReader=objCommand.ExecuteReader();while(objDataReader.Read()){objInsertCommand=newSqlCommand("INSERTINTOtablename(field1,field2)VALUES(3,'"+objDataReader[0]+"')",objConn);objInsertComman

c# - 错误 'there is already an open datareader associated with this command which must be closed first'

运行时错误“已经有一个与此命令关联的打开的数据读取器必须先关闭”objCommand=newSqlCommand("SELECTfield1,field2FROMsourcetable",objConn);objDataReader=objCommand.ExecuteReader();while(objDataReader.Read()){objInsertCommand=newSqlCommand("INSERTINTOtablename(field1,field2)VALUES(3,'"+objDataReader[0]+"')",objConn);objInsertComman

This XML file does not appear to have any style information associated with it. The document tree is

PS:今天学习调试WebAPI项目,发现浏览器会返回以下说明,因此做一个笔记浏览器返回结果:ThisXMLfiledoesnotappeartohaveanystyleinformationassociatedwithit.Thedocumenttreeisshownbelow.valueAPIDemo:总结:报这个信息其实是因为返回的string不是XML可解析供浏览器渲染的。XML文件可以关联一个XSLT文件,用于渲染显示出来的内容。XSLT全称是EXtensibleStylesheetLanguage,它的作用是把XML文件中的数据用直观的方式显示给用户看,XSLT和XML的关系类似MV

c# - 使用 2 个不同的命令时出现错误 "There is already an open DataReader associated with this Command which must be closed first"

我有这个遗留代码:privatevoidconecta(){if(conexao.State==ConnectionState.Closed)conexao.Open();}publicListget_dados_historico_verificacao_email_WEB(stringemail){Listhistoricos=newList();conecta();sql=@"SELECT*FROMhistorico_verificacao_emailWHEREnm_email='"+email+@"'ORDERBYdt_verificacao_emailDESC,hr_veri

c# - 使用 2 个不同的命令时出现错误 "There is already an open DataReader associated with this Command which must be closed first"

我有这个遗留代码:privatevoidconecta(){if(conexao.State==ConnectionState.Closed)conexao.Open();}publicListget_dados_historico_verificacao_email_WEB(stringemail){Listhistoricos=newList();conecta();sql=@"SELECT*FROMhistorico_verificacao_emailWHEREnm_email='"+email+@"'ORDERBYdt_verificacao_emailDESC,hr_veri

Workspace associated with branch ‘XXX‘ has been restored

Workspaceassociatedwithbranch‘XXX’hasbeenrestored在Idea使用git切换分支时,右下角会提示信息:Workspaceassociatedwithbranch‘XXX’hasbeenrestored(已还原与分支“XXX”关联的工作区)Idea在切换分支时会自动还原此分支的工作区,即还原原先在该分支上开发时打开的文件、当时的运行配置和断点。选择Rollback可以不还原此分支的工作区。

戈朗 : optimal way of typing associative slices?

我正在解析大量HTTP日志,目的是了解每个IP地址生成了多少请求。我做的第一件事是:varhits=make(map[string]uint)//soIcouldpopulateitwithhits[ipAddr]++但是,我想让它“类型化”,以便立即清楚hits[string]uint使用IP地址作为字符串标识符。我想,也许一个结构可以帮助我:typeHitstruct{IPstringCountuint}但那样(我认为)我正在失去性能,因为现在我如何真正寻找特定的命中来增加它的计数。我容忍我在这里可能会偏执,并且可以简单地进行循环:varhits=make([]Hit)//Trac

戈朗 : optimal way of typing associative slices?

我正在解析大量HTTP日志,目的是了解每个IP地址生成了多少请求。我做的第一件事是:varhits=make(map[string]uint)//soIcouldpopulateitwithhits[ipAddr]++但是,我想让它“类型化”,以便立即清楚hits[string]uint使用IP地址作为字符串标识符。我想,也许一个结构可以帮助我:typeHitstruct{IPstringCountuint}但那样(我认为)我正在失去性能,因为现在我如何真正寻找特定的命中来增加它的计数。我容忍我在这里可能会偏执,并且可以简单地进行循环:varhits=make([]Hit)//Trac