将 MS CRM 2011 插件执行上下文序列化为 JSON

Question

我正在尝试将 MS CRM 2011 插件执行上下文序列化为 JSON 以便稍后对其进行分析（我需要找到错误的问题，并且我希望有更多人类可读形式的上下文转储）。

但我所有的尝试都会导致序列化错误，如下所示：

Newtonsoft.Json.JsonSerializationException: Error getting value from 'ServiceProvider' on 'Plugin+LocalPluginContext

插件由 Visual Studio 插件生成。代码放在基类Plugin 中，如下所示：

internal void Trace(string message)
{
    if (string.IsNullOrWhiteSpace(message) || this.TracingService == null)
    {
        return;
    }

    if (this.PluginExecutionContext == null)
    {
        this.TracingService.Trace(message);
    }
    else
    {
        this.TracingService.Trace(
            "{0}, Correlation Id: {1}, Initiating User: {2}",
            message,
            this.PluginExecutionContext.CorrelationId,
            this.PluginExecutionContext.InitiatingUserId);

        var jss = new JsonSerializerSettings();
        var dcr = new DefaultContractResolver();

        dcr.DefaultMembersSearchFlags |= System.Reflection.BindingFlags.NonPublic;
        jss.ContractResolver = dcr;

        this.TracingService.Trace("Local Context Dump: {0}", JsonConvert.SerializeObject(this, jss));
    }
}

我认为问题在于一般方法。 LocalContext 是一个非常复杂的对象。 JSON.NET 无法序列化某些类型。但我无法确定这个限制。

您能帮我纠正一下方法吗？

Answer 1

我想做一些类似的事情，但不是用 JSON 格式处理它，而是通过自己的 C# 方法创建以将其转换为字符串，然后将其添加到日志中：如果有帮助，这里是 C# 函数。

protected String GetPluginExecutionInfo(IPluginExecutionContext context)
{
    var lines = new List<String>();
    var target = GetTarget<Entity>(context);

    lines.Add("MessageName: " + context.MessageName);
    lines.Add("PrimaryEntityName: " + context.PrimaryEntityName);
    lines.Add("PrimaryEntityId: " + context.PrimaryEntityId);
    lines.Add("BusinessUnitId: " + context.BusinessUnitId);
    lines.Add("CorrelationId: " + context.CorrelationId);
    lines.Add("Depth: " + context.Depth);
    lines.Add("Has Parent Context: " + (context.ParentContext != null));
    lines.Add("InitiatingUserId: " + context.InitiatingUserId);
    AddParameters(lines, context.InputParameters, "Input Parameters");
    lines.Add("IsInTransaction: " + context.IsInTransaction);
    lines.Add("IsolationMode: " + context.IsolationMode);
    lines.Add("Mode: " + context.Mode);
    lines.Add("OperationCreatedOn: " + context.OperationCreatedOn);
    lines.Add("OperationId: " + context.OperationId);
    lines.Add("Organization: " + context.OrganizationName + "(" + context.OrganizationId + ")");
    AddParameters(lines, context.OutputParameters, "Output Parameters");
    AddEntityReference(lines, context.OwningExtension, "OwningExtension");
    AddEntityImages(lines, context.PostEntityImages, "Post Entity Images");
    AddEntityImages(lines, context.PreEntityImages, "Pre Entity Images");
    lines.Add("SecondaryEntityName: " + context.SecondaryEntityName);
    AddParameters(lines, context.SharedVariables, "Shared Variables");
    lines.Add("Stage: " + context.Stage);
    lines.Add("UserId: " + context.UserId);

    if (target == null || target.Attributes.Count == 0)
    {
        lines.Add("Target: Empty ");
    }
    else
    {
        lines.Add("* Target " + target.ToEntityReference().GetNameId() + " *");
        lines.Add(target.ToStringAttributes("    Target[{0}]: {1}"));
    }

    lines.Add("* App Config Values *");
    foreach (var key in ConfigurationManager.AppSettings.AllKeys)
    {
        lines.Add("    [" + key + "]: " + ConfigurationManager.AppSettings[key]);
    }

    return String.Join(Environment.NewLine, lines);
}

private static void AddEntityReference(List<string> nameValuePairs, EntityReference entity, string name)
{
    if (entity != null)
    {
        nameValuePairs.Add(name + ": " + entity.GetNameId());
    }
}

private static void AddEntityImages(List<string> nameValuePairs, EntityImageCollection images, string name)
{
    if (images != null && images.Count > 0)
    {
        nameValuePairs.Add("** " + name + " **");
        foreach (var image in images)
        {
            if (image.Value == null || image.Value.Attributes.Count == 0)
            {
                nameValuePairs.Add("    Image[" + image.Key + "] " + image.Value + ": Empty");
            }
            else
            {
                nameValuePairs.Add("*   Image[" + image.Key + "] " + image.Value.ToEntityReference().GetNameId() + "   *
                nameValuePairs.Add(image.Value.ToStringAttributes("        Entity[{0}]: {1}"));
            }
        }
    }
    else
    {
        nameValuePairs.Add(name + ": Empty");
    }
}

private static void AddParameters(List<string> nameValuePairs, ParameterCollection parameters, string name)
{
    if (parameters != null && parameters.Count > 0)
    {
        nameValuePairs.Add("* " + name + " *");
        foreach (var param in parameters)
        {
            nameValuePairs.Add("    Param[" + param.Key + "]: " + param.Value);
        }
    }
    else
    {
        nameValuePairs.Add(name + ": Empty");
    }
}

public static String ToStringAttributes(this Entity entity, string attributeFormat = "[{0}]: {1}")
{
    return String.Join(Environment.NewLine, entity.Attributes.Select(att => 
        String.Format(attributeFormat, att.Key, GetAttributeValue(att.Value))));
}

private static string GetAttributeValue(object value)
{
    if (value == null)
    {
        return "Null";
    }

    var osv = value as OptionSetValue;
    if (osv != null)
    {
        return osv.Value.ToString();
    }

    var entity = value as EntityReference;
    if (entity != null)
    {
        return entity.GetNameId();
    }

    return value.ToString();
}

Answer 2

您知道插件调试器的方法吗？重新检查this article，它描述了如何调试甚至位于 CRM Online 中的插件。

Answer 3

这对我来说效果更好 http://www.crmanswers.net/2015/02/json-and-crm-sandbox-plugins.html

string parameter1 = "";
using (MemoryStream memoryStream = new MemoryStream())
{
    DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Course));
    serializer.WriteObject(memoryStream, course);
    parameter1 = Encoding.Default.GetString(memoryStream.ToArray());
}