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[英]ASP.NET Core - How to convert SQL Server statement to Entity Framework Core
[英]Execute sql statement in .net entity framework core
我創建了 ASP.NET 5.0 Core-Web-API 項目並使用 package Microsoft.EntityFrameworkCore
版本 5.0.13。 如果我運行簡單的 sql 語句var simple = myDbContext.myTable.FromSqlInterpolated($"Select Id, colA, colB From Testvw")
一切都按預期工作。 如果我執行存儲在文本文件中的相同查詢,我會遇到錯誤:
string path = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
string sqlFile = Path.Combine(path, @"SQL_Ressourcen\myQuery.txt");
String sql = System.IO.File.ReadAllText(sqlFile);
var simple = myDbContext.myTable.FromSqlInterpolated($"{sql}");
System.InvalidOperationException
HResult=0x80131509
Nachricht = 'FromSqlRaw' or 'FromSqlInterpolated' was called with non-composable SQL and with a query composing over it. Consider calling 'AsEnumerable' after the method to perform the composition on the client side.
Quelle = Microsoft.EntityFrameworkCore.Relational
從文件加載查詢字符串時如何執行查詢?
我認為您可以執行以下操作:
var blogs = context.myTable
.FromSqlRaw($"Select Id, colA, colB From myTable")
.ToList();
// or AsEnumerable();
var blogs = context.myTable
.FromSqlRaw($"Select Id, colA, colB From myTable")
.AsEnumerable();
來源:原始 SQL 查詢
否則,您可以嘗試添加如下內容:
var simple = _context.myTable.FromSqlInterpolated($"Select Id, colA, colB From myTable").ToList();
問候。
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