c#项目出现类型“System.Decimal”的对象无法转换为类型“System.Int32”。异常，下划线是报错的地方

using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using Omu.ValueInjecter;

namespace MadMan.Li.Common.Data
{
public class ReaderInjection : KnownSourceValueInjection<IDataReader>
{
protected override void Inject(IDataReader source, object target)
{
for (var i = 0; i < source.FieldCount; i++)
{
var activeTarget = target.GetProps().GetByName(source.GetName(i),true);
if (activeTarget == null) continue;

var value = source.GetValue(i);
if (value == DBNull.Value) continue;

activeTarget.SetValue(target, value);
}
}
}
}