我需要在现有的log4net配置中添加一个ado appender.
我需要通过代码添加它.但是我坚持添加常见的字符串参数,如消息,因为我无法正确定义布局属性：在xml配置中,我们使用PatternLayout,但是通过代码PatternLayout不是IRowLayout所以我有以下代码的错误：
public static void AddStringParameterToAppender(this log4net.Appender.AdoNetAppender appender,string paramName,int size,string conversionPattern)
{
log4net.Appender.AdoNetAppenderParameter param = new log4net.Appender.AdoNetAppenderParameter();
param.ParameterName = paramName;
param.DbType = System.Data.DbType.String;
param.Size = size;
param.Layout = new log4net.Layout.PatternLayout(conversionPattern);
appender.AddParameter(param);
}
<parameter>
<parameterName value="@message" />
<dbType value="String" />
<size value="4000" />
<layout type="log4net.Layout.PatternLayout">
<conversionPattern value="%message" />
</layout>
</parameter>
解决方法
我终于找到了如何在IRawLayout中转换PatternLayout.
为此,您必须使用log4net.Layout.Layout2RawLayoutAdapter：
public static void AddStringParameterToAppender(this log4net.Appender.AdoNetAppender appender,string conversionPattern)
{
log4net.Appender.AdoNetAppenderParameter param = new log4net.Appender.AdoNetAppenderParameter();
param.ParameterName = paramName;
param.DbType = System.Data.DbType.String;
param.Size = size;
param.Layout = new log4net.Layout.Layout2RawLayoutAdapter(new log4net.Layout.PatternLayout(conversionPattern));
appender.AddParameter(param);
}
