Server Error in '/' Application.

Non-static method requires a target.

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.Reflection.TargetException: Non-static method requires a target.

Source Error:


Line 527:        using (var unitOfWork = new UnitOfWork(new Dadpub_DBContext()))
Line 528:        {
Line 529:            var item = unitOfWork.Files_R.Find(predicate).FirstOrDefault();
Line 530:            return item;
Line 531:        }

Source File: d:\hostingspaces\dadgostarpub.ir\httpdocs\App_Code\clsGetData.cs    Line: 529

Stack Trace:


[TargetException: Non-static method requires a target.]
   System.Reflection.RuntimeMethodInfo.CheckConsistency(Object target) +14498232
   System.Reflection.RuntimeMethodInfo.InvokeArgumentsCheck(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +163
   System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +98
   System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) +35
   System.Data.Entity.Core.Objects.ELinq.QueryParameterExpression.TryGetFieldOrPropertyValue(MemberExpression me, Object instance, Object& memberValue) +245
   System.Data.Entity.Core.Objects.ELinq.QueryParameterExpression.TryEvaluatePath(Expression expression, ConstantExpression& constantExpression) +411
   System.Data.Entity.Core.Objects.ELinq.QueryParameterExpression.EvaluateParameter(Object[] arguments) +120
   System.Data.Entity.Core.Objects.ELinq.ELinqQueryState.GetExecutionPlan(Nullable`1 forMergeOption) +1655
   System.Data.Entity.Core.Objects.<>c__DisplayClass36_0.<GetResults>b__1() +38
   System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +462
   System.Data.Entity.Core.Objects.<>c__DisplayClass36_0.<GetResults>b__0() +211
   System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +234
   System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +357
   System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__29_0() +30
   System.Data.Entity.Internal.LazyEnumerator`1.MoveNext() +39
   System.Linq.Enumerable.FirstOrDefault(IEnumerable`1 source) +209
   clsGetData.Get_Files(Expression`1 predicate) in d:\hostingspaces\dadgostarpub.ir\httpdocs\App_Code\clsGetData.cs:529
   ASP.default_aspx.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in d:\hostingspaces\dadgostarpub.ir\httpdocs\default.aspx:330
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +276
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +11662591
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +47
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +80
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +53
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +169
   System.Web.UI.Page.Render(HtmlTextWriter writer) +40
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +80
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4239


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4700.0