log4net 修改日志输出格式的绝对文件路径为相对文件名

log4net-1.2.11 输出日志格式%file输出的是绝对文件路径，其实没有必要，只需要输出文件名即可。

修改源码：log4net-1.2.11\src\Layout\Pattern\FileLocationPatternConverter.cs

writer.Write(Path.GetFileName(loggingEvent.LocationInformation.FileName));

#region Apache License//// Licensed to the Apache Software Foundation (ASF) under one or more // contributor license agreements. See the NOTICE file distributed with// this work for additional information regarding copyright ownership. // The ASF licenses this file to you under the Apache License, Version 2.0// (the "License"); you may not use this file except in compliance with // the License. You may obtain a copy of the License at//// http://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License.//#endregionusing System;using System.Text;using System.IO;using log4net.Core;namespace log4net.Layout.Pattern{/// <summary>/// Writes the caller location file name to the output/// </summary>/// <remarks>/// <para>/// Writes the value of the <see cref="LocationInfo.FileName"/> for/// the event to the output writer./// </para>/// </remarks>/// <author>Nicko Cadell</author>internal sealed class FileLocationPatternConverter : PatternLayoutConverter {/// <summary>/// Write the caller location file name to the output/// </summary>/// <param name="writer"><see cref="TextWriter" /> that will receive the formatted result.</param>/// <param name="loggingEvent">the event being logged</param>/// <remarks>/// <para>/// Writes the value of the <see cref="LocationInfo.FileName"/> for/// the <paramref name="loggingEvent"/> to the output <paramref name="writer"/>./// </para>/// </remarks>override protected void Convert(TextWriter writer, LoggingEvent loggingEvent){writer.Write(Path.GetFileName(loggingEvent.LocationInformation.FileName));}}}

重新编译即可