尝试通过前端创建新记录未正确保存到数据库
因此，我从自定义代码恢复为创建页面时自动生成的代码，主要要点是我希望SSColID值在创建时为null。调试时，tableMap中的obj值正确（SSColID也为null）。我一直遇到DbUpdateConcurrency异常。 （数据库表（SSMaps）已建立，所有字段都允许NULL。如果还有其他需要，请告诉我。
// This is the snippet in the beginning of control for the db
private APP_configs db = new APP_configs();
// the object inside the Config class being used
public System.Data.Entity.DbSet<APP_admin_v2.Models.SmartsheetMap> SmartsheetMaps { get; set; }
// Create
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "KeyID,SheetName,SheetID,SSCol,VPCol,VPTable,SSColID")] SSMap tableMap)
{
if (ModelState.IsValid)
{
db.SmartsheetMaps.Add(tableMap);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(tableMap);
}
// Model Class
[Table("SSMaps")]
public partial class SSMap
{
[StringLength(255, MinimumLength = 1, ErrorMessage = "Required Field - Sheet Name")]
[Display(Name = "Sheet Name")]
public string SheetName { get; set; }
[StringLength(255, MinimumLength = 1, ErrorMessage = "Required Field - Sheet ID")]
[Display(Name = "Sheet ID")]
public string SheetID { get; set; }
[StringLength(255, MinimumLength = 1, ErrorMessage = "Required Field - SS Column Name must match exactly and is Case/Space Sensitive")]
[Display(Name = "Smartsheet Column Name")]
public string SSCol { get; set; }
[StringLength(255, MinimumLength = 1, ErrorMessage = "Required Field - VP Column Name must match exactly and is Case/Space Sensitive")]
[Display(Name = "Viewpoint Column Name")]
public string VPCol { get; set; }
[StringLength(255, MinimumLength = 1, ErrorMessage = "Required Field - VP Table Name must match exactly and is Case/Space Sensitive")]
[Display(Name = "Viewpoint Table Name")]
public string VPTable { get; set; }
[Display(Name = "SS Column ID")]
public string SSColID { get; set; }
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public long KeyID { get; set; }
}
// Snippet from create page (wanting the initial creation value to be null
<div class="form-group">
@Html.LabelFor(model => model.SSColID, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.DisplayFor(model => model.SSColID)
</div>
</div>
// Additional Error Code Throw
[OptimisticConcurrencyException: Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. See http://go.microsoft.com/fwlink/?LinkId=472540 for information on understanding and handling optimistic concurrency exceptions.]
System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.ValidateRowsAffected(Int64 rowsAffected, UpdateCommand source) +5628032
System.Data.Entity.Core.Mapping.Update.Internal.UpdateTranslator.Update() +334
System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.<Update>b__2(UpdateTranslator ut) +11
System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update(T noChangesResult, Func`2 updateFunction) +132
System.Data.Entity.Core.EntityClient.Internal.EntityAdapter.Update() +106
System.Data.Entity.Core.Objects.ObjectContext.<SaveChangesToStore>b__35() +13
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) +157
System.Data.Entity.Core.Objects.<>c__DisplayClass2a.<SaveChangesInternal>b__27() +25
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +162
System.Data.Entity.Core.Objects.ObjectContext.SaveChangesInternal(SaveOptions options, Boolean executeInExistingTransaction) +221
System.Data.Entity.Core.Objects.ObjectContext.SaveChanges(SaveOptions options) +11
System.Data.Entity.Internal.InternalContext.SaveChanges() +113
[DbUpdateConcurrencyException: Store update, insert, or delete statement affected an unexpected number of rows (0). Entities may have been modified or deleted since entities were loaded. See http://go.microsoft.com/fwlink/?LinkId=472540 for information on understanding and handling optimistic concurrency exceptions.]
System.Data.Entity.Internal.InternalContext.SaveChanges() +191
System.Data.Entity.Internal.LazyInternalContext.SaveChanges() +27
System.Data.Entity.DbContext.SaveChanges() +22
<APP>.Controllers.SmartsheetMapController.Create(SmartsheetMap smartsheetMap) in C:\Users\ad\Desktop\<APP>\<APP>_admin_v2\Controllers\SmartsheetMapsController.cs:85
lambda_method(Closure , ControllerBase , Object[] ) +103
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +157
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.Async.<>c.<BeginInvokeSynchronousActionMethod>b__9_0(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__11_0() +50
System.Web.Mvc.Async.<>c__DisplayClass11_1.<InvokeActionMethodFilterAsynchronouslyRecursive>b__2() +228
System.Web.Mvc.Async.<>c__DisplayClass7_0.<BeginInvokeActionMethodWithFilters>b__1(IAsyncResult asyncResult) +10
System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.<>c__DisplayClass3_6.<BeginInvokeAction>b__3() +35
System.Web.Mvc.Async.<>c__DisplayClass3_1.<BeginInvokeAction>b__5(IAsyncResult asyncResult) +100
System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
System.Web.Mvc.<>c.<BeginExecuteCore>b__152_1(IAsyncResult asyncResult, ExecuteCoreState innerState) +11
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +45
System.Web.Mvc.<>c.<BeginExecute>b__151_2(IAsyncResult asyncResult, Controller controller) +13
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
System.Web.Mvc.<>c.<BeginProcessRequest>b__20_1(IAsyncResult asyncResult, ProcessRequestState innerState) +28
System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9874041
System.Web.<>c__DisplayClass285_0.<ExecuteStepImpl>b__0() +26
System.Web.StepInvoker.Invoke(Action executionStep) +101
System.Web.<>c__DisplayClass4_0.<Invoke>b__0() +22
Microsoft.AspNet.TelemetryCorrelation.TelemetryCorrelationHttpModule.OnExecuteRequestStep(HttpContextBase context, Action step) +64
System.Web.<>c__DisplayClass284_0.<OnExecuteRequestStep>b__0(Action nextStepAction) +54
System.Web.StepInvoker.Invoke(Action executionStep) +85
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +9980101
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +159