WebJun 4, 2024 · SaveChangesAsync does not save changes made in the context to the database. Exception message: System.InvalidOperationException: The connection was not closed. The connection's current state is connecting. Stack trace: Exception thrown: ...
关于Entity Framework DbContext SaveChanges 返回0的求助
Web首先,定义一个TaskCompletionSource的实例。. 它接受一个泛型参数,该参数表示您想要返回的类型。. 在本例中,我们希望返回成功变量的值,这是一个布尔值,因此使用bool作为泛型参数。. var taskCompletionSource = new TaskCompletionSource (); 我们把它定义在一个helper ... WebMar 11, 2024 · tasks.Add(MyContext.SaveChangesAsync()); And you code becomes working. (await expression returns async result, without await returns Task that will be executed later) But as was mentioned before you should not execute SaveChangesAsync() each time as entity is added to context it might be done for all added entities for one time. biopharma argentina
C# Db.SaveChangesAsync方法代码示例 - 纯净天空
WebJul 21, 2014 · However, in many cases the following course of actions can be performed: Trap the exception caused by the failed call to SaveChanges (). Find out all the errors that occurred during the SaveChanges () call. Find out which entities caused the errors. Either display the errors and entities causing errors to the user or log that information somewhere. WebFeb 24, 2024 · Introduction. Asynchronous saving avoids blocking a thread while the changes are written to the database. This can be useful to avoid freezing the UI of a thick-client application. Entity Framework Core provides DbContext.SaveChangesAsync () as an asynchronous alternative to DbContext.SaveChanges (). EF Core does not support … WebC# (CSharp) DbContext.SaveChangesAsync - 34 examples found. These are the top rated real world C# (CSharp) examples of DbContext.SaveChangesAsync from package code extracted from open source projects. You can rate examples to help us improve the quality of examples. public async Task CreateAsync (TEntity item) { var entity … biophare sorel-tracy