输入字符串的格式不正确错误 #2

Question

我有以下要求：

   string sqlStr = @"Select a.Text, a.TrackKey, a.NoteType, a.TranKey, a.TranType, 
    Case a.TranType when '1110' then 'https://www.cps/SAM/SO/RMA/RMAView.asp?key=' 
     when '502' then 'https://www.cps/SAM/AR/InvInqDetail.asp?Key=' 
     when '511' then 'https://www.cps/SAM/AR/InvInqDetail.asp?Key=' 
     when '801' then 'https://www.cps/SAM/AR/OrdInqDetail.asp?Key='
     when '1101' then 'https://www.cps/SAM/AP/POInqDetail.asp?key=' 
     when '1111' then 'https://www.cps/SAM/PO/TruckDetail.asp?truckkey=' 
     when '835' then 'https://www.cpsm/SAM/SO/RMA/RMAView.asp?key='  End HREF, 
    Case when a.TranType = '1110' then 'M'
     when a.TranType = '502' then 'W'
     when a.TranType = '511' then 'W' 
     when a.TranType = '1101' then 'B'
     when a.TranType = '1111' then 'B'
     when a.TranType = '835' then '('  
     when (a.TranType = '801' and a.NoteType = '9') then '{'
     when (a.TranType = '801' and a.NoteType = '8') then '(' End dataicon      
    From tamTrackrEngine a 
    Where a.CreateDate > DATEADD(DAY, DATEDIFF(DAY, 0, GetDate()), 0) 
    AND (a.EmpKey = {0} OR a.EmpKey IS NULL)
    AND a.Text IS NOT NULL
    Order by a.CreateDate DESC";

    var trackrinfo = db.Database.SqlQuery<TrackrData>(sqlStr, empKey).ToList();

    var TrackrInfo = JsonConvert.SerializeObject(trackrinfo);

    Response.Write(TrackrInfo);
    HttpContext.Response.AppendHeader("Content-Type", "application/json");
    return new EmptyResult(); 

当我运行这段代码时，我得到了错误：

输入字符串的格式不正确。

我已经输入了一个更简单的 sql 查询，并没有任何问题地返回我的结果，所以我认为这与我的查询中的一些引号有关。

这是我的 StackTrace：

[FormatException: 输入字符串格式不正确。] System.Text.StringBuilder.AppendFormat(IFormatProvider provider, String format, Object[] args) +10930058 System.String.Format(IFormatProvider provider, String format, Object [] args) +63 System.Data.Entity.Core.Objects.ObjectContext.CreateStoreCommand(String commandText, Object[] 参数) +790 System.Data.Entity.Core.Objects.ObjectContext.ExecuteStoreQueryInternal(String commandText, String entitySetName, ExecutionOptions executionOptions, Object[] 参数) +208 System.Data.Entity.Core.Objects.c__DisplayClass631.<ExecuteStoreQueryReliably>b__62() +45 System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +333 System.Data.Entity.Core.Objects。 c__DisplayClass631.<ExecuteStoreQueryReliably>b__61() +140 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func1 operation) +189 System.Data.Entity.Core.Objects.ObjectContext.ExecuteStoreQueryReliably(String commandText, String entitySetName, ExecutionOptions executionOptions, Object[] 参数) +335 System.Data .Entity.Core.Objects.ObjectContext.ExecuteStoreQuery(String commandText, ExecutionOptions executionOptions, Object[] 参数) +61 System.Data.Entity.Internal.c__DisplayClass131.<ExecuteSqlQuery>b__12() +151 System.Lazy1.CreateValue() +415 System.Lazy@987654325 @1.get_Value() +75 System.Data.Entity.Internal.LazyEnumerator1.MoveNext() +12 System.Collections.Generic.List1..ctor(IEnumerable1 collection) +381 System.Linq.Enumerable.ToList(IEnumerable1 source) +58 SAM3.Controllers.SharedDataController.Trackr() 在 c:\Users\candicesteele \Source\Repos\SAM3\SAM3\Controllers\SharedDataController.cs:273 lambda_method(Closure , ControllerBase , Object[] ) +62 System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase 控制器, Object[] 参数) +14 System. Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary2 parameters) +157 System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary2 个参数) +27 System.Web.Mvc.Async.AsyncControllerActionInvoker.b__36(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22 System.Web.Mvc.Async.WrappedAsyncResult@ 987654329@1.End() +49 System.Web.Mvc.Async.AsyncContro llerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32 System.Web.Mvc.Async.AsyncInvocationWithFilters.b__3c() +50 System.Web.Mvc.Async.c__DisplayClass45.b__3e() +225 System.Web.Mvc.Async.c__DisplayClass45.b__3e() +225 System.Web.Mvc.Async.c__DisplayClass30.b__2f(IAsyncResult asyncResult) +10 System.Web.Mvc.Async.WrappedAsyncResult1.CallEndDelegate(IAsyncResult asyncResult) +10 System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +49 System.Web。 Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34 System.Web.Mvc.Async.c__DisplayClass28.b__19() +26 System.Web.Mvc.Async.c__DisplayClass1e.b__1b(IAsyncResult asyncResult) +100 System .Web.Mvc.Async.WrappedAsyncResult1.CallEndDelegate(IAsyncResult asyncResult) +10 System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27 System.Web.Mvc.Controller.b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState ) +13 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +36 System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +54 System.Web.Mvc.Controller.EndExecuteCore(IAs yncResult asyncResult）+39 System.Web.Mvc.Controller.b__15（IAsyncResult asyncResult，控制器控制器）+12 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +28 System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +54 System.Web.Mvc.Controller。 EndExecute(IAsyncResult asyncResult) +29 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10 System.Web.Mvc.MvcHandler.b__4(IAsyncResult asyncResult, ProcessRequestState innerState) +21 System.Web.Mvc.Async.WrappedAsyncVoid1.CallEndDelegate(IAsyncResult asyncResult) +36 System.Web.Mvc.Async.WrappedAsyncResultBase1.End() +54 System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +31 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest( IAsyncResult 结果) +9 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9657896 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

来源错误：

第 273 行 var trackrinfo = db.Database.SqlQuery(sqlStr, empKey).ToList();第 274 行：第 275 行：

Answer 1

内部格式会出现问题。根据该堆栈跟踪，它正在调用StringBuilder.AppendFormat。问题与你在SQL语句中的'{'有关。

这完全可以通过使用StringBuilder 进行测试。

下面爆了

System.FormatException : 输入字符串的格式不正确。

var sb = new StringBuilder();
sb.AppendFormat("'{' {0}", 1);

您可以通过将{ 加倍来解决此问题

var sb = new StringBuilder();
sb.AppendFormat("'{{' {0}", 1);

工作得很好。

{{ 应该只输出一个{。加倍它会逃脱它。

Answer 2

我没有尝试这个的环境，但从阅读documentation 看来，您的想法是正确的：

“您可以在 SQL 查询字符串中包含参数占位符，然后提供参数值作为附加参数。”

但是，您查询中的占位符似乎不正确。

将sqlStr 字符串中的{0} 替换为@p0，然后再次运行。

Answer 3

我不确定这部分：

a.EmpKey = {0}

看起来您可能在某个时候尝试过使用 string.format() 构建此查询。在任何情况下，这对我来说都不是有效的 SQL（int 不会有 {/}，如果这些是您要比较的值的一部分，它们应该在 's 中。）