EFProf Entity Framework Profile 工具

SQL Server Profiler用来跟踪应用程序发送到SQL Server中的SQL语句，用于检测性能，查找问题。Entity Framework 也有它的跟踪工具EFProf，用于跟踪Entity Framework发送到SQL Server中的SQL语句。

首先在代码中添加对程序集HibernatingRhinos.Profiler.Appender的引用，并添加如下方法

HibernatingRhinos.Profiler.Appender.EntityFramework.EntityFrameworkProfiler.Initialize();

再打开EFProf程序，即可看到基于Entity Framework的程序向SQL Server发送的SQL语句

执行计划 Query Plan

EFProf可以以图形化的方式查看SQL语句的执行计划，而不必去SQL Server中查看执行计划

查询执行 Query Execute

如果你想知道查询的结果，可以直接在EFProf中打开查询语句，执行查询。这一个特性能查找数据特别有用。

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.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
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.csharpcode .lnum { color: #606060; }
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font-family: consolas, "Courier New", courier, monospace;
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.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
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{
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.csharpcode .lnum { color: #606060; }

 

获取Entity Framework生成的T-SQL语句

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{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }

实体框架内建了机制来跟踪它生成的SQL语句，请参考下面的代码

using(var db = new SqlEntities())
{
        var Q = db.Sql.Select(cc => cc.id);
        return ((ObjectQuery)Q).ToTraceString();
} 

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{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }这样可以输入实体框架生成的SQL语句。

 

如何截获Entity Framework的调用

Entity Framework的社区项目EFTraceingProvider，可提供对Entity Framework调用的跟踪。