asp.netでサーバーエラーが発生しましたか？

Question

このエラーの意味は何ですか？ INSERTステートメントがFOREIGN KEY制約 "FK__thumbnail__instr__160F4887"と競合しました。競合はデータベース "MusicStoreDB"、テーブル "dbo.instrumentItem"、列 'instrumentId'で発生しました。 ステートメントが終了しました。ここで

は、スタックトレースです：

Server Error in '/' Application. 

The INSERT statement conflicted with the FOREIGN KEY constraint 
"FK__thumbnail__instr__160F4887". The conflict occurred in database 
"MusicStoreDB", table "dbo.instrumentItem", column 'instrumentId'. 
The statement has been terminated. 

Description: An unhandled exception occurred during the execution of the 
current web request. Please review the stack trace for more information 
about the error and where it originated in the code. 

Exception Details: System.Data.SqlClient.SqlException: The INSERT statement 
conflicted with the FOREIGN KEY constraint "FK__thumbnail__instr__160F4887". 
The conflict occurred in database "MusicStoreDB", table 
"dbo.instrumentItem", column 'instrumentId'. 
The statement has been terminated. 

Source Error: 


Line 74: 
Line 75:    obj.thumbnailImages.Add(subImg); 
Line 76:    obj.SaveChanges(); 
Line 77:   } 
Line 78:  } 

Source File: c:\Users\User1\Documents\Visual Studio 
2015\WebSites\MusicStore\App_Code\ConnectionClassGuitarItems.cs Line: 76 

Stack Trace: 


[SqlException (0x80131904): The INSERT statement conflicted with the FOREIGN 
KEY constraint "FK__thumbnail__instr__160F4887". The conflict occurred in 
database "MusicStoreDB", table "dbo.instrumentItem", column 'instrumentId'. 
The statement has been terminated.] 
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean 
breakConnection, Action`1 wrapCloseInAction) +2434922 
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, 
Boolean breakConnection, Action`1 wrapCloseInAction) +5736592 

System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning 
(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean 
asyncClose) +285 
System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, 
SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet 
bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +3731 
System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +58 
System.Data.SqlClient.SqlDataReader.get_MetaData() +89 
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, 
RunBehavior runBehavior, String resetOptionsString) +379 
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior 
cmdBehavior, RunBehavior runBehavior, Boolean returnStream, 
Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, SqlDataReader 
ds, Boolean describeParameterEncryptionRequest) +2026 
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior 
cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, 
TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean 
asyncWrite) +375 
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior 
cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) 
+53 
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, 
String method) +240 
System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior 
behavior) +41 
System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +12 
System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher. 
<Reader>b__c(DbCommand t, DbCommandInterceptionContext`1 c) +9 

System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1 
.Dispatch(TTarget target, Func`3 operation, TInterceptionContext 
interceptionContext, Action`3 executing, Action`3 executed) +72 

System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher 
.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext) 
+355 
System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader 
(CommandBehavior behavior) +167 
System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +12 

System.Data.Entity.Core.Mapping.Update.Internal.DynamicUpdateCommand. 
Execute(Dictionary`2 identifierValues, List`1 generatedValues) +234 
System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() 
+139 

[UpdateException: An error occurred while updating the entries. 
See the inner exception for details.] 
System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() 
+319 
System.Data.Entity.Core.EntityClient.Internal.EntityAdapter. 
<Update>b__2(UpdateTranslator ut) +9 
System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update(T 
noChangesResult, Func`2 updateFunction) +120 
System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update() +77 
System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__35() 
+11 
System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 
func, IDbExecutionStrategy executionStrategy, Boolean 
startLocalTransaction, Boolean releaseConnectionOnSuccess) +288 
System.Data.Entity.Core.Objects.ObjectContext.SaveChangesToStore(SaveOptions 
options, IDbExecutionStrategy executionStrategy, Boolean 
startLocalTransaction) +163 
System.Data.Entity.Core.Objects.<>c__DisplayClass2a. 
<SaveChangesInternal>b__27() +22 
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 
operation) +164 

System.Data.Entity.Core.Objects.ObjectContext. 
SaveChangesInternal(SaveOptions options, Boolean 
executeInExistingTransaction) +222 
System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions 
options) +7 
System.Data.Entity.Internal.InternalContext.SaveChanges() +114 

[DbUpdateException: An error occurred while updating the entries. See the 
inner exception for details.] 
System.Data.Entity.Internal.InternalContext.SaveChanges() +199 
System.Data.Entity.Internal.LazyInternalContext.SaveChanges() +27 
System.Data.Entity.DbContext.SaveChanges() +20 
ConnectionClassGuitarItems.AddThumnailImage(thumbnailImage subImg) in 
c:\Users\User1\Documents\Visual Studio 
2015\WebSites\MusicStore\App_Code\ConnectionClassGuitarItems.cs:76 
Pages_CreateBrands.itemSaveButton_Click(Object sender, EventArgs e) in 
c:\Users\User1\Documents\Visual Studio 
2015\WebSites\MusicStore\Pages\CreateBrands.aspx.cs:231 
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9696694 
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) 
+204 

System.Web.UI.WebControls.Button.System.Web.UI. 
IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +12 
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, 
String eventArgument) +15 
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35 
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, 
Boolean includeStagesAfterAsyncPoint) +1639 

Answer 1

それはあなたがinstrumentItemテーブルに行を挿入しようとしているとあなたがinstrumentId列に割り当てる値は、無効であることを意味しています。このテーブルとデータベース内の別のテーブルとの間に外部キー関係があり、instrumentIdの値が別のテーブルに存在するはずですが、それはありません。