using Microsoft.EntityFrameworkCore; 简单无参数的SQL语句//执行查询语句 var result = dbContext.Posts.FromSqlRaw("Select * from dbo.Posts"); 带参数的SQL语句(简单形式)注意:不建议使用简单形式,容易造成SQL注入问题int id = 666; var result3 = dbContext.Posts.FromSqlRaw("Select * from dbo.Blog ...
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean...
详细异常信息: Object reference not set to an instance of an object.Anonymously Hosted DynamicMethods Assemblyat lambda_method(Closure , QuerySourceScope )at System.Linq.Enumerable.WhereSelectEnumerableIterator2.MoveNext()at Microsoft.Data.Entity.Query.EntityQueryExecutor.EnumerableExceptionInterceptor1.Enumerat...
Database.FromSQLRawAsync() 并使用动态。asp.net-core entity-framework-core asp.net-core-mvc closedxml closedxml.report 1个回答 0投票 ClosedXML 需要 XLCellValue 作为单元格值。有工厂方法可以从 XLCellValue 创建适当的 object worksheet.Cell(currentRow, j + 1).Value = XLCellValue.FromObject(dr...
at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToListAsync[TSource](IQueryable`1 source, CancellationToken cancellationToken) at TestEfCore.Program.Main() in ~\Projects\TestWeb\TestEfCore\Program.cs:line 27 As anIReadOnlySet<double>instead: ...
Async read from SerialPort.BaseStream with timeout Async/Await - How to stop the insanity Asynchronous FTP with the new Async methods Attempted to read or write protected memory attempted to read or write protected memory!! Attempted to read or write protected memory. This is often an indicatio...
8.优化select语句,这方面技巧同样适用于其他带where的delete语句等,在where子句的列上设置索引;索引对于引...
问EF Core有时执行SELECT查询需要很长时间ENServer可能会因为参数嗅探而延迟查询，这并不是什么新问题。
ConfirmEmailAsync(user.Id, code) Invalid URI: The Uri string is too long. HttpClient InvalidOperationException: X509 certificate does not have a private key. invoke a jquery click function without button being clicked? Is a controller a singleton??? Is a static variable shared by all the ...
public async Task<IActionResult> OnGetAsync(string email) { List<string> countriesList = GetCountriesList.GetCountries(); Debug.WriteLine("*** countriesListReturned: " + countriesList.ToString()); for (int i = 0; i < 195; i++) { try { Debug....