找不到C#反射异常方法
本文关键字:方法 异常 反射 找不到 | 更新日期: 2023-09-27 18:21:28
嗨,我正在开发CRM 2011插件,我对反射类型有问题。我已经生成了Entities类,并且我知道该属性存在于类型中,但当我尝试获取其值时,我会发现找不到方法的异常。最愚蠢的是,它在我的机器上运行得很好,但在客户身上却不起作用。
这是我的代码(我需要从实体中获取所有OptionSet并对它们执行操作):
public override void MyExecute()
{
var fse = TargetEntity.ToEntity<Equipment>();
Type equiptmentType = fse.GetType();
TracingService.Trace("FSE object type: {0}", equiptmentType.FullName);
IEnumerable<PropertyInfo> optionSetsProperties = equiptmentType.GetProperties()
.Where(x => x.PropertyType == typeof(OptionSetValue)).ToList(); //I'm getting this property from the object type so it must exist.
foreach (var optionSetsProperty in optionSetsProperties)
{
TracingService.Trace("Resolving ResourceGroup on property: {0}", optionSetsProperty.Name);
ResolveResourceGroupBySkill(optionSetsProperty, fse);
TracingService.Trace("Resoloving ResourceGroup finished");
}
}
private void ResolveResourceGroupBySkill(PropertyInfo optionSetsProperty, Equipment fse)
{
try
{
TracingService.Trace("Trying to get value of: {0}", optionSetsProperty.Name);
OptionSetValue skillLevel = (OptionSetValue)optionSetsProperty.GetValue(fse);
TracingService.Trace("Value equals: {0}", skillLevel);
}
catch (Exception ex)
{
TracingService.Trace("An error occured: {0}", ex.Message);
Exception inner = ex;
while (inner != null)
{
TracingService.Trace(inner.Message);
inner = inner.InnerException;
}
throw new InvalidOperationException(String.Format("Cannot get value of skill level from property: {0}", optionSetsProperty.Name), ex);
}
}
以下是日志详细信息:
Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: Method not found: 'System.Object System.Reflection.PropertyInfo.GetValue(System.Object)'.Detail:
<OrganizationServiceFault xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/xrm/2011/Contracts">
<ErrorCode>-2147220891</ErrorCode>
<ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic">
<KeyValuePairOfstringanyType>
<d2p1:key>OperationStatus</d2p1:key>
<d2p1:value xmlns:d4p1="http://www.w3.org/2001/XMLSchema" i:type="d4p1:string">0</d2p1:value>
</KeyValuePairOfstringanyType>
</ErrorDetails>
<Message>Method not found: 'System.Object System.Reflection.PropertyInfo.GetValue(System.Object)'.</Message>
<Timestamp>2014-09-11T12:58:09.2941554Z</Timestamp>
<InnerFault i:nil="true" />
<TraceText>
[OC.CSSFieldService: OC.CSSFieldService.ServiceActivity.MyPlugin]
[424ad2a7-ea29-e411-be7f-00155d0aa109: OC.CSSFieldService.ServiceActivity.MyPlugin: Create of equipment]
FSE object type: OC.Data.Equipment
Resolving ResourceGroup on property: oc_ExpeCommHyper
</TraceText>
</OrganizationServiceFault>
正如您所看到的,即使是跟踪行"尝试获取的值"也不起作用。未捕获到异常。。。我不知道该怎么办。有什么想法吗?
好的,我想明白了。服务器安装了Microsft.NET 4.0,我安装了.NET 4.5。
在.NET 4.5中,PropertyInfo.GetValue方法有一个新的重载-它是PropertyInfo.GGetValue(对象obj),因为在4.0中只有PropertyInfo.Get Value(对象obj,对象[]索引器)
我只需要更换:
OptionSetValue skillLevel = (OptionSetValue)optionSetsProperty.GetValue(fse);
带有
OptionSetValue skillLevel = (OptionSetValue)optionSetsProperty.GetValue(fse, null);
工作起来很有魅力!