我是C#的新手,所以请耐心等待,因为我继承了一个我试图调整的脚本。
我想让SQL PRINT / RAISERROR语句的输出显示在已在脚本的另一部分中声明的日志文件中。
这是我打电话的方法:
public void ProcessData(string StoredProcedure, int StartDate, int EndDate, string Directory, string LogFileNameAndPath)
{
SqlConnection sqlConnection = null;
SqlCommand sqlCommand = null;
SqlParameter sqlParameter = null;
// String outputText = null;
try
{
sqlConnection = new SqlConnection(_ConnectionString);
sqlConnection.Open();
sqlCommand = new SqlCommand();
sqlCommand.CommandType = CommandType.StoredProcedure;
sqlCommand.CommandText = StoredProcedure;
sqlCommand.Connection = sqlConnection;
sqlCommand.CommandTimeout = 0;
sqlParameter = new SqlParameter("@StartDt", SqlDbType.Int);
sqlParameter.Value = StartDate;
sqlCommand.Parameters.Add(sqlParameter);
sqlParameter = new SqlParameter("@EndDt", SqlDbType.Int);
sqlParameter.Value = EndDate;
sqlCommand.Parameters.Add(sqlParameter);
sqlParameter = new SqlParameter("@stringDirs", SqlDbType.VarChar);
sqlParameter.Value = Directory;
sqlCommand.Parameters.Add(sqlParameter);
sqlConnection.InfoMessage += new SqlInfoMessageEventHandler(OnInfoMessage);
sqlCommand.ExecuteNonQuery();
}
catch (SqlException sqlEx)
{
throw sqlEx;
}
catch (Exception ex)
{
throw new Exception(ex.ToString());
}
finally
{
if (sqlConnection != null)
{
if (sqlConnection.State != ConnectionState.Closed)
{
sqlConnection.Close();
}
}
}
}
这是信息处理程序方法:
public void OnInfoMessage(object sender, SqlInfoMessageEventArgs args)//, String LogFileNameAndPath)
{
foreach (SqlError err in args.Errors)
{
//File.AppendAllText(LogFileNameAndPath, err.Message);
Console.WriteLine("{0}", err.Message);
//return err.Message;
//"The {0} has received a severity {1}, state {2} error number {3}\n" +
// "on line {4} of procedure {5} on server {6}:\n{7}",
// err.Source, err.Class, err.State, err.Number, err.LineNumber,
// err.Procedure, err.Server, err.Message);
}
}
我想通过" File.AppendAllText(LogFileNameAndPath,err.Message)"将其写入LogFileNameAndPath变量,而不是输出到控制台。但是,我通过网络查看了很多帖子,NOBODY提供了解决方案。有没有办法做到这一点?请善待。谢谢!
=============================================== ============================
[ADDED 2015-07-27 1606 EDT] 如果我改变了这一行:
sqlConnection.InfoMessage += new SqlInfoMessageEventHandler(OnInfoMessage);
...到......
sqlConnection.InfoMessage += new SqlInfoMessageEventHandler(OnInfoMessage(LogFileNameAndPath));
......无法编译。 如何将此方法传递给方法?
以下是新方法:
public void OnInfoMessage(object sender, SqlInfoMessageEventArgs args, String LogFileNameAndPath)
{
foreach (SqlError err in args.Errors)
{
File.AppendAllText(@LogFileNameAndPath, err.Message);
//Console.WriteLine("{0}", err.Message);
}
}
答案 0 :(得分:2)
虽然直接写入文件可能对您有用(请参阅@ FirebladeDan的答案),但强烈建议您使用现有的日志记录库以提高性能。
Log4Net是一个常见的建议,this link应该是一个很好的开始。 Log4Net有一些很好的功能可以帮助您,例如通过App.Config / Web.Config文件在运行时配置日志记录的功能,这样您就可以根据配置更改日志记录级别(详细程度)而无需重新编译。
希望这能让你走上正确的道路,祝你好运!
编辑:
根据您更新的声明,此选项可能就是您所需要的。
// use a variable to store the path.
private string logFileNameAndPath;
public void ProcessData(string StoredProcedure, int StartDate, int EndDate, string Directory, string LogFileNameAndPath)
{
// Store the parameter that was passed in as the variable.
this.logFileNameAndPath = LogFileNameAndPath;
/* Do query setup work here*/
sqlConnection.InfoMessage += new SqlInfoMessageEventHandler(OnInfoMessage);
sqlCommand.ExecuteNonQuery();
}
public void OnInfoMessage(object sender, SqlInfoMessageEventArgs args)
{
foreach (SqlError err in args.Errors)
{
// Use the variable to indicate where to log to.
File.AppendAllText(this.logFileNameAndPath, err.Message);
}
}
希望这有助于您跨越终点。
答案 1 :(得分:1)
File.AppendAllText(@"pathgoeshere", err.Message);
补充:以下是如何使用AppConfig中的密钥获取值
String LogFileNameandPath = ConfigurationManager.AppSettings["keynamegoeshere"]);
将LogFileName和Path传递给您的方法**不要忘记添加引用
答案 2 :(得分:0)
您应该将日志文件名定义在别处,并在事件处理程序中可见,而不是尝试将日志文件名传递给事件处理程序。例如:
public class SqlHandler
{
private readonly string m_LogFileNameAndPath = @"C:\log.txt";
// or get it from AppConfig, as noted by FirebladeDan
public void ProcessData() { /*...*/ }
public void OnInfoMessage(object sender, SqlInfoMessageEventArgs args)
{
foreach(var err in args.Errors)
{
File.AppendAllText(m_LogFileNameAndPath, err.Message);
}
}
}
还值得注意的是,您仍然可以使用自定义文件的日志库(Log4Net,NLog等),告诉库要登录哪个文件。