用日志记录LINQ中的所有增删改的SQL语句的方法
2009-01-20 17:24:34 来源:WEB开发网我们知道LINQ中的增删改都要调用SubmitChanges方法,我们记录所有SQL的方式就是重写(override)DataContext中的SubmitChanges方法,为了避免每次修改dbml文件时影响我们自己写的内容,我们要先写一个DataContext的分布类,在这个类中重写SubmitChanges方法。
代码如下
Code
public partial class DataClasses1DataContext
{
public override void SubmitChanges(System.Data.Linq.ConflictMode failureMode)
{
//记录日志(每天一个文件,记录所有更改sql,日志会存在第一个盘的log文件夹下)
string directory = Path.Combine(Directory.GetLogicalDrives().First(), "log");
Directory.CreateDirectory(directory);
string logFile = Path.Combine(directory,
"log" + DateTime.Now.ToLongDateString() + ".txt");
using (StreamWriter w = File.AppendText(logFile))
{
w.WriteLine("发生时间:{0}", DateTime.Now.ToString());
w.WriteLine("日志内容为:");
this.Log = w;
try
{
base.SubmitChanges(failureMode);
}
catch (Exception e)
{
w.WriteLine("异常:" + e.Message + e.StackTrace);
w.WriteLine("--------------------------------------------------------------");
throw;
}
finally
{
this.Log = null;
}
w.WriteLine("--------------------------------------------------------------");
}
}
}
如果想把sql语句全部记录到数据库的代码如下:
Code
public partial class DataClasses1DataContext
{
StringBuilder sb = new StringBuilder();
using (StringWriter sw = new StringWriter(sb))
{
sw.WriteLine("发生时间:{0}", DateTime.Now.ToString());
sw.WriteLine("日志内容为:");
this.Log = sw;
try
{
base.SubmitChanges(failureMode);
string sqlStr = "insert into logTable(Content)values( '"+sb.ToString()+"')";
//SqlConnection con=
using (SqlConnection con=new SqlConnection(this.Connection.ConnectionString))
{
con.Open();
SqlCommand cmd = new SqlCommand(sqlStr, con);
cmd.ExecuteNonQuery();
}
}
catch (Exception e)
{
//记录日志(每天一个文件,记录所有更改sql,日志会存在第一个盘的log文件夹下)
string directory = Path.Combine(Directory.GetLogicalDrives().First(), "log");
Directory.CreateDirectory(directory);
string logFile = Path.Combine(directory,
"log" + DateTime.Now.ToLongDateString() + ".txt");
using (StreamWriter w = File.AppendText(logFile))
{
w.WriteLine("发生时间:{0}", DateTime.Now.ToString());
w.WriteLine("日志内容为:");
w.WriteLine(e.Message);
}
}
finally
{
this.Log = null;
}
}
源码下载
http://files.cnblogs.com/nuaalfm/LogLinqSql.rar
http://www.cnblogs.com/nuaalfm/archive/2009/01/20/1378841.html
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